（）采煤方法具有工序简单、掘进率低、产量大、效率高的特点。
A．炮采
B．普采
C．高档普采
D．综放
参考答案：D
读对话，排列顺序。
( ) Nice to meet you, too.
( ) Fine, thank you. Mr. Black, this is my teacher.
( ) Nice to meet you!
( ) Good morning, Miss Green. How are you?
