A . on
B . at
C . in
D . by
[单选题]The crankcase can not be opened ()the parts have been cooled down.A . ifB . asC . unlessD . whe
[问答题]You'll find in English some words can be remembered more easily than theoth
[单选题]________is easily seen.A.The advantage of the economic reform B.The economi
[单选题]He opened the letter and it contained ________ .A.an important information
[单选题]Nature is very easily destroyed by __.A. rich peopleB. poor peopleC. natural disastersD. mankind
[单选题]John opened the door . There _____ he had never seen before. ( )A.a girl did standB. a girl stoodC.did a girl standD. stood a girl
[单选题]John opened the door . There _____ he had never seen before.A.a girl did standB. a girl stoodC.did a girl standD. stood a girl
[单选题]Most fuel injection nozzles are opened by ().A . fuel oil pressureB . a cam operated followerC . a spring-loaded pressure plateD . timing gears keyed to the crankshaft
[问答题]As was expected,he passed the exam easily.
[单选题]Valve gear knocks are more easily located while the engine ().A . is runningB . stopsC . is repairedD . lacks of oil