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14 tháng 2 2022

Đừng chơi bên ngoài vì cơn lốc xoáy đang đến

Đừng chơi bên ngoài vì cơn lốc xoáy đang đến.

3 tháng 1 2022

NO

28 tháng 12 2019

Đáp án: d

28 tháng 9 2017

Đáp án d

29 tháng 9 2023

No,never

 

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 36 to 42.Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.The pressure at the center of a tornado is usually 13 pounds per square...
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 from 36 to 42.

Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house, the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57, 600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the enormous inside pressure may cause the building to burst.

Unfortunately, heavy rain and hail often occur in thunderstorms that later produce tornadoes. So people frequently shut all windows to protect their property. This may cause far worse damage later. For the same reason, tornado cellars must have an air vent. Otherwise, the cellar door might be blown out when a tornado passes over it.

According to the passage, tornadoes can destroy buildings because the ________.

1
1 tháng 3 2017

Đáp án D

Thông tin trong bài “This explosion is caused by the low air pressure at the center of a tornado” à áp suất không khí ở bên trong một cơn lốc xoáy thấp hơn áp suất không khí ở bên trong tòa nhà.

 

18 tháng 4 2021

1.the (long) _length__ of the experiment is 20 minutes.

2. my aunt works as a (chemistry) ___chemist___ at a university.

3. pupils are very interested in outside class (act) _activities__.

4. some people play sport to be (health) __healthy__, not because they like it.

5. sometimes we are bored and (sleep) __sleepy___ with his long lectures.

6. when foreigners talk to him, he can speak english (easy) _easily___ with them.

7. i like the fried chicken in our school canteen: it's really (taste) __tasty__.

18 tháng 4 2021

giải thích

Câu 1 ở đây cần danh từ do đứng sau mạo từ the

Câu 2 : work as a + danh từ chỉ nghề nghiệp

Câu 3 ở đây cần danh từ do đứng sau interested in, đằng trước là outside class chỉ mang tính chất là tính từ bổ nghĩa cho nó

Câu 4 ở đây cần tính từ do đứng sau to be

Câu 5 ở đây cần tính từ do hiện tượng đồng dạng về từ loại

Câu 6 Ở đây cần trạng từ để bổ nghĩa cho động từ speak

Câu 7 cần tính từ do đứng sau to be

10 tháng 6 2023

1 length

2 chemist

3 activities

4 healthy

5 sleepy

6 easily

7 tasty

\(Errink \times Cream\)

10 tháng 6 2023

1.the (long) _length__ of the experiment is 20 minutes.

2. my aunt works as a (chemistry) ___chemist___ at a university.

3. pupils are very interested in outside class (act) _activities__.

4. some people play sport to be (health) __healthy__, not because they like it.

5. sometimes we are bored and (sleep) __sleepy___ with his long lectures.

6. when foreigners talk to him, he can speak english (easy) _easily___ with them.

7. i like the fried chicken in our school canteen: it's really (taste) __tasty__.

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 36 to 42.Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.The pressure at the center of a tornado is usually 13 pounds per square...
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 from 36 to 42.

Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house, the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57, 600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the enormous inside pressure may cause the building to burst.

Unfortunately, heavy rain and hail often occur in thunderstorms that later produce tornadoes. So people frequently shut all windows to protect their property. This may cause far worse damage later. For the same reason, tornado cellars must have an air vent. Otherwise, the cellar door might be blown out when a tornado passes over it.

Which of the following is the main topic of the passage?

1
17 tháng 9 2018

Đáp án D

Đoạn văn hầu như đề cập đến những tác hại cũng như những đặc điểm gây hại của lốc xoáy à đáp án D phù hợp nhất với nội dung của bài (chủ đề chính của đoạn văn là “Tại sao lốc xoáy lại gây ra những sự phá hủy nghiêm trọng”)

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 36 to 42.Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.The pressure at the center of a tornado is usually 13 pounds per square...
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 from 36 to 42.

Forces other than damaging winds are also at work inside tornadoes. Sometimes, as the writhing, twisting funnel passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house, the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57, 600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the enormous inside pressure may cause the building to burst.

Unfortunately, heavy rain and hail often occur in thunderstorms that later produce tornadoes. So people frequently shut all windows to protect their property. This may cause far worse damage later. For the same reason, tornado cellars must have an air vent. Otherwise, the cellar door might be blown out when a tornado passes over it.

According to the passage, what is the difference per square inch between the air pressure inside a building and the air pressure inside a tornado?

1
30 tháng 12 2018

Đáp án A

Thông tin được nhắc đến trực tiếp trong bài “The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much” à sự khác nhau giữa áp suất không khí ở trong một tòa nhà và ở trong một cơn lốc xoáy là 2 pound mỗi inch vuông.