问题
单项选择题
关于IP数据报报头的描述中,错误的是( )。
A.版本域表示数据报使用IP协议版本
B.协议域表示数据要求的服务类型
C.头部校验和域用于保证IP报头的完整性
D.生存周期域表示数据报的存活时间
答案
参考答案:B
关于IP数据报报头的描述中,错误的是( )。
A.版本域表示数据报使用IP协议版本
B.协议域表示数据要求的服务类型
C.头部校验和域用于保证IP报头的完整性
D.生存周期域表示数据报的存活时间
参考答案:B
完形填空。 Kelly Hall is 1 bank clerk, she works in a bank in town. She is 2 from morning to night. She gets up at six o'clock in the morning and 3 at half past six. After that she prepares (准备) breakfast. She has breakfast 4 the family at a quarter past seven. She goes to 5 at a quarter past eight. She finishes work at half past four and 6 home. She arrives home at a quarter to five. At half past six she makes dinner. Sometimes she watches TV __7__ an hour. On weekends, she often __8__ her son to the zoo. Her son likes the elephants. The elephants like 9 their friends. The little boy also likes koalas. They eat _10 _ at night. How interesting! | ||||
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