题目内容
（请给出正确答案）
A.low loading of that cylinder
B.faulty combustion in that cylinder
C.sluggish piston ring action
D.excessive piston cooling
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更多“Persistent knocking of one cyl…”相关的问题
_____, the engine must be stopped immediately.
A.Should knocking occur
B.If knocking occur
C.Should if knocking occurs
D.If occur knocking
I ______ on the door for ten minutes by now without an answer．
A．was knocking B．am knocking
C．had knocking D．have been knocking
A、try knocking
B、try to knock
C、to try knocking
D、to try to knock
A.knocking down
B. knocking back
C. knocking against
D. knocking over
A.knock; he
B.knocking; he
C.konck; it
D.knocking; it
I ______on the door for ten minutes now without an answer.
A．was knocking
B．am knocking
C．knocking
D．have been knocking
Who's knocking at the door？
A．Kate.
B．John.
C．Jim.
A.to knock; smashing
B.knocking; smashed
C.knocked; smashing
D.knocking; smashing
He ______ the bully in the chest, sending him knocking against the wall.
A．punched
B．slapped
C．tapped
D．stroke
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