單項(xiàng)選擇題

Put in the engine turning gear Now examine thoroughly inside the crankcase to （） that everything is correct.

A.make sure
B.be sure
C.assure
D.believe

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Pumps and fine filters are arranged （） with one as standby.

A.in duplicate
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Please draw out a 0l mm shim between the two halves of the bearing （） the clearance.

A.to reduce
B.to increase
C.and reduce
D.and increase