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A、When the warmer air meets with the cooler air. B、When the wind moves faster than 30 meters a second. C、When the seawater evapo
A、When the warmer air meets with the cooler air. B、When the wind moves faster than 30 meters a second. C、When the seawater evapo
admin
2017-06-27
25
问题
A bit of rain and wind in summer can be nice. But bad storms are quite different. Some of the worst storms are typhoons. Every year, about 80 typhoons hit different places around the world. [23]The strongest ones are usually around the Pacific Ocean and the South China Sea. Most of them happen in July, August and September. Why? When lots of seawater gets hot in the summer sun, it evaporates into the air. This makes the air hotter, too. When the air gets warm enough, it starts to move higher up into the sky. Then, cooler air around it rushes in to fill the space that is left. Once the air gets warmer, it starts to move more quickly, making wind. The wind goes in circles, and it keeps moving higher in the sky. The warmer the air gets, the quicker the wind moves. [24]And when the wind moves faster than 30 meters a second, a typhoon begins. A typhoon has two parts. [25]One is called the "eye". This is right in the middle of a typhoon and is calm. The eye of typhoon can be about 40 kilometers wide. In the eye, the wind does not move so fast, and there are not many clouds in the eye. The other part of a typhoon is the wall of clouds around the eye. This is where the strongest winds and hardest rains are. Typhoons are very dangerous. They blow away houses and cars. And they can also kill people! Typhoons’ hard rains are bad for farmers’ crops.
23. What does the speaker say about typhoons?
24. In what condition does a typhoon begin?
25. What do we learn about the "eye" of a typhoon?
选项
A、When the warmer air meets with the cooler air.
B、When the wind moves faster than 30 meters a second.
C、When the seawater evaporates into the air.
D、When the air gets warmer and warmer.
答案
B
解析
短文提到当风速大于30米/秒时,台风就开始了,故选B。
转载请注明原文地址:https://kaotiyun.com/show/sli7777K
0
大学英语四级
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