客船上的所有动力滑动门，应能满足在船舶处于正浮位置时能从驾驶

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问题单项选择题

客船上的所有动力滑动门，应能满足在船舶处于正浮位置时能从驾驶台的控制台于不超过（）内被同时关闭。

A．30s

B．60s

C．90s

D．120s

答案

参考答案：B

选择题

-- Have you considered _____ your job as a teacher?

　 --- Yes. I like the job because a teacher is often considered _____ a gardener.

A．to change; to be

B．to change; being

C．changing; being

D．changing; to be

填空题

输电线路在输送容量相同的情况下，线路电压与输送距离成（）比。