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的IP协议版本
B．协议域表示数据报要求的服务类型
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
搜题请搜索小程序“爱下问搜题”
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的IP协议版本
B．协议域表示数据报要求的服务类型
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
K.L. Rothey, 71, from the United States, a retired lawyer Rothey has given himself the Chinese name of Luqi or “roadside beggar(乞丐)”. In his eyes, beggars are doing important work collecting rubbish. What they do is not dirty. Littering the street is, he adds. Rothey first visited China in 1984 and soon he became interested in Chinese culture. Married to a Chinese calligrapher (书法家), he lived in Huangshi, Hubei Province. Many people know him because he often shows up in the street collecting rubbish. “Huangshi is my home so I hope it becomes cleaner and more beautiful,” says Rothey. He has also organized volunteers to collect rubbish in other cities, including Wuhan. Rothey says he’ll continue collecting rubbish, as long as he is able to. Jill Robinson, 50, from Britain, founder(创立者)and CEO of Animals Asia Foundation. She has been working for nearly 20 years to stop people from getting the bile（胆汁）from moon bears for use in traditional medicine. She began working for the International Fund for Animal Welfare in Hong Kong in the mid-1980s. A business trip to a bear farm in the mainland in 1993 changed her life. She saw so many moon bears killed by people. That made her cry. She said she would be back to set them free. In 1998, she set up the Animal Foundation. In July 2000, the foundation agreed to free 500 farmed moon bears. In 2002, the Moon Bear Rescue（救援）Center was set up in Chengdu, capital of Sichuan. Now, bear farms have been stopped in the area of two-thirds of China. “As much as we rescue them, they rescue us. These bears rescue us every single day and they teach us to be better people,” Robinson says. 任务：请阅读上面短文，根据短文内容完成下面表格中的有关信息。
| |||||||||||||||