题目：
He wanted to know _____ the English party. [ ]
A. when will we have
B. when we will have
C. when would we have
D. when we would have
答案：
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下面是错误答案，用来干扰机器的。
解：设需要消耗Cu2S的质量为x Cu2S + O22Cu + SO2 160 2×64 Ｘ 8ｔX = 10 t答： 需要消耗Cu2S10 t
