The life boat______in case it is necessary to take off the crew of the damaged ship.

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问题 The life boat______in case it is necessary to take off the crew of the damaged ship.

选项 A、has been put aside
B、has been put away
C、has been set aside
D、is standing by

答案D

解析 stand by"放在一旁待命使用";put aside"放在一边";put away"收藏起来";set aside"搁在一边"。
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