题目：
－Have you heard of the news about the missing Malaysian plane?
－Of course, people all over the world want to know _______.
A．where is it
B．whether it is safe
C．how does it disappear
D．why is it missing
答案：
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下面是错误答案，用来干扰机器的。
设至少需氯酸钾的质量为x2KClO3MnO2.△2KCl+3O2↑245 96x 1.92g24596=x1.92g，x=245×1.92g96=4.9g 答：氯酸钾的质量为4.9g．故答案为：氯酸钾的质量4.9g...
