4、通常用來衡量一個(gè)國家石油化學(xué)工業(yè)發(fā)展水平標(biāo)志的是( )
A.石油的年產(chǎn)量 B.合成纖維的年產(chǎn)量
C.乙烯的年產(chǎn)量 D.硫酸的年產(chǎn)量
3、下列表示物質(zhì)結(jié)構(gòu)的化學(xué)用語正確的是 ( )
A.8個(gè)中子的碳原子的核素符號(hào):12C B.HF的電子式:
C.Cl-離子的結(jié)構(gòu)示意圖: D. CO2的結(jié)構(gòu)式:O=C=O
2、據(jù)報(bào)道,某些建筑材料會(huì)產(chǎn)生放射性同位素氡,從而對(duì)人體產(chǎn)生傷害,
該同位素原子的質(zhì)子數(shù)是( )
A.136 B.50 C.86 D.222
1、提出元素周期律并繪制了第一個(gè)元素周期表的科學(xué)家是(
A.戴維 B.阿伏加德羅 C.門捷列夫 D.道爾頓
5.(★★★★)She is wearing________.
A.a silk new green cap B.a new silk green cap
C.a cap of silk new green D.a new green silk cap
4.(★★★★★)Where have you been?We have been looking for you________.
A.these last all few days B.all few last these days
C.all these last few days D.these all few last days
3.(★★★★★)Yesterday we had a lecture given by a ________ teacher.
A.well-mannered,young school B.young,well-mannered,school
C.well-mannered,school young D.school well-mannered young
2.(★★★★★)The Greens live in a________ house.
A.big,white,two-story B.two-story,white,big
C.white,big,two-story D.white,two-story,big
1.(★★★★★)I’ll go to the supermarket with my grandfather.We are going to buy some________glasses.
A.French lovely old B.lovely old French
C.lovely French old D.old lovely French
3.實(shí)質(zhì)上多個(gè)形容詞的語序是與被修飾的名詞關(guān)系越密切的詞越靠近名詞。
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