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單項(xiàng)選擇題

The outside diameter of the pipe is （） the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.

A.less than
B.greater than
C.equal to
D.twice larger than

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單項(xiàng)選擇題

The outside diameter of the pipe is （） the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.

A.less than
B.greater than
C.equal to
D.twice larger than

單項(xiàng)選擇題

The operation between two fuel injections is called a working cycle, which consists of a fixed sequence of eventsWhat does "which" mean in this sentence?（）

A.a working cycle
B.the operation
C.two fuel injections
D.events