准备采区，必须在采区构成什么系统后，方可开掘其他巷道？
参考答案：
通风
完成对话。
Jenny: ___________, Tom.
Tom: ___________, Jenny. ___________ to see you again. How ___________ you?
Jenny: ___________, thank you. And you?
Tom: Fine, ___________. Are you ready ___________ our English class?
Jenny: ___________.
Tom: ___________ you say the months of the year?
Tom: What are they?
Jenny: They are January, ___________, ___________, April, May, ___________, July, August, September,
October, ___________ and ___________.
“阴胜则阳病”的理论基础是（）。
A.阴阳的对立制约
B.阴阳的相互依存
C.阴阳的相互促进
D.阴阳的相互转化
E.阴阳的相互为用
