Why don’t all ice crystals in clouds immediately fall to the Earth? A. They are balanced by the pressure of rain droplets. B. The effect of gravity at high altitude is random. C. They ar

13 28/09/2024

Why don’t all ice crystals in clouds immediately fall to the Earth?

A. They are balanced by the pressure of rain droplets.

B. The effect of gravity at high altitude is random.

C. They are kept aloft by air currents.

D. The heat from the Sun’s rays melts them.

Trả lời

Tại sao tinh thể băng trong những đám mây không rơi xuống Trái Đất ngay lập tức?

A. Chúng được cân bằng bởi áp lực của những hạt mưa.

B. Ảnh hưởng của trọng lực ở độ cao so với mặt nước biển ngẫu nhiên.

C. Chúng bị giữ trong không trung bởi các luồng không khí.

D. Nhiệt từ các tia nắng mặt trời làm chúng tan chảy.

Dẫn chứng: Air currents move and lift droplets so that the net downward displacement is zero

=> Chọn C

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Xem tất cả

Why don’t all ice crystals in clouds immediately fall to the Earth? A. They are balanced by the pressure of rain droplets. B. The effect of gravity at high altitude is random. C. They ar

Trả lời

Câu hỏi cùng chủ đề

______ is over your head is just an exaggeration because you have well prepared for it over the years. A. This entrance exam B. What this entrance exam C. That this entrance exam D. It i

He built up a successful business but it was all done ______ of his health. A. at the price B. by the expense C. at all cost D. at the expense

If I weren’t afraid of travelling by air, I ______ to go to American by ship, which took me much longer time. A. I hadn’t had B. I wouldn’t have had C. I shouldn’t have had D. I wouldn’t h

There are ______ that not only governments but also individuals should join hand to tackle. A. too numerous environmental problems B. such a lot of environmental problems C. so fewer envir

______ irritating they are, you shouldn’t lose temper with small children. A. No matter how much B. As much as C. However D. Although

You should accept the Nokia mobile phone as a 16–birthday present from your parents delightedly. Don’t ______. A. look gift horse in the mouth B. buy it through the nose C. pull my leg D

Your sister has lost an awful lot of weight. She must have been on a diet, ______? A. mustn’t she B. needn’t she C. haven’t she D. hasn’t she

Just as you arrived, I ______ ready to go out. A. have got B. was getting C. would get D. have been getting

The press thought the sale manager would be depressed by his dismissal but he just ______. A. turned it down B. called it off C. spoke it out D. laughed it off

British Leyland is aiming to push ______ its share of UK car sale to 25% over the next two years. A. on B. up C. through D. out

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