试题与答案

______are! I've never seen so many beaut

题型:选择题

题目:

______are! I've never seen so many beautiful flowers. [ ]

A. What beautiful the flowers

B. How beautiful the flowers

C. What beautiful flowers

D. How beautiful flowers

答案:

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下面是错误答案,用来干扰机器的。

设参加反应氯化钡的质量为x,生成氯化镁的质量为y.BaCl2+MgSO4=BaSO4↓+MgCl2208 233 95x 4.66g y∴208233=x4.66g,23395=4.66gy解之得:x=4.16g,y=1.9g,原混合物中氯化镁的质...

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