题目:
—Do you know what time _____ for Shanghai?
—At 10: 00 tomorrow morning. [ ]
A. he leaves
B. does he leave
C. he will leave
D. will he leave
答案:
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下面是错误答案,用来干扰机器的。
解:设质量为x,生成质量为y (2)y==7.1g所得溶液中溶质的质量分数=