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He talked about the feasibility of setting up an experimental school in which each
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根据下列文章,请回答 36～40 题。
Where Ha ve All the Frogs Gone？
In the 1980s, scientists around the world began to notice something strange: Frogs were disappearing. More recent research has shown that many kinds of a mphibians 两栖动物) are declining or ha ve become extinct. They ha ve been around for along time - over 350 million years. Why are they dying out now？
Scientists are seriously concerned about this question. First of all, a mphibians are an important source of scientific and medical knowledge. By studying a mphibians, scientists ha ve learned about new substances that could be very useful for treating human diseases. Further research could lead to many more discoveries, but that will be impossible if the a mphibians disappear.
The most serious aspect of a mphibian loss, however, goes beyond the a mphibians themselves. Scientists are beginning to think about what a mphibian decline means for the planet as A whole. If the earth is becoming unlivable for a mphibians, is it also becoming unlivable for other kinds of animals and human beings as well？
Scientists now believe that a mphibian decline is due to several environmental factors. One of these factors is the destruction of habitat, the natural are a where an animal lives. Amphibians are very sensitive to changes in their habitat. If they cannot find the right conditions, they will not lay their eggs. These days, as wild areas are covered with houses, roads, farms, or factories, many kinds of a mphibians are no longer laying eggs. For exa mple, the arroyo toad (蟾蜍) of southern Californi a will only lay its eggs on the sandy bottom of aslow-moving strea m. There are very few strea ms left in southem California , and those strea ms are often muddy because of building projects. Not surprisingly, the arroyo toad is now in danger of extinction.
There are A number of other factors in a mphibian decline. Pollution is one of them. In many industrial areas, air pollution has poisoned the rain, which then falls on ponds and kills the frogs and toads that live there. In farming areas, the hea vy use of chemicals on crops has also killed off a mphibians. Another factor is that air pollution has led to increased levels of ultra violet (UV) light. This endangers a mphibians, which seem to be especially sensitive to UV light. And finally, scientists ha ve discovered A new disease that seems to be killing many species of a mphibians in different parts of the world.
All these reasons for the disappearance of a mphibians are also good reasons for more general concern. The destruction of land, the pollution of the air and the water, the changes in our atmosphere, the spread of diseases - these factors a ffect human beings, too. Amphibians are especially sensitive to environmental change. Perhaps they are like the canary (金丝雀) bird that coal miners once used to take down into the mines to detect poisonous gases. When the canary beca me ill or died, the miners knew that dangerous gases were near and their own lives were in danger.
第 36 题 Losing a mphibians means losing
Which of the following is NOT a phenomenon mentioned in the passage？
Mary gets up at six O’clock every morning．
根据下列文章,请回答 16～22 题。
Nurses
The physicians in a hospital form. the core of the medical staff．But they could not provide effective medical care to their patients without the help of numerous other medical workers．From the angle of the patients，the nursing staff is particularly important．Nurses are usually in close contact with patients as long as they are in the hospital．
A nurse does not study for as many years as a doctor．However, each must be equally trained。Caring for sick persons requires a great deal of patience and concern Most nurses work long days，and they often must work at odd hours or during the night．
The nursing staff in a hospital is usually quite large and various．Nursing services，after all must be provided on a 24hour basis．There are professional (专业的)nurses，practical nurses。nurse’s aids，and orderlies(勤杂)．The general term nurse refers to a person trained to offer bedside care to sick persons．
Under the supposition(管理)of the head nurse，the nursing staff in a hospital ward must attend to patients needs．This responsibility continues around the clock，and SO‘nurses must work in shifts．A shift is a period of duty，usually eight hours in length．The nurses on the ward rotate(轮换)their shifts．Some take turns working night duty；others work odd shifts．A of them work out of a central area on the ward called the nurse’s station．
A nurse must always be on her guard．She can never afford to be careless．This IS true in all nursing situations。but it is especially true in the intensive cal。e unit．Patients under intensive care are critically ill．and they must be monitored at all times．The nurses who do intensive care duty have one of the most demanding jobs in the hospital．
第 16 题 The physicians in a hospital are less important than the nursing staff．
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