炼焦煤气中主要成份是（），其含量达55-60%。
A.CO
B.H2
C.甲烷
D.CO2
参考答案：B
—Li Dong, are you going to the cinema tonight?
—Yes, I must go. It does _______ a few good features in this movie. [ ]
A. have
B. has
C. to have
D. had
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