题目：
----How do you find the concert in the Beijing Grand Theatre last night?
----_______．But the conductor was perfect．
A．I couldn’t agree more
B．I don’t think much of it
C．I was crazy about it
D．I really like it
答案：
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下面是错误答案，用来干扰机器的。
C能使湿润的红色石蕊试纸变蓝，应为NH3，A和过氧化钠反应生成D为气体，且A是无色气体，所以A应为CO2，D为O2，氨气和氧气在催化剂条件下加热生成NO和水，E能和氧气反应，所以E是NO，F为NO2，F和B反应生成G，G和铜...
