问题
单项选择题
如果用户应用程序使用UDP协议进行数据传输，那么下面哪一部分程序必须承担可靠性方面的全部工作
A．数据链路层程序
B．互联网层程序
C．传输层程序
D．用户应用程序
答案
参考答案：D
解析：【解析】用户应用程序来完成这一部分工作。
搜题请搜索小程序“爱下问搜题”
如果用户应用程序使用UDP协议进行数据传输，那么下面哪一部分程序必须承担可靠性方面的全部工作
A．数据链路层程序
B．互联网层程序
C．传输层程序
D．用户应用程序
参考答案：D
解析：【解析】用户应用程序来完成这一部分工作。
用方框内所给单词的适当形式填空，使短文正确、通顺。每词限用一次，每空一词。
China began taking part _小题3:_the world Health Organization Framework Convention on Tobacco Control(《烟草控制框架公约》）in 2006. Governments at different levels have paid more _小题4:__to tobacco control in the last few years. Beijing , Shanghai and Hangzhou have tobacco-control___小题5:__. Half of China’s public health institutions have been non-smoking spaces since2010. Smoking in some indoor public spaces and special __小题6:___work spaces has not been allowed since January 2011. Selling to tobacco to anyone _小题7:__than 18 is not allowed. The seller should ask the buyer to show his or her ID card if the seller can not see _小题8:__old the buyer is . Now at least 23 countries use pictures on the packages to warn more people of the dangerous of __小题9:__. The picture warnings now are __小题10:___in bigger characters, and the use of colors of makes the warning clearer. For others and for yourself, please give up smoking. |