單項選擇題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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1.單項選擇題Pumps and fine filters are arranged () with one as standby.

A.in duplicate
B.in double
C.at twice
D.for two

2.單項選擇題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

5.單項選擇題Pistons may be made in () in order to keep the weight down for balancing purposes at high speed.

A.cast iron
B.forged steel
C.stainless steel
D.aluminum alloy