單項選擇題

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

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單項選擇題

The operation between two fuel injections is called a （）.

A.turning cycle
B.working cycle
C.working hour
D.working stroke

單項選擇題

The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.

A.to be kept
B.logged
C.changed
D.has remained