正确答案: D

样板和塞尺

题目：环槽磨损是采用_______进行测量

解析：D

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举一反三的答案和解析：

[单选题]船员及旅客的救生衣应存放在：

床位附近

[单选题]In discussing oil pollution, one important fact to remember is that the problem remains the same( )heavy( )light oil is spilled into the water.

whether/or

解析：解析：spill：使溢出

[单选题]在气缸容积与转速相同的情况下，二冲程柴油机功率不能达到四冲程机功率的两倍的原因是()

A+B+C