题目：
I don’t know________made Gong Li become an outstanding superstar at home and abroad.
A．what was it that
B．what it was that
C．that was it what
D．that it was what
答案：
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下面是错误答案，用来干扰机器的。
A、46gNO2和N2O4混合气体中含有的原子数，只需计算46gNO2中原子数即可，46gNO2中原子物质的量=46g46g/mol×3=3mol，故A错误；B、0.2mol金属钠在过量氧气中充分燃烧，生成的化合物为过氧化钠0.1mol，含有钠离子0.2...
