标签：职称英语考试试题,职称英语考试答案,职称英语考试真题,http://www.deyou8.com
2009年职称英语考试理工类(B级)试题,
4． Usually we use electricity to generate electromagnetic energy．The source of most of our energy is the sun．Heat from the sun causes water to evaporate．When the water falls to the earth as rain，some of it is trapped behind dams and then used to operate electric generators．Other generators are powered by coal，but the energy stored in coal came from the sun．too．
5． Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle．If the sun depended on chemical reactions，it would have used up all its energy long ago．Experiments with electromagnetic radiation led to the theory that mass can be converted into energy．About forty years after the theory was proposed，nuclear energy was harnessed(利用)by man．Chemical energy comes from electron(电子) rearrangement. Nuclear energy comes from a change in the nucleus of an atom．Compared with chemical reactions．nuclear reactions release millions of times more energy per pound of mel．We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium (氦)．
6． Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity．It is also being used to operate engines in large ships．Scientists continue to seek new and better methods of obtaining and using energy.
23 Paragraph 3
24 Paragraph 4
25 Paragraph 5
26 Paragraph 6
A Nuclear Reactions as the Lasting Source of the Sun's Energy
B The Most lmportant Source of Energy
C Types of Electromagnetic Energy
D The Machines Used for Energy Generation
E Seeking New Sources of Energy
F The Use of Ultraviolet Radiation in Medicine
27 One can get a sunburn even .
28 Infrared radiation can produce heat .
29 X-rays and gamma rays can be used to detect and
treat cancer .
30 Chemical energy is generated .
A when it is absorbed by matter
B when it is cloudy
C because they can pass through solid objects
D when the sunrays are fierce
E when a change in the nucleus of an atom takes place
F when electron rearrangement takes place
第4部分：阅读理解（第31~45题，每题3分，共45分）
下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案涂在答题卡相应的位置上。
第一篇 A Thirsty World
The world is not only hungry,it is also thirsty for water．This may seem strange to you，since nearly 75％of the earth's surface is covered with water．But about 97％of this huge amount is sea-water．or saIt water．Man can only drink and use the other 3％-the fresh water that comes from rivers，lakes，underground，and other sources．And we cannot even use all of that, beeause some of it is in the fonn of icebergs(冰山)and glaciers (冰川)．Even worse,some of it has been po1luted．
At the moment，this small amount of flesh water is still enough for us.Howeve，our need for water is increasing rapidly．Only if we take steps to deal with this problem now can we_avoid
a severe worldwide water shortage later on．A limited water supply would have a bad eriect on alriculture and industry．
In addition to stopping wasting our precious water,one useful step we shouId take is to develop ways of reusing it . Experiments have alre．ady been done in this field，but only on a small scale．
Today, in most large cities，water is used only once and it eventually retums to the sea or runs into underground storage tanks．But it is possible to pipe water that has been used to a
purifying(净化)plant．There it can be filtered(过滤)and treated with chemicals so that it can be used again just as if it were flesh from a spring．
But even if every large city purified and reused its water，we still would not have enougn.Where could we tum next?To the oceans!All we'd have to do to make use of the vast amount of sea-water is-remove the salt．This salt-removing process is already in use in many Parts of the world．
So if we take a11 these steps，we'11 be in no danger of drying up !
31 The phrase''the world"in the first line of the passage refers to
A "man"．
B "you"．
C "woman"．
D "they"．
32 What percentage of the earth's water can man actually use at present?
A Nearly 75 per cent．
B About 97 per cent．
C Exactly 3 per cent．
D Lessthan 3 per cent．
33 According to the passage，we can avoid a worldwide water shortage in the future by
A increasing rainfall．
B reusing water and utilizing sea-water.
C cutting down our consumption of water.
D reducing the number of factories producing steel．
34 Which of the following statements，according to the passage，is NOT true?
A A limited water supply will affect industrial production．
B Every large city purifies and reuses its water．
C Purified water is not exactly as flesh as spring water．
D Oceans are the largest water source．
35 According to the passage，sea-water can be turned into flesh water by
A heating it up．
B treating it with chemicals．
C taking salt out of it．
D drying it up.
第二篇 Nonverbal Thinking in Engineering
Many objects in daily use have clearly been influenced by science．However,their form and tunctlon，their dimensions and appearance，were determined by technologists．designers．
inventors， and engineers using nonscientific modes of thought．Many features and qualities of the objects that a technologist thinks about cannot be reduced to clear verbal descriptions；they are dealt with in the mind by a visual，nonverbal process．Pyramids，cathedrals，and rockets exist not
because of geometry or thermo-dynamics(热动力学)，but because they were first the picture in the minds of those who built them．
The creative shaping process of a technologist's mind can be seen in nearly every artifact (人工制品) that exists．For example，in designing a diesel engine ，a technologist might express individual(个人的)ways of nonoerbal，thinking on the machine by continually using an intuitive (直觉的)sense of rightness and fitness．What would be the shape of the combustion chamber (燃烧室)?Where should the valves(阀)be placed?Such questions have a range of answers that are supplied by experience，by physical requirement，by limitations of available space．and not in the least by a sense of form．Some decisions，such as wall thickness and pin diameter,may depend on scientific calculations，but the nonscientific component design remains primary．
Design courses，then，should be an essential element of engineering curricula．Nonverbal thinking，a central mechanism in engineering design，involves perceptions，which is the special
上一页 [1] [2] [3] [4] 下一页
