— Would you mind ______ my pet dog while

I was told that there were about 50 foreign students ________ Chinese in the school, most ________ were from Germany.

A．study; of whom

B．study; of them

C．studying; of them

D．studying; of whom

下列哪个关节不属于腕部的关节：（）

A.腕掌关节

B.桡腕关节

C.掌指关节

D.下尺桡关节

E.腕骨间关节

由于生殖细胞中染色体数目是体细胞的一半，所以子代的染色体数目比亲代要少一半．______．

企业发展战略决定了组织结构的不同模式，与项目中心的经营活动相适应的是（）组织结构。

A.事业部制

B.直线职能制

C.矩阵制

D.多维立体式