Part II Reading Comprehension (30 points, 45 minutes) `aOFs+<)
Directions: In this part there are several passages. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked (A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet. a1T'x~ '
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Passage 1 esJ~;~[@(r
Every year scientists open more doors that lead to the secrets of 6,p
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new beneficent drugs. V.U|
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There is bacitracin, which was discovered by two scientists at wi!?BCseq
Columbia University''s College of Physicians and Surgeons. These two
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people, Dr. Frank Meleney and Miss Balbina Johnson, knowing that the lqy Qf$t
human body had some kind of action in itself with which it fights v_yw@
infections, began to search for the chemical that does this. In the %[GsD9_-
hospital they examined badly infected wounds of people who had been 2_>N/Z4T
hurt in accidents and made tests of the blood and the infected tissue. +V2F#fI/
Finally, in the wound of a girl who had broken a leg bone, they \<bx[,?
found the useful germs which seemed to be fighting the poisonous =0
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infection. They took some of these into the laboratory and from them 9p]QM)M
developed cultures; that is, larger masses of the germs with which to 8C40%q..
experiment. At last, after long and painstaking work, they were able W" scV@HKu
to draw from these germs a substance which is a germ destroyer. Dr. vz&|J
Meleney and Miss Johnson named it bacitracin-baci because the germ is, z 'Hw
in scientific language, a bacillus and tracin for Margaret Tracy, j;zM{qu_
whose broken leg supplied the germ. GblA9F7
Bacitracin at first was used only locally; later the drug was KR}?H#%
developed into a solution that can be used to fight germ through the Q3'llOx
blood stream. Z{*\S0^ST
16.Today, the discovery of a new drug occurs .
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A)very seldom. B)once in a generation. PI {bmZ
C)once every ten years. D)frequently. ./Xz}<($8
17. The scientific term for the action with which the human body L;z?aZ7n
fights infection . +|3@=.V
A)drug. B)biotic. FaAC&F@u
C)not mentioned. D)both A and B. 70d 1ReQ
18. Searching for the fighting chemical, the scientists examined . ^^sE:
A)fresh wounds. B)infected wounds. sI=xl
C)only infected leg bones. D)only a few wounds. [jQp~&nY
19. Cultures, as used in this article, are . "S[450%
A)masses of germs. <_L,t 1H{
B)blood tests. RNk\.}m
C)masses of infected tissue. (TtkFo'!U
D)poisonous germs. ),%%$G\
20. Bacitracin . ;?Tbnn Wn
A)is poisonous. B)destroys germs. n`_{9R
C)restores broken bones. D)develops germs. RMV/&85?y
21. To say that a drug was used locally is to say that it was . ;+R&}[9,A)
A)distributed through the whole system. g/d<Zfq<{
B)used only in the area of infection. nF]W,@u"h
C)used only at Columbia }0*@fO
D)used only in hospitals. `g?Negt\v
22. From reading this selection you can infer that p<FzJ
A)many scientific discoveries are due to chance. 3*XNV
B)every year scientists discover new beneficent drugs. |3b^~?S
C)behind medical discovery there may be a dramatic story. ?4
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D)culture are large masses of germs. 8FK/~,I
Passage 2 05#1w#i
Our echo sounder located the wreck of a French submarine that had qA7>vi%
foundered during the war in seventy-five feet of water outside Dakar 2zA4vZkbcw
harbor. Dumas and I plunged down and found the vessel lying clean and 4Z=_,#h4.
upright, surrounded by such clouds of fish as we had rarely seen-small
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silver fingerlings and dark metals. As Dumas swam into the shadow of H2
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the port propeller, he came face to face with a gigantic fish, grouper :r,pqnH_
variety, cousin to our familiar Mediterranean meroblast-fish. This 9L?.m&
specimen was ten times the size of our old acquaintances: he weighed #G|RnV%t$~
at least four hundred pounds. The wide, flat head and tiny eyes =ho}oL,ZO
advanced on Dumas; the ugly mouth yawned open, wide enough to admit 4he GnMD
him. Dumas knew that sedentary groupers have no teeth to speak of; it
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seemed, however, that this individual might wish to swallow him Vb;*m5,?:
unmasticated in the fashion of the mero type which swims agape(大张着嘴), _Ey9G
taking in whole octopuses(章鱼). }eU*(
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The cavernous mouth approached within two feet; Dumas sculled sf
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backward, watchfully keeping a modest interval as the monster (Z q/
unhurriedly followed. The knowledge that the species was harmless gave 6I4\q.^qw
Dumas little comfort as he gazed into the fish''s mouth; he and the wu!59pL
grouper exchanged mutual stares of revulsion for a seemingly jXx<`I+]
interminable period while Dumas was steadily pressed back. Then the rQs
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beast lost interest, turned aside, and returned to its dim home under [A~xy'T
the lost submarine. Dumas surfaced in a reflective mood: "Imagine .t-4o<7 3
being swallowed by a lousy grouper." BLdvyVFx
23. Dumas encountered the jewfish while . %6,SKg p
A)trying to locate an old wreck. qvsd5P eCO
B)skin fishing in Dakar harbor. OA1uY83"
C)swimming near a foundered submarine. Ecefi
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D)attempting to salvage a submarine. ,j{,h_Op
24. The gigantic fish was actually . RDi]2
A)an extraordinarily large pomfret. `Bp.RXsd*
C)a kind of grouper fish. ^WgX Qtn
B)a mero. jDfC=a])
D)both B and C.