Moving parts of machines and motor vehicles have to be _____ regularly to reduce friction.

[问答题]There is a large amount of energy wasted due to friction.

[单选题]Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to （）.A . react with insufficient speed droopB . fail to react to small speed changesC . have excessive sensitivity to small speed

[单选题]The main moving parts of a diesel engine consist of the （） and the pistons.A . bedplate, connecting rodsB . crankshaft, the connecting rodsC . frames, crossheadsD . crankshaft, the cylinder

[单选题]Washing machines made by China have won worldwide attention and Haier has becomepopular name.A． a; the B. /; a C. /; the D. the; a

[单选题]Washing machines made by China have won_______worldwide attention and Haier has become_____popular name.A． a; the B. /; aC． /; the D. the; a

[单选题]URLs have three parts：the DNS name of machine on which the page is located，then a local name uniquely indicating the specific page andA．ProtocolB．IP addressC．Network nameD．Server name

[单选题]Supplying capital to companies that are just moving into operation, but do

[单选题]There’s the fear that parents might clone a child to have “spare parts” ___

[试题](ii) vehicles. (3 marks)

[名词解释] Motor