古代哲学中，构成人体的本原物质是（）
A.天气
B.清气
C.阳气
D.阴气
E.精气
参考答案：E
---It’s 12 April today. Have they found any useful information about the plane's black box?
---Flight MH370? Yes, but it’s difficult to decide where the black box really is.
A．still
B．ever
C．yet
D．never
公园的主路横坡一般宜小于：（）
A.2%
B.3%
C.4%
D.5%
