问题描述：
[单选]
The cylinder covers and the liners are bolted together by means of studs（）the cylinder frames．
A．screwing into
B．being screw on
C．to screw on
D．screwed into
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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：The cylinder head， cylinder liner and（）form the combustion chamber．
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