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 高等继续教育 / 计算机统考
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68、FTP在OSI模型中属于________。
A.应用层
B.传输层和物理层
C.网络成和链路层
D.数据链路层
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  • 4、The dark smoke that comes out of stacks (大烟囱) or from a burning dump (垃圾) contains tiny bits of solid or liquid matter. The smoke also contains many gases, most of which cannot be seen. Altogether, they make up the serious problems of air pollution. In so many places it keeps us from seeing the sun, irritate (刺痛) our eyes, causes us to cough and makes us ill. Air pollution can spread from city to city. It even spreads from one country to another. Some northern European countries have had "black snow" from pollutants that have traveled through the air from other countries and have fallen with the snow. So air pollution is a global problem. It can kill babies, older people and those who have respiratory (呼吸) disease. In 1952, four thousands people die in one week as a result of a serious air pollution breakout in London. In 1948 in a small town of Pennsylvania, 20 people died in a four - day period of air pollution. As often found in cities, air pollution increases the risks of lung disease, such as bronchitis and asthma. Of course, smoking and other factors help to cause these illnesses, too, but these causes have increased greatly during recent years as air pollution has become worse.统考英语阅读理解
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  • 低O2对呼吸的调节途径是 A、 直接兴奋延髓吸气神经元 B、 直接兴奋呼吸调整中枢 C、 外周化学感受器所实现的反射性效应 D、 刺激中枢化学感受器,兴奋呼吸中枢 E、 直接刺激呼吸中枢生理学
  • 48、以下关于WinRAR的描述中,错误的是______。 A.使用 WinRAR 可以进行分卷压缩 B.使用 WinRAR 进行解压缩时,必须一次性解压缩压缩包中的所有文件,而不能解压缩其中的个别文件 C.使用 WinRAR 可以制作自解压的 EXE 文件 D.双击 RAR 压缩包打开 WinRAR 窗口后,一般可以直接双击其中的文件进行查看计算机统考
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