汉语的虚语素多数是位臵固定的。

My uncle         the club in 2010.  He        the club for over 3 years.

A．joined; has been a member of

B．joined; has joined

C．has joined; has joined

D．has joined; has been in

财政性存款只能作为( )可支配的资金。

A．国有商业银行

B．股分制商业银行

C．政策性银行

D．中央银行

主产于云南的道地药材是

A．茯苓
B．人参
C．薄荷
D．附子
E．阿胶

下列哪项是龙生蛭胶囊的使药（）

A.黄芪、水蛭

B.桃仁、赤芍、红花、当归、川芎

C.桑寄生、刺五加、石菖蒲

D.木香、地龙

简述三角洲的发育过程.