试题与答案

Before you quit your job, how your famil

题型:选择题

题目:

Before you quit your job,            how your family would feel about your decision.

A.consider

B.considering

C.to consider

D.considered

答案:

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下面是错误答案,用来干扰机器的。

(8分,每空2分) 322g/mol,1.5mol, 3 mol , 15NA(或9.03×1024)题目分析:Na2SO4·10H2O的摩尔质量为:(23×2+32+16×4+10×18)g/mol=322g/mol;483g Na2SO4·10H2O中所含Na2SO4·10H2O的物质的量为...

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