机体发病的决定因素是（）
A.正气不足
B.邪气侵犯
C.正邪斗争
D.阴阳失调
E.饮食不洁
参考答案：A
如客人示意不再需要酒水时，可将客人桌上空的（）或（）撤去。
The investment policy statement is important to investors because:（）
A. it assures them that they will get the return they desire.
B. it helps them understand the risk-return tradeoff of their investment plan.
C. it helps investors understand financial markets.
