A. expands
B. contrasts
C. contracts
D. compresses
They can do jobs no person can do,such as picking up change hot-|||-metal.-|||-R
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[单选题]The cooler as the liquid becomes, ().A . the faster it will evaporateB . the slower it will condenseC . the slower it will evaporateD . the faster it will flow
[单选题]The lube oil cooler is located after the lube oil filter in order for ()A . the filter to operate more efficientlyB . the lube oil cooler to be bypassedC . positive lube oil pump suction to be assuredD . galvanic action in the cooler to be minimized
[单选题]In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of ().A . oilB . sea waterC . airD . fresh water
[单选题]The main bearing metal is a lining ().A . inside the bearingB . outside the bearingC . covering the crankshaftD . none of the above
[单选题]Additives () protective layers on metal surfaces guarding them against corrosion.A . damageB . formC . dissolveD . contaminate
[多选题] 通常MMC(metal matrix composite)()A .采用高熔点、重金属作为基体。B .要比基体金属或合金的塑性与韧性差。C .要比基体金属或合金的工作温度高。D .要比基体金属或合金的弹性模量低。
[单选题]The metal sheet used to imitate thunder must be________.A.tightly fastened on all sidesB.lying flatC.both A and BD.neither A nor B
[名词解释] 热点 hot spot