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智力服务于中国,提高企业与个人整体竞争力 第22 页 q&u$0XmV
北京师范大学2007 年博士生入学考试英语试题 jMK3T
I. Listening Comprehension (15 points) g93I+
Section A y&
7YJx
Directions: There are five statements in this section. Each statement will be spoken fk+1# 7{
only' once. When you hear a statement, read the four choices given and choose the gzor%)C
one which is closest in meaning to the statement you have heard by marking the a lrt*V|=
corresponding letter A, B, C, or D on the ANSVER SHEET with a single line through !]yQ1@)*'
the center. mj)PLZ]
1. *]5z^>
q;7
A. He is in a drug store. 1:_=g #WH
B. He is at a department store. Po> e kz_E
C. He is at home. \[cH/{nt
D. He is at his doctor's office. Te+^J8
2. N3ZiGD
A. I missed in3' train because you stopped me. 2sUbiDe-
B. You made me forget what I was saving 9/G!0uE
C. You looked so deep in thought that I didn't want to bother you. 7ZQ'h3K
D. You told me never to interrupt you.
P&mtA2
3. ^1.7Juvb
A Sally drove back and forth to work twice today d
N<5JQql
B. Sally took long time to do her work. 2hy NVG&$
C. Sally took her lunch with her to work. Ih()/(
D. Sally usually gets to work in much less time. iOll WkF
4. Q&gPa]z]}
A. If you audit a course, you don't have to take the tests. 9
Va40X1
B. You have to take a test if you want to add another course. qC..\{z
C. Of course you need to buy some textbooks. Jh?z=JY
D. It is not necessary to order a textbook. p
isB,wP$2
5. /1[gn8V691
A. The speaker's salary is $250. 7WP%J-
B. The speaker's salary is $1000. T/5"}P`
C. The speaker's salary is $1100. .gq(C9<B[
D. The speaker's salary is $ 275. gQ>2!Qc a-
Section B "J!}3)n
Directions: In this section, you will hear five short conversations. At the end of GmbIFOT~
each conversation, a question will be asked about what was said. Both the conversation ec?V[v
and the question will be spoken only once. After each question there will be a pause. 's.~$
During the pause, you must read the four choices marked A, B, C and D, and decide +zsZNJ(U
Gqt-_gga
智力服务于中国,提高企业与个人整体竞争力 第23 页 +]c}rWm
which is the best answer. Then mark the corresponding letter on the ANSWER SHEET with U(~U!O}
a single line through the center. sAYV)w3u"
6. 4\6:\
A. Clean up her room `
8UWE {
B. Get her report back. 4LsHs
C. Not wait for him past noon. JKy#j g:#
D. Not worry about her raincoat. M6Pw/S!
7. [@3SfQ
A. It was probably Mr. Brown's phone number that the woman wrote down. X>t3|h
B. it was just an hour ago that the man met Mr. Brown. `?9T~,
C. The woman forgot to write down the phone number. Go <'
D. The woman needed a sheet of paper to put down the number. ^PqMi:htc
8. s<&[\U
A. Someone who is in charge of hunting. %!y89x=E
B. A boss of a company. .GCR!V
C. A job-seeking advisor. "-
eZZEl(
D. Someone who is in charge of looking for talents for a company. hS:j
Bp,
9. V"#Jk!k9k
A. The woman is not careful at all this time. b/<mRQ{
B. No matter how careful one can be, it is not enough a2yE:16o6
C. The woman is most careful this time. wqy^8N[K]
D. The woman has never been careful. 73
V"s
10. Rri`dmH
A. Ton: stayed in a room on the second floor for an hour. 7>n"}8i
B. Nobody but the woman noticed that Tom was absent. \.<KA
C. Tom was absent when the discussion was held. "~ EGS%C%>l/o
D. Tom stayed in Room 302 for an hour. J`oTes,
Section C !M;A*:-
Directions: In this section, you will hear an interview. Look at the five statements +\`rmI
for this part on your test paper and decide if you think each statement is true or 4:1)~z
false while you are listening to the interview. If you think the answer is true, mark rLF*D
B3l
A, if you think the answer is false, mark B on the e\NS\VER SHEET with a single line S~3\3qt$
through the center. gyu6YD8L
11. Xiang zhen has lived in the United States since she was ten years old. 'jvpNn
12. In Korea, the American gesture for "come" is used :o call dogs. #w>~u2W
13. When talking to an older person or someone with a higher social position. c2<,|D|
Koreans traditionally look at the person's feet. saW!9HQj
t;47(U
智力服务于中国,提高企业与个人整体竞争力 第24 页 `.^ |]|u
14. Between males and females, direct eye contact is a sign of attraction, U7H
9/<&o
15. After many years in the United States. Xiangzhen's body language is still !wh&>3~
completely Korean. JNo8>aFOb
" ' Gvx[8I
II. Reading Comprehension (30 points) N
:W9},
Directions: Read the following passages carefully end then select the best answer }htPTOy5
from the four choices marked A, B, C, and D by marking the corresponding letter on pbn\9C/
the Answer Sheet with a single line through the center. '*
!L!VJ
1 ;/sHWI
f+Z
Since the first brain scanner was constructed several years ago, computed h-mTj3p-K
tomography or computed medical imagery, has become fairly widely used. Its rapid (lWq[0^N
acceptance is due to the fact that it has overcome several of the drawbacks of `\b+[Nes
conventional X-ray technology. o""~jc~
To begin with, conventional two-dimensional X-ray pictures cannot show all of WzlC*iv
the information contained in a three-dimensional object. Things at different depths 'HaD
~pa
aresuper imposed, causing confusion to the viewer. Computed tomography can give L`3n2DEBf
three-dimensional information. The computer is able to reconstruct pictures of the O#_x)13
body's interior by measuring the varying intensities of X-ray beams passing through EUcKN1
sections of the body from hundreds of different angles. Such pictures are based on +nU.p/cK+\
series of thin "'slices". _T*AC.
In addition, conventional X-ray generally differentiates only between bone and `s/?b|,
air, as in the chest and lungs. They cannot distinguish soft tissues or variations -s"0/)HD
in tissues. The liver and pancreas are not discernible at all, and certain other organs UI?=]"
max only be rendered visible through the use of radio paque dye. Since computed =NDOS{($
tomography is much more sensitive, the soft tissues of the kidneys or the liver can DW2>&|
be seen and clearly differentiated. This technique can also accurately measure F
?=9eISLJ
different degrees of X-ray absorption, facilitating the study of the nature of" = `t^~.5
tissue. 6|=j+rScv
A third problem with conventional X-ray methods is their inability Io measure QLr9dnA
quantitatively the separate densities of the individual substances through which the O<N#M{kc.
X-ray has passed. Only the mean absorption of all the tissues is recorded. This is ^v:Z o
not a problem with computed tomography. It can accurately locate a tumor and ,XB%\[pKe
subsequently monitor the progress of radiation treatment, so that in addition to its yrr)
y
diagnostic capabilities, it can play a significant role in therapy. 4gZ&^y'
16. Conventional X-rays mainly show the difference between qL
5>o>J
A. bone and air B. liver and pancreas n WaNT-
C. muscle and other body tissues D. heart and lungs 658^"]Rk'/
智力服务于中国,提高企业与个人整体竞争力 第25 页 .i/m
17. What kind of view is made possible by contiguous cross sections of the body? =8JB8ZFP
A. Two-dimensional. B. Three-dimensional. Yp
mYxd^
C. Animated. D. Intensified. 1oY^]OD]W
18. It can be inferred form the passage that. compared to conventional X-ray OAe#Wf!c
techniques, computed tomography is more P:{<*`q
A. compact B. rapid ls
|LCQPx
C. economical D. informative ?<%=:
Yh
19. what is the author's attitude toward this new technique? ZFxLBb:
A. Cautious. B. Tolerant. H lB]38
C. Enthusiastic. D. Critical. !1Y&Y@ze
20. According to the passage, computed tomography can be used for all of the <~"lie1
following EXCEPT +4)7j&L
A. monitoring a patient's disease B. diagnosing disorders Q*ju
sm
C. locating tumors D. reconstructing damaged tissues $g\&5sstE
Passage 2 1wn&js C
Because early man viewed illness as divine punishment and healing w"zE_9I\
as purification, medicine and religion were inextricably, linked for centuries. ^DAu5 |--R
This notion is apparent in the origin of our word "pharmacy," which comes M\2"gT-LV
from the Greek pharmakon, meaning "purification through purging." x]4Kkpqm
By 3500 B.C., the Sumerians in the Tigris-Euphrates valley had *yaw$oB
developed virtually all of our modern methods of administering drugs. They >fs2kha
used gargles inhalations, pills, lotions, ointments, and plasters. The first gNj7@bX~
drug catalog, or p harmacopoeia, was written at that time by an unknown *75YGD
Sumerian physician. Preserved in cuneiform script on a single clay' tablet are 5<+K?uhm
the names of dozens of drugs to treat ailments that still afflict us today. M {a
#
The Egyptians added to the ancient medicine chest. The Ebers Papyrus. Zq"7,z7
a scroll d a t i n g f r o m 1 9 0 0 B . C . a n d n a m e d a f t e r t h e G e rman Egyptologist D4Nu8Wr$
George Ebers. reveals the trial-and-error know-how acquired by early
"lVqU
Egyptian physicians. To relieve indigestion, a chew of peppermint leaves and 1y5Ex:JVZT
carbonates (known today. As antacids) was prescribed, and to numb the pain of 2xxB\J
tooth extraction, Egyptian doctors temporarily stupefied a patient with ethyl 4g` jd
alcohol. ~^U
S/"
The scroll also provides a rare glimpse into the hierarchy of ancient drug 2YBIW
R8z
preparation. The "'chief of the preparers of drugs" was the equivalent of jgu*Y{oc
m
a head pharmacist, who supervised the "'collectors of drugs." field workers, 5LW}h^N
who gathered essential minerals and herbs. The "'preparers" aides" (technicians) !DXNo(:r
智力服务于中国,提高企业与个人整体竞争力 第26 页 Frm;Ej3?$
dried and pulverized ingredients, which were blended according to certain Ib
`-pRU;
formulas by' the "'preparers." pmc=NTr&<
And the "conservator of drugs" oversaw the storehouse where local and $95~5]-nh
imported mineral, herb, and animal-organ ingredients were kept. (/{aJV
By the seventh century B.C.. the Greeks had adopted a sophisticated )P
Jw+5
mind-body view of medicine. They- believed that a physician must pursue the &Z^(y}jPr
diagnosis and treatment of the physical causes of disease within a scientific 4B[D/kIg
framework, as well as cure the supernatural components involved. Thus, the v! hY
early, Greek physician emphasized something of a holistic approach to health, kI\tqNJ i
even if the suspected "mental" causes of disease were not recognized as stress QfpuZEUK
and depression but interpreted as curses from displeased deities.
Nh!_l
The modern era of pharmacology began in the sixteenth century, ushered yt0,^*t_
in by' the first major discoveries in chemistry. The understanding of how F`+\>ae$h
chemicals interact to produce certain effects within the body would 'S4)?Z
eventually remove much of the guesswork and magic from medicine. +OaUP*\Dd
Drugs had been launched on a scientific course, but centuries "would pass ja=w5
before superstition was displaced by' scientific fact. One major reason was that N3A<:%s
physicians. unaware of the existence of disease-causing pathogens ..such as 3z =^(Y
bacteria and viruses, continued to dream up imaginary causative evils .And' OYL]j{
though new chemical compounds emerged, their effectiveness in treating )]6hy9<
disease was still based largely on trial and error. ]/2T\w.<
Many standard, common drugs in the medicine chest developed in this -yH,5vD
trial-and-error environment. Such is the complexity of disease and human DT(d@upH
biochemistry that even today, despite enormous strides in medical science, many of 47By`Jh71
the latest sophisticate additions to our medicine chest shelves were accidental +g *k*e>l
finds. 0HeD{TH\
21. The author cites the literal definition of the Greek word pharmakon in the first v({N:ya
paragraph in orderto e79KbLV
A. show that ancient civilization had an advanced form of medical science rfcN/:k
B. point out that man}' of the beliefs of ancient civilizations are still held today "9y(
}
C. illustrate that early man thought recovery from illness was linked to internal lTRl"`@S
cleansing GC@+V|u
D. emphasize the primitive nature of Greek medical science >7Jr^o#|_x
22. According to the passage, the seventh-century Greeks' view of medicine differed 9i$NhfOe
from that of the Sumerians in that the Greeks /#LW"4;*
A. discovered more advanced chemical applications of drugs ?V(^YFzZ
B. acknowledged both the mental and physical roots of illness \fWW'
智力服务于中国,提高企业与个人整体竞争力 第27 页 afEF]i
C. established a rigid hierarchy for the preparation of drugs 3)Ac"nuyqH
D. attributed disease to psychological, rather than physical, causes )U
t5+-UK
23. In Paragraph 5, the word "holistic'" most nearly' means _Q(g(p&
A. integrated B. religious $0A ~uDbs
C. modern D. physiological B~o-l*
24. The passage indicates that advances in medical science during the modern era of '\q f^?9
pharmacology may have been delayed by, +
/{L#e>
A. a lack of understanding of he origins of disease RD,5AShP
B. a shortage of chemical treatments for disease Q%S9fq,q
C. an inaccuracy in pharmaceutical preparation Zi\['2CG
D. an overemphasis on the psychological causes of disease C#pZw[
25. In the final paragraph, the author makes which of the following observations about ,FzeOSy'p
scientific discovery? oFsM6+\/S
A. Human biochemistry is such a complex science that important discoveries are M\<w#wZ
uncommon.
&^&zR(o`
B. Many cures for common diseases have yet to be discovered. SGc8^%-`
C. Trial and error is the best avenue to scientific discovery. cE'L% Z
D. Chance events have led to the discovery of many modem drugs. >x1p%^cA;=
Passage 3 K4Dp:2/K%
When imaginative men turn their eyes towards space and wonder whether life exists &;TJ~r#K
in any' part of it, they may cheer themselves by remembering that life need not 5~sx:0;
resemble closely the life that exists on Earth. Mars looks like tile only planet where J8a*s`ik
life like ours could exist, and even this is doubtful. But there may be miler kinds *u6Y8IL1
of life based on other kinds of chemistry and they may multiply on Venus us or Jupiter. ?L)
!pP]
At leas we cannot prove at present that they do not. Joe_P
S
Even more interesting is the possibility that life on their planets may be in `Pn[tuIO
a more advanced stage of ev0Iution. Present-day man is in a peculiar and probably /Dtd#OAdr
temporary stage. His individual units retain a strong sense of personality. They are, qSCv )S(
in fact, still capable under favorable circumstances of leading individual lives. }ArpPU
:]
But man's societies are already sufficiently.' developed to have enormously more =SOe}!
power and effectiveness than the individuals have. "[p@tc?5
It is no1 likely that this transitional situation wit! continue very tong or the N/QiI.V6
evolutionary time scale. Fifty thousand ,years from now man's societies may have Z=5qX2fy1*
become so close-knit that the individuals retain no sense of separate personality. Q:C$&-$
Then little distinction will remain between the organic parts of the multiple organism X .F^$
and the inorganic parts (machines) that have been constructed by it. A million years /.Nov
智力服务于中国,提高企业与个人整体竞争力 第28 页 DHC+C4
further on man and his machines may' have merged as closely as the muscles of the b
IW'c_
,
human body and the nerve cells that set them in motion. (UCK;k
The explorers~ of space should be prepared for some such situation. If they. k^ F@X
Arrive on a foreign planet that has reached an advanced stage (and this is by' no iTh:N2/-vc
means impossible), they' may find it being inhabited by a single large organism h4pTq[4*
composed of many closely cooperating units. Kf
Coe[Vv
The units may be "'secondary,'" machines created millions of years ago by a bOp54WI-g
previous form of life and given the will and ability' to survive and reproduce. They e,_
-Je
may be built entirely of metals and other durable materials, if this is the case, i|)Su4Dw
they may be much more tolerant of their environment multiplying under conditions that { x0 t
would destroy immediately any organism made of carbon compound and dependent on the +|Hioq*,t
familiar carbon cycle. NC qo@vE
Such creatures might be relics of a past age, many millions of years ago, when kU-t7'?4
their planet was favorable to the origin of life or they might be immigrants from ZR v"h/~
a favored planet t&Os;x?To?
26 What does the word "cheer" (Para. 1, Line 2) imply? 8n BL\{'B[
A. Imaginative men are sure of success in finding life on other planets. I]"96'|N
B. Imaginative men are delighted to find life on other planets. e^YHJ>@
C. Imaginative men are happy to find a different kind of life existing on other Ch()P.n?
planets. ,h\s F#|
D. imaginative mea can be pleased with the idea that there might exist different forms . #Z+Z
of life on other planets. @pI5lh
27. Humans on Earth are characterized by y|&}.~U[
A their existence as free and separate beings "TV(H+1,z
B. their capability of living under favorable conditions c H-@V<
C. their great power and effectiveness 0,s$T2
D. their strong desire for living in a close-knit society #eU.p&Zc
28. According to this passage, some people believe that eventually __ 6J~12TU,
A. human societies will be much more cooperative j#~Jxv%n
B. man will live in a highly organized world KD1=Y8
0P
C. machines will take control over man z|7zj/+g
D. living beings will disappear from Earth _ 7PMmW@
29. Even most imaginative people have to admit that __ Nfe>3uQK
A. human societies are as advanced as those on some other planets }
7G8|54t
B. planets other than Earth are not suitable for life like ours to stay, kpbm4t
C. it is difficult to distinguish between organic parts and inorganic parts of the w#JJXXQI
human body jEc|]E
智力服务于中国,提高企业与个人整体竞争力 第29 页 U7xmC
D. organisms are more creative than machines $qF0ltUQ
30. It seems that the writer 6*l^1;U
A. is interested in the imaginary life forms V Km!Ri$
B. is eager to find a different form of life v{i7h|e
C. is certain of the existence of a new life form S~qZr
D. is critical of the imaginative people P3
c\S[F
Passage 4 H4OhIxK
Education is one of the key, words of our time. A man without an education, many z3t~}aL
of us believe, is at: unfortunate victim of unfortunate circumstances deprived of Y=Z1Tdxa|
one of the greatest twentieth-century opportunities. Convinced of the importance of ^ yh'lh/
education, modern states ‘invest', in institutions of learning to get back _ 46X%k
"interest" in the form of a large group of enlightened young men and women who are #B'aU#$u
potential leaders. Education. with its cycles of instruction so care fully worked D2YZ9e
out, punctuated by text-books--those purchasable wells of wisdom--what would e98lhu"|H
civilization be like without its benefits? 6m .k;'
So much is certain: that we would have doctors and preachers, lawyers and A392=:N+Q
defendants, marriages and birth; but our spiritual outlook would be different. We FZd.L6q
would lay less stress on "facts and figures" and more on a good memory, on applied 6#}93Dgv4
psychology,, and on the capacity of a man to get along with his fellow-citizens. If *?QE2&S:
our educational system were fashioned after its bookless past we would have the most ""O"
democratic form of "college" imaginable. Among the people whom we like to call savages I O%6 O
all knowledge inherited by tradition is shared by all; it is taught to every member z
eP}tzQO
of the tribe sc that in this respect everybody is equally, equipped for life. DPrBFmHF
It is the ideal condition of the "equal start" which only our most progressive UH@as
Forms of modern education try, to regain. In primitive cultures the obligation to T0Yiayt
seek and to receive the traditional instruction is binding to all. There are no bf_I9Z3m
"illiterates"—if the term can be, applied to peoples without a script while our h:XzUxL\
own compulsory school attendance became law in necessary in 1642, in France in
qLncn}oNM
1806, and in England in, 1976, and is still non-existent in a number of "civilized" SgMrce<;
nations. This shows how long it was before we deemed it necessary to make sure thin O#nR>1h
all on knowledge accumulated by the "happy few" during the past centuries. qP!eJ6[Nh"
Education in the wilderness is not a matter of monetary means. All are entitled 1ju#9i`.Wg
to an equal start. There is none of the hurry which, in our society, often hampers VS#wl|b8
the full development of a growing personality. There, a child grows up under the {vaaFs
ever-present attention of his parents; therefore the jungles and the savages know O<9~Kgd8h
of no "juvenile delinquency". No necessity of making a living away from home results d
"BW/%m|g
in neglect of children, and no father is confronted with his inability to "buy" an NIZ<0I*5
education for his child. -7WW[
w
智力服务于中国,提高企业与个人整体竞争力 第30 页 Uts"aQ
31. The best title for this passage is __ HDM<w+ZxX
A. The Significance of Education #LcrI
B. Educational Investment and Its Returns ?wMHS4
C. Education: A Comparison of Its Past and Its Present hf!|\f
D. Education in the Wilderness <Y
4:'L6
32. The word "interest" in paragraph one means __ 9L%I<5i
A. capital profit got back from the investment \8uo{#cL8
B. the things young people are interested in #)+- lP
e
C. the well-educated and successful young men and women y#ON|c
/
D. the well-educated young people with leadership potential ;N+$2w
33. The author seems Kj=gm .
A. against the education in the very early historic times P#kGX(G9!
B. positive about our present educational instruction Qz<d~N
C. in favor of the educational practice in primitive cultures {hSGv
D. quite happy to see an equal start for everyone Q+|{Bs)6i1
34. The passage implies that __ {!ZyCi19
A. some families now can hardly afford to send their children to school bTmL5}n
B. everyone today' has an equal opportunity in education iY[+Ywh
C. every, country invests heavily in education # jYpVc{]
D. we are not very certain whether preachers are necessary or not &Y|Xd4:
35. According to the passage, which of the following statement is true? n_[i0x7#
A. One without education today has no opportunities. +%J\y^09kr
B. We have not yet decided on our education models. 2)iD4G`
C. Compulsory schooling is legal obligation in several countries now. !&kL9A).
D. Our spiritual outlook is better now than before. UyYfpL"$A"
Passage 5 H{ M)-
Many, zoos in the United States have undergone radical changes in the 9pWy"h$H
philosophy and design. All possible care is taken to reduce the stress of living in dLh6:Gh8_I
captivity. Cages and grounds are landscaped to make gorillas feel immersed in A(6xg)_XQ
vegetation, as they would be in a Congo jungle. Zebras gaze across vistas arranged -
Q
e~)7
to appear (to zoos visitors, at least) nearly as broad as an African plain. Y8s;w!/
Yet, strolling past animals in zoo after zoo. I have noticed the signs A//?6OJx?
of hobbled energy that has found no release--large cats pacing in a repetitive mxTk+j=
pattern, primates rocking for hours in one corner of a cage. These truncated >X}{BDMb.
movements are known as cage stereotypes, and usually these movements bring +}7f
g82)
about no obvious physical or emotional effects in the captive animal. Many animal To"dG&h
specialists believe they, are more
I8m:3fL"
智力服务于中国,提高企业与个人整体竞争力 第31 页 0Vv9BL{
troubling to the people who watch than to the animals themselves. Such HB&
&
restlessness is an unpleasant reminder that--despite the careful interior ~&G4)AM
decoration and clever optical illusions--zoo animals are prisoners, being kept in uZjI?Z.A
elaborate cells. e29y7:)c=
The rationale for breeding endangered animals in zoos is nevertheless x/TGp?\g
compelling. Once a species falls below a certain number, it is beset by *$,+`+
inbreeding and other processes that nudge it closer and closer to extinction. $%qg"
If the animal also faces the whole-scale +H'\3^C-
destruction of its habitat, its one hope for survival lies in being J%v5d*$.
transplanted to some haven of safely, usually a cage. In serving as trusts for rare ija:H'j
fauna. zoos have committed millions of dollars to caring for animals. Many <+E%E4
zoo managers have given great consideration to the psychological health of the !e8i/!}^S
animals in their care. Yet the more I learned about animals bred in enclosures, -zfoRU v
the more I wondered how their sensibilities differed from those of animals raised ?X_V#8JK
to roam free. r2eQ{u{nX
In the wild, animals exist in a world of which we have little understanding. Ek .3
They may communicate with their kind through "language" that are 7[o {9Yp&
indecipherable by h u m a n s . A f e w s t u d i e s s u g g e s t t h a t s o m e s p ec i es p erceive 7 ^I:=qc72
l a n d s c a p e s m u c h differently than people do; for example, they max: be keenly \KM|f9-b
attuned to movement on the faces of mountains or across the broad span of grassy H^(L90
plains. Also, their social w=J4zkWk
structures may be complex and integral to their well-being. %me scientists uEd,rEB>
believe they may even develop cultural traditions that are key to the survival of }B)jq`a?|\
populations. J/Q|uRpmqr
But when an animal is confined, it lives within a vacuum. If it is X%4h(7;v
accustomed to covering long distances in its searches for food, it grows lazy or kV)'a
bored. It can make no decisions for itself; its intelligence and wild skills
(K
#A
atrophy from lack of use. becomes, in a sense, one of society's charges, Yo2Trh
completely dependent on humans for' nourishment and care. $L{7%]7QC
How might an animal species be changed--subtly, imperceptibly--by 7:o+iP4 6
spending several generations in a per:? I posed that question to the curator of f=ib9WbR#
birds at the San Diego Wild Animal Park, which is a breeding center for the 0|C[-ppr
endangered California condor. "I always have to chuckle when someone asks me zqGYOm$r
that," the curator replied. =lrN'$z?%
"Evolution has shaped the behavior of the condor for hundreds of years. If you R<g =\XO'y
think I can change it in a couple of generations, you're giving me a lot of credit." 1q!sKoJ<
Recently the condor was reintroduced into the California desert---only a )73DT3-0$
moment after its capture, in evolutionary terms. Perhaps the curator was right; $FCw$ +w
perhaps the wild nature of the birds would emerge unscathed, although I was not Ekf
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convinced. But what of species that will spend decades or centuries in bOXh|u_3i
confinement before they are released? oNSz&