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【单选题】
正断层是指断层的( )的现象A.
上盘相对向上运动
B.
下盘相对向下运动
C.
两错动
D.
上盘相对向下运动
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反馈参考答案：
举一反三
【单选题】In a medium speed diesel engine, a trunk type piston may be cooled by_______Ioil circulation though passages in the piston crown IIheat transfer through piston rings and liner wall
A.
I only
B.
II only
C.
either I or II
D.
neither I or II
【单选题】Trunk-type diesel engine pistons are most effectively cooled by heat_____.
A.
conducted through the engine block
B.
conducted to water cooled cylinder walls
C.
conducted through the piston crown
D.
loss to escaping exhaust gases
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