下列哪些结构在电镜下为微绒毛组成（）。A.纤毛 B.纹状缘 C.基_爱下问搜题

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问题多项选择题

下列哪些结构在电镜下为微绒毛组成（）。

A.纤毛

B.纹状缘

C.基底纵纹

D.小肠绒毛

E.刷状缘

答案

参考答案：B, E

选择题

Each of the 400 people received from their boss____ gift —“Who moved my cheese?”—____ best-seller in the US—to understand how to deal with changes in their lives and work.

A．the; 不填

B．a; a

C．a; 不填

D．the; a

单项选择题

下面的地址中，属于单播地址的是______。

A．230.106.5.13

B．175.168.31.59/30

C．20.255.255.255

D．152.32.64.255/18