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【单选题】
以下关于局域网交换机工作原理的描述中，错误的是:A.
“端口号/MAC地址映射表”记录端口号与主机MAC地址对应关系
B.
局域网交换机实现多对端口之间帧的并发传输
C.
局域网交换机相当于互联网中的路由器
D.
局域网交换机利用集成电路交换芯片在多个端口之间同时建立多个虚连接
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反馈参考答案：
举一反三
【简答题】与鉴别细菌有关的代谢产物有( )和( )。
【单选题】— What does the newspaper say? — It's reported that a new airport _____ twenty miles from the city now. [ ]
A.
is being constructed
B.
is constructing
C.
has constructed
D.
was being constructed
【单选题】I don’t know if that’s true, but I’m going to ______ anyway.
A.
tell
B.
try
C.
tree
D.
treat
【单选题】听力原文：W: I can give you a ride-I'm going home this weekend anyway. M: Thanks. But let me give you some money for gas. Q: What does the man want to do? (18)
A.
Give the woman a ride home.
B.
Borrow the woman's car to get home.
C.
Take a different way home.
D.
Share the expense of the drive home.
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