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Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Công thức tổng quát của este sinh bởi axit đơn chức no, mạch hở và ancol  thuộc dãy đồng đẳng của ancol benzylic là

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 22)

The H5N1 infected patients have to _______ others to prevent the virus from spreading

Tiếng Anh Tốt nghiệp THPT
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20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Cho các ví dụ về biến động số lượng cá thể của quần thể sinh vật sau:(1) Ở miền Bắc Việt Nam, số lượng bò sát giảm mạnh vào những năm có mùa đông giá rét, nhiệt độ xuống dưới 8°C.(2) Số lượng thỏ và mèo rừng Canada biến động theo chu kì 9-10 năm.(3) Ở Việt Nam, vào mùa xuân và mùa hè có khí hậu ấm áp, sâu hại xuất hiện nhiều.(4) Ở đồng rêu phương Bắc, số lượng cáo và chuột lemmut biến động theo chu kì 3 - 4 năm.(5) Số lượng cây tràm ở rừng U Minh Thượng giảm mạnh sau sự cố cháy rừng tháng 3 năm 2002.(6) Hàng năm, chim cu gáy thường xuất hiện nhiều vào mùa thu hoạch lúa, ngô.Có bao nhiêu ví dụ về biến động số lượng cá thể của quần thể sinh vật mà nguyên nhân gây biến động là nhân tố không phụ thuộc mật độ quần thể?

Sinh học Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 26)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Pesticide residues in fruit and vegetable can be _______ to health.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 22)

Jane got married_______ Peter two years ago, but now they have split

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTGQ môn Toán cực cực hay có lời giải chi tiết(Đề 3)

Cho hàm số y = f(x) có bảng biến thiên như sauHỏi đồ thị hàm số đã cho có tất cả bao nhiêu đường tiệm cận?

Toán Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 22)

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.The state school system is free for all students and _______ by the government.

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 26)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Your brother hardly talks to anyone, _______?

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 22)

Read the following passage and mark the letter A, B, C, D on your answer sheet to indicate the correct answer to each of the questions.Face-to-face conversation is a two-way process: You speak to me, I reply to you and so on. Two-way (18)_______ depends on having a coding system that is understood by both sender and (19)_______, and an agreed convention about signaling the beginning and end of the message. In speech, the coding system is the language like English or Spanish; the convention that one person speaks at a time may seem too obvious to mention. In fact, the signals (20)_______ in conversation and meetings are often (21)_______. For example, lowering the pitch of the voice may mean the end of a sentence, a sharp intake of breath may signal the desire to interrupt, catching the chairman’s eye may indicate the desire to speak in a formal setting like a debate, a clenched fist may indicate anger. When (22)_______ visual signals are not possible, more formal signals may be needed.Điền ô số 22

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Trong điều kiện thích hợp glucozơ lên men tạo thành khí CO2 và

Hóa học Tốt nghiệp THPT
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20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Ở chim khi đem lai P đều thuần chủng, F1 đồng loạt có một kiểu hình, F2 phân li kiểu hình theo tỉ lệ 907 con lông trắng, mỏ dài: 412 con lông trắng, mỏ ngắn: 301 con lông nâu, mỏ dài. Xác định quy luật di truyền ảnh hướng tới 2 tính trạng trên.

Sinh học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.When being interviewed, you should concentrate on what the interviewer is saying or asking you

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 22)

Read the following passage and mark the letter A, B, C, D on your answer sheet to indicate the correct answer to each of the questions.Face-to-face conversation is a two-way process: You speak to me, I reply to you and so on. Two-way (18)_______ depends on having a coding system that is understood by both sender and (19)_______, and an agreed convention about signaling the beginning and end of the message. In speech, the coding system is the language like English or Spanish; the convention that one person speaks at a time may seem too obvious to mention. In fact, the signals (20)_______ in conversation and meetings are often (21)_______. For example, lowering the pitch of the voice may mean the end of a sentence, a sharp intake of breath may signal the desire to interrupt, catching the chairman’s eye may indicate the desire to speak in a formal setting like a debate, a clenched fist may indicate anger. When (22)_______ visual signals are not possible, more formal signals may be needed.Điền ô số 21

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTGQ môn Toán cực cực hay có lời giải chi tiết(Đề 3)

Tìm điểm cực đại x0  của hàm số y = x3-3x+1

Toán Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Khi sản xuất C2H4 từ C2H5OH và H2SO4 đặc, nóng trong sản phẩm khí tạo ra có lẫn 2 tạp chất là CO2 và SO2. Hóa chất được chọn để loại bỏ hai tạp chất khí đó là

Hóa học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.Peter didn’t mean to be disrepsectful to his teacher. He just couldn’t control his temper.

Tiếng Anh Tốt nghiệp THPT
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20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Một số nhận xét về hình ảnh bên như sau:(1)  Hình ảnh bên diễn tả giới hạn sinh thái về nhiệt độ của cá rô phi ở Việt Nam.(2) Sức sống của sinh vật cao nhất, mật độ lớn nhất trong khoảng cực thuận của giới hạn sinh thái.(3) Khoảng của các nhân tố sinh thái gây ức chế cho hoạt động sinh lý của sinh vật gọi là khoảng chống chịu.(4) Giới hạn sinh thái là khoảng giá trị xác định của các nhân tố sinh thái ở đó sinh vật có thể tồn tại và phát triển ổn định theo thời gian.(5) Khi loài mở rộng khu phân bố thì giới hạn sinh thái của loài cũng được mở rộngCó bao nhiêu nhận xét sai?

Sinh học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions. The medical community continues to make progress in the fight against cancer

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Chất nào sau đây không điều chế trực tiếp được axetilen?

Hóa học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.It can be inferred from the passage that the arrival of horses in the Americas_____.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTGQ môn Toán cực cực hay có lời giải chi tiết(Đề 3)

Cho hàm số y = 2x-1x+2. Mệnh đề nào sau đây đúng?

Toán Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Cho sơ đồ điều chế HNO3 trong phòng thí nghiệm: Phát biểu nào sau đây là sai khi nói về quá trình điều chế HNO3?

Hóa học Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 26)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.Tom denied _______ part in the fighting at school.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.It can be inferred from the passage that Indians did NOT_____.

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 26)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.The architects have made _______ use of glass and transparent plastic.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.According to the passage, American Indians invented various methods for_____.

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 26)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.We truly respected our father and always _______ by his rule.

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 26)

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.The energy _______ from the sun is renewable and environmentally-friendly.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTGQ môn Toán cực cực hay có lời giải chi tiết(Đề 3)

Đường cong trong hình bên là đồ thị của một hàm số trong bốn hàm số được liệt kê ở bốn phương án A, B, C, D dưới đây. Hỏi hàm số đó là hàm số nào?

Toán Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.The word “provisions” in the second paragraph is closest in meaning to_____.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Bảng dưới đây ghi lại hiện tượng khi làm thí nghiệm với các chất X, Y, Z, T ở dạng dung dịch với dung môi nước:                 Chất/thuốc thửXYZTDung dịch AgNO3/NH3, đun nhẹKhông có kết tủaAg↓Không có kết tủaAg↓Cu(OH)2lắc nhẹCu(OH)2 không tanDung dịch xanh lamDung dịch xanh lamDung dịch xanh lamNước bromMất màu nước brom và có kết tủa trắng xuất hiệnMất màu nước bromKhông mất màu nước bromKhông mất màu nước bromCác chất X, Y, Z, T lần lượt là:

Hóa học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.According to the passage, after the arrival of Europeans, the Indian tribes inhabiting the Great Plains_____.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.5 K lượt xem 6 năm trước
20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Con đường thoát hơi nước qua bề mặt lá (qua cutin) có đặc điểm là:

Sinh học Tốt nghiệp THPT
Xem chi tiết 130 K lượt xem 4 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.The author of the passage probably believes that the popular image of American Indians before the arrival of Europeans_____.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 754 lượt xem 6 năm trước
20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Khi nói về đột biến cấu trúc NST, có bao nhiêu phát biểu sau đây không đúng?(1) Để nhận biết các dạng đột biến người ta quan sát sự tiếp hợp NST ở kì đầu giảm phân 1.(2) Lặp đoạn làm cho 2 gen alen cùng nằm trên một nhiễm sắc thể.(3) Đảo đoạn góp phần tạo ra sự đa dạng giữa các nòi trong một loài.(4) Mất đoạn được ứng dụng để làm công cụ phòng trừ sâu hại.(5) Chỉ có đột biến chuyển đoạn là tạo nên nguồn nguyên liệu cho quá hình tiến hóa.

Sinh học Tốt nghiệp THPT
Xem chi tiết 1.7 K lượt xem 6 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.According to the passage, American Indians_____.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 3.4 K lượt xem 6 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.The word “Those” in the first paragraph refers to_____.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 436 lượt xem 6 năm trước
Tổng hợp đề ôn thi THPTQG Hóa Học cực hay có lời giải (Đề số 2)

Axit cacboxylic X mạch hở, chứa hai liên kết π trong phân tử. X tác dụng với NaHCO3 (dư) sinh ra khí CO2 có số mol bằng số mol X phản ứng. Chất X có công thức ứng với công thức chung là

Hóa học Tốt nghiệp THPT
Xem chi tiết 737 lượt xem 6 năm trước
20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Trong các phát biểu sau đây, có bao nhiêu phát biểu không đúng?(1) Một mã di truyền luôn mã hoá cho một loại axit amin.(2) Đơn phân cấu trúc của ARN gồm 4 loại nuclêôtit là A, U, G, X.(3) Ở sinh vật nhân thực, axit amin mở đầu cho chuỗi pôlipeptit hoàn chinh là foocmin mêtiônin.(4) Phân tử tARN và rARN là những phân tử có cấu tạo theo nguyên tắc bổ sung.(5) Ở trong tế bào, trong các loại ARN thì rARN có hàm lượng cao nhất.

Sinh học Tốt nghiệp THPT
Xem chi tiết 1 K lượt xem 6 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.According to the passage, how many genetic species of horses are known today?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 2.2 K lượt xem 6 năm trước
30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 25)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questionsFish that live on the sea bottom benefit by being flat and hugging the contours. There are two very different types of flatfish and they have evolved in very separate ways. The skates and rays, relatives of the sharks have become flat in what might be called the obvious way. Their bodies have grown out sideways to form great “wings” They look as though they have been flattened but have remained symmetrical and “the right way up”. Conversely fish such as plaice, sole, and halibut have become flat in a different way. There are bony fish which have a marked tendency to be flattened in a vertical direction; they are much “taller” than they are wide. They use their whole vertically flattened bodies as swimming surfaces, which undulate through the water as they move. Therefore when * their ancestors migrated to the seabed, they lay on one side than on their bellies. However, this raises the problem that one eye was always looking down into the sand and was effectively useless - In evolution this problem was solved by the lower eye “moving” around the other side. We see this process of moving around enacted in the development of every young bony flatfish. It starts life swimming near the surface, and is symmetrical and vertically flattened, but then the skull starts to grow in a strange asymmetrical twisted fashion, so that one eye for instance the left, moves over the top of the head upwards, an old Picasso - like vision. Incidentally, some species of 20 flatfish settle on the right side, others on the left, and others on either side.Question:According to the passage, the ability of a bony flatfish to move its eyes around is______

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 363 lượt xem 6 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Prehistoric horses were far removed from the horses that Christopher Columbus brought on his ships during his second voyage to the New World. Although fossil remains of “dawn horses” have been excavated in several sites in Wyoming and New Mexico, these animal, which were biologically different from contemporary horses, had been extinct several millennia before onset of the Indian era. Although moviegoers visualize an Indian as a horse rider, Indians were not familiar with horses until the Spanish brought them to Mexico, New Mexico, Florida, and the West Indies in 1519. Those that escaped from the conquerors or were left behind became the ancestors of the wild horses that still roam the southwestern regions of the country. The Indian tribe scattered in the western plains began to breed horse about 1600.The arrival of the horse produced a ripple effect throughout the Great Plains as the Indians living there were not nomadic and engaged in rudimentary farming and grazing land hunting. Tracking stampeding herds of buffalo and elk on foot was not the best way to stock quantities of meat to adequately feed the entire tribe during the winter. However, mounted on horses, the hunting team could cover ground within a substantial distance from their camps and transport their game back to be roasted, dried into jerky, or smoke for preservation. The hunters responsible for tribe provisions stayed on the move almost continuously, replacing their earth-and-sod lodges with tepees. Horses carried not only their riders but also their possessions and booty. The Blackfoot Indians of the Canadian plains turned almost exclusive hunters, and the Crow split off from the mainstream Indian farming in favor of hunting. In fact, some of the Apache splinter groups abandoned agricultural cultivation altogether.The horse also drastically altered Indian warfare by allowing rapid maneuvering before, during, and after skirmishes. With the advent of the horse, the Apache, Arapahoe, and Cheyenne established themselves as territorial monopoly in the Plains. Because Indians did not have the wheel and had dragged their belongings from one settlement to another, horse also enabled them to become more mobile and expedient during tribal migration. In fact, the Cheyenne abolished the custom of discarding belongings and tepee skins simply because there were no means to transport them.The word “excavated” is closest in meaning to_____.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 416 lượt xem 6 năm trước
20 đề thi thử THPTQG môn Sinh học năm 2019 - 2020 (Đề số 15)

Xitôkinin có vai trò:

Sinh học Tốt nghiệp THPT
Xem chi tiết 0.9 K lượt xem 6 năm trước
30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 25)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questionsFish that live on the sea bottom benefit by being flat and hugging the contours. There are two very different types of flatfish and they have evolved in very separate ways. The skates and rays, relatives of the sharks have become flat in what might be called the obvious way. Their bodies have grown out sideways to form great “wings” They look as though they have been flattened but have remained symmetrical and “the right way up”. Conversely fish such as plaice, sole, and halibut have become flat in a different way. There are bony fish which have a marked tendency to be flattened in a vertical direction; they are much “taller” than they are wide. They use their whole vertically flattened bodies as swimming surfaces, which undulate through the water as they move. Therefore when * their ancestors migrated to the seabed, they lay on one side than on their bellies. However, this raises the problem that one eye was always looking down into the sand and was effectively useless - In evolution this problem was solved by the lower eye “moving” around the other side. We see this process of moving around enacted in the development of every young bony flatfish. It starts life swimming near the surface, and is symmetrical and vertically flattened, but then the skull starts to grow in a strange asymmetrical twisted fashion, so that one eye for instance the left, moves over the top of the head upwards, an old Picasso - like vision. Incidentally, some species of 20 flatfish settle on the right side, others on the left, and others on either side.Question:The word “this” refers to_____

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 460 lượt xem 6 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 2.5 K lượt xem 6 năm trước
30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 25)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questionsFish that live on the sea bottom benefit by being flat and hugging the contours. There are two very different types of flatfish and they have evolved in very separate ways. The skates and rays, relatives of the sharks have become flat in what might be called the obvious way. Their bodies have grown out sideways to form great “wings” They look as though they have been flattened but have remained symmetrical and “the right way up”. Conversely fish such as plaice, sole, and halibut have become flat in a different way. There are bony fish which have a marked tendency to be flattened in a vertical direction; they are much “taller” than they are wide. They use their whole vertically flattened bodies as swimming surfaces, which undulate through the water as they move. Therefore when * their ancestors migrated to the seabed, they lay on one side than on their bellies. However, this raises the problem that one eye was always looking down into the sand and was effectively useless - In evolution this problem was solved by the lower eye “moving” around the other side. We see this process of moving around enacted in the development of every young bony flatfish. It starts life swimming near the surface, and is symmetrical and vertically flattened, but then the skull starts to grow in a strange asymmetrical twisted fashion, so that one eye for instance the left, moves over the top of the head upwards, an old Picasso - like vision. Incidentally, some species of 20 flatfish settle on the right side, others on the left, and others on either side.Question:The word “conversely” is closest in meaning to:

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 398 lượt xem 6 năm trước
30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 25)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questionsFish that live on the sea bottom benefit by being flat and hugging the contours. There are two very different types of flatfish and they have evolved in very separate ways. The skates and rays, relatives of the sharks have become flat in what might be called the obvious way. Their bodies have grown out sideways to form great “wings” They look as though they have been flattened but have remained symmetrical and “the right way up”. Conversely fish such as plaice, sole, and halibut have become flat in a different way. There are bony fish which have a marked tendency to be flattened in a vertical direction; they are much “taller” than they are wide. They use their whole vertically flattened bodies as swimming surfaces, which undulate through the water as they move. Therefore when * their ancestors migrated to the seabed, they lay on one side than on their bellies. However, this raises the problem that one eye was always looking down into the sand and was effectively useless - In evolution this problem was solved by the lower eye “moving” around the other side. We see this process of moving around enacted in the development of every young bony flatfish. It starts life swimming near the surface, and is symmetrical and vertically flattened, but then the skull starts to grow in a strange asymmetrical twisted fashion, so that one eye for instance the left, moves over the top of the head upwards, an old Picasso - like vision. Incidentally, some species of 20 flatfish settle on the right side, others on the left, and others on either side.Question:It can be inferred from the passage that horizontal symmetrical fish _____

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 615 lượt xem 6 năm trước
Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 15)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 269 lượt xem 6 năm trước

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