单选题If you ______ a heart-attack or stroke victim who needs your assistance, your first response should be to stay calm and urge bystanders to call for an ambulance.

单选题______he retires, Prof. Baker will have taught in the university for almost forty years.

单选题 重庆 重庆位于中国西南部，长江上游。它是一座举世闻名的山城，最突出的特点是地形起伏有致，立体感强。重庆凭借长江“黄金水道”之便，依托丰富的资源和广阔的市场，从汉代起就是长江上游的工商业重镇，如今更发展为集重工业、轻工业、贸易等为一体的经济、政治和文化中心。重庆处处都有中国传统文化的印痕，历代诗人如李白、陆游等，都在这里写有许多脍炙人口的名篇佳句。此外，重庆还是川菜的主要代表地域之一。

单选题Does ______ matter if he can't finish the job on time?

单选题One can understand others much better by noting the immediate and fleeting reactions of their eyes and ______ to expressed thoughts.

单选题The number of the newly admitted students ______ over 300, but a number of them ______not arrived yet.

单选题It was clear that the storm ______ his arrival by two hours. A. retarded B. retrieved C. refrained D. retreated

单选题Insomnia, or “poor sleep”, can have bad effects on a persons health and general well-being. It can_____21on both our physical and mental health and can lead to other health___请作答此空__22. Insomnia

单选题 The Growth of Cultural Consciousness 1. The first stage No understanding: 2 of the new culture 2. The second stage Superficial understanding ●awareness of 3 of the foreign culture ●serving as the basis of 4 ●highly ethnocentric, comparing the new culture with the 'better' culture back home 3. The third stage Growing 5 ●aware of 6 and less visible traits in the foreign culture ●still 7 and home culture-oriented 4. The fourth stage Intellectual comprehension ● 8 ●shedding ethnocentrism a little bit ●deeper understanding of the new culture ● 9 about cultural differences 5. The fifth stage True empathy and cultural respect ● 10 of cultural awareness ●actually feeling part of the culture ● 11 for the culture

单选题The water will be further polluted unless some measures ______. A. will be taken B. are taken C. were taken D. had been taken

单选题 Desert Formation A. The deserts, which already occupy approximately a fourth of the Earth's land surface, have in recent decades been increasing at an alarming pace. The expansion of desert-like conditions into areas where they did not previously exist is called desertification. It has been estimated that an additional one-fourth of the Earth's land surface is threatened by this process. B. Desertification is accomplished primarily through the loss of stabilizing natural vegetation and the subsequent accelerated erosion of the soil by wind and water. In some cases the loose soil is blown completely away, leaving a stony surface. In other cases, the finer particles may be removed, while the sand-sized particles are accumulated to form mobile hills or ridges of sand. C. Even in the areas that retain a soil cover, the reduction of vegetation typically results in the loss of the soil's ability to absorb substantial quantities of water. The impact of raindrops on the loose soil tends to transfer fine clay particles into the tiniest soil spaces, sealing them and producing a surface that allows very little water penetration. Water absorption is greatly reduced; consequently runoff is increased, resulting in accelerated erosion rates. The gradual drying of the soil caused by its diminished ability to absorb water results in the further loss of vegetation, so that a cycle of progressive surface deterioration is established. D. In some regions, the increase in desert areas is occurring largely as the result of a trend toward drier climatic conditions. Continued gradual global warming has produced an increase in aridity for some areas over the past few thousand years. The process may be accelerated in subsequent decades if global warming resulting from air pollution seriously increases. E. There is little doubt, however, that desertification in most areas results primarily from human activities rather than natural processes. The semiarid lands bordering the deserts exist in a delicate ecological balance and are limited in their potential to adjust to increased environmental pressures. Expanding populations are subjecting the land to increasing pressures to provide them with food and fuel. In wet periods, the land may be able to respond to these stresses. During the dry periods that are common phenomena along the desert margins, though, the pressure on the land is often far in excess of its diminished capacity, and desertification results. F. Four specific activities have been identified as major contributors to the desertification processes: over-cultivation, over-grazing, firewood gathering, and over-irrigation. The cultivation of crops has expanded into progressively drier regions as population densities have grown. These regions are especially likely to have periods of severe dryness, so that crop failures are common. Since the raising of most crops necessitates the prior removal of the natural vegetation, crop failures leave extensive tracts of land devoid of a plant cover and susceptible to wind and water erosion. G. The raising of livestock is a major economic activity in semiarid lands, where grasses are generally the dominant type of natural vegetation. The consequences of an excessive number of livestock grazing in an area are the reduction of the vegetation cover and the trampling and pulverization of the soil. This is usually followed by the drying of the soil and accelerated erosion. Firewood is the chief fuel used for cooking and heating in many countries. The increased pressures of expanding populations have led to the removal of woody plants so that many cities and towns are surrounded by large areas completely lacking in trees and shrubs. The increasing use of dried animal waste as a substitute fuel has also hurt the soil because this valuable soil conditioner and source of plant nutrients is no longer being returned to the land. H. The final major human cause of desertification is soil salinization resulting from over-irrigation. Excess water from irrigation sinks down into the water table. If no drainage system exists, the water table rises, bringing dissolved salts to the surface. The water evaporates and the salts are left behind, creating a white crustal layer that prevents air and water from reaching the underlying soil. The extreme seriousness of desertification results from the vast areas of land and the tremendous numbers of people affected, as well as from the great difficulty of reversing or even slowing the process. Once the soil has been removed by erosion, only the passage of centuries or millennia will enable new soil to form. In areas where considerable soil still remains, though, a rigorously enforced program of land protection and cover-crop planting may make it possible to reverse the present deterioration of the surface. I. In geography, an oasis is an isolated area of vegetation in a desert, typically surrounding a spring or similar water source. Oases also provide habitat for animals and even humans if the area is big enough. The location of oases has been of critical importance for trade and transportation routes in desert areas. Caravans must travel via oases so that supplies of water and food can be replenished. Thus, political or military control of an oasis has in many eases meant control of trade on a particular route. For example, the oases of Awjila, Ghadames and Kufra, situated in modem-day Libya, have at various times been vital to both North-South and East-West trade in the Sahara. Oases are formed from underground rivers or aquifers such as an artesian aquifer, where water can reach the surface naturally by pressure or by man made wells. Occasional brief thunderstorms provide subterranean water to sustain natural oases, such as the Tuat. Substrata of impermeable rock and stone can trap water and retain it in pockets, or on long faulting subsurface ridges or volcanic dikes water can collect and percolate to the surface. Any incidence of water is then used by migrating birds who also pass seeds with their droppings which will grow at the water's edge forming an oasis.

单选题Since you feel so strongly about this matter, you should make your views __________ to other committee members.

单选题Having finished their morning work, the clerks stood up behind their desks, ______ themselves.

单选题 Which of the following sentences is INCORRECT?

单选题To ______ the world peace has been one of the most crucial functions of the United Nations since it was founded in 1945. A. sustain B. maintain C. contain D. retain

单选题Either he or I ______to the airport.

单选题 ______ your timely advice, I would never have known how to go about the work.

单选题He was ______ to steal the money when he saw it lying on the table. A. dragged B. tempted C. elicited D. attracted

单选题I prefer writing a term paper ______ an examination.

单选题Even a child would not be ______ by such an obvious lie.