霍乱弧菌培养基的pH通常为（） A.pH4.0～6.0 B.pH6.0～7.6 C._爱下问搜题

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问题单项选择题

霍乱弧菌培养基的pH通常为（）

A.pH4.0～6.0

B.pH6.0～7.6

C.pH7.2～7.6

D.pH8.8～9.0

E.pH9.0以上

答案

参考答案：D

选择题

It is believed that movies, also ________ motion pictures, were introduced into China near the end of the 19^th century.

A．to be called

B．to call

C．calling

D．called

问答题简答题

请简述TCP和UDP协议的区别？