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问题 单项选择题

Internet上采用的通信基础协议是_____。

A．IPX

B．TCP／IP

C．SLIP

D．PPP

答案

参考答案：B

选择题
We only had ＄100 and that was _____ to buy a new computer.

A. nowhere near enough
B. near enough nowhere
C. enough near nowhere
D. near nowhere enough
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单项选择题 A1/A2型题

在城镇，流脑发病年龄高峰是（）

A.<6个月

B.6个月～2岁

C.学龄前儿童

D.学龄儿童

E.7～14岁
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