题目内容

TCP、UDP协议属于OSI参考模型的哪一层（）。

A. 数据链路层
B. 网络层
C. 传输层
D. 物理层

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文件传送的FTP、电子邮件的SMTP、万维网应用的HTTP协议属于OSI参考模型的哪一层（）。

A. 表示层
B. 应用层
C. 传输层
D. 会话层

[音频]8.[音频]A)He’s got addicted to technology.B)He is not very good at socializing.C)He is crazy about text-messaging.D)He does not talk long on the phone.[音频]9. A)Talk big.B)Talk at length.C)Gossip a lot.D)Forget herself.10.[音频]A)He thought it was cool.B)He needed the practice.C)He wanted to stay connected with them.D)He had an urgent message to send.11.[音频]A)It poses a challenge to seniors.B)It saves both time and money.C)It is childish and unprofessional.D)It is cool and convenient.

[音频]12.[音频]A)He wants to change his job assignment.B)He is unhappy with his department manager.C)He thinks he deserves extra pay for overtime.D)He is often singled out for criticism by his boss.13.[音频]A)His workload was much too heavy.B)His immediate boss did not trust him.C)His colleagues often refused to cooperate.D)His salary was too low for his responsibility.14.[音频]A)He never knows how to refuse.B)He is always ready to help others.C)His boss has a lot of trust in him.D)His boss has no sense of fairness.15.[音频]A)Put all his complaints in writing.B)Wait and see what happens next.C)Learn to say no when necessary.D)Talk to his boss in person first.

从list1 = ["爱成都","迎大运","勇担当","追梦想"]这个列表中随机选取一个元素的函数是：

A. shuffle()
B. choice()
C. sample()
D. randrange()