单选题Messages can easily be sent from one operator to another as long as they share the same data store,A. haveB. typeC. emailD. store

单选题The children trembled with fear when they saw the policeman. A. wept B. cried C. ran D. shook

单选题During his whole life, even if he became a famous man, Nobel tried to avoid ______.A. publicB. probabilityC. publicityD. quarrel

单选题She has proved that she can be Urelied/U on in a crisis.

单选题He was one of the principal organizers of the association. A. planners B. employees C. actors D. recipients

单选题During the past ten years there have been dramatic changes in the international situation.

单选题She will be very pleased to meet you.

单选题Water Resource More than half of the water used for drinking, washing and irrigating comes from under the ground. This subterranean (地下的)water is known as groundwater. It is generally taken for granted that the groundwater drawn from wells is present every where and will always be available and clean and safe to drink. But experts are reporting that groundwater sources can dry up through overuse, or become contaminated as a result of pollution, poor sanitation (卫生)or salt water intrusion. This "invisible resource"—as groundwater was described by the United Nations for its 1998 observance (纪念)of World Day for Water—is slowly emerging in political, economic and personal affairs. With demand growing and supply presenting greater difficulties, groundwater is on the way to becoming a boom business. The World Bank estimates that the developing countries will require investments totaling $600 billion to repair and improve water systems. Of the investments that are actually made, a substantial amount will be devoted to extracting and piping groundwater, primarily for agricultural use and secondarily for industry and household consumption. With a trend towards privatization of public services, it can be expected that a growing portion of investments in water will come from the private sector; requirements that governments privatize water utilities are already being written into the terms of multilateral loans. One consequence of growing privatization may be that access to water will not be regraded as a right, but as a function of economic markets. Groundwater, which in its natural state is more protected than surface water, is the preferred source of drinking water for cities. But pressure is being placed on groundwater resources lying close to urban areas by exploding populations, as the portion of the world"s people residing in citied balloons from 31 percent in 1995 to a projected 50 percent in 2005. And there is also the pressure of dollars to purchase land lying above groundwater sources and to keep it in a natural state, in order to protect aquifers(蓄水层)from contamination. In the developing countries, where urban population growth is surpassing sewage systems, the problem of untreated human waste is extremely serious. Alongside the problems of public groundwater sources is the increased consumption of privately bottled water, most of which is named spring water, i.e. groundwater. Consumption of bottled water in the United States, for instance, has risen from virtually nil(零)in the 1950s to 843 million gallons in 1984 and 2.95 billion gallons in 1997. But drinking bottled water is not just a trend for the middle classes. In developing countries, water pipes rarely extend to the poorer neighbourhoods, and residents have no choice but to pay high prices for bottled water. Political leaders and analysts are talking more frequently about the possibility that increasing demand for precious groundwater will lead to cross—border conflicts, even wars. It is not easy to resolve disputes over the highest groundwater rights, since many aquifers and underground streams cross national borders; and a well drilled vertically within the boundaries of one country may very well be drawing water from the same aquifer, also chosen by a neighbouring nation. Inclined and even horizontal drilling further complicates this issue.

单选题The Badlands National Park was established in South Dakota to preserve this weirdly beautiful region.A. trulyB. strangelyC. exceedinglyD. impressively

单选题It needs hardly be said that a man who could ______ such treatment was a man of remarkable physical courage and moral strength.A. make the best ofB. catch up withC. get rid ofD. put up with

单选题Better Control of TB Seen If a Faster Cure Is Found The World Health Organization estimates that about one-third of all people are infected with bacteria that cause tuberculosis . Most times, the infection remains inactive. But each year about eight million people develop active cases of TB, usually in their (51) . Two million people die (52) it. The disease has (53) with the spread of AIDS and drug-resistant forms of tuberculosis. Current treatments take at least six months. People have to (54) a combination of several antibiotic drugs daily. But many people stop (55) they feel better. Doing that can (56) to an infection that resists treatment. Public health experts agree that a faster-acting cure for tuberculosis would be more effective. Now a study estimates just how (57) it might be. A professor of international health at Harvard University led the study. Joshua Salomon says a shorter treatment program would likely mean not just more patients (58) It would also mean (59) infectious patients who can pass on their infection to others. The researchers developed a mathematical model to examine the effects of a two-month treatment plan. They (60) the model with current TB conditions in Southeast Asia. The scientists found that a two-month treatment could prevent about twenty percent of new cases. And it might (61) about twenty-five percent of TB deaths. The model shows that these (62) would take place between two thousand twelve and two thousand thirty. That is, if a faster cure is developed and in wide use by two thousand twelve. The World Health Organization (63) the DOTS program in nineteen ninety. DOTS is Directly Observed Treatment, Short-course. Health workers watch tuberculosis patients take their daily pills to make (64) they continue treatment. Earlier this year, an international partnership of organizations announced a plan to expand the DOTS program. The ten-year plan also aims to finance research (65) new TB drugs. The four most common drugs used now are more than forty years old. The Global Alliance for TB Drug Development says its long-term goal is a treatment that could work in as few as ten doses.

单选题There are twenty boys all together in that class.A. after allB. above allC. in allD. over all

单选题The view from my bedroom window was absolutely spectacular .

单选题Old and Active It is well-known that life expectancy is longer in Japan than in most other countries. A (51) report also shows that Japan has the longest health expectancy in the world. A healthy long life is the result of the (52) in social environment. Scientists are trying to work (53) exactly what keeps elderly Japanese people so healthy, and whether there is a lesson to be (54) from their lifestyles for the rest of us. Should we (55) any changes to our eating habits, for instance, or go jogging each day before breakfast? Is there some secret (56) in the Japanese diet that is particularly (57) to the human body? Another factor (58) to the rapid population aging in Japan is a decline in birthrate. Although longer life should be celebrated, it is (59) considered a social problem. The number of older people had (60) in the last half century and that has increased pension and medical costs. The country could soon be (61) an economic problem, if there are so many old people to be looked (62) , and relatively few younger people working and paying taxes to support them. (63) the retirement age from 65 to 70 could be one solution to the problem. Work can give the elderly a (64) of responsibility and mission in life. It's important that the elderly play active (65) in the society and live in harmony with all generations.

单选题Drinking three cups of coffee a day

单选题In the latter case the {{U}}outcome{{/U}} can be serious indeed. A. result B. judgement C. decision D. event

单选题The Hammersmith Hospital in West London, home of the Royal Post-graduate Medical School has been the scene(发生地点) of many innovations in medicine. It is now home(中心地,根据地) to the most expensive and ambitious medical technology project ever in Britain, which this year will make the Hammersmith the world's first fully digital hospital. The paper-free office brought about by computerization and modern information technology is familiar to(为……所熟悉) many office workers today. It has taken longer for the same technology to be applied to medical imaging(医学影像学), because of the immense computing power and high cost o the equipment required. But now the Hammersmith is becoming the first hospital in which all imaging data-- X-rays, ultrasonic ,CT and MRI images--are stored not on cumbersome, inflammable films but as digital data on optical discs. The first consequence of this can be seen in the air-conditioned computer room in the new building, where two compact(坚实的,结实的) cabinets each about as tall as a man and 0.6m wide are ready to store every X-ray and scan made at the Hammersmith in the next 16 years on optical discs(光盘). Space saving is the most obvious but not the most important advantage of the digital h6spital. A consultant conducting a clinic with a workstation linked by fibre optics(光纤) to the data store has no need of cumbersome trolleys loaded with patients' X-rays. The new technology considerably reduces the exposure to ionizing (电离的) radiation needed to get pictures doctors need, corresponding to reducing the slight but inevitable health risk that come with repeated X-rays. X-rays record their images on fluorescent(荧光的) plates, lasers read off and store the data and the plates are wiped clean to use again. This requires less radiation than conventional(常规的) imaging. The ability to enhance imaging also reduces the need for extra exposures. Another advantage is that any stored image can be sent to any of the hospital's 138 workstations in four seconds(soon that will come down(降落) to two seconds). Soon it will be possible to send it direct to other hospitals, or to computer screens in GP's(全科医生) clinics. PACS(图像存档通讯系统) is the most expensive single medical technology project ever funded in UK. Most of the money has come from the Department of Health, which has realized that it will benefit patients at the Hammersmith Hospital and those referred from elsewhere, in terms of(按照) better, quicker and safer diagnosis and treatment. Another technique uses radio a belled(用放射性同位素示踪的) white blood cells to guide doctors to the sites of hidden abscesses(脓肿) or other trouble spots. In the most innovative technique of all, interventional(干预的,介入的) radiology, doctors use tiny instruments at the ends of fine catheters(导管), inserted deep into the body under local anaesthetic, to perform a growing amount of microsurgery, viewed by surgeons—and patients if appropriate—in extremely clear detail. Every scrap(碎片,段) of unwanted image is electronically edited off the screen by the computer. The Hammersmith Hospital is also pioneering interventional radiography, in which doctor carry out microsurgery at the same time as they image the patients' organs in minute detail. The blocking or unblocking of arteries to prevent damage due to bleeding or thrombosis(血栓形成) is among the conditions now being treated in this way.

单选题Maine is justly famous for its beautiful lakes and ponds.

单选题How do you account for your absence from the class last Thursday?

单选题Having practiced for so long, he is standing ______ to win the final match.A. a chanceB. a timeC. a minuteD. a while