GRE测试题
1.Although she gives badly _______ titles to her musical电力
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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. imaginative … disguise
E. conventional … incorporate
2. 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. ignored
C. scrutinized
D. derided
E. increased
3.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.寻星计算程序
A. diverting
B. emotional
C. didactic
D. romantic
E. whimsical
4. There seems to be no ________ the reading public’s thirst for
books about the 1960’s: indeed, the normal level of interest has ______ recently be cause of a spate of popular television documentaries.
A. quenching … moderated
B. whetting … mushroomed
C. curtailing … warned
D. ignoring … transformed
E. slaking…increased
5. The scientist found it puzzling that his theory encountered _______ despite widespread agreement that it was_______。
A. respect … crucial
B. dismissal … simplistic
C. skepticism … unfathomable
D. opposition … indisputable
E. acceptance … comprehensive
6. The ideas expressed in the art historian’s book are more _____ than one would expect or the basis of her rather_________ treatment of her subject in the opening pages.
A. compelling … intriguing
B. accessible … recondite
C. hidebound … reactionary
D. insightful … innovative
E. dispassionate … evenhanded
7. 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 itself, can also offer impossible and dreamlike unrealities.
A. trivialities
蝇蛆蛋白B. biases
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C. constraints
D. paradoxes
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E. liabilities
8. 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. ennui
C. upheaval
D. intimacy
E. tranquility
9.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) challenging
10.The ______ with which the politician peppers her speeches are so memorable that many people t
hink of her as being far more _______ than she in fact is……
A. superlatives … egalitarian
B. pejoratives … optimistic
C. examples … soporific
D. diatribes … censorious
E. malapropisms … straightforward
二.阅读题（每题2分）
As people age, their cells become less efficient and
less able to replace 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. Nevertheless, 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 attach glucose to proteins (enzymatic glycosylation), they do so (15)at a specific site on a specific protein molecule for a
定向扬声器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 nonenzymatic 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 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 body 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 (AGE's). Most AGE's are
yellowish 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 between 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-
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