The main bearing shells often have a thin （） of lead or indium to provide a layer giving protection against corrosion.

[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]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]The bearing shells depend on the accuracy of （） to held them in a truly circular shape.A . the gapB . the clearanceC . the boreD . the housing

[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]It saves time in the kitchen to have things you use a lot _______ easy reach.A． near B. upon C. within D. around

[主观题]30． Mrs Morgan often gets up at five thirty in the morning，

[主观题]She often_______(have) lunch at home．

[单选题]The main feeling these children have when they are at home by themselves is______.A． tirednessB． fearC． lonelinessD． freedom

[单选题]Young people often[congregate] in the main square in the evenings.A.congrat

[单选题]So involved with their computers( )that leaders at summer computer camps of