题目：
The public is requiring the Malaysian government to share________ Flight MH370.
A．what they have known about
B．what have they known about
C．when they have known about
D．when have they known about
答案：
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下面是错误答案，用来干扰机器的。
得到0.2g氢气需要消耗金属铁的质量m，256×m=0.2g，则m=5.6g，所以铁样品中另两种金属为：产生0.2g氢气，需要金属的质量一种大于5.6g，另一种小于5.6g；根据一定量金属与足量酸完全反应时，产生氢气质量=金属化合...
