Passage one

A . remains fully obliged B . has no obligation C . is not necessarily D . is exempted

A . special precautions to deal with heat B . engine room safety procedures such as earmuffs, safety glasses, work clothes C . emergency escapes D . the location of safety equipment around the shi

A . It needs not to be regularly replaced B . It is designed to protect from possible impact C . It is required to be worn on deck at all times by all ships D . fibreglass hardhat should not be used on board shi

A . It’s important to make clear the chain of command within the vessel B . It is primarily your own responsibility to look after your person safety C . The porthole is the first choice to escape when in emergency D . all cabins are fitted with a Survival at Sea Manual

A．To reduce the rate of babies born too early． B．To reduce the risk of low birth we]ight． C．To reduce fetal deaths in pregnant women infected with HIV． D．To increase the number of lymphocytes in mothers’blood．

<img src='https://img2.soutiyun.com/ask/uploadfile/2406001-2409000/180cfa2f9428ecd9ce7cef809b876023.jpg' />

Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition. Bad breath can happen whenever the normal flow of saliva (唾液) slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evil smelling gases, the worst of which is hydrogen sulfide (硫 化物). Mouth bacteria thrive in airless conditions. Oxygen rich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic “morning breath”. Alcohol hunger, too much talking, breathing through the mouth during exercise anything that dries the mouth produces bad breath. So can stress, though it’s not understood why. Some people’s breath turns sour every time they go on a job interview. Saliva flow gradually slows with age, which explains why the elderly have more bad breath trouble than younger people do. Babies, however, who make plenty of saliva and whose mouths contain relatively few bacteria have characteristically sweet breath. For most of us, the simple, dry mouth variety of bad breath is easily cured. Eating or drinking starts saliva and sweeps away many of the bacteria. Breakfast often stops morning breath. Those with chronic dry mouth find that it helps to keep gum, hard candy, or a bottle of water or juice around. Brushing the teeth wipes out dry mouth bad breath because it clears away many of the offending bacteria. Surprisingly, one thing that rarely works is mouthwash. The liquid can mask bad breath odor with its own smell, but the effect lasts no more than an hour. Some mouthwashes claim to kill the bacteria responsible for bad breath. The trouble is, they don’t necessarily reach all offending germs. Most bacteria are well protected from mouthwash under thick layers of mucus (粘液). If the mouthwash contains alcohol-as most do-it can intensify the problem by drying out the mouth. 第31题：The phrase “emanate from” in Paragraph 1 most probably means “________”. A) thrive on B) account for C) originate from D) descend from

In fact, there was hardly any activity or social event that could not be set to Music. Weddings, births, christening, funerals, picnics, parades-- 21 had their musical accompaniment. After the American Civil War (1860-1865), the Negroes had gained their freedom and were ready 22 a new type of music, 23 that would preserve their musical traditions but be fast and happy 24 their 25 freedom. They wanted something they could play as professional musicians for both black and white audiences. Jazz was the answer. It combined themes from Negro work songs, spirituals and blues, set to a fast beat, 26 the musicians improvising (即兴而作) as they went along, like the funeral marching bands. To be good, a musician had not only to remember his part but also 27 able to invent new variations on the spur (激励) of the moment. Jazz 28 the people, but popular 29 is changed many times in form, style, and tempo. Each change added something 30 . 21. A. which B. that C. all D. those

Write your answers in boxes 1-6 on your Answer Sheet. NOTE: you may use any answer more than once. A．nebula B．main sequence star C．red giant D．white dwarf E．black dwarf F．supernova G．neutron star H．black hole the Sun ______

A．knows little about B．is doubtful about C．is opposed to D．agrees with

A．To reduce the rate of babies born too early． B．To reduce the risk of low birth weight． C．To reduce fetal deaths in pregnant women infected with HIV． D．To increase the number of lymphocytes in mothers’b1ood．

A．A B．B C．C D．D

The fact the ordinary citizens are now starting to think seriously about the nation’s moral climate, says this ethics (伦理学) professor at the University of Chicago, is reason to hope that new ideas will come forward to improve it. But the challenge is not to be underestimated. Materialism and individualism in American society are the biggest obstacles. “The thought that ‘I’m in it for me’ has become deeply rooted in the national consciousness,” Ms. Elshtain says. Some of this can be attributed to the disintegration of traditional communities, in which neighbors looked out for one another, she says. With today’s greater mobility and with so many couples working, those bonds have been weakened, replaced by a greater emphasis on self. In a 1996 poll of Americans, loss of morality topped the list of the biggest problems facing the U.S. and Elshtain says the public is correct to sense that: Data show that Americans are struggling with problems unheard of in the 1950s, such as classroom violence and a high rate of births to unmarried mothers. The desire for a higher moral standard is not a lament (挽歌) for some nonexistent “golden age,” Elshtain says, nor is it a wishful (一厢情愿的) longing for a time that denied opportunities to women and minorities. Most people, in fact, favor the lessening of prejudice. Moral decline will not be reversed until people find ways to counter the materialism in society, she says. “Slowly, you recognize that the things that matter are those that cant’ be bought.” 第36题：Professor Elshtain is pleased to see that Americans ________. A) have adapted to a new set of moral standards B) are longing for the return of the good old days C) have realized the importance of material things D) are awakening to the lowering of their moral standards

A．it involves a change in one's behavior B．it keeps information for later use C．it warns people not to do things repeatedly D．it enables one to remember events that happened in the past

A．is often quoted in the work of other scientists B．is careful not to make a value judgment about the use of data C．is applauded by all distinguished experimentalists D．generates a novel and well-founded generalization 此题为多项选择题。

A．Both have involved plots. B．Both are condemned by modem critics. C．Both are forms of escapist fiction. D．Both demonstrate the triumph of right over wrong.

A．A B．B C．C D．D

A．A B．B C．C D．D

A．The boredom and frustration brought by unemployment. B．The poorness of living space and housing shortage. C．The stress and depression produced by sleeplessness. D．The worry about financial and economic situation.

A、Toxoplasma gondii causes people strange and deadly diseases. B、With certain infection the infectious disease cannot be cured completely. C、Human beings infected by toxoplasma gondii will have permanent brain damage. D、Toxoplasma gondii is harmful to human beings, but it does no harm to mice.