Part II Reading Comprehension (30 points, 45 minutes) D,ln)["xm
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. wvPk:1wD5
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Passage 1 v9->nVc-
Every year scientists open more doors that lead to the secrets of .GcKa024
new beneficent drugs. eR" <33{
There is bacitracin, which was discovered by two scientists at @ry_nKr9
Columbia University''s College of Physicians and Surgeons. These two AzxXB
people, Dr. Frank Meleney and Miss Balbina Johnson, knowing that the NN`uI6=
human body had some kind of action in itself with which it fights l/awS!Q/nF
infections, began to search for the chemical that does this. In the r0gJpttDl
hospital they examined badly infected wounds of people who had been t<viX's
hurt in accidents and made tests of the blood and the infected tissue. 8ITdSg
Finally, in the wound of a girl who had broken a leg bone, they 1y4
found the useful germs which seemed to be fighting the poisonous 8*T=Xei8
infection. They took some of these into the laboratory and from them n=ux5M
developed cultures; that is, larger masses of the germs with which to bbyg8;/
experiment. At last, after long and painstaking work, they were able /~f'}]W
to draw from these germs a substance which is a germ destroyer. Dr. H+Sz=tg5
Meleney and Miss Johnson named it bacitracin-baci because the germ is, qm o9G
in scientific language, a bacillus and tracin for Margaret Tracy, 1PV'?tXp(
whose broken leg supplied the germ. ]`+HO=0
Bacitracin at first was used only locally; later the drug was MFAH%Z$
developed into a solution that can be used to fight germ through the ?m?::R H
blood stream. ;x@~A^<el
16.Today, the discovery of a new drug occurs . exUu7&*:
A)very seldom. B)once in a generation. RuV
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C)once every ten years. D)frequently. w
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17. The scientific term for the action with which the human body h|{]B,.Lh
fights infection . Vt&2z)Zz
A)drug. B)biotic. u frL<]A
C)not mentioned. D)both A and B. XLOh7(
18. Searching for the fighting chemical, the scientists examined . V/I<g
A)fresh wounds. B)infected wounds. p xa*'h"b^
C)only infected leg bones. D)only a few wounds. ~;{;,8!)
19. Cultures, as used in this article, are . '=8d?aeF
A)masses of germs. LR.<&m%~.
B)blood tests. +V046goX W
C)masses of infected tissue. k],Q9
D)poisonous germs. kr:^tbJ
20. Bacitracin . 7XLtN "$$
A)is poisonous. B)destroys germs.
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C)restores broken bones. D)develops germs. >T
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21. To say that a drug was used locally is to say that it was . /,&<6c-Q@W
A)distributed through the whole system.
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B)used only in the area of infection. *>'
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C)used only at Columbia Wk4s reB
D)used only in hospitals. A,hJIe
22. From reading this selection you can infer that 6@ IXqKz
A)many scientific discoveries are due to chance. L<-_1!wh
B)every year scientists discover new beneficent drugs. a
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C)behind medical discovery there may be a dramatic story. _w(7u(Z
D)culture are large masses of germs. i8[t=6Rm@
Passage 2 aweV#j(y
Our echo sounder located the wreck of a French submarine that had JG!mc7
foundered during the war in seventy-five feet of water outside Dakar R_ ,U Mt
harbor. Dumas and I plunged down and found the vessel lying clean and ," Wr"
upright, surrounded by such clouds of fish as we had rarely seen-small Mxsa-?R;v
silver fingerlings and dark metals. As Dumas swam into the shadow of 1 s2>C!\
the port propeller, he came face to face with a gigantic fish, grouper |\<`Ib4j
variety, cousin to our familiar Mediterranean meroblast-fish. This }=UHbU.n~!
specimen was ten times the size of our old acquaintances: he weighed t?ZI".>
at least four hundred pounds. The wide, flat head and tiny eyes 5uNJx5g
advanced on Dumas; the ugly mouth yawned open, wide enough to admit C'+YQ]u
him. Dumas knew that sedentary groupers have no teeth to speak of; it D},>mfzF
seemed, however, that this individual might wish to swallow him |`f$tj
unmasticated in the fashion of the mero type which swims agape(大张着嘴), z8~NZ;A
taking in whole octopuses(章鱼). I^]2K0+x x
The cavernous mouth approached within two feet; Dumas sculled ;%5N%0,
backward, watchfully keeping a modest interval as the monster :P\7i
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unhurriedly followed. The knowledge that the species was harmless gave wj<6kG
Dumas little comfort as he gazed into the fish''s mouth; he and the fue(
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grouper exchanged mutual stares of revulsion for a seemingly E7 Ul;d
interminable period while Dumas was steadily pressed back. Then the d(x\^z
beast lost interest, turned aside, and returned to its dim home under Uq,^Wy
the lost submarine. Dumas surfaced in a reflective mood: "Imagine B6nX$T4zP
being swallowed by a lousy grouper." ks qQM
23. Dumas encountered the jewfish while . 2K6qY)/_
A)trying to locate an old wreck. 4 Y9`IgQ
B)skin fishing in Dakar harbor. UWJ8amA
C)swimming near a foundered submarine. VT`^W Hu
D)attempting to salvage a submarine. gNrjo=
24. The gigantic fish was actually . f#"J]p
A)an extraordinarily large pomfret. vHc%z$-d
C)a kind of grouper fish. #ut
B)a mero. J T7nG.9
D)both B and C.