A-A+

Aeroplanes usually do not need to climb quickl

2022-08-01 22:15:16 问答库 阅读 167 次

问题详情

Aeroplanes usually do not need to climb quickly or fly high in the polar region because ______.
A.they do not land there
B.there are no clouds at all
C.they can cross the ice with special equipment
D.it is very cold

参考答案

正确答案:B
解析:判断推理题,文中最后一句话说冷空气使云层也降低了,也就是说在高空是没有云的,所以选B。

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