1、The oldest kind of computer is the abacus used in China since the sixth century.In the seventeenth century an adding machine was invented,but the furst large,modern computer was built in 1937.A few years later a computer could do 5000 additions per second.Now thecomputations are so fast that they ar
2、e measured in nanoseconds毫( 微秒).Today most computers have a memory.They are getting smaller and smaller,and computing faster and faster.Even in a large computer,the part that does the actual computing is about the size of the end of a finger.Computers can do all kinds of work.When someone buys somet
3、hing in a department store,information about the sale goes into a computer,A scientist can talk to the computer about the rocks,and the computer answers the questions.A doctor can talk to the computer and explain what is wrong with a patient.If the doctor asks why,the computer goes through its store
4、d information and explains exactly why.When early humans began farming,it was a revolutionary change in human life.It was hundreds of thousands of years later that people developed a writing system( 方 法 ).In less than fifty years people have developed computers that can do most of the things humans
5、can do .This could be a frightening development.1. The computer is considered a wonderful machine because .A. it has effect on all aspects of mans lifeB.it is widely used in education and medicineC.it has the function of an engineD.it is useful even in distant villages2. The abacus has been used in
6、China for .A. some 5,000 yearsB.about 600 yearsC.nearly 1,000 yearsD.over 1,300 years 3.The most important feature of a computer is that .A.it has a memoryB.it is small in sizeC.it computes fastD.it answers all kinds of questions1444. The computations of the computer are usually measured in .A. seco
7、ndsB.minutesC.hoursD.nanoseconds5. The computer will soon affect .A. people in large citiesB.people in developed countriesC.people all over the worldD.people in the Western worldPassage 2In the traditional marriage,the man worked at a job to earn money for the family.Most men worked in an office,a f
8、actory,or some other place away from the home.Since the man earned the money,he paid the bills.The money was used for food,clothes,a house,and other family needs.Theman made most of the decisions.He was the boss.In the traditional marriage,the woman seldom worked away from the house.She stayed at ho
9、me to care for the children and her husband.She cooked the meals,cleaned house,washed the clothes,and did other household work.Her job at home was every important.In recent years,many couples continue to have a traditional relationship of this kind.The man has a job and earns the money for the famil
10、y.The woman stays at home and cares for the children and the house.Many Americans are happy withthis kind of marriage.But some other Americans have a different impression of marriage and family responsibilities.There are two important differences in male and female roles now.One is that both men and
11、 women have many more choices.They may choose to marry or to stay single.They may choose to work or stay at home.Both men and women may choose roles that are comfortable for them.A second difference in male and female roles is that within marriage many decisionsand responsibilities are shared.The hu
12、sband and wife may choose to have children,or they may not.If they have children,the man may take care of them some of the time, all of the time,or not at all.The woman may want to stay at home and take care of the children.Or she may want to go to work.Men and Women now decide these things together
13、 in a marriage.Many married people now share these decisions and the responsibilities of their families.6. Which of the following is NOT true in the traditional marriage?A. Men worked at a job to earn money for family.B. The woman made most of decisions.C. The woman stayed at home to care for the ch
14、ildren.D. The man paid the bills.7. In recent years .A. young couples reject the traditional relationshipB. the woman has a job and earns the money for the familyC. the woman doesnt stay at home and care for the children and the houseD. the role of men and women has begun to change8. Men and women may now choose all the following EXCEPT to .A. marry or to stay singleB. work or to stay at homeC. have the roles that are comfortable for themD. leave their jobs just because they have children 9.The following are all now true EXCEPT
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