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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 49

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.“Shall I help you do the dishes, Carlo?” said Robert.

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Đề ôn luyện thi THPTQG Sinh Học có lời giải (Đề số 17)

Một quần thể sinh vật ngẫu phối đang chịu tác động của chọn lọc tự nhiên có cấu trúc di truyền ở các thế hệ sau: AAAaaaP0,50,30,2F10,450,250,3F20,40,20,4F30,30,150,55F40,150,10,75Nhận xét nào sau đây là đúng về tác động của chọn lọc tự nhiên đối với quần thể này?

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BÀI TẬP TÍNH TOÁN

Để tác dụng vừa đủ với m gam hỗn hợp X gồm Cr và kim loại M có hóa trị không đổi cần vừa đúng 2,24 lít hỗn hợp khí Y (đktc) gồm O2 và Cl2 có tỷ khối đối với H2 là 27,7 thu được 11,91 gam hỗn hợp Z gồm các oxit và muối clorua. Mặt khác, cho m gam hỗn hợp X tác dụng với một lượng dư dung dịch HNO3 đặc, nguội thu được 2,24 lít khí NO2 (đktc) là sản phẩm khử duy nhất. Các phản ứng xảy ra hoàn toàn. Kim loại M là:

Hóa học Lớp 12

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.The accident happened as a result of the driver’s not paying attention to the road.

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 48

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Bài kiểm tra Lipit - Chất béo có lời giải chi tiết (Đề số 2)

Cho các chất sau đây phản ứng với nhau:(1) CH3COONa + CO2 + H2O;(2) (CH3COO)2Ca + Na2CO3;(3) CH3COOH + NaHSO4;(4) CH3COOH + CaCO3;(5) C17H35COONa + Ca(HCO3)2;(6) C6H5ONa + CO2 + H2O;(7) CH3COONH4 + Ca(OH)2;Số phản ứng không xảy ra là

Hóa học Lớp 12

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.There won’t be peace in the conflict if both sides do not really desire it.

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BÀI TẬP VỀ PHẢN ỨNG ESTE HÓA

Chia hỗn hợp X gồm một rượu đơn chức và axit đơn chức thành 3 phần bằng nhau: - Phần 1: tác dụng hết với natri thu được 2,24 lít H2 (đktc)- Phần 2: bị đốt cháy hoàn toàn thu được 8,96 lít CO2 (đktc) - Phần 3: bị este hóa hoàn toàn ta thu được 1 este . Đốt cháy hoàn toàn 0,11 g este này thì thu được 0,22 gam CO2 và 0,09 gam H2O. Vậy công thức phân tử của rượu và axit là

Hóa học Lớp 12

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.Sarah was not best speaker in the class, but her personality and ability to convey her feelings helped her become the most requested.

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Đề ôn luyện thi THPTQG Sinh Học có lời giải (Đề số 17)

Khi nói về quá trình phiên mã ở sinh vật nhân thực, có các phát biểu sau 1. Tất cả các gen trên NST đều được phiên mã nhưng với số lần không bằng nhau 2. Sự phiên mã này chỉ xảy ra ở trong nhân tế bào 3. Không phải tất cả quá trình phiên mã đều trải qua giai đoạn hoàn thiện mARN 4.Quá trình phiên mã thường tạo ra nhiều loại mARN trường thành khác nhau từ 1 gen duy nhất. 5. Quá trình phiên mã chỉ xảy ra trong pha G1 của chu kỳ tế bào Số phát biểu đúng là :

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.The only means of access to the station is through a dark subway

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18 Bài tập phản ứng tráng bạc của monosaccarit

Chia m gam glucozơ thành 2 phần bằng nhau:Phần 1. Đem thực hiện phản ứng tráng bạc thu được 27 gam AgPhần 2. Cho lên men thu được V ml rượu (d rượu = 0,8 g/ml)Giả sử phản ứng xảy ra hoàn toàn thì V có giá trị là :

Hóa học Lớp 12

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. He is over the moon about his examination result

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 47

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.Spanish is the only course that it is not offered in the summer term, but there are several classes offered in the fall.

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable answer to complete each of the following exchangesReceptionist: “ Good morning.”Chris: “ Good morning. I’ve come to ____ Mrs. Dabria.”

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Bài 2: Phương trình lượng giác cơ bản

Giải phương trình sau: tan3x.tanx = 1

Toán Lớp 11

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 46

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.The school officials are considering a comprehensive planning to alleviate the problem of overcrowding in the dormitories.

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable answer to complete each of the following exchangesAnne: “ Fancy a bite to eat?”Barbara: “_____”

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 45

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Bài 2: Phương trình lượng giác cơ bản

Giải phương trình sau: sin3x - cos5x = 0

Toán Lớp 11

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

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.

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18 Bài tập phản ứng tráng bạc của monosaccarit

Hỗn hợp X gồm saccarozơ và glucozơ cùng số mol được đun nóng với lượng dư dung dịch AgNO3/NH3 thu được 3 gam Ag. Nếu thủy phân hoàn toàn hỗn hợp rồi mới cho sản phẩm thực hiện phản ứng tráng bạc thì lượng Ag tối đa có thể thu được là

Hóa học Lớp 12

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Bài 2: Phương trình lượng giác cơ bản

Với giá trị nào của x thì giá trị của các hàm số y = tan(π/4 - x) và y = tan 2x bằng nhau?

Toán Lớp 11

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

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 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.Question:Which of the following best expresses the essential information in the highlighted sentence in the passage?

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

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

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18 Bài tập phản ứng tráng bạc của monosaccarit

Hòa tan hết m gam hỗn hợp glucozơ và saccarozơ (có tỉ lệ mol 1 : 1) vào nước, thu được dung dịch E. Cho toàn bộ E tác dụng với lượng dư dung dịch AgNO3 trong NH3 , đun nóng, thu được tối đa 6,48 gam Ag. Giá trị của m là

Hóa học Lớp 12

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 44

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

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

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Bài 2: Phương trình lượng giác cơ bản

Giải phương trình sau: sin3x.cotx = 0

Toán Lớp 11

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18 Bài tập phản ứng tráng bạc của monosaccarit

Hỗn hợp X gồm etyl axetat và glucozơ. Để đốt cháy hoàn toàn m gam hỗn hợp X cần vừa đủ 44,8 lít oxi ( đktc), sau phản ứng thu được 83,6 gam CO2. Nếu cho m gam X nói trên tráng bạc hoàn toàn th́ì lượng Ag thu được là

Hóa học Lớp 12

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 43

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Bài 2: Phương trình lượng giác cơ bản

Giải phương trình sau: cos2x.tanx = 0

Toán Lớp 11

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

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

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18 Bài tập phản ứng tráng bạc của monosaccarit

Cho 7,2 gam hỗn hợp gồm glucozơ và fructozơ tác dụng với AgNO3 dư (trong dung dịch NH3, đun nóng). Sau khi phản ứng xảy ra hoàn toàn, thu được m gam Ag. Giá trị của m là

Hóa học Lớp 12

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 questionsThroughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication.People sometimes wonder (43) you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) time observing people’s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _ of movement.If you turn down the sound on your television set and try to understand (46) _ is happening simply by watching the picture you will learn even more about communication (47) _ words. By turning the sound back up every five (48) or so, it is possible to check how accurate your (49) is.Having studied the art of body language you will have a definite (50) at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) __ interpreting the body language of all the other people there.Question 42

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Bài 2: Phương trình lượng giác cơ bản

Giải phương trình sau: cot3x - 1 = -3

Toán Lớp 11

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 17)

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 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.Question:It can be inferred from paragraph 4 that

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

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.There were no poor performance. Moreover, that of the Russian dancers was certainly the best

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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 question below.We find that bright children are rarely held back by mixed-ability teaching. On the contrary, both their knowledge and experience are enriched. We feel that there are many disadvantages in streaming pupils. It does not take into account the fact that children develop at different rates. It can have a bad effect on both the bright and the not-so-bright child. After all, it can be quite discouraging to be at the bottom of the top grade!Besides, it is rather unreal to grade people just according to their intellectual ability. This is only one aspect of their total personality. We are concerned to develop the abilities of all our pupils to the full, not just their academic ability. We also value personal qualities and social skills, and we find that mixed-ability teaching contributes to all these aspects of learning.In our classroom, we work in various ways. The pupils often work in groups; this gives them the opportunity to learn to co-operate, to share, and to develop leadership skills. They also learn how to cope with the personal problems as well as learning how to think, to make decisions, to analyze and evaluate, to communicate effectively. The pupils learn from each other as well as from the teachers.Sometimes the pupils work in pairs; sometimes the work on individual tasks and assignments, they can do this at their own speed. They also have some formal class teaching when this is appropriate. We encourage our pupils to use the library, and we teach them the skills they need in order to do this effectively. An advanced pupil can do advanced works; it does not matter what age the child is. We expect our pupils to do their best, not their least, and we give them every encouragement to attain this goalAccording to the author, mixed-ability teaching is more preferable because _______

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BÀI TẬP TÍNH TOÁN

Nhiệt phân một lượng natri đicromat với hiệu suất 80% thu được 1,344 lít khí (đktc) và chất rắn A. Cho toàn bộ chất rắn A tác dụng với một lượng dư dung dịch Ba(OH)2 loãng đến khi phản ứng xảy ra hoàn toàn thu được m gam kết tủa. Giá trị của m là:

Hóa học Lớp 12

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Bài 2: Phương trình lượng giác cơ bản

Giải phương trình sau: tanx - 15° = 33

Toán Lớp 11

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

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.The traffic is so heavy. It will take us at least an hour to get there

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 17)

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 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.Question:In order for life to develop, a planet’s orbit must not be

Tiếng Anh Tốt nghiệp THPT

Xem chi tiết 606 lượt xem 6 năm trước

Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 14)

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 question below.We find that bright children are rarely held back by mixed-ability teaching. On the contrary, both their knowledge and experience are enriched. We feel that there are many disadvantages in streaming pupils. It does not take into account the fact that children develop at different rates. It can have a bad effect on both the bright and the not-so-bright child. After all, it can be quite discouraging to be at the bottom of the top grade!Besides, it is rather unreal to grade people just according to their intellectual ability. This is only one aspect of their total personality. We are concerned to develop the abilities of all our pupils to the full, not just their academic ability. We also value personal qualities and social skills, and we find that mixed-ability teaching contributes to all these aspects of learning.In our classroom, we work in various ways. The pupils often work in groups; this gives them the opportunity to learn to co-operate, to share, and to develop leadership skills. They also learn how to cope with the personal problems as well as learning how to think, to make decisions, to analyze and evaluate, to communicate effectively. The pupils learn from each other as well as from the teachers.Sometimes the pupils work in pairs; sometimes the work on individual tasks and assignments, they can do this at their own speed. They also have some formal class teaching when this is appropriate. We encourage our pupils to use the library, and we teach them the skills they need in order to do this effectively. An advanced pupil can do advanced works; it does not matter what age the child is. We expect our pupils to do their best, not their least, and we give them every encouragement to attain this goalAccording to the passage, “streaming pupils” ______

Tiếng Anh Tốt nghiệp THPT

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18 Bài tập phản ứng tráng bạc của monosaccarit

Để tráng bạc một chiếc gương soi, người ta phải đun nóng dung dịch chứa 18 gam glucozơ với lượng vừa đủ dung dịch AgNO3/NH3. Khối lượng bạc đã sinh ra bám vào mặt kính của gương và khối lượng AgNO3 cần dùng lần lượt là (biết các phản ứng xảy ra hoàn toàn)

Hóa học Lớp 12

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions.In the United States among 60 percent of the space on the pages of newspapers is reserved for advertising

Tiếng Anh Tốt nghiệp THPT

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Đề luyện thi THPT quốc gia môn tiếng anh có lời giải (Đề số 10)

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questionsRabbit and hares look much like and are often mistaken for each other.

Tiếng Anh Tốt nghiệp THPT

Xem chi tiết 11 K lượt xem 6 năm trước

Lớp 12

Lớp 11

Lớp 10

Ôn vào 10

Lớp 9

Lớp 8

Lớp 7

Lớp 6

Ôn vào 6

Lớp 5

Lớp 4

Lớp 3

Lớp 2

Lớp 1

Đại học

ĐGNL - ĐGTD

Tốt nghiệp THPT

Ôn vào 10

Ôn vào 6

V-ACT

HSA

TSA

SPT

Toán

Văn

Tiếng Anh

Vật lý

Hóa học

Sinh học

Lịch sử

Địa lý

Giáo dục Kinh tế và Pháp luật

Tin học

Công nghệ

Toán

Văn

Tiếng Anh

Hóa học

Lịch sử

Địa lí

Toán

Văn

Toán

Văn

Tiếng Anh

Vật lý

Hóa học

Sinh học

Toán

Văn

Tiếng Anh

Vật lý

Hóa học

Sinh học

Khoa học tự nhiên

Tin học

Lịch sử

Địa lí

Toán

Văn

Tiếng Anh

Khoa học tự nhiên

Lịch sử & Địa lí

Giáo dục công dân

Tin học

Công nghệ

Toán

Tiếng Anh

Khoa học tự nhiên

Lịch sử & Địa lí

Giáo dục công dân

Tin học

Công nghệ

Toán

Văn

Tiếng Anh

Khoa học tự nhiên

Lịch sử & Địa lí

Giáo dục công dân

Tin học