可持续发展理论是以生态经济系统为分析对象,追求()。
A.生态效益最大化
B.经济效益最大化
C.生态经济效益最大化
D.人类需求最大化
参考答案:C
The charity sale our school organizes every year has taught us much that we would never have _____ learned in class.
A.therefore
B.meanwhile
C.otherwise
D.instead
行于脉中的气是()
A.元气
B.宗气
C.营气
D.卫气
E.经气