下列容器中不可用于存放氯化镁的是（）。 A.铝制容器 B.铁制容器 C.陶瓷容器 D

Everybody in my family believes that my sister is equal _____ our old sick grandmother but I hold the

opposite opinion.   [ ]

A. to take care of  

B. to taking care of  

C. with taking care of 

D. taking care of  

画出电动机的机械特性，并指出几个特殊点。

药皮的主要作用有（）。

A．改善焊接工艺性能

B．使电弧稳定燃烧、飞溅少，焊缝成形好

C．节约焊丝用量

D．提高焊缝金属的力学性能

An analyst does research about alternative investments. With respect to alternative investments, a long time horizon and intense investor participation are most likely to be required for successful investing in both :

A. hedge funds and exchange traded funds.
B. venture capital and distressed securities.
C. commodities and commodity derivatives.

鳞状细胞癌（）

A．癌珠

B．印戒状细胞

C．R-S细胞

D．AFP阳性