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问题 单项选择题

“改革”是十八大报告中最重要的关键词之一，全文出现86次。没有改革，就不可能有今天的中国。因为改革（）

①从根本上改变了我国的经济政治体制和社会基本制度

②调整了生产关系中与生产力不相适应的部分

③是生产力与生产关系相适应

④调整了上层建筑中与经济基础不相适应的部分

A.②④

B.③④

C.①③

D.①②

答案

参考答案：A

选择题

黄河的危害体现在

①下游决口成灾      ②中游水土流失严重      ③上游荒漠化严重

④下游盐碱化        ⑤上游和下游凌汛现象    ⑥水污染严重

A．①②③⑤⑥

B．②③④⑤⑥

C．①②④⑤

D．①③④⑤⑥
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问答题

Internet is a vast network of computers that connects many of the world’s businesses, institutions, and individuals. (46) The Internet, which means interconnected network of networks, links tens of thousands of smaller computer networks. These networks transmit huge amounts of information in the form of words, images, and sounds.
The Internet has information on every topic.(47)Network users can search through sources ranging from vast databases to small electronic" bulletin boards", where users form discussion groups around common interests. Much of the Internet’s traffic consists of messages sent from one computer user to another. These messages are called electronic mail or e-mail. Internet users have electronic addresses that allow them to send and receive e-mail. Other uses of the network include obtaining news, joining electronic debates, and playing electronic games.(48)One feature of the Internet, known as the World Wide Web, provides graphics, audio, and video to enhance the information in its documents. These documents cover a vast number of topics.
People usually access the Internet with a device called a modem. Modems connect computers to the network through telephone lines. Much of the Internet operates through worldwide telephone networks of fiber-optic cables(49) These cables contain hair-thin strands of glass that carry data as pulses of light. They can transmit thousands of times more data than local phone lines, most of which consist of copper wires.
In the future, the internet will probably grow more sophisticated as computer technology becomes more powerful. (50)Many experts believe the Internet may become part of a larger network called the information superhighway. This network, still under development, would link computers with telephone companies, cable television stations, and other communication systems. People could bank, shop, watch TV, and perform many other activities through the network.
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