Over the past 30 years, the average robot price _____ by half in real terms, and even further relative to labor costs. A. is fallen B. has fallen C. were fallen D. have fallen

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.Over the past 30 years, the average robot price _____ by half in real terms, and even further relative to labor costs. A. is fallen B. has fallen C. were fallen D. have...

LQ

Lê Quỳnh Anh

23 tháng 8 2017

#Mẫu giáo

1

DH

Dương Hoàn Anh

23 tháng 8 2017

Kiến thức: Thì trong tiếng Anh, hoà hợp chủ ngữ và động từ

Giải thích:

Ta dùng thì hiện tại hoàn thành diễn tả hành động bắt đầu trong quá khứ và kéo dài đến hiện tại. Cấu trúc thì hiện tại hoàn thành: S + have/has + PP +...

Chủ ngữ trong câu là danh từ không đếm được “price” nên ta dùng trợ động từ “has”

Tạm dịch: Trong 30 năm qua, giá robot trung bình đã giảm một nửa theo giá trị thực và thậm chí còn liên quan nhiều hơn đến chi phí lao động.

Chọn B

MH

Mai Hoa

31 tháng 5 2021

The cost of living has fallen considerably in the past month.

There has

" Could you guard against my handbag while I go to the toilet?"

She asked me

#Tiếng anh lớp 9

3

MN

Minh Nhân

31 tháng 5 2021

1. There has been a considerable fall in the cost of living in the past month.

2. She asked me to guard against her handbag while she went to the toilet.

Đúng(2)

TA

Trần Ái Linh

31 tháng 5 2021

She asked me if I could guard against her handbag while she went to the toilet.

SS

Sống sót

8 tháng 3 2017

A frog has fallen into ditch which is 13m deep. each day the frog jumps 2m and then falll back by 1m. in how many days will the frog reach the top of the ditch?

#Toán lớp 6

0

Y

Yuu~chan

28 tháng 8 2021

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...

#Tiếng anh lớp 9

1

DT

Đỗ Thanh Hải

CTVVIP

28 tháng 8 2021

6. When are the council going to do something about the city's traffic problems?
→It's high time ……………… the council did something about the city's traffic problems……………………………………………………………………....…..
7.The value of sterling has fallen considerably in the past week.
→There has……… been a considerable fall in the value of sterling in the past week.………………………………………………………..……………………………..
8. I would do anything for you
→There's …………nothing I wouldn't do for you………………………………………………………………………………………
9.I applied for the job but was turned down
→My ………application for the job was turned down…………………………………………………………………………………………….
10.There are more people out of work in this country than ever before.
→Never ……………have there been more people out of work in this country…………………………………………………………………………………….

Đúng(2)

PK

phạm khánh linh

31 tháng 8 2021

1 after the earthquake, the country needed a lot of .…equipment to look after the sick and wonded A depressed B medical C personal D financial 2 here is the…… news. Share prices on the Dow Jones Index have fallen dramatically A cheap B financial C wealthy D depressed

#Tiếng anh lớp 7

4

HP

Huy Phạm

31 tháng 8 2021

cách ra

Đúng(4)

TN

Tran Nguyen Linh Chi

31 tháng 8 2021

câu 1: b

câu 2:b

Đúng(2)

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 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

1

DH

Dương Hoàn Anh

27 tháng 12 2019

Đáp án A.

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...

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 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.

1

DH

Dương Hoàn Anh

19 tháng 3 2018

Đáp án C.

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...

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 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

1

DH

Dương Hoàn Anh

2 tháng 12 2017

Đáp án B.

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...

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 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.

1

DH

Dương Hoàn Anh

28 tháng 11 2019

Đáp án D.