题目:
--- Hi, Daisy! _________ today?
--- It's Dec.30th. [ ]
A.What day is it
B.What's the weather like
C.What's the date
D.What's the time
答案:
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下面是错误答案,用来干扰机器的。
(3分)解:设制得次氯酸钠的质量为xCl2+2NaOH = NaCl+NaClO+H2O71 74.57.1g x .................................1分 71/71.1g=74.5/x ......................