计算机专业英语第4次作业

计算机专业英语第4次作业1.Windows gives you more control over the__A___ your work.A：operationB：wayC：energyD：power2.Tea or coffee ? Which is your___A___?A：preferenceB：confusionC：puzzleD：mixture3.Programs that can destroy another computer's programs are called__D_.A：gamesB：computer languagesC：bugsD：viruses4.You were _C___ to us by our associates.A：toldB：suggestC：recommendedD：informed5.You should be able to tell the meaning of this word from its ___C____.A：companyB：conclusionC：contextD：communication6.___B___ refers to the parts of the computer that you can see and touch.A：SoftwareB：HardwareC：HardshipD：Instruction7.___C______that, I could do it much better.A：If I doB：If I were doC：Were I to doD：Were I do8.A network is a group of computers linked by communication lines .正确9.Most RAM is temporary, losing its contents when the computer's power is turned off.正确10.A program is a series of instruction that guides a computer through a process.正确11.写出下列术语的英文或中文意思。

1 message encryption 参考答案： 1 信息加密（术）2 客户机-服务器结构 2 client-server architecture3 关系数据库 3 relational database4 microwave radio 4 微波无线电5 digital television 5 数字电视12：[论述题]12.阅读下列短文，从A、B、C、D四个选项中，选出最佳选项。

For every man in the Civil War who died in battle, two or three men died of disease. Doctors of that time knew very little about causes of sickness or ways of preventing it. Thousands of men in poor health became soldiers. Hundreds of others had never had childhood diseases. Many of these soldiers could not withstand the epidemics of measles, mumps, and whooping cough that went through the camps.Army life was hard. Soldiers got few fruits or vegetables. There was no milk unless they happened to find a cow. Neither their clothes nor their shelters protected the troops from rain, snow, and cold. Sickness and disease were spread by insects, rats, and impure drinking water. Often the men drank straight from muddy streams. Gunshot wounds were serious, as in any war,but they did not cause as much death and suffering as disease did.1. Disease caused__________A.only a few deaths.B.Fewer deaths than wounds did.C. More deaths than wounds did.D.Both A and B2. Doctors at the time of the Civil War knew____________A.a lot about curing disease.B.Little about the causes of disease.C.Only how to prevent disease.D.Both A and C3. Men who were accepted as Civil War soldiers were___________A.known to have already had measles and mumps.B. Required to be in perfect healthC. Able to withstand epidemics easilyD.Sometimes in poor health4. Army life was hard on the troops because____________A.they were not sheltered from the coldB.they had no warm clothing.C.Their diets lacked good, healthful foodD.All of the above5. The best title for this selection is__________A. Disease.B. The Greatest DangerC.Insects, Rats, and Gunshot WoundsD. The History of Epidemics Passage 2Can you imagine ice that does not melt and is not wet? Have you ever heard of dry ice? Dry ice is made by freezing a gas. It is quite different from ordinary ice, which is simply frozen water.Dry ice was first manufactured in 1925.It has since fulfilled the hopes of its inventor. It can be used for making artificial fog in the movies. When steam is passed over dry ice, a very dense vapor rises. It can also be used for destroying insects in grain supplies. It is more practical than ordinary ice because it takes less space and is 142 degrees colder. Since it turns into steam instead of melting into water, it is cleaner to use. For these reasons it is extremely popular, and many people prefer it to ordinary ice.Dry ice is so cold that, if you touch it with your bare fingers, in will burn you.6. When was dry ice was first made ?A.1925B.1920C.1924D.19237.What is ice made of ?A. ChemicalsB. VaporC. WaterD. Gas8.How is an artificial fog made in the movies ?A. by passing steam over dry iceB. by turning ordinary ice into steamC. by heating dry iceD. by mixing dry ice with ordinary ice.9.What is the advantages of dry ice over ordinary ice ?A. It takes a longer time to meltB. It is cleaner to useC. It is not so cold as ordinary iceD. It is colder as ordinary ice10. According to the passage, which of the following statement is true ?A. dry ice is made of vaporB. Dry ice is not able to burn you.C. dry ice is not so cold as ordinary iceD. dry ice is colder than 142 degree.参考答案：1-5CBDDB 6-10 ADABC13：[论述题]13.请将下列英语句子翻译成汉语，要求内容忠实原文，语句通顺，逻辑清楚，表达正确。

1.To be part of the Internet a computer must have a unique Internet Protocol (IP) network address so that messages can be correctly routed to and from the machine over the Internet. Internet addresses are called URLs(Uniform Resource Locators).2.The amount of data that a computer network can transmit is called the bandwidth of the network and is usually measured in kilobits per second (Kbps) or megabitsper second (Mbps).3.Disgruntled employees sometimes attempt to destroy computers, programs, or files. In recent years, computer viruses have gained wide notoriety. Viruses are programs that "migrate” through networks and operating systems and attach themselves to different programs and databases.参考答案：1.作为互联网的一部分，一台计算机必须有一个单独的互联网协议（IP）网络地址，以便使信息通过正确的路由从计算机发送到互联网上。