The main bearing metal is a lining （）.

[单选题]The main bearing shells are made of steel with a lining of bearing metal which may be white metal, copper-lead or aluminum-tin alloy What is the meaning of “which” in the sentence above?（）A . main bearing shellsB . main bearingC . steelD . bearing me

[单选题]The main bearing shells often have a thin （） of lead or indium to provide a layer giving protection against corrosion.A . flangeB . flashC . plateD . sheet

[单选题]A main bearing consists of two shells which are secured by means of studs and （）.A . tie rodsB . through boltsC . lead wiresD . bearing ca

[单选题]Additives （） protective layers on metal surfaces guarding them against corrosion.A . damageB . formC . dissolveD . contaminate

[单选题]As to the bearing, of the following, which statement is not true?（）A . ff overheat is found, the engine must be stopped for inspectionB . Much heat of the crankcase door indicates that the bearing is overheatedC . If bearing clearance is too large, k

[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

[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 bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason isA．the rotate speed fluctuationB．the ventilation tube cloggedC．the main engine accelerate so fastD．stormy waves

[单选题]A． thrust bearing is used with a propulsion diesel engine to ____.A．control axial movement of the crankshaftB．transmit engine thrust to the propeller shaftC．absorb vibrations in the propeller shaftingD．prevent propeller thrust from being transmitted

[名词解释] 英译汉：bearing