个人计算机属于______。

A．工作站

B．微型计算机

C．小型计算机

D．中型计算机

Seminiferous tubules contain all of the following components EXCEPT

A．Sertoli cells

B．Spermatocytes

C．A fibrous connective tissue tunic

D．Skeletal muscle in their tunica propria

E．A germinal epithelium