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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (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 from 28 to 34. Stars have been significant features in the design of many United States coins and their number has varied from one to forty–eight stars. Most of the coins issued from about 1799 to the early years of the twentieth century bore thirteen stars representing the thirteen original colonies. Curiously enough, the first American silver coins, issued in 1794, had fifteen stars because by that time Vermont and Kentucky has joined the Union. At that time it was apparently the intention of mint officials to add a star for each new state. Following the admission of Tennessee in 1796, for example, some varieties of half dimes, dimes, and halfdollars were produced with sixteen stars. As more states were admitted to the Union, however, it quickly became apparent that this scheme would not prove practical and the coins from A798 on were issued with only thirteen stars–one for each of the original colonies. Due to an error at the mint, one variety of the A828 half cent was issued with only twelve stars. There is also a variety of the large cent with only A2 stars, but this is the result of a die break and is not a true error. The expression “Curiously enough” is used because the author finds it strange that _______

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 397 lượt xem 6 năm trước
Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.Question 4

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (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 from 28 to 34. Stars have been significant features in the design of many United States coins and their number has varied from one to forty–eight stars. Most of the coins issued from about 1799 to the early years of the twentieth century bore thirteen stars representing the thirteen original colonies. Curiously enough, the first American silver coins, issued in 1794, had fifteen stars because by that time Vermont and Kentucky has joined the Union. At that time it was apparently the intention of mint officials to add a star for each new state. Following the admission of Tennessee in 1796, for example, some varieties of half dimes, dimes, and halfdollars were produced with sixteen stars. As more states were admitted to the Union, however, it quickly became apparent that this scheme would not prove practical and the coins from A798 on were issued with only thirteen stars–one for each of the original colonies. Due to an error at the mint, one variety of the A828 half cent was issued with only twelve stars. There is also a variety of the large cent with only A2 stars, but this is the result of a die break and is not a true error. The word “bore” in line 3 is closest in meaning to ________

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (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 from 28 to 34. Stars have been significant features in the design of many United States coins and their number has varied from one to forty–eight stars. Most of the coins issued from about 1799 to the early years of the twentieth century bore thirteen stars representing the thirteen original colonies. Curiously enough, the first American silver coins, issued in 1794, had fifteen stars because by that time Vermont and Kentucky has joined the Union. At that time it was apparently the intention of mint officials to add a star for each new state. Following the admission of Tennessee in 1796, for example, some varieties of half dimes, dimes, and halfdollars were produced with sixteen stars. As more states were admitted to the Union, however, it quickly became apparent that this scheme would not prove practical and the coins from A798 on were issued with only thirteen stars–one for each of the original colonies. Due to an error at the mint, one variety of the A828 half cent was issued with only twelve stars. There is also a variety of the large cent with only A2 stars, but this is the result of a die break and is not a true error. The word “their” in line 1 refers to _______

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (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 from 28 to 34. Stars have been significant features in the design of many United States coins and their number has varied from one to forty–eight stars. Most of the coins issued from about 1799 to the early years of the twentieth century bore thirteen stars representing the thirteen original colonies. Curiously enough, the first American silver coins, issued in 1794, had fifteen stars because by that time Vermont and Kentucky has joined the Union. At that time it was apparently the intention of mint officials to add a star for each new state. Following the admission of Tennessee in 1796, for example, some varieties of half dimes, dimes, and halfdollars were produced with sixteen stars. As more states were admitted to the Union, however, it quickly became apparent that this scheme would not prove practical and the coins from A798 on were issued with only thirteen stars–one for each of the original colonies. Due to an error at the mint, one variety of the A828 half cent was issued with only twelve stars. There is also a variety of the large cent with only A2 stars, but this is the result of a die break and is not a true error. What is the main topic of the passage?

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is OPPOSITE in meaning to the underlined word(s) in each of the following questions. Maria will take charee of the advertising for the play.

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions. Question 3:

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.Question 2:

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is OPPOSITE in meaning to the underlined word(s) in each of the following questions. She decided to remain celibate and devote her life to helping the homeless and orphans.

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. Question 1

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 6)

* Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSET in meaning to the underlined word(s) in each of the following questions. I don't like that man. There is a sneaky look on his face.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. Which of the following does the passage infer?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 416 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. word "trigger" as used in the first paragraph is closest in meaning to which of the following?

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 6)

* Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSET in meaning to the underlined word(s) in each of the following questions. Professor Berg was very interested in the diversity of cultures all over the world.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. The word "phenomenon" in line 7 refers to which of the following?

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. - Hoa: "Write to me when you get home."           - Phong: “.......................................................................”

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. Which of the following is NOT cited as a possible risk factor?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 315 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. According to the passage, which of the following is NOT a possible cause of many heart attacks?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 397 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. The phrase "susceptible to" in line 6 could best be replaced by

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 0.9 K lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. The word "potential" could best be re-placed by which of the following?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 544 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 8. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising. Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M. In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered. What does the passage mainly discuss?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 5. A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance. According to the scientists, the woolly mammoths may have managed to survive because they

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 3)

Sơ đồ phả hệ dưới đây mô tả hai bệnh di truyền ở người, bệnh bạch tạng do một gen có 2 alen năm tren NST thường quy định, bệnh mù màu do một gen có 2 alen nằm trên NST X tại vùng không tương đồng trên Y quy định. Xác suất sinh một con gái không bị bệnh nào của cặp vợ chồng (13) và (14) là

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 5. A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance. The author uses the word "counterpart" in line 7 to refer to

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Hỗn hợp X gồm Na, Ba, Na2O và BaO. Hòa tan hoàn toàn 131,4 gam X vào nước, thu được 6,72 lít khí H2 (đktc) và dung dịch Y, trong đó có 123,12 gam Ba(OH)2. Hấp thụ hoàn toàn 40,32 lít khí CO2 (đktc) vào Y, thu được m gam kết tủa.Giá trị của m là: 

Hóa học Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Hòa tan hết 2,52 gam bột Fe vào 130 ml dung dịch HCl 1M, thu được dung dịch X. Cho X tác dụng với lượng dư dung dịch AgNO3, sau khi kết thúc các phản ứng thu được khí NO (sản phẩm khử duy nhất, đktc) và m gam chất rắn. Giá trị của m là: 

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 5. A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance. The word "woolly" as used in line 1 refers to the animal's

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 542 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 5. A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance. According to the passage, some researchers suggest that mammoths became extinct

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Chia hỗn hợp X gồm K, Al, Fe thành hai phần bằng nhau. Cho phần 1 vào dung dịch KOH dư thu được 0,784 lít khí H2 (đktc). Cho phần 2 vào một lượng dư H2O, thu được 0,448 lít khí H2 (đktc) và m gam hỗn hợp kim loại Y. Hòa tan hoàn toàn Y vào dung dịch HCl dư, thu được 0,56 lít khí H2 (đktc). Khối lượng (tính theo gam) của K, Al, Fe trong mỗi phần hỗn hợp X lần lượt là

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20 Bộ đề ôn tập Hóa Học 10 có lời giải cực hay (Đề số 9)

Hòa tan 6,76 gam oleum vào nước dung dịch Y, để trung hòa dung dịch Y cần 160 ml dung dịch NaOH 1M. Công thức phân tử tử oleum là

Hóa học Lớp 10
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

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 from 1 to 5. A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance. With which topic is this passage mainly concerned?

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 3)

Ở một loài thú, tính trạng màu mắt do một gen quy định. Khi cho con đực mắt đỏ giao phối với con cái mắt đỏ, F1 thu được tỉ lệ 75% mắt đỏ: 25% mắt trắng, trong đó tất cả các cá thể mắt trắng đều là cái. Nếu cho các cá thể mắt đỏ F1 giao phối tự do với nhau thì tỉ lệ con cái mắt đỏ thu được ở đời lai là bao nhiêu?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Cho m gam Fe vào bình đựng dung dịch H2SO4 và HNO3 thu được dung dịch X và 1,12 lít khí NO. Thêm tiếp H2SO4 dư vào bình được 0,448 lít NO và dung dịch Y. Trong cả 2 trường hợp đều có NO là sản phẩm khử duy nhất ở đktC. Dung dịch Y hòa tan vừa hết 2,08 gam Cu không tạo sản phẩm khử N+5. Các phản ứng đều hoàn toàn. Giá trị của m là: 

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Fill in the appropriate word in question 37 Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (33)_______ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way, (34)_______ very hard rocks are worn away by the wind. When particles of rocks or soil became loosened in any way, running water carries them down the hillsides. Some rocks and soil particles are carried into streams and then into the sea. Land that is covered with trees, grass and other plants wear away very slowly, and so loses very (35)_______ of its soil. The roots of plants help to hold the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground. Thus, forests and grasslands help to slow down erosion. Even where the land is (36)_______ covered with plants, some erosion goes on. In the spring, the melting snow turns into a large quantity of water that then runs downhill in streams. As a stream carries away some of the soil, the stream bed gets deeper and deeper. (37)_______ thousands of years of such erosion, wide valleys are often formed.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Hấp thụ hoàn toàn 0,336 lít khí CO2 (đktc) vào 200 ml dung dịch gồm NaOH 0,1M và KOH 0,1M thu được dung dịch X. Cô cạn dung dịch X thu được bao nhiêu gam chất rắn khan?

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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 3)

Xét 1 quần thể người ở trạng thái cân bằng, trong đó tỉ lệ người bị thuận tay trái (aa) là 16%, một gen lặn khác (m) nằm trên vùng không tương đồng của NST giới tính X qui định bệnh P. Tần số xuất hiện bệnh ở người nữ là 1/100. Xác suất để một cặp vợ chồng thuận tay phải và không bị bệnh P sinh ra một đứa con gái thuận tay trái và không mang alen gây bệnh P là bao nhiêu? Biết rằng các tính trạng đều có quan hệ trội lặn hoàn toàn

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Fill in the appropriate word in question 36 Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (33)_______ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way, (34)_______ very hard rocks are worn away by the wind. When particles of rocks or soil became loosened in any way, running water carries them down the hillsides. Some rocks and soil particles are carried into streams and then into the sea. Land that is covered with trees, grass and other plants wear away very slowly, and so loses very (35)_______ of its soil. The roots of plants help to hold the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground. Thus, forests and grasslands help to slow down erosion. Even where the land is (36)_______ covered with plants, some erosion goes on. In the spring, the melting snow turns into a large quantity of water that then runs downhill in streams. As a stream carries away some of the soil, the stream bed gets deeper and deeper. (37)_______ thousands of years of such erosion, wide valleys are often formed.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Hỗn hợp X gồm Cu và CuO (trong đó tỉ lệ % khối lượng CuO là 29,41%). Cho m gam X tác dụng với dung dịch HNO3 loãng được sản phẩm khử duy nhất là 0,2 mol NO. Vậy m gam X phản ứng với nhiều nhất là bao nhiêu lít dung dịch HCl 1M? 

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Fill in the appropriate word in question 33 Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (33)_______ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way, (34)_______ very hard rocks are worn away by the wind. When particles of rocks or soil became loosened in any way, running water carries them down the hillsides. Some rocks and soil particles are carried into streams and then into the sea. Land that is covered with trees, grass and other plants wear away very slowly, and so loses very (35)_______ of its soil. The roots of plants help to hold the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground. Thus, forests and grasslands help to slow down erosion. Even where the land is (36)_______ covered with plants, some erosion goes on. In the spring, the melting snow turns into a large quantity of water that then runs downhill in streams. As a stream carries away some of the soil, the stream bed gets deeper and deeper. (37)_______ thousands of years of such erosion, wide valleys are often formed.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Cho 1,42 gam P2O5 tác dụng hoàn toàn với 50 ml dung dịch KOH 1M, thu được dung dịch X. Cô cạn dung dịch X thu được chất rắn khan gồm:

Hóa học Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 3)

Ở một loài thực vật, alen A quy định thân cao trội hoàn toàn so với alen a quy định thân thấp; alen B quy định quả tròn trội hoàn toàn so với alen b quy định quả dài. Các cặp gen này phân li độc lập. Cho hai cây lai với nhau, thu được F1 có tỉ lệ kiểu hình cây thân cao, quả dài chiếm 25%. Biết rằng không phát sinh đột biến. Có bao nhiêu phép lai phù hợp với kết quả trên?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Fill in the appropriate word in question 34 Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (33)_______ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way, (34)_______ very hard rocks are worn away by the wind. When particles of rocks or soil became loosened in any way, running water carries them down the hillsides. Some rocks and soil particles are carried into streams and then into the sea. Land that is covered with trees, grass and other plants wear away very slowly, and so loses very (35)_______ of its soil. The roots of plants help to hold the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground. Thus, forests and grasslands help to slow down erosion. Even where the land is (36)_______ covered with plants, some erosion goes on. In the spring, the melting snow turns into a large quantity of water that then runs downhill in streams. As a stream carries away some of the soil, the stream bed gets deeper and deeper. (37)_______ thousands of years of such erosion, wide valleys are often formed.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Dung dịch X gồm a mol Na+; 0,15 mol K+; 0,1 mol HCO3-; 0,15 mol CO32- và 0,05 mol SO42-. Tổng khối lượng muối trong dung dịch X là: 

Hóa học Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 3)

Ở một loài thực vật, xét một cá thể có kiểu gen AaBbDEde. Người ta tiến hành thu hạt phấn của cây này rồi tiến hành nuôi cấy trong điều kiện thí nghiệm, sau đó lưỡng bội hóa thành công toàn bộ các cây con. Cho rằng quá trình phát sinh hạt phấn có 40% số tế bào đã xảy ra hoán vị gen giữa các alen D và d. Theo lí thuyết, số loại kiểu gen tối đa của các cây con lưỡng bội và tỉ lệ của dòng thuần mang toàn các alen trội thu được từ quá trình nuôi cấy nói trên lần lượt là:

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Fill in the appropriate word in question 33 Wind, water, air, ice and heat all work to cause erosion. As the wind blows over the land, it often (33)_______ small grains of sand. When these grains of sand strike against solid rocks, the rocks are slowly worn away. In this way, (34)_______ very hard rocks are worn away by the wind. When particles of rocks or soil became loosened in any way, running water carries them down the hillsides. Some rocks and soil particles are carried into streams and then into the sea. Land that is covered with trees, grass and other plants wear away very slowly, and so loses very (35)_______ of its soil. The roots of plants help to hold the rocks and soil in place. Water that falls on grasslands runs away more slowly than water that falls on bare ground. Thus, forests and grasslands help to slow down erosion. Even where the land is (36)_______ covered with plants, some erosion goes on. In the spring, the melting snow turns into a large quantity of water that then runs downhill in streams. As a stream carries away some of the soil, the stream bed gets deeper and deeper. (37)_______ thousands of years of such erosion, wide valleys are often formed.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Hòa tan hoàn toàn 1,6 gam Cu bằng dung dịch HNO3, thu được x mol NO2 (là sản phẩm khử duy nhất của N+5). Giá trị của x là: 

Hóa học Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 3)

Một gen có tỉ lệ giữa các loại nuclêôtit là G+XA+T=17. Tính theo lí thuyết, tỉ lệ phần trăm từng loại nuclêôtit của gen là:

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. She heard the news of the death of her father. She fainted.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề ôn thi THPTQG môn Hóa Học cực hay có lời giải ( Đề số 5)

Trong công nghiệp crom được điều chế bằng phương pháp

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 13)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. He felt very tired. However, he was determined to continue to climb up the mountain.

Tiếng Anh Tốt nghiệp THPT
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