题目内容
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A．The holders of brokerage accounts spend more time on newspapers than other people.
B．The Internet becomes a key part of media consumption by the brokerage account holders.
C．People between the age of 25 and 54 spend more time on TV than those in other ages.
D．The holders of brokerage accounts spend more time on the Internet than college students.
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B．The amount of food has something to do with health.
C．Health depends on diet totally.
D．Good food has nothing to do with health.
Disease can be one of the most powerful factors in checking population growth. In crowded conditions where many individuals of a species are living close together, the spread of pathogens(病原体)from one individual to another, occurs read fly. History shows many instances where human populations, crowded together in cities, have been almost wiped out by the rapid spread of disease. Modern orchard and forestry practice recognizes this fact and the close planting of trees of the same species is avoided. Mixed forests and orchards are the recognized procedure these days.
Apart from regulating population numbers in other species, disease has probably been the greatest factor in controlling the growth of the human population. In the mid-14th century, the Black Death wiped out 25 million people in Europe a lone, while as recently as 1918 over 21 million people died in a single year as a result of the influenza epidemic. The relative stability of the human population has been upset by advances in medical science. No longer does disease regulate human population growth in many parts of the world. Medical cures have prolonged life and upset the age structure of many populations, increasing the proportion of individuals in the reproductive age group.
The decrease in distribution and numbers of some species of native birds in New Zealand-the bellbird for example-has been attributed to disease rather than predation. Indeed, there are examples to show that disease has deliberately been used to control some animal populations. In Australia, for instance, the introduction of the myxomatosis(多发粘液瘤病) virus has drastically reduced the rabbit population in many areas, although increasing resistance to the disease is be coming apparent. Attempts to introduce myxomatosis into New Zealand as a means of rabbit population control have failed, mainly because the species of flea and mosquito that transmit the disease are absent in this country.
Research is currently being carried out to discover whether selected strains of virus can be used to control pathogenic bacteria that have developed a resistance to drugs. It is hoped that the virus will parasite(寄生于)and kill the bacteria without harming the organism that the bacteria has infected.
Why is the close planting of trees of the same species avoided in modern orchards and forests？
A．Because mixed forests and orchards are the recognized procedures these days.
B．Because trees of same species may cause the spread of disease.
C．Because modern orchards and forests are more specialized.
D．Because trees planted crowdedly do not have enough room to develop their roots.
B．He had other things to do first.
C．His foot had seemed not serious.
D．His injury had kept him at home.
A．Y
B．N
C．NG
听力原文： The first postal service in North America began in New England in the 17th century. All mail arriving in Massachusetts colony was sent to the home of appointed official in Boston. In turn, the mail would be delivered from Boston on horseback to its destination, receiving one penny for each good article of mail. Later in the century postal services were established between Philadelphia and Delaware. In 1691, the British crown appointed the first postmaster general to hare charge of the mail for all the colonies in North America. Later, Benjamin Franklin served as the postmaster general for the British government and then was made postmaster by the newly formed United States' postal systems on a permanent basis. He increased the number of post office, introduced the use of stagecoaches to carry mail, and started a package service system. They were used to carry mail into the towns. Some communities, especially those out west, were far from the services of transportation. To serve them, the post office developed a system called "star routes". Private contractors paid to deliver mail to the communities from railways by horse and wagon．The postal service, which was started 3 centuries ago, has developed into an extensive government service with post offices in every city，town, and village in the United States。
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A．The history of Benjamin Franklin.
B．The history of the U.S. mail.
C．The changes of writing letters.
D．The history of U.S.
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Coverage of accident, fires and disasters is a staple of news reporting, but not every individual is cut out to report this type of news. Inevitably, accident coverage equates with the coverage of human tragedy. It's tough enough to cover an apartment fire and watch as the burnt remains of children should be removed. It's even tougher to do it on a regular basis. That weighs heavily on even the toughest of individuals, and some otherwise terrific reporters discover that they just cannot handle continued exposure to tragedy. In most cases of this sort, it is helpful to remember that there's nothing you can do to help. Police and fire officials are trained in rescue and disaster-relief efforts; almost certainly, you are not.
On rare occasions, however, the reporter can become a part of the story. Does the newspaper photographer try to stop a woman, from jumping off a bridge to her death or does he photograph the plunge？ You are told by your editors, quite appropriately, not to become part of the story. On the other hand, isn't the saving of a life more important？ Such incidents place the reporter or photographer in an ethical dilemma. But even if this type of coverage is not your style, there's a good chance that sooner or later you will have to do it.
When that occurs, think dearly and set aside your emotions. Keen in mind that you have a duty to your readers, listeners or viewers to keep them informed. There is good mason for media interest in such events. For many years, surveys of news consumers have shown that accidents, fires and disasters rank with crime and government news near the top of items of reader interest. Those studies confirm what editors know spontaneously.
The job of the news media is to get information to the public as quickly and accurately as possible. The media also cover these events in their capacity as watchdog for the public over government agencies. In the police are slow in responding to an accident, is it because there are not enough officers or because they are poorly supervised？ To ask questions like this on behalf of the public, reporters must observe public officials as they perform. their duties.
The word "staple"(Line 1, Para.1) probably means"______".
A．big problem
B．tough job
C．important part
D．special item
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