_____ismybook._____isn'tmybook._____herb_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

_____ is my book. _____ isn't my book. _____ her book. [ ]

A. This ; This ; That's

B. This ; That.; That's

C. That ; This ; That's

D. That ; That ; This's

答案

答案：B

单项选择题

选择素分子识别的配体是()

A．CD15s(sLex)

B．CD21

C．CD31

D．CD44

E．钙粘蛋白

判断题

UNIX和Linux操作系统均适合作网络服务器的基本平台。