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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Đốt cháy hoàn toàn 0,1 mol hỗn hợp X gồm các chất : metan, metanol, anđehit axetic và metyl fomat. Hấp thụ sản phẩm cháy vào bình chứa 200 ml dung dịch NaOH 1M, thu được dung dịch có chứa 8,48 gam Na2CO3 và b gam NaHCO3. Xác định khối lượng bình tăng lên.

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 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questionsHumans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants. The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them. In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world‟s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms. The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season. Question:The word ‘clog’ in bold is closest in meaning to

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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 32 to 33. The distinction between schooling and education implied by this remark is important. 

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Một loại polime rất bền với nhiệt và axit, được tráng lên "chảo chống dính" là polime có tên gọi nào sau đây?

Hóa học Lớp 12
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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

In the symphony orchestra, bass drums are not _________ kettle drums.

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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 32 to 33.Biologists long regarded it as an example of adaptation by natural selection, but for physicists it bordered on the miracle. 

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GIẢI BÀI TẬP HÓA HỌC HAY VÀ KHÓ DỰA TRÊN SỰ BẢO TOÀN ĐIỆN TÍCH CỦA CÁC ION TRONG DUNG DỊCH

Hòa tan hoàn toàn m gam hỗn hợp gồm Na2O và Al2O3 vào nước, thu được dung dịch X. Thêm từ từ dung dịch HCl 1M vào X, khi hết 100 ml thì bắt đầu xuất hiện kết tủa; khi hết 300 ml hoặc 700 ml thì đều thu được a gam kết tủa. Giá trị của a và m lần lượt 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 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questionsHumans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants. The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them. In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world‟s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms. The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season. Question:The word ‘marring’ in bold is closest in meaning to

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Hỗn hợp Z gồm 2 este X và Y tạo bởi cùng 1 ancol và 2 axit cacboxylic đồng đẳng kế tiếp (MX < MY). Đốt cháy hoàn toàn m gam Z cần dùng 6,16 lít O2 (đktc), thu được 5,6 lít CO2 (đktc) và 4,5 gam H2O. Giá trị của m là:

Hóa học Lớp 12
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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

Martin Luther King Jr, after his father's assassination, __________ the mission of his father to fight for the rights of blacks in America and achieved some notable success in the 1970s.

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Đốt cháy hoàn toàn 0,3 mol hỗn hợp X gồm propilen và 2 amin no mạch hở đồng đẳng kế tiếp trong oxi dư thu được 16,8 lít CO2, 2,016 lít N2 (đktc) và 16,74 gam H2O. Khối lượng của amin có khối lượng mol phân tử nhỏ hơn là

Hóa học Lớp 12
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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Hỗn hợp X gồm hai este no, đơn chức, mạch hở. Đốt cháy hoàn toàn một lượng X cần dùng vừa đủ 3,976 lít khí O2  (ở đktc), thu được 6,38 gam CO2. Mặt khác, X tác dụng với dung dịch NaOH, thu được một muối và hai ancol là đồng đẳng kế tiếp. Công thức phân tử của hai este trong X là:

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 27 to 31. The Progressive MovementThe progressive movement was a powerful and broad-based movement of reform that had lasting effects on the American political system in the first two decades of the twentieth century. It arose in reaction to the domination of the social and political system by business interests and rampant corruption throughout the political party system during the period following the end of the Civil War in 1865. Progressivism emerged as a force during the presidency of Theodore Roosevelt, from 1901 to 1909, and reached its height in the presidential campaign of 1912. By the time the United States entered World War I in 1917, progressivism as a force had faded from the political scene. The progressive movement was focused on instigating, or initiating change in three different areas. One area that was of major interest to the progressive movement was the imposition of legal and government control over big business, which had usurped an extraordinary amount of power in the era of the wealthy industrial barons such as Rockefeller and Carnegie. A second area of interest to the progressive movement was the improvement of the social system in order to rid society of the poverty, slum housing, and exploitation of immigrant and child labor that were a part of the era. A final area of interest was the cleaning up of the political system to move political decisions back into the realm of direct democratic control and away from the corrupt backroom deals that plagued the world of politics. Progressivism was a grassroots movement that first gained force at the local level. In cities such as Cincinnati and Cleveland, effective urban reform movements took hold, and city officials were appointed or elected to run their respective cities along nonpartisan lines and out from under the control of political parties and bosses. The progressive movement then worked its way from the local level to the state level and then on to the national level. In the state of Wisconsin, for example, "Fighting Bob" La Follette led the drive for change, first in his role as governor of the state (1901-1906) and later as the U.S. senator representing the state (1906-1925). Under his leadership, numerous reforms were instituted: state regulation of the railroads increased, policies directed at improving the lives of workers -- such as workers' compensation and unemployment insurance -- were instituted, and in the political arena, selection of party candidates was determined by direct democratic vote rather than through backroom political wrangling. The author mentions “workers' compensation and unemployment insurance” in paragraph 3 in order to ______ . 

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Hợp chất A (chứa C, H, O) có tỉ khối hơi so với metan là 8,25, thuộc loại hợp chất đa chức khi phản ứng với NaOH tạo ra muối và ancol. Số lượng hợp chất thỏa mãn tính chất của X là

Hóa học Lớp 12
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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

According to legend, coffee beans ______ in the town of  Kaffa.

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questionsHumans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants. The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them. In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world‟s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms. The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season. Question:With what topic does this passage primarily deal?

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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 27 to 31. The Progressive MovementThe progressive movement was a powerful and broad-based movement of reform that had lasting effects on the American political system in the first two decades of the twentieth century. It arose in reaction to the domination of the social and political system by business interests and rampant corruption throughout the political party system during the period following the end of the Civil War in 1865. Progressivism emerged as a force during the presidency of Theodore Roosevelt, from 1901 to 1909, and reached its height in the presidential campaign of 1912. By the time the United States entered World War I in 1917, progressivism as a force had faded from the political scene. The progressive movement was focused on instigating, or initiating change in three different areas. One area that was of major interest to the progressive movement was the imposition of legal and government control over big business, which had usurped an extraordinary amount of power in the era of the wealthy industrial barons such as Rockefeller and Carnegie. A second area of interest to the progressive movement was the improvement of the social system in order to rid society of the poverty, slum housing, and exploitation of immigrant and child labor that were a part of the era. A final area of interest was the cleaning up of the political system to move political decisions back into the realm of direct democratic control and away from the corrupt backroom deals that plagued the world of politics. Progressivism was a grassroots movement that first gained force at the local level. In cities such as Cincinnati and Cleveland, effective urban reform movements took hold, and city officials were appointed or elected to run their respective cities along nonpartisan lines and out from under the control of political parties and bosses. The progressive movement then worked its way from the local level to the state level and then on to the national level. In the state of Wisconsin, for example, "Fighting Bob" La Follette led the drive for change, first in his role as governor of the state (1901-1906) and later as the U.S. senator representing the state (1906-1925). Under his leadership, numerous reforms were instituted: state regulation of the railroads increased, policies directed at improving the lives of workers -- such as workers' compensation and unemployment insurance -- were instituted, and in the political arena, selection of party candidates was determined by direct democratic vote rather than through backroom political wrangling. The word “instigating” in paragraph 2 is closest in meaning to _______ . 

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 15)

Chất phản ứng với dung dịch FeCl3 cho kết tủa là

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 27 to 31. The Progressive MovementThe progressive movement was a powerful and broad-based movement of reform that had lasting effects on the American political system in the first two decades of the twentieth century. It arose in reaction to the domination of the social and political system by business interests and rampant corruption throughout the political party system during the period following the end of the Civil War in 1865. Progressivism emerged as a force during the presidency of Theodore Roosevelt, from 1901 to 1909, and reached its height in the presidential campaign of 1912. By the time the United States entered World War I in 1917, progressivism as a force had faded from the political scene. The progressive movement was focused on instigating, or initiating change in three different areas. One area that was of major interest to the progressive movement was the imposition of legal and government control over big business, which had usurped an extraordinary amount of power in the era of the wealthy industrial barons such as Rockefeller and Carnegie. A second area of interest to the progressive movement was the improvement of the social system in order to rid society of the poverty, slum housing, and exploitation of immigrant and child labor that were a part of the era. A final area of interest was the cleaning up of the political system to move political decisions back into the realm of direct democratic control and away from the corrupt backroom deals that plagued the world of politics. Progressivism was a grassroots movement that first gained force at the local level. In cities such as Cincinnati and Cleveland, effective urban reform movements took hold, and city officials were appointed or elected to run their respective cities along nonpartisan lines and out from under the control of political parties and bosses. The progressive movement then worked its way from the local level to the state level and then on to the national level. In the state of Wisconsin, for example, "Fighting Bob" La Follette led the drive for change, first in his role as governor of the state (1901-1906) and later as the U.S. senator representing the state (1906-1925). Under his leadership, numerous reforms were instituted: state regulation of the railroads increased, policies directed at improving the lives of workers -- such as workers' compensation and unemployment insurance -- were instituted, and in the political arena, selection of party candidates was determined by direct democratic vote rather than through backroom political wrangling.The word “rampant” in paragraph 1 is closest in meaning to _____ . 

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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

More than anything, what saved Jamestown was the highly successful cultivation of tobacco, ________ Indian assistance with farming undoubtedly played a major part as well

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questions.Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (38) __________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (39) ___________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (40) __________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (41) ___________ is followed. People may bow, grab another‟s arm or even slap the other person on the back. In some places people just smile, look at the other‟s face and say nothing. Most people in the world are tolerant of visitors and don‟t mind what travellers do that seems wrong as long as the visitors are (42)__________. A big part of the delightfulness of world travel is experiencing different customs. Question 42:

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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 27 to 31. The Progressive MovementThe progressive movement was a powerful and broad-based movement of reform that had lasting effects on the American political system in the first two decades of the twentieth century. It arose in reaction to the domination of the social and political system by business interests and rampant corruption throughout the political party system during the period following the end of the Civil War in 1865. Progressivism emerged as a force during the presidency of Theodore Roosevelt, from 1901 to 1909, and reached its height in the presidential campaign of 1912. By the time the United States entered World War I in 1917, progressivism as a force had faded from the political scene. The progressive movement was focused on instigating, or initiating change in three different areas. One area that was of major interest to the progressive movement was the imposition of legal and government control over big business, which had usurped an extraordinary amount of power in the era of the wealthy industrial barons such as Rockefeller and Carnegie. A second area of interest to the progressive movement was the improvement of the social system in order to rid society of the poverty, slum housing, and exploitation of immigrant and child labor that were a part of the era. A final area of interest was the cleaning up of the political system to move political decisions back into the realm of direct democratic control and away from the corrupt backroom deals that plagued the world of politics. Progressivism was a grassroots movement that first gained force at the local level. In cities such as Cincinnati and Cleveland, effective urban reform movements took hold, and city officials were appointed or elected to run their respective cities along nonpartisan lines and out from under the control of political parties and bosses. The progressive movement then worked its way from the local level to the state level and then on to the national level. In the state of Wisconsin, for example, "Fighting Bob" La Follette led the drive for change, first in his role as governor of the state (1901-1906) and later as the U.S. senator representing the state (1906-1925). Under his leadership, numerous reforms were instituted: state regulation of the railroads increased, policies directed at improving the lives of workers -- such as workers' compensation and unemployment insurance -- were instituted, and in the political arena, selection of party candidates was determined by direct democratic vote rather than through backroom political wrangling. Which of the sentences below expresses the essential information in the highlighted sentence in paragraph 2? 

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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

Columbia University's School of Public Health is ___ a handful of schools of public health in the United States.

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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 27 to 31. The Progressive MovementThe progressive movement was a powerful and broad-based movement of reform that had lasting effects on the American political system in the first two decades of the twentieth century. It arose in reaction to the domination of the social and political system by business interests and rampant corruption throughout the political party system during the period following the end of the Civil War in 1865. Progressivism emerged as a force during the presidency of Theodore Roosevelt, from 1901 to 1909, and reached its height in the presidential campaign of 1912. By the time the United States entered World War I in 1917, progressivism as a force had faded from the political scene. The progressive movement was focused on instigating, or initiating change in three different areas. One area that was of major interest to the progressive movement was the imposition of legal and government control over big business, which had usurped an extraordinary amount of power in the era of the wealthy industrial barons such as Rockefeller and Carnegie. A second area of interest to the progressive movement was the improvement of the social system in order to rid society of the poverty, slum housing, and exploitation of immigrant and child labor that were a part of the era. A final area of interest was the cleaning up of the political system to move political decisions back into the realm of direct democratic control and away from the corrupt backroom deals that plagued the world of politics. Progressivism was a grassroots movement that first gained force at the local level. In cities such as Cincinnati and Cleveland, effective urban reform movements took hold, and city officials were appointed or elected to run their respective cities along nonpartisan lines and out from under the control of political parties and bosses. The progressive movement then worked its way from the local level to the state level and then on to the national level. In the state of Wisconsin, for example, "Fighting Bob" La Follette led the drive for change, first in his role as governor of the state (1901-1906) and later as the U.S. senator representing the state (1906-1925). Under his leadership, numerous reforms were instituted: state regulation of the railroads increased, policies directed at improving the lives of workers -- such as workers' compensation and unemployment insurance -- were instituted, and in the political arena, selection of party candidates was determined by direct democratic vote rather than through backroom political wrangling. It can be inferred from the passage that the progressive movement strongly influenced the American political system for _____. 

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questions.Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (38) __________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (39) ___________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (40) __________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (41) ___________ is followed. People may bow, grab another‟s arm or even slap the other person on the back. In some places people just smile, look at the other‟s face and say nothing. Most people in the world are tolerant of visitors and don‟t mind what travellers do that seems wrong as long as the visitors are (42)__________. A big part of the delightfulness of world travel is experiencing different customs. Question 41:

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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

Mark the letter A, B, C, or Don your answer sheet to indicate the underlined part that needs correction in each of the following questions from 24 to 26. If you have some sufficient knowledge of English, you can make yourself understand almost everywhere. 

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questions.Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (38) __________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (39) ___________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (40) __________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (41) ___________ is followed. People may bow, grab another‟s arm or even slap the other person on the back. In some places people just smile, look at the other‟s face and say nothing. Most people in the world are tolerant of visitors and don‟t mind what travellers do that seems wrong as long as the visitors are (42)__________. A big part of the delightfulness of world travel is experiencing different customs. Question 40:

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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

Living organisms contain more water _______ substance.

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

Mark the letter A, B, C, or Don your answer sheet to indicate the underlined part that needs correction in each of the following questions from 24 to 26. They had discussion about training not only the new employees but also giving them some challenges. 

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questions.Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (38) __________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (39) ___________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (40) __________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (41) ___________ is followed. People may bow, grab another‟s arm or even slap the other person on the back. In some places people just smile, look at the other‟s face and say nothing. Most people in the world are tolerant of visitors and don‟t mind what travellers do that seems wrong as long as the visitors are (42)__________. A big part of the delightfulness of world travel is experiencing different customs. Question 39:

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

Mark the letter A, B, C, or Don your answer sheet to indicate the underlined part that needs correction in each of the following questions from 24 to 26. Upon reaching the destination, a number of personnel is expected to change their reservations and proceed to Hawaii. 

Tiếng Anh Tốt nghiệp THPT
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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 14)

X có công thức phân tử là C3H10N2O2. Cho 10,6 gam X phản ứng với một lượng vừa đủ dung dịch NaOH đun nóng, thu được 9,7 gam muối khan và khí Y bậc 1 làm xanh quỳ ẩm. Công thức cấu tạo của X là :

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 19 to 23. Culture ClashIn Africa a famous food company tried to sell its baby food by advertising it with the picture of a baby on the label. They did not know that this particular country used labels only to (19)_________ a picture of the food inside. When Pepsico used the slogan "Come alive with Pepsi' in Taiwan, they had no idea that it would be translated into Chinese as 'Pepsi (20) ________ your ancestors back from the dead’. Misunderstandings such as these about language or about culture are sometimes comical but can also cause genuine hurt or anger. Business styles (21) ________ widely in different countries and what is normal in one culture can be completely unacceptable in another. Socialising in different countries can be tricky. In Arabic countries, for example, people do not discuss business (22) _________ meals. Giving gifts is another potential problem: in the UK most people take presents to a dinner party, but in many countries this is not polite because it (23) _________ you think the host is poor.Điền ô số 23

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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

The wind-rippled sand at California's Kelso Dunes resembles_______ .

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questions.Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (38) __________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (39) ___________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (40) __________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (41) ___________ is followed. People may bow, grab another‟s arm or even slap the other person on the back. In some places people just smile, look at the other‟s face and say nothing. Most people in the world are tolerant of visitors and don‟t mind what travellers do that seems wrong as long as the visitors are (42)__________. A big part of the delightfulness of world travel is experiencing different customs. Question 38

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 14)

Một este X tạo bởi axit đơn chức và ancol đơn chức có tỉ khối với He bằng 22. Khi đun nóng X với dung dịch NaOH tạo ra muối có khối lượng bằng 1722 khối lượng este đã phản ứng. Tên X là:

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 19 to 23. Culture ClashIn Africa a famous food company tried to sell its baby food by advertising it with the picture of a baby on the label. They did not know that this particular country used labels only to (19)_________ a picture of the food inside. When Pepsico used the slogan "Come alive with Pepsi' in Taiwan, they had no idea that it would be translated into Chinese as 'Pepsi (20) ________ your ancestors back from the dead’. Misunderstandings such as these about language or about culture are sometimes comical but can also cause genuine hurt or anger. Business styles (21) ________ widely in different countries and what is normal in one culture can be completely unacceptable in another. Socialising in different countries can be tricky. In Arabic countries, for example, people do not discuss business (22) _________ meals. Giving gifts is another potential problem: in the UK most people take presents to a dinner party, but in many countries this is not polite because it (23) _________ you think the host is poor. Điền ô số 22

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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

The lower _______ is in a room, the more slowly our eyes focus.

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 19 to 23. Culture ClashIn Africa a famous food company tried to sell its baby food by advertising it with the picture of a baby on the label. They did not know that this particular country used labels only to (19)_________ a picture of the food inside. When Pepsico used the slogan "Come alive with Pepsi' in Taiwan, they had no idea that it would be translated into Chinese as 'Pepsi (20) ________ your ancestors back from the dead’. Misunderstandings such as these about language or about culture are sometimes comical but can also cause genuine hurt or anger. Business styles (21) ________ widely in different countries and what is normal in one culture can be completely unacceptable in another. Socialising in different countries can be tricky. In Arabic countries, for example, people do not discuss business (22) _________ meals. Giving gifts is another potential problem: in the UK most people take presents to a dinner party, but in many countries this is not polite because it (23) _________ you think the host is poor.Điền ô số 21

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 14)

Chất nào sau đây là amin bậc 2?

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 19 to 23. Culture ClashIn Africa a famous food company tried to sell its baby food by advertising it with the picture of a baby on the label. They did not know that this particular country used labels only to (19)_________ a picture of the food inside. When Pepsico used the slogan "Come alive with Pepsi' in Taiwan, they had no idea that it would be translated into Chinese as 'Pepsi (20) ________ your ancestors back from the dead’. Misunderstandings such as these about language or about culture are sometimes comical but can also cause genuine hurt or anger. Business styles (21) ________ widely in different countries and what is normal in one culture can be completely unacceptable in another. Socialising in different countries can be tricky. In Arabic countries, for example, people do not discuss business (22) _________ meals. Giving gifts is another potential problem: in the UK most people take presents to a dinner party, but in many countries this is not polite because it (23) _________ you think the host is poor. Điền ô số 20

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 14)

Để phân biệt da thật và da giả làm bằng PVC, người ta thường dùng phương pháp đơn giản là :

Hóa học Lớp 12
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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 26)

Each of the following sentences has four underlined words or phrases marked A, B, C, and D. Choose the word or phrase which be changed in order for the sentence to be correct.The central purpose of management is for making (A) every action or decision(B) help achieve (C) a carefully (D)chosen goal.

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 19 to 23. Culture ClashIn Africa a famous food company tried to sell its baby food by advertising it with the picture of a baby on the label. They did not know that this particular country used labels only to (19)_________ a picture of the food inside. When Pepsico used the slogan "Come alive with Pepsi' in Taiwan, they had no idea that it would be translated into Chinese as 'Pepsi (20) ________ your ancestors back from the dead’. Misunderstandings such as these about language or about culture are sometimes comical but can also cause genuine hurt or anger. Business styles (21) ________ widely in different countries and what is normal in one culture can be completely unacceptable in another. Socialising in different countries can be tricky. In Arabic countries, for example, people do not discuss business (22) _________ meals. Giving gifts is another potential problem: in the UK most people take presents to a dinner party, but in many countries this is not polite because it (23) _________ you think the host is poor.Điền ô số 19

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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 14)

Khi đốt cháy polime X chỉ thu được khí CO2 và hơi nước với tỉ lệ số mol tương ứng là 1 : 1. X là polime nào dưới đây ?

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions from 17 to 18. I had to pay through the nose to get my car repaired at a service station in the middle of the desert. 

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 11)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer for each of the questions. Understanding India's Caste SystemIt has been said that life is what we make of it. In other words, if we work hard and focus on our goals, we can have great careers and enjoy high status is society. However, these opportunities don‟t exist for everyone. In some places, the family you are born into will decide almost everything about your life. India‟s caste system is an example of this. The caste system is a major part of the Hindu religion that has existed for thousands of years. It is a way of organizing and grouping people based on the occupation of the family. Castes will determine whom people can socialize with and their place in society. Originally, a person‟s caste was supposed to be determined by their personality, but over time it has been linked to their job and family.There are four classes, also known as varnas, in India‟s caste system. The highest one is Brahmin. People in this class have jobs in education and religion. These are seen as extremely important functions for the society as they deal with the knowledge. The second highest level is the Kshatriya, or ruling class. People from this group can be soldiers, landowners, or have jobs in politics. The class beneath this is the Vaishya. These people often work in the commercial sector as merchants. The fourth class level is the Shudra. Shudras typically work as unskilled labourers doing factory or farm work, or they may also be employed as artists. There is another group, the Harijan, that is at the bottom and considered to be outside of the caste system. For many years, they were known as Untouchables, people from this caste held the most undesirable jobs in society, such as cleaning up garbage. Furthermore, they weren‟t allowed to pray at public temples or drink water from the same wells as other classes. If someone from another caste came into contact with an Untouchable, they were considered dirty and would be expected to bathe vigorously to clean themselves. Although the caste system still exists in India, the government is taking steps to improve the living conditions and decrease unemployment rates for the Shudras and Harijan. This includes providing better health care, offering literacy programmes, and making sure that people from higher social classes do not exploit them. It seems unlikely that the caste system will disappear any time soon, but the overall conditions for those at the bottom do seem to be improving. Question:What does the passage suggest about the future of the caste system?

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions from 17 to 18.S. Mayo Hospital in New Orleans was so named in recognition of Dr Mayo's outstanding humanitarianism. 

Tiếng Anh Tốt nghiệp THPT
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Ôn luyện hóa hữu cơ 12 cực hay có lời giải (Đề số 14)

Chất  nào không phải là polime :

Hóa học Lớp 12
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 5)

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 from 15 to 16. 

Tiếng Anh Tốt nghiệp THPT
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