问题描述：
[单选]
Operating conditions in the crank chamber are very（）those in the cylinder．
A．the same as
B．similar to
C．separated from
D．different from
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答案解析：无
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答案解析：无
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上一篇：Piston No2 of main engine has been removed， and it will be（）by noon tomorrow．
下一篇：Opening of the cylinder（）will admit compressed air into the cylinder．
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