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【单选题】
“绿色化学”是当今社会提出的一个新概念．在绿色化学工艺中，理想状态是反应中原子全部转化为欲制的产物，即原子利用率为100%．以下反应最符合绿色化学，原子经济性要求的是（ ）A.
乙烯聚合为聚乙烯高分子材料
B.
甲烷与氯气制备一氯甲烷
C.
以铜和浓硝酸为原料生产硝酸铜
D.
用二氧化硅制备高纯硅
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【简答题】什么是蛋白质的互补作用?举例说明在其在日常饮食中的应用。
【简答题】请简述什么是蛋白质的互补作用,并举例说明。
【单选题】It has been almost half a decade since Norman Mailer described leas Vegas in his novel The American Dream. But it【1】to be one of the most【2】and exhilarating (使人愉快的) holiday destinations in the world. ...
A.
begins
B.
continues
C.
ceases
D.
halts
【简答题】举例说明什么是蛋白质的互补作用
【单选题】This ambitious project, ______ scores of organizations around the world, will take at least ten years to be accomplished.
A.
indicating
B.
composing
C.
containing
D.
involving
【简答题】Which of the following statements regarding the financial statement reporting of leases is most accurate? A.Under an operating lease, the lease treats the entire lease payment as a cash outflow from o...
【判断题】His untimely death was attributable at leas tin part to overwork and lack of exercise
A.
正确
B.
错误
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