会议通知的繁简程度，应视( )而定。A．会议内容与规模 B．会议的重要性大小 C．

莲藕的产品器官为（）

A.根茎

B.块茎

C.变态根

D.球茎

Daniel Blair recently joined an investment club with several of his coworkers. Members of the club are generally quite conservative and are unwilling to invest in debt securities with credit ratings below AA. New investments are always evaluated in the context of the overall portfolio. Based on the attributes of the investment club members, they will most likely pursue an investment strategy that:（）

A. attempts to reduce a portfolio’s standard deviation through diversification. 

B. seeks the lowest risk securities. 

C. tries to totally eliminate systematic risk.

与公孙穴相通的奇经是（）

A．冲脉

B．带脉

C．阴维脉

D．阴脉

E．任脉

简述矫治学生不良品行的方法。

柴油中小于300℃馏分含量对耗油量的影响很大，小于300℃馏分含量越（），则耗油量越（）。

A.少；大

B.少；小

C.多；大

D.多；小