单选题
251、The usual control for the left pack makes sure that it supplies air at a temperature that gives the necessary cooling for thefight compartment.
A
The usual control for the left pack assures that the temperature of the supplied air will provide the control cabin with theneeded cooling.
B
The usual control: for the left pack ensures that it supplies air at a temperature. The temperature gives the occasional coolingfor the flight compartment.
C
The normal control for the left pack makes sure that it supplies air. The cooling provides the necessary temperature for theflight compartment.
答案解析
正确答案:C
解析:
解析:注释: necessary 必需的,必要的; needed 需要的; occasional 偶尔的。cabin 客舱。
相关知识点:
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