单选题When it rains or snows, some of the water is reserved by the soil, some is absorbed by vegetation, some evaporates, and the remainder, which reaches stream channels, is called runoff (径流). Floods occur when soil and vegetation cannot absorb all the water; water then runs off the land in quantities that cannot be carried in stream channels or retained in natural ponds and constructed reservoirs. About 32 percent of all precipitation (雨的降落) is runoff, and this amount may be increased by melting snow masses. Periodic floods occur naturally on many rivers, forming an area known as the floodplain (涝原). These river floods often result from heavy rain, sometimes combined with melting snow, which causes the rivers to overflow their banks; a flood that rises and falls rapidly with little or no advance warning is called a flash flood (暴洪). Flash floods usually result from intense rainfall over a relatively small area. Coastal areas are occasionally flooded by unusually high tides induced by severe winds over ocean surfaces, or by tidal waves (海啸) caused by undersea earthquakes.
Floods not only damage property and endanger the lives of humans and animals, but exert other effects as well. Rapid runoff causes soil erosion as well as sediment (沉淀物) deposition problems downstream (下游). Spawning (产卵) grounds for fish and other wildlife habitat are often destroyed. High-velocity currents increase flood damage; prolonged high floods delay traffic and interfere with drainage and economic use of lands. Bridge abutments (桥台), bank lines, sewer outfalls, and other structures within floodways are damaged, and navigation and hydroelectric power are often impaired (侵害). Financial losses due to floods all over the world are commonly billions of dollars each year. The basic methods of flood control have been practiced since ancient times. These methods include reforestation (再造林) and the construction of levees (防洪堤), dams, reservoirs, and floodways.
单选题Howoftendoesthewomangotocinema?
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单选题Whatdoyoulearnabouttheman?A.Hewilldefinitelynotlendherthemoney.B.Hewilllendherthemoney.C.Hemightlendherthemoney.D.Hethinksitisstillaquestion.
单选题Directions: Read the following text. Choose
the best word or phrase for each numbered blank and mark A, B, C or D on ANSWER
SHEET 1. Most radio and television stations in the
United States are commercial stations, {{U}} {{U}} 1 {{/U}}
{{/U}}is to say, they earn their money from {{U}} {{U}} 2 {{/U}}
{{/U}}or commercials. Private companies purchase radio and television {{U}}
{{U}} 3 {{/U}} {{/U}}from the commercial stations in order to
{{U}} {{U}} 4 {{/U}} {{/U}}their products. Cable television
stations are also {{U}} {{U}} 5 {{/U}} {{/U}}stations, though
they do not usually have advertisements. {{U}} {{U}} 6 {{/U}}
{{/U}}watch cable stations, people must pay the cable TV company a certain amount
of money each {{U}} {{U}} 7 {{/U}} {{/U}}.
Public radio and television stations, on the {{U}} {{U}} 8
{{/U}} {{/U}}hand, do not have advertisements and people do not have to
{{U}} {{U}} 9 {{/U}} {{/U}}to watch them. These stations gain
their money {{U}} {{U}} 10 {{/U}} {{/U}}the government, private
companies, and from some of the {{U}} {{U}} 11 {{/U}} {{/U}}who
watch or listen to their programs. The {{U}} {{U}} 12 {{/U}}
{{/U}}government and some large corporations give {{U}} {{U}} 13
{{/U}} {{/U}}, large gifts on money, to the public stations. Small businesses
and people also {{U}} {{U}} 14 {{/U}} {{/U}}money to their local
public radio and television stations. ABC, CBS, and NBC are the
three {{U}} {{U}} 15 {{/U}} {{/U}}commercial radio and
television {{U}} {{U}} 16 {{/U}} {{/U}}in the United States.
Most local commercial radio and TV stations {{U}} {{U}} 17
{{/U}} {{/U}}their programs from one of these national networks. {{U}}
{{U}} 18 {{/U}} {{/U}}example, each network has a TV news program in
the evening, {{U}} {{U}} 19 {{/U}} {{/U}}the local stations
broadcast in addition to their {{U}} {{U}} 20 {{/U}} {{/U}}local
news programs.
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单选题The passage implies that reversing the muscle-bone movement used to bend an arm requires______.
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单选题Text In Britain, winter is the season not only for visits to the theatre, opera, concerts and ballet, but also for shopping or for sightseeing. London, one of the (26) cities in the world, has plenty to offer during the winter months, (27) in the way of entertainment—and the (28) act like a magnet with (29) array of presents for the Christmas (30) , followed by large scale bargains in the January (31) . But it's not only London that (32) value shopping—most of our suburban and (33) centres have just as much to offer to the (34) shopper. Even if you're based (35) London, you don't have to spend all your (36) there—and that goes for all the year (37) , too. Take a train or coach and (38) what else Britain has to offer; (39) are many excursions, even in winter, and among the great country houses (40) keep their stately front doors open (41) the year are Longleat and WoburnAbbey. (42) a car and drive (43) into the beauty of the winter landscape—the scenery will be (44) beautiful—and the people will have more time to chat to you (45) this time of year.
单选题Questions 19-22 are based 017 dialogue on a student the library check list．
单选题Questions 18 ～21 are based on the following dialogue.
单选题According to Einstein, the current moral decline may be reversed ______.
单选题 {{I}}Questions 22～25 are based on the following
monologue.{{/I}}
单选题The potential of computers for increasing the control of organizations or society over their members and for invading the privacy of those members has caused considerable concern. The privacy issue has been raised most insistently with respect to the creation and maintenance of data files that assemble information about persons from a multitude of sources. Files of this kind would be highly valuable for many kinds of economic and social research, but they are bought at too high a price if they endanger human freedom or seriously enhance the opportunities of blackmailers. While such dangers should not be ignored, it should be noted that the lack of comprehensive data files has never before been the limiting barrier to the suppression of human freedom. Making the computer the villain in the invasion of privacy or encroachment on civil liberties simply diverts attention from the real dangers. Computer data bank files can and must be given the highest degree of protection from abuse. But we must be careful also, that we do not employ such crude methods of protection as to deprive our society of important data it needs to understand its own social process and to analyze its problems. Perhaps the most important question of all about the computer is what it has come and will do to man's view of himself and his place in the universe. The most heated attacks on the computer are not focused on its possible economic effects, its presumed destruction of job satisfaction, or its threat to privacy and liberty, but upon the claim that it causes people to be viewed, and to view themselves, as machines. What the computer and the progress in artificial intelligence challenge is an ethic that rests on man's apartness from the rest of nature. An alternative ethic, of course, views man as a part of nature, governed by nature law, subject to the forces of gravity and the demands of man's body. The debate is about artificial intelligence and the demands of man's body. The debate is about artificial intelligence and the stimulation of man's thinking is, in considerable part, a confrontation of these two views of man's place in the universe.
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单选题What'stheman'sfirstreactiontowhatthewomandescribes?A.Heisshocked.B.Heisexcited.C.HeisupsetD.Heisdoubtful.
单选题 Questions 23 to 25 are based on the following talk on
mum's business.
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