GRE入学测试题20.docx

1、GRE入学测试题20 GRE测试题一.选出能取代划线部分的单词（每题1分）1.Although she gives badly _ titles to her musical compositions, they _ unusual combinations of materials including Gregorian chant, Asian scale patterns and rhythms, electronic sounds, and bird songs.A. exotic belie B. eccentric deploy C. traditional exclude D.

2、imaginative disguise E. conventional incorporate2. In arguing against assertions that environmental catastrophe is imminent, her book does not ridicule all predictions of doom but rather claims that the risks of harm have in many cases been _.A. exaggerated B. ignoredC. scrutinized D. derided E. inc

3、reased3.Despite a tendency to be overtly _, the poetry of the Middle Ages often sparks the imagination and provides lively entertainment, as well as pious sentiments.A. diverting B. emotional C. didacticD. romantic E. whimsical4. There seems to be no _ the reading publics thirst for books about the

4、1960s: indeed, the normal level of interest has _ recently be cause of a spate of popular television documentaries.A. quenching moderated B. whetting mushroomedC. curtailing warned D. ignoring transformed E. slakingincreased5. The scientist found it puzzling that his theory encountered _ despite wid

5、espread agreement that it was_。A. respect crucial B. dismissal simplisticC. skepticism unfathomable D. opposition indisputableE. acceptance comprehensive6. The ideas expressed in the art historians book are more _ than one would expect or the basis of her rather_ treatment of her subject in the open

6、ing pages.A. compelling intriguing B. accessible reconditeC. hidebound reactionary D. insightful innovativeE. dispassionate evenhanded7. The history of film reflects the _ inherent in the medium itself: film combines still photographs to represent continuous motion and, while seeming to present life

7、 itself, can also offer impossible and dreamlike unrealities.A. trivialities B. biases C. constraintsD. paradoxes E. liabilities8. Art that endures often makes an initially disturbing impact: the profound experience that such art seeks to provoke necessarily engenders a certain _。A. familiarity B. e

8、nnui C. upheavalD. intimacy E. tranquility9.Recent research in linguistics suggests that some language skills are not_ skills, but are passed down through our genetic code.(A) communicative (B) fluent (C) acquired(D) hereditary. (E) challenging10.The _ with which the politician peppers her speeches

9、are so memorable that many people think of her as being far more _ than she in fact isA. superlatives egalitarian B. pejoratives optimisticC. examples soporific D. diatribes censoriousE. malapropisms straightforward二.阅读题（每题2分）As people age, their cells become less efficient and less able to replace

10、damaged components. At the same time their tissues stiffen. For example, the lungs and the heart muscle expand less successfully, the blood vessels (5) become increasingly rigid, and the ligaments and tendons tighten. Few investigators would attribute such diverse effects to a single cause. Neverthe

11、less, researchers have discov-ered that a process long known to discolor and toughen (10)foods may also contribute to age- related impairment of both cells and tissues. That process is nonenzymatic glycosylation, whereby glucose becomes attached to pro-teins without the aid of enzymes. When enzymes

12、attach glucose to proteins (enzymatic glycosylation), they do so (15)at a specific site on a specific protein molecule for a specific purpose. In contrast, the nonenzymatic process adds glucose haphazardly to any of several sites along any available peptide chain within a protein molecule. This none

13、nzymatic glycosylation of certain proteins (20)has been understood by food chemists for decades, although few biologists recognized until recently that the same steps could take place in the body. Nonenzymatic glycosylation begins when an aldehyde group (CHO) of glucose and an amino group (NH2) of a

14、 protein are (25)attracted to each other. The molecules combine, forming what is called a Schiff base within the protein. This com-bination is unstable and quickly rearranges itself into a stabler, but still reversible, substance known as an Amadori product.(30) If a given protein persists in the bo

15、dy for months or years, some of its Amadori products slowly dehydrate and rearrange themselves yet again, into new glucose-derived structures. These can combine with various kinds of mol-ecules to form irreversible structures named advanced (35)glycosylation end products (AGEs). Most AGEs are yellow

16、ish brown and fluorescent and have specific spec-trographic properties. More important for the body, many are also able to cross-link adjacent proteins, particularly ones that give structure to tissues and organs. Although (40)no one has yet satisfactorily described the origin of all such bridges be

17、tween proteins, many investigators agree that extensive cross-linking of proteins probably contrib-utes to the stiffening and loss of elasticity characteristic of aging tissues.(45) In an attempt to link this process with the develop-ment of cataracts (the browning and clouding of the lens of the ey

18、e as people age), researchers studied the effect of glucose on solutions of purified crystallin, the major protein in the lens of the eye. Glucose-free solutions (50) remained clear, but solutions with glucose caused the proteins to form clusters, suggesting that the molecules had become cross-linke

19、d. The clusters diffracted light, making the solution opaque. The researchers also discovered that the pigmented cross-links in human (55)cataracts have the brownish color and fluorescence characteristic of AGEs. These data suggest that nonenzymatic glycosylation of lens crystallins may contribute t

20、o cataract formation.17.With which of the following statements concerning the stiffening of aging tissues would the author most likely agree?(A) It is caused to a large degree by an increased rate of cell multiplication.(B) It paradoxically both helps and hinders the longevity of proteins in the hum

21、an body.(C) It can be counteracted in part by increased ingestion of glucose-free foods. (D) It is exacerbated by increased enzymatic glycosylation. (E) It probably involves the nonenzymatic glycosylation of proteins. 18. According to the passage, which of the following statements is true of the pro

22、cess that discolors and toughens foods?(A) It takes place more slowly than glycosylation in the human body.(B) It requires a higher ratio of glucose to protein than glycosylation requires in the human body.(C) It does not require the aid of enzymes to attach glucose to protein. (D) It proceeds more

23、quickly when the food proteins have a molecular structure similar to that of crystallin proteins. (E) Its effectiveness depends heavily on the amount of environmental moisture. 19. According to the passage, which of the following is characteristic of enzymatic glycosylation of proteins?(A) AGEs are

24、formed after a period of months or years.(B) Proteins affected by the process are made unstable. (C) Glucose attachment impairs and stiffens tissues.(D) Glucose is attached to proteins for specific purposes. (E) Amino groups combine with aldehyde groups to form Schiff bases. 20. According to the pas

25、sage, which of the following statements is true of Amadori products in proteins?(A) They are more plentiful in a dehydrated environment. (B) They are created through enzymatic glycosylation.(C) They are composed entirely of glucose molecules. (D) They are derived from Schiff bases. (E) They are deri

26、ved from AGEs 21. Which of the following best describes the function of the third paragraph of the passage (lines 19-29)?(A) It offers evidence that contradicts the findings described in the first two paragraphs.(B) It presents a specific example of the process discussed in the first two paragraphs.

27、 (C) It explains a problem that the researchers mentioned in the second paragraph have yet to solve. (D) It evaluates the research discoveries described in the previous paragraph.(E) It begins a detailed description of the process introduced in the previous two paragraphs. 二.数学题（每题2分） 1. A rectangul

28、ar parking lot 2x feet long and x feet wide is to be enlarged so that the lot will be 2 times as long and 3 times as wide as it is now. The area of the enlarged rectangular lot will be how many times the area of the present lot?(A) 6(B) 5(C) 4(D) 3(E) 22.If 2x = 5 and 3y = 8, then =(A) (B) (C) (D) (

29、E) Questions 3-5 refer to the following graph.3. The two corporate sectors that increased their support for the arts from 1988 to 1991 made a total contribution in 1991 of approximately how many million dollars?(A) 112(B) 125(C) 200(D) 250(E) 3154. How many of the six corporate sectors listed each contributed more than $60 million to the arts in both 1988 and 1991?(A) One (B) Two(C) three(D) Four(E) Five5. Approximately how many million dollars more did the wholesale sector contribute to the arts in 1988 than in 1991?(A) 10.4(B) 12.6(C) 14.0(D) 16.5(E) 19.2