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When anyone opens a current account at a bank, he is lending the bank money. He may (1) the repayment of the money at any time, either (2) cash or by drawing a check in favor of another person. (3) , the banker-customer relationship is that of debtor and creditor who is (4) depending on whether the customer’s account is (5) credit or is overdrawn. But, in (6) to that basically simple concept, the bank and its customer (7) a large number of obligations to one another. Many of these obligations can give (8) to problems and complications but a bank customer, unlike, say, a buyer of goods, cannot complain that the law is (9) against him.The bank must (10) its customer’s instructions, and not those of anyone else. (11) , for example, a customer opens an account, he instructs the bank to debit his account only in (12) of checks drawn by himself. He gives the bank (13) of his signature, and there is a very firm rule that the bank has no right or (14) to pay out a customer’s money (15) a check on which its customer’s signature has been (16) It makes no difference that the forgery may have been a very (17) one: the bank must recognize its customer’s signature. For this reason there is no (18) to the customer in the practice, (19) by banks, of printing the customer’s name on his checks. If this (20) Forgery, it is the bank that will lose, not the customer. (254 words) 17()

A. delicate
B. skillful
C. unusual
D. unique

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Passage Three Space is a dangerous place, not only because of meteors but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 ream without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage--a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of reams. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far. We know from the passage that ()

A. exposure to even tiny amounts of radiation is fatal
B. the effect of exposure to radiation is slow in coming
C. radiation is avoidable in space exploration
D. astronauts in spacesuits needn’t worry about radiation damage

What Is Anthrax(炭疽)There’s been a lot of talk about anthrax on the news lately. Some people are worried that anthrax may be connected to terrorist attacks or that terrorists may spread the germ that (51) the disease. Federal officials and police are investigating this and taking (52) to protect us.In the meantime, it’s important not to panic over anthrax. The chances that you and your Family (53) at risk are very tiny. One of the ways you can feel better is to learn about anthrax. When you know what it is and (54) you can get it, it doesn’t seem quite as scary.So, what (55) is anthraxHere are the facts on anthrax:Anthrax is a bacterial infection caused by a germ Although it’s most common in farm (56) , like sheep, COWS, pigs, horses, and goats, there’s a very small chance that people can get it, too, Anthrax spores(孢子)(a version of the germ in a protective shell that can live in the soil for years)cause the disease. People may get anthrax if they are exposed to anthrax (57) But here’s the important part:just being exposed to these spores doesn’t mean that a person will get (58) .For a person to get sick, he would have to breathe in thousands of these spores all the way Into his (59) . Or he’d have to eat meat contaminated with anthrax or handle (60) that has anthrax spores This may sound scary,but even when a person comes (61) contact with the spores, it’s unlikely that he’ll get sick. (62) the bacteria do not get into the skin, digestive tract, or lung, the disease won’t develop. Anthrax is not spread from person to person the way the flu can spread from family member to (63) member or classmate to classmate Anthrax can almost always be successfully treated with antibiotics(抗生素). Anthrax is very rare. Until recently, anthrax wasn’t even talked about because it was so rare-and it still (64) !Even with all of the anthrax cases you are hearing about right now, a person’s chances of getting anthrax are about the (65) as they were before you heard about anthrax on the news very, very low 52()

A. measures
B. wavs
C. acts
D. deeds

[A] What route does HIV take after it enters the body to destroy the immune system[B] How and when did the long-standing belief concerning AIDS and HIV crop up[C] What is the most effective anti-HIV therapy[D] How does HIV subvert the immune system[E] In the absence of a vaccine, how can HIV be stopped[F] Why does AIDS predispose infected persons to certain types of cancer and infectionsIn the 20 years since the first cases of AIDS were detected, scientists say they have learned more about this viral disease than any other.Yet Peter Piot, who directs the United Nations AIDS program, and Stefano Vella of Rome, president of the International AIDS Society, and other experts say reviewing unanswered questions could prove useful as a measure of progress for AIDS and other diseases.Among the important broader scientific questions that remain:41. __________.A long-standing belief is that cancer cells constantly develop and are held in check by a healthy immune system. But AIDS has challenged that belief. People with AIDS are much more prone to certain cancers like non-Hodgkins lymphomas and Kaposi’s sarcoms, but not to breast, colon and lung, the most common cancers in the United States. This pattern suggests that an impaired immune system, at least the type that occurs in AIDS, does not allow common cancers to develop.42. __________.When HIV is transmitted sexually, the virus must cross a tissue barrier to enter the body. How that happens is still unclear. The virus might invade directly or be carried by a series of different kinds of cells.Eventually HIV travels through lymph vessels to lymph nodes and the rest of the lymph system. But what is not known is how the virus proceeds to destroy the body’s CD-4 cells that are needed to combat invading infectious agents.43. __________.Although HIV kills the immune cells sent to kill the virus, there is widespread variation in the rate at which HIV infected people become ill with AIDS. So scientists ask. Can the elements of the immune system responsible for that variability be identified If so, can they be used to stop progression to AIDS in infected individuals and possibly prevent infection in the first place44. __________.In theory, early treatment should offer the best chance of preserving immune function. But the new drugs do not completely eliminate HIV from the body so the medicines, which can have dangerous side effects, will have to be taken for a lifetime and perhaps changed to combat resistance. The new policy is expected to recommend that treatment be deferred until there are signs the immune system is weakening.Is a vaccine possibleThere is little question that an effective vaccine is crucial to controlling the epidemic. Yet only one has reached the stage of full testing, and there is wide controversy over the degree of protection it will provide. HIV strains that are transmitted in various areas of the world differ genetically. It is not known whether a vaccine derived from one type of HIV will confer protection against other types.45. __________.Without more incisive, focused behavioral research, prevention messages alone will not put an end to the global epidemic. 43

When anyone opens a current account at a bank, he is lending the bank money. He may (1) the repayment of the money at any time, either (2) cash or by drawing a check in favor of another person. (3) , the banker-customer relationship is that of debtor and creditor who is (4) depending on whether the customer’s account is (5) credit or is overdrawn. But, in (6) to that basically simple concept, the bank and its customer (7) a large number of obligations to one another. Many of these obligations can give (8) to problems and complications but a bank customer, unlike, say, a buyer of goods, cannot complain that the law is (9) against him.The bank must (10) its customer’s instructions, and not those of anyone else. (11) , for example, a customer opens an account, he instructs the bank to debit his account only in (12) of checks drawn by himself. He gives the bank (13) of his signature, and there is a very firm rule that the bank has no right or (14) to pay out a customer’s money (15) a check on which its customer’s signature has been (16) It makes no difference that the forgery may have been a very (17) one: the bank must recognize its customer’s signature. For this reason there is no (18) to the customer in the practice, (19) by banks, of printing the customer’s name on his checks. If this (20) Forgery, it is the bank that will lose, not the customer. (254 words) 1()

A. acquire
B. deposit
C. demand
D. derive

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