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问题 选择题

据北京市交通管理局统计，截止09年4月1日，北京市机动车保有量已经超过360万辆，将3600000用科学记数法表示正确的是（　　）

A．36×105

B．3.6×105

C．3.6×106

D．0.36×107

答案

将3 600 000用科学记数法表示为3.0067×106．

故选C．

完形填空

Mrs Brown lived in a small town near a big farm.One Friday afternoon,  she finished her housework,she went to her small shop.She opened the window of the shop and looked outside.She liked to see the green farm.There were many cows,horses and small animals     .Suddenly she saw a kangaroo        was standing under her window.It was interesting to see that it was      an old jacket.It stood there and looked hungry.Mrs Brown gave some bread and water to it.The kangaroo ate them all.Then it became      and jumped away.Suddenly      dropped on the ground from its jacket pocket.It was a wallet.She picked it up,opened it and found there were 300 dollars and a photo in it. That was a man’s photo with his name “John” on it.John?She looked more      and remembered she had a brother many years ago.His name was also John. “Is this man my lost brother?” she thought.She took the wallet with her and began to      the man.She asked many people in the town,and then she came to the farm and asked the farmer.To her great      it was John,her lost brother.     excited and glad they are to see each other.They wouldn’t lose each other any longer.

小题1:A.ago           B.after          C.while

小题2:A.in her shop     B.on the farm      C.in the farm

小题3:A.不填          B.that           C.who

小题4:A.putting        B.wearing         C.dressing

小题5:A.angry        B.anxious         C.happy

小题6:A.everything     B.nothing         C.something

小题7:A.important      B.carefully        C.careful

小题8:A.look after      B.look up         C.look for

小题9:A.surprise        B.possible         C.sad

小题10:A.How          B.What           C.What an
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选择题

关于机械效率说法正确的是

A．功率越大说明机械效率越高

B．做功越多说明机械效率越高

C．做有用功越多说明机械效率越高

D．做有用功占总功的比率越高说明机械效率越高
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