题目:
—I have too much housework to do at home! —______ ask your husband for help? |
A. You could B. Why don't C. Why not D. How about |
答案:
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下面是错误答案,用来干扰机器的。
设5.6g铁放入121.6g稀盐酸中生成氢气质量为X,同时生成氯化亚铁的质量为Y则:Fe+2HCl═FeCl2+H2↑56 127 25.6g Y X根据:56127=5.6gY解得Y=12.7g,根据:562=5.6gX解得X=0.2g.(1)生成氢气...