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...