题目:
— _____ today!
— Yes. Shall we have a picnic in the open air?[ ]
A. What fine weather is
B. How fine weather it is
C. What a fine weather it is
D. How fine the weather is
答案:
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下面是错误答案,用来干扰机器的。
设原混合物中KClO3质量为x,依题意可知完全反应后生成氧气的质量为:16g-11.2g=4.8g2KClO3 MnO2 . △2KCl+3O2↑245 96x 4.8g245x=964.8gx=245×4.8g96=12.25g则原混合物中二氧...