题目内容

“Double 11” is not the only shopping festival in China.

A. 对
B. 错

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路由器（Router）是一种典型的什么层设备？

A. 物理层
B. 数据链路层
C. 网络层
D. 传输层

路由器（Router）负责在网络层间传输什么？并确定网络上数据传送的是什么？

A. 数据帧、最佳路径。
B. 数据报文、最佳线路。
C. 数据分组、最佳线路。
D. 数据分组、最佳路径。

路由器（Router）是一种用来实现什么互联与什么互联的什么？

A. 异种网络，多个子网，连接设备。
B. 同种网络，单个子网，通信设备。
C. 同种网络，单个子网，连接设备。
D. 异种网络，多个子网，通信设备。

Listen and complete the conversation.[音频]Karen: Hello, Melly! I’ve just been to the organic greengrocer’s on the corner. They sell amazing fruit and vegetables!Melly: Oh! Really? How about the (1) _____? Is it expensive?Karen: Actually, they’re more expensive than the (2) _, but the quality makes it worthwhile. Look at this garlic! My meatloaf is going to tasteamazing!Melly: It smells nice, but I have so little time that I’ve started to do a lot of my foodshopping online. It’s (3) _!Karen: Is it much?Melly: Yes. Last night I bought a gallon of ketchup, loads of spices and a(n)(4) _ of meat for just 20 dollars.Karen: That does sound cheap, but I prefer to go to bricks-and-mortar(5) _______. I suppose it’s good to see the food before you buy it.