阅读理解

       Hello, I'm Lucy. I am from the USA. But now I'm in China. My teacher is Miss Chen. She is from

Tianjin. She is Chinese. I have a sister. Her name is Lily. She is in China , too.We are in the same school.

阅读短文，判断句子正(用“T”)误(用“F” )

( )1. Lily and Lucy are from Canada.

( )2. They are in China now.

(     )3. Miss Liu is their teacher.

( )4. Miss Chen is from Dalian.

( )5. Lily and I are students.

一台交换机具有12个10/100Mbps电端口和两个1000Mbps光端口，如果所有端口都工作在全双工状态，那么交换机总带宽应为______。

A．3.2Gbps
B．4.8Gbps
C．6.4Gbps
D．14Gbps