问题 单项选择题

在p报头中, ______用来表示该数据报对应的IP协议版本号。

A.数据区

B.服务类型

C.协议域

D.版本域

答案

参考答案:D

解析:[知识点] IP数据报[评析] IP数据报的格式可以分为报头区和数据区两大部分。在IP报头中,版本域表示与该数据报对应的IP协议版本号,不同IP协议版本规定的数据报格式稍有不同。

选择题
阅读理解

阅读理解。

Here is some information about several famous local bakeries(面包房) in Indiana, the US. They serve as

a social gathering place for locals.

Maple Lane Bakery

At 8260 S. State Rd. Claypool, IN. (574) 566-2917, it offers a variety of cooked pies, cookies, and

bread. With 20 years' experience Maple Lane Bakery has specialized in the making of pies. The menu

includes peach pie $7.19, berry pie $ 7.70, apple pie $7.19 and banana pie $6.99. Feel free to place an

order at least 24 hours in advance.

Betty's cakes & Candy Shop

At 816 E. Winona Avenue Warsaw, IN. (574) 269-1231, it specializes in cakes and offers cookies and

candies. The chocolate cookies are sold at $ 8.99 a dozen. Betty's cakes & Candy Shop, started half a

century ago, specializes in wedding cakes and birthday cakes. Buying a cake from Betty's will not

disappoint you as they are always excellent.

Crepes' Quality Bakery

At 217S. Cavin Street Ligonier, IN.(260) 894-3024, this third generation bakery is located downtown

Ligonier. It offers cookies and cupcakes, and specializes in rolls and bread. If you plan to buy cookies for

the office or work area, you had better get there early as the building workers arrive just before 5:00 am

waiting for the doors to open.

Olympia Candy Kitchen

At 136N. Main Street Goshen, IN. (574) 533-5040, it has been welcoming visitors for almost a century

in its unchanged location in downtown Goshen, Indiana. Its tradition began in 1912 when Greek Nicholas began making his own chocolates. Today this family-owned operation offers all kinds of candies and

boxed candies. If you need an order, you should call ahead of time to see if they can meet your request.

1. Which of the following pies is the most expensive?

A. Berry pie.

B. Banana pie.

C. Apple pie.

D. Peach pie.

2. If you want to order a birthday cake, you are advised to call ______.

A. (574) 566-2917

B. (574) 533-5040

C. (260) 894-3024

D. (574) 269-1231

3. Which of the following bakeries has the shortest history?

A. Olympia Candy Kitchen

B. Crepes' Quality Bakery

C. Maple Lane Bakery

D. Betty's cakes & Candy Shop

4. The author wrote this passage mainly to ______.

A. warn customers to order bakeries in advance

B. make the bakeries better known to readers

C. tell readers some travel information

D. persuade more people to eat pies