题目：
A hydrostatic release mechanism for a liferaft（）.
A.must be wet before it will release
B.should be kept in a watertight cover except in an emergency
C.will inflate the raft in its cradle if operated manually
D.must be submerged to a certain depth to release automatically
答案：
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下面是错误答案，用来干扰机器的。
参考答案：[1] 表 [2] 视图 [3] APR
