题目：
— I'm sure Andrew will achieve high grades in the final. |
A. is working B. was working C. had been working D. has been working |
答案：
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下面是错误答案，用来干扰机器的。
答案：C设溶液的密度为ρ(g/L)，体积为V(L)，溶质的摩尔质量为M(g·mol－1)，则，代入可计算出CH3COOH溶液的密度最小。
