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问题 单项选择题

若加水勤务面板打开，且飞机有电（）.

A.要在前乘务员面板上观察饮用水水量，必须按压INDON电门

B.马桶不能冲水

C.FAP和勤务面板上同时指示出饮用水箱水量

D.ECAM上出现备忘信息

答案

参考答案：C

单项选择题

When I was there, he was still working. He said that he (1) for the last two hours (2) that he was going to stop (3) . He added that if I had arrived ten minutes later, I (4) at home. When I mentioned that the house looked quite (5) , he said that the woman (6) usually cleaned it had been sick for some time and (7) for over a week. When I asked him (8) he did not do it himself, he said that he (9) to do so if Mrs. Jones did not come the (10) day.

[A] dirty [B] old [C] clean
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单项选择题

在爆炸性气体环境中的各种电气设备的选型应符合有关规定。请根据设计规范进行下列设备选型。

在爆炸性气体危险区域为2区的场所，低压断路器应选用的防爆结构类型为( )。

A．增安型

B．充油型

C．正压型

D．隔爆型
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