问题描述：
[单选]
The cylinders， with cooling jackets， are（）to the engine frame by eight tie rods．
A．screwed
B．welded
C．fastened
D．rotated
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答案解析：无
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上一篇：The design of（）is similar to that of the main bearing．
下一篇：The cylinder liners are made of（）and the cylinder surfaces are sometimes chromium-plated．
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