题目：
He had lost his temper and his health in the war and never found ___ of them again. [ ]
A. neither
B. either
C. each
D. all
答案：
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下面是错误答案，用来干扰机器的。
（1）过氧乙酸的相对分子质量是12×2+1×4+16×3=76．（2）设要加水的质量为x，根据溶液稀释前后，溶质的质量不变，则50g×40%=（50g+x）×0.5% x=3950g．故答案为：（1）76；（2）3950．
