1 The/unacceptable /present study/city centre/level /the / air pollution / of / in / an/ reveals2. There/a/in / the/few/ past /been/ has / standard of living/increase/progressive/the/years/over3. The...

D

dhdw

11 tháng 12 2021

1 The/unacceptable /present study/city centre/level /the / air pollution / of / in / an/ reveals

2. There/a/in / the/few/ past /been/ has / standard of living/increase/progressive/the/years/over

3. The / comparison / are / with / tallest buildings / in / London / small / in / New York/ skyscrapers

#Tiếng anh lớp 9

0

DT

Dương Thanh Ngân

9 tháng 3 2021

The cost of living has been increasing considerbly in the past few years .(up)

#Tiếng anh lớp 9

1

MN

Minh Nhân

9 tháng 3 2021

The cost of living has been increasing considerbly in the past few years .(up)

=> The cost of living has been going up considerably in the past few weeks.

Đúng(1)

NT

Nguyễn Thị Thúy Diễm

12 tháng 12 2018

rewrite the following sentences using adjectives or adverbs showing degree of change 1 the school facilities have been improved a lot within the last three years ->there have been.............................................................. 2 there is a minor increase in the number of children going to school this year -> the number....................... 3 the number of nuclear families in the countryside has risen little by little -> the...

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#Tiếng anh thí điểm lớp 9

1

N

Nguyen

20 tháng 12 2018

1 the school facilities have been improved a lot within the last three years

->there have been dramatic improvements in the school facilities within the last three years.

2 there is a minor increase in the number of children going to school this year

-> the number of children going to school has a slightly increased.

3 the number of nuclear families in the countryside has risen little by little

-> the number of nuclear families in the countryside has a minor risen.

4 there has been quite a large reduction in the number of poor families in the countryside

->there has been a considerable reduction in the number of poor families in the countryside.

5 the number of students attending university in Vietnam has grown very much in recent years

-> there has been a significant increase in the number of students attending university in Vietnam, in recent years.

6 though the pace of life in the countryside has not changed as rapidly as in the city, the changes seem significant.

->in spite of the pace of life in the countryside has not changed as rapidly as in the city, the changes seem significant.

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L

lekhoi

5 tháng 3 2022

39. The raising level of air pollution has caused concern among _________________. (conserve)40. There have been many ________________in the field of electrical engineering. (innovate)41. The total energy __________________ in 2005 was over 150 million tons. (consume)42. The judge told him it was ..................................to drink and drive, and banned him for a year....

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#Tiếng anh lớp 9

1

NM

Nguyễn Minh Anh

5 tháng 3 2022

conservation

innovation

consumption

irresponsible

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LQ

Lê Quỳnh Anh

11 tháng 10 2017

An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known...

Đọc tiếp

An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

For which of the following reasons can natural pollutants play an important role in controlling air pollution ?

A. They function as part of a purification process

B. They occur in greater quantities than oher pollutants

C. They are less harmful to living beings than other pollutants

D. They have existed since the Earth developed

#Mẫu giáo

1

DH

Dương Hoàn Anh

11 tháng 10 2017

Đáp án A.

Key words: natural pollutants, controlling air pollution, nature.

Câu hỏi: Dưới những lí do sau, đâu là lí do để chất gây ô nhiễm giữ vai trò quan trọng trong kiểm soát ô nhiễm không khí?

Clue: “Many of the more important air pollutants … are found in nature…they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil”: Nhiều trong số các chất ô nhiễm không khí … được tìm thấy trong tự nhiên …chúng trở thành thành phần trong chu trình sinh địa. Các chất này có vai trò như một kế hoạch thanh lọc không khí bằng cách cho phép hợp chất di chuyển từ không khí sang nước hoặc đất.

Phân tích: Từ Clue có thể tóm tắt lại là các chất gây ô nhiễm trong tự nhiên trở thành các chất hóa học khác, chất hóa học này lại tạo quy trình thanh lọc này. Chọn đáp án A. They function as part of a purification process.

Các đáp án khác:

B. They occur in greater quantities than other pollutants: Các chất này hình thành với khối lượng lớn hơn các chất ô nhiễm khác – Không có thông tin.

C. They are less harmful to living beings than other pollutants: Các chất này ít gây hại đến các sinh vật sống hơn các chất ô nhiễm khác – Không có thông tin.

D. They have existed since the Earth developed: Chúng đã tồn tại kể từ khi Trái Đất hình thành – Không phải là một vai trò của ô nhiễm không khí.

Đúng(0)

LQ

Lê Quỳnh Anh

27 tháng 12 2019

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. The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new...

Đọc tiếp

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.

The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new lease of life. Suddenly, there are a lot of changes going on up there”.

Estimates of the death toll from urban smog have been steadily rising, so the new cleaner trend could have significant consequences for life expectancy in cities as well as for the planet itself. The sudden and unexpected reversal of several decades of worsening pollution extends from the air in city streets to the remotest mid-Pacific Ocean and Antarctica.

Among the pollutants which have begun to disappear from the atmosphere are carbon monoxide, from car exhaust and burning rain forests, and methane from the guts of cattle, paddy fields, and gas fields. Even carbon dioxide, the main gas behind global warning, has fallen slightly.

There are two theories about why pollution is disappearing. First that there is less pollution to start with due to laws to cut down urban smogs and acid rain starting to have a global impact. Second, that the planet may be becoming more efficient at cleaning up.

The main planetary clean-up agent is a chemical called hydroxyl. It is present throughout the atmosphere in tiny quantities and removes most pollutants from the air by oxidizing them. The amount of hydroxyl in the air has fallen by a quarter in 1980s. Now it may be reviving for two reasons: ironically, because the ozone hole has expanded, letting in more ultraviolet radiation into the lower atmosphere, where it manufactures hydroxyl. Then the stricter controls on vehicle exhausts in America and Europe may have cut global carbon monoxide emissions, thereby allowing more hydroxyl to clean up other pollutants.

Question: The word “purging” in line 2 is closest in meaning to __________.

A. refining

B. ridding

C. destroying

D. rising

#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

27 tháng 12 2019

Đáp án A.

Đúng(0)

LQ

Lê Quỳnh Anh

19 tháng 3 2018

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. The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new...

Đọc tiếp

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.

The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new lease of life. Suddenly, there are a lot of changes going on up there”.

Estimates of the death toll from urban smog have been steadily rising, so the new cleaner trend could have significant consequences for life expectancy in cities as well as for the planet itself. The sudden and unexpected reversal of several decades of worsening pollution extends from the air in city streets to the remotest mid-Pacific Ocean and Antarctica.

Among the pollutants which have begun to disappear from the atmosphere are carbon monoxide, from car exhaust and burning rain forests, and methane from the guts of cattle, paddy fields, and gas fields. Even carbon dioxide, the main gas behind global warning, has fallen slightly.

There are two theories about why pollution is disappearing. First that there is less pollution to start with due to laws to cut down urban smogs and acid rain starting to have a global impact. Second, that the planet may be becoming more efficient at cleaning up.

The main planetary clean-up agent is a chemical called hydroxyl. It is present throughout the atmosphere in tiny quantities and removes most pollutants from the air by oxidizing them. The amount of hydroxyl in the air has fallen by a quarter in 1980s. Now it may be reviving for two reasons: ironically, because the ozone hole has expanded, letting in more ultraviolet radiation into the lower atmosphere, where it manufactures hydroxyl. Then the stricter controls on vehicle exhausts in America and Europe may have cut global carbon monoxide emissions, thereby allowing more hydroxyl to clean up other pollutants.

Question: Based on information in the passage, all of the following information referring to hydroxyl is true EXCEPT __________.

A. oxidization of pollutants is carried out by hydroxyl.

B. ultraviolet radiation increases production of hydroxyl.

C. there is difficulty in destroying carbon dioxide by hydroxyl.

D. the reduction in the ozone layer is beneficial to hydroxyl.

#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

19 tháng 3 2018

Đáp án C.

Đúng(0)

LQ

Lê Quỳnh Anh

2 tháng 12 2017

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. The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new...

Đọc tiếp

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.

The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new lease of life. Suddenly, there are a lot of changes going on up there”.

Estimates of the death toll from urban smog have been steadily rising, so the new cleaner trend could have significant consequences for life expectancy in cities as well as for the planet itself. The sudden and unexpected reversal of several decades of worsening pollution extends from the air in city streets to the remotest mid-Pacific Ocean and Antarctica.

Among the pollutants which have begun to disappear from the atmosphere are carbon monoxide, from car exhaust and burning rain forests, and methane from the guts of cattle, paddy fields, and gas fields. Even carbon dioxide, the main gas behind global warning, has fallen slightly.

There are two theories about why pollution is disappearing. First that there is less pollution to start with due to laws to cut down urban smogs and acid rain starting to have a global impact. Second, that the planet may be becoming more efficient at cleaning up.

The main planetary clean-up agent is a chemical called hydroxyl. It is present throughout the atmosphere in tiny quantities and removes most pollutants from the air by oxidizing them. The amount of hydroxyl in the air has fallen by a quarter in 1980s. Now it may be reviving for two reasons: ironically, because the ozone hole has expanded, letting in more ultraviolet radiation into the lower atmosphere, where it manufactures hydroxyl. Then the stricter controls on vehicle exhausts in America and Europe may have cut global carbon monoxide emissions, thereby allowing more hydroxyl to clean up other pollutants.

Question: The word “it” in paragraph 5 refers to ______.

A. the ozone hole

B. clean-up agent

C. acid rain

D. urban smog

#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

2 tháng 12 2017

Đáp án B.

Đúng(0)

LQ

Lê Quỳnh Anh

27 tháng 11 2017

An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known...

Đọc tiếp

An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.

However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

According to the passage, human-generated air pollution in localized regions ________.

A. can be dawrfed by nature’s output of pollutants

B. can overwhelm the natural system that removes pollutants

C. will damage areas outside of the localized regions

D. will react harmfully with natural pollutants

#Mẫu giáo

1

DH

Dương Hoàn Anh

27 tháng 11 2017

Đáp án B.

Key words: human-generated, localized regions.

Câu hỏi: Theo bài khóa, đâu là ý đúng về các chất ô nhiễm không khí do con người gây ra ở các vùng chuyên môn hóa?

Clue: “In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles”: Ở những vùng như vậy, chất thải của con người quá nhiều và có thể tạm thời quá tải áp đảo chương trình thanh lọc tự nhiên của chu trình.

Phân tích: Chu trình được nói đến ở trên là chu trình thanh lọc nhằm loại bỏ khí ô nhiễm. Do đó, ta chọn đáp án B. can overwhelm the natural system that removes pollutants: có thể áp đảo hệ thống tự nhiên loại bỏ các chất gây ô nhiễm. Các đáp án khác không phù hợp:

A. can be dwarfed by nature’s output of pollutants: có thể bị làm ít đi bởi những chất gây ô nhiễm ngoài tự nhiên.

C. will damage areas outside of the localized regions: sẽ gây hại khu vực bên ngoài một nơi nhất định.

D. will react harmfully with natural pollutants: sẽ phản ứng gây hại đến những chất ô nhiễm tự nhiên.

Đúng(0)

LQ

Lê Quỳnh Anh

28 tháng 11 2019

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. The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new...

Đọc tiếp

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.

The air above our head is becoming cleaner. A breath of fresh air has been running right round the planet for the past five years. The planet is apparently purging itself of pollution. Paul Novell of the University of Colorado, the co-author of a report on this phenomenon says, “It seems as if the planet’s own cleaning service has suddenly got a new lease of life. Suddenly, there are a lot of changes going on up there”.

Estimates of the death toll from urban smog have been steadily rising, so the new cleaner trend could have significant consequences for life expectancy in cities as well as for the planet itself. The sudden and unexpected reversal of several decades of worsening pollution extends from the air in city streets to the remotest mid-Pacific Ocean and Antarctica.

Among the pollutants which have begun to disappear from the atmosphere are carbon monoxide, from car exhaust and burning rain forests, and methane from the guts of cattle, paddy fields, and gas fields. Even carbon dioxide, the main gas behind global warning, has fallen slightly.

There are two theories about why pollution is disappearing. First that there is less pollution to start with due to laws to cut down urban smogs and acid rain starting to have a global impact. Second, that the planet may be becoming more efficient at cleaning up.

The main planetary clean-up agent is a chemical called hydroxyl. It is present throughout the atmosphere in tiny quantities and removes most pollutants from the air by oxidizing them. The amount of hydroxyl in the air has fallen by a quarter in 1980s. Now it may be reviving for two reasons: ironically, because the ozone hole has expanded, letting in more ultraviolet radiation into the lower atmosphere, where it manufactures hydroxyl. Then the stricter controls on vehicle exhausts in America and Europe may have cut global carbon monoxide emissions, thereby allowing more hydroxyl to clean up other pollutants.

Question: The passage supports which of the following conclusion?

A. An expansion in hydroxyl has enlarged the ozone hole.

B. The decrease of methane has enabled ultraviolet radiation to enter the atmosphere.

C. The reduction in carbon dioxide has produced a cleaner atmosphere.

D. The beneficial effect of hydroxyl has aided the cleaning process.

#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

28 tháng 11 2019

Đáp án D.

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