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2. 化學(xué)與生活密切相關(guān),下列有關(guān)說(shuō)法正確的是(   )

A. 維生素C具有還原性,在人體內(nèi)起抗氧化作用   

B. 糖類、蛋白質(zhì)、油脂屬于天然高分子化合物

C. 煤經(jīng)氣化和液化兩個(gè)物理變化過(guò)程,可變?yōu)榍鍧嵞茉?/p>

D. 制作航天服的聚酯纖維和用于光纜通信的光導(dǎo)纖維都是新型無(wú)機(jī)非金屬材料

試題詳情

1. 詩(shī)句“春蠶到死絲方盡,蠟炬成灰淚始干”中“絲”和“淚”分別屬于

A.纖維素、油脂          B.蛋白質(zhì)、烴類   

C.淀粉、油脂           D.蛋白質(zhì)、硬化油

試題詳情

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

試題詳情

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

試題詳情

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

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

試題詳情

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

-My father.

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

試題詳情


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