Questions 21 to 25 are based on the following passage. a=B0ytNm
Moreand more, the operations of our businesses, governments, and financialinstitutions are controlled by information that exists only inside computermemories. Anyone clever enough to modify this information for his own purposescan reap substantial rewards. Even worse, a number of people who have done thisand been caught at it have managed to get away without punishment. U}wq~fD
It’s easy for computer crimes to go undetected if no one checks up onwhat the computer is doing. But even if the crime is detected, the criminal maywalk away not only unpunished but with a glowing recommendation from his formeremployers. Sd{"A0[A|
Of course, we have no statistics on crimes that go undetected. But it’s disturbing to note how many of the crimes we do know about weredetected by accident, not by systematic inspections or other securityprocedures. The computer criminals who have been caught may been the victims ofuncommonly bad luck. =i5:*J
For example, a certain keypunch (键盘打孔) operatorcomplained of having to stay overtime to punch extra cards. Investigationrevealed that the extra cards she was being asked to punch were for dishonesttransactions. In another case, dissatisfied employees of the thief tipped off (向…透露) the company that was being robbed. ~\}EROb<
Unlike other lawbreakers, who must leave the country, commit suicide, or go tojail, computer criminals sometimes escape punishment, demanding not only thatthey not be charged but that they be given good recommendations and perhapsother benefits. All too often, their demands have been met. O/^w!
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Why? Because company executives are afraid of the bad publicity that wouldresult if the public found out that their computer had been misused. Theyhesitate at the thought of a criminal boasting in open court of how he juggled(耍弄) the most confidential records right under thenoses of the company’s executives, a accountant, andsecurity staff. And so another computer criminal departs with just therecommendations he needs to continue his crimes elsewhere. ^oB1 &G
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21.It can be concluded from the passage that ________. ^-
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A) it is still impossible to detect computer crimes today ft qW3VW
B) computer crimes are the most serious problem in the operation of financialinstitutions 2P=~3g*
C) computer criminals can escape punishment because they can’t bedetected WblV`"~e
D) people commit computer crimes at the request their company [}>6n72gNh
22.It is implied in the third paragraph that ________. fvM3.P
A) many more computer crimes go undetected than are discovered uv!qE1z@':
B) the rapid increase of computer crimes is a troublesome problem >,Bu^] C
C) most computer criminals are smart enough to cover up their crimes zwrZ^
D) most computer criminals are smart enough to cover up their bad luck a4.:
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23.Which of the following is mentioned in the passage? GXK?7S0H
A) A strict law against computer crimes must be enforced. eRy'N|'
B) Companies need to impose restrictions on confidential information. ;f^jB;\<
C) Companies will guard against computer crimes to protect their reputation. K y2xWd8
D) Companies usually hesitate to uncover computer crimes. #=#$b _6*
24.What may happen to computer criminals once they are caught? 7=*k@9
A) With a bad reputation they can hardly find another job. o5XUDDi
B) They will be denied access to confidential records. ?8}jJw2H
C) They may walk away and easily find another job. BvR3Oi@Wc
D) They must leave the country or go to jail. [:S F(*}
25.The passage is mainly about ________. Z|dZc wo
A) why computer crimes are difficult to detect by systematic inspections B"zg85
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B) why computer criminals are often able to escape punishment #}yFHM?i
C) how computer criminals manage to get good recommendation from their formeremployers #p`7gFl
D) why computer crimes can’t be eliminated 9d}
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Questions 26 to30 are based on the following passage. -y*+G&
It is often claimed that nuclear energy is something we cannot do without.We live in a consumer society where there is an enormous demand for commercialproducts of all kinds. Moreover, an increase in industrial production isconsidered to be one solution to the problem of mass unemployment. Such anincrease presumes an abundant and cheap energy supply. Many people believe thatnuclear energy provides an inexhaustible and economical source of power andthat it is therefore essential for an industrially developing society. Thereare a number of other advantages in the use of nuclear energy. Firstly, nuclearpower, except for accidents, is clean. A further advantage is that a nuclearpower station can be run and maintained by relatively few technical andadministrative staff. The nuclear reactor represents an enormous step in ourscientific evolution and, whatever the anti nuclear group says, it is wrong toexpect a return to more primitive sources of fuel. However, opponents ofnuclear energy point out that nuclear power stations bring a direct threat notonly to the environment but also to civil liberties. qM !q,Q
Furthermore, it is questionable whether ultimately nuclear power is a cheapsource of energy. There have, for example, been very costly accidents inAmerica, in Britain and, of course, in Russia. The possibility of increases inthe cost of uranium (铀) in addition to the cost ofgreater safety provisions could price nuclear power out of the market. In thelong run, environmentalists argue, nuclear energy wastes valuable resources anddisturbs the ecology to an extent which could bring about the destruction ofthe human race. Thus, if we wish to survive, we cannot afford nuclear energy.In spite of the case against nuclear energy outlined above, nuclear energyprogrammes are expanding. Such an expansion assumes a continual growth inindustrial production and consumer demands. However, it is doubtful whetherthis growth will or can continue. Having weighed up the arguments on bothsides, it seems there are good economic and ecological reasons for sources ofenergy other than nuclear power. M':.b+xN
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26.The writer’s attitude towardnuclear energy is ________. K3D $
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A) indifferent .Q)"F /
B) favorable k ,(:[3J
C) tolerant ]m>MB )9
D) negative yuX0Y{:I
27.According to the opponents of nuclear energy, which of the following is true ofnuclear energy?
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A) Primitive bC-x`a@
B) Exhaustible a8aqcDs>O
C) Cheap liP{Mu/LO
D) Unsafe ^D[;JV
28.Some people claim that nuclear energy is essential because ________. ".<p R}
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A) it provides a perfect solution to mass unemployment }!Lr!eALr
B) it represents an enormous step forward in our scientific evolution !:{_<