0  426619  426627  426633  426637  426643  426645  426649  426655  426657  426663  426669  426673  426675  426679  426685  426687  426693  426697  426699  426703  426705  426709  426711  426713  426714  426715  426717  426718  426719  426721  426723  426727  426729  426733  426735  426739  426745  426747  426753  426757  426759  426763  426769  426775  426777  426783  426787  426789  426795  426799  426805  426813  447090 

2. 化学与生活密切相关,下列有关说法正确的是(   )

A. 维生素C具有还原性,在人体内起抗氧化作用   

B. 糖类、蛋白质、油脂属于天然高分子化合物

C. 煤经气化和液化两个物理变化过程,可变为清洁能源

D. 制作航天服的聚酯纤维和用于光缆通信的光导纤维都是新型无机非金属材料

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1. 诗句“春蚕到死丝方尽,蜡炬成灰泪始干”中“丝”和“泪”分别属于

A.纤维素、油脂          B.蛋白质、烃类   

C.淀粉、油脂           D.蛋白质、硬化油

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8.(★★★★★)Was it at the air battle on June 8,1994,________ was led by captain Johnson,________ that Peter lost his life?

A.when;that                           B.that;who

C.which;that                           D.which;when

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7.(★★★★)Did________ she was chosen made her very happy?

A.what             B.that              C.which                D.it

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6.(★★★★★)________the house Mr Zhang has been broken into?

A.When was it that                      B.When /Has

C.Has                                D.Had

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5.(★★★★★)Was it not until 1920________ regular radio broadcasts began?

A.while             B.which            C.that              D.since

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4.(★★★★)-Is ________ you want to say?

-Yes,________ that’s all I know.

A.all what;yet         B.which all;unless      C.that all;×          D.all that;so

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3.(★★★★★)Was it in the room________ Mr. John lived________the exhibition was held?

A.that;that           B.where;where        C.that;where         D.where;that

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2.(★★★★)Was it 8 o’clock________you heard someone________ at the door?

A.when;knocking      B.when;knock        C.that;knocking       D.that;knock

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1.(★★★★★)-Whom would you rather________ the car?

-My father.

A.have fix           B.have to fix         C.had fix            D.have to be fixed

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