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【单选题】
The marginal social benefit received from pollution is less than its marginal social cost in the market for highly polished glass. In this situation:A.
firms in the market produce the socially optimal level of pollution.
B.
society's well-being cannot be improved by changing the quantity of pollution.
C.
firms in the market produce too much pollution.
D.
firms in the market produce too little pollution.
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【简答题】第二类T形截面受弯构件正截面承载力计算的基本公式及适用条件是什么?为什么要规定适用条件?
【单选题】(真题2017-专51)口服补液盐中加入葡萄糖的主要作用是
A.
补充电解质
B.
降低血清钾浓度
C.
使口服补液盐具有一定的渗透压
D.
增加肠道对水钠吸收
E.
预防酮症酸中毒
【简答题】genotype,phenotype,testcross,backcross、dominant character,recessive character的中文含义是( )、( )、( )、( )、( )和 ( )
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