爆炸上限和爆炸下限的差值大于或者等于20%的介质称为易爆介质。

从方框内所给的句子中选择恰当的选项完成下面对话。

A. My favorite singer is John . B. How about you ? C. My favorite group is Twins . D. I love musicians who write their own songs . E. What kind of music do you like ? F. Me , too . G. Do you like loud and energetic music ?

A : Hi , Bill ! Are you listening to MP3 again ?
B : Yes, Tom.I’ll never be tired of it.
A: 小题1:______________________
B : I like music that I can sing along with.
A : 小题2:____________________________.
B : I prefer music that is quiet and gentle.
A : 小题3:____________________________.
B : Oh, John’s songs have great lyrics. By the way , which group is your favorite ?
A : 小题4:___________________. I prefer groups that can play different kinds of music.
B : 小题5:_____________________.I also like the Twins best. They take after each other. But they are not really twins.
A : Really ? Let’ s search the information on the Internet.