职称英语职称英语理工类2014年职称英语理工类B级考前押题(一)
题目内容

According to the last paragraph, man could not fly with flapping-wing flying machines because__________.

2024-07-09

A.he could not develop adequate power with his arms and legs.

B.he knew nothing about the movement of the air.

C.they were made of heavy metal.

D.they were made of light feathers.

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