题目内容

每一条跑道不一定要设置净空道或者停止道。

A. 对
B. 错

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净空道宽度与同它相联接的跑道的宽度相同。

A. 对
B. 错

升降带必须包含跑道和停止道（若停止道有）。

A. 对
B. 错

The atmosphere is as much a part of the earth as __its soils and the water of its takes, rivers and oceans.A. are

A. are
B. is
C. do
D. has

Our company is ___ of other makers of spare parts for the airplane.

A. in advance
B. ahead
C. abreact
D. in front