[单项选择]According to the passage, the work of scientists is similar to that of equations in infinitesimal calculus because scientists
A. (A) work to explain concepts that are abstract in nature, not unlike infinity
B. (B) recognize that meaning is not the only benefit of scientific endeavor
C. (C) are unable to explain their work in any more concrete terms than mathematicians express theirs
D. (D) can discover a series of more and more precise truths, but can never achieve absolute accuracy
E. (E) are intrinsically more interested in formulas and theories than the predictions that can be made by them

[单项选择]According to the passage, scientists cannot explain which of the following aspects of squirrel behavior
A. Where squirrels store their acorn caches
B. Why squirrels prefer acorns over other seeds
C. Why squirrels eat only a portion of each acorn they retrieve
D. Why squirrels prefer acorns from a particular species of oak trees

[单项选择]According to the passage, scientists have positively confirmed that the brains of narcoleptics differ from those of normal brains in which of the following ways
A. (A) Narcoleptic brains tend to remove degenerative tissue at a more prolific rate than that of nonnarcoleptics.
B. (B) Narcoleptics are less responsive to drugs which treat neural autoimmune dysfunction than are nonnarcoleptics.
C. (C) Nonnarcoleptics do not possess the same neurological immune antigens as narcoleptics.
D. (D) Neurons that control muscle tone are damaged in the brains of narcoleptics, but not in those of non-narcoleptics.
E. (E) Narcoleptics experience greater neural degeneration as a result of aging than do nonnarcoleptics.

[单项选择]According to the passage, scientists have decided that sulfur aerosols from volcanic eruptions affect global temperatures to a greater extent than ash clouds because
A. (A) the greenhouse gas effect produced by human activities tends to have a much greater environmental effect than that of volcanic explosions
B. (B) clouds of sulfur-rich gases tend to achieve greater heights in the stratosphere than do ash clouds
C. (C) a particular explosion producing high sulfur and little ash had a greater environmental effect than the converse
D. (D) the burning of fossil fuels tends to exacerbate the effects of sulfurous aerosols, but not those of ash clouds
E. (E) global warming effects tend to minimize the impact of ash clouds, but not those of sulfurous aerosols

[单项选择]According to the passage, scientists have discovered that influenza viruses ______ .
A. cause ill health in wild birds
B. do not always cause symptoms in birds
C. are rarely present in wild birds
D. change when transferred from animals to man

[单项选择]According to the passage, scientists are skeptical toward their equations because scientists ______.
A. work to explain real, rather than theoretical or simplified situations
B. know that well-defined problems are often the most difficult to solve
C. are unable to express their data in terms of multiple variables
D. are unwilling to relax the axioms they have developed

[单项选择]According to the passage, scientists have concluded which of the following from the discovery of the large amount of deuterium found in comets

[单项选择]According to the passage, scientists used to think that the X-rays were produced by ______.
A. making sparks in laboratory
B. discharges of high-energy electron in the Sun, in exploding stars, and in lightning
C. electrons escaping their normal connections
D. radio waves

[单项选择]According to the passage, what will scientists most probably do in the future
A. They will work hard to reduce ocean noise pollution.
B. They will protect animals from harmful noises.
C. They will try to set a limit of 120 decibels.
D. They will study the effect of ocean noise pollution.

[单项选择]According to the passage, standardized tests work most effectively when ______.

[单项选择]According to the passage, the work of Meredith is noteworthy for its elements of
A. (A) sensibility and artistic fervor
B. (B) ambivalence and moral ambiguity
C. (C) tension and sense of vitality
D. (D) brilliance and linguistic grandeur
E. (E) wit and whimsical frivolity

[单项选择]According to the passage, scientists failed to______
A. discover the characteristic of nuclear process
B. discover the nature of uranium ore
C. save the life of uranium miners
D. store nuclear wastes in underwater tanks

[单项选择]According to the passage, the new design work involves
A. other artists as well.
B. other writers as well.
C. only the cover artist.
D. only the art director.

[单项选择]According to the passage, we cannot work all the time without ______.
A. taking part in sports activities
B. watching sporting events on television
C. listening to sporting events on the radio
D. recreation

[单项选择]According to the passage, cultural accommodation is promoted by ______.

[单项选择]According to the passage, extending solar record is important for which of the following reasons

[单项选择]According to the passage, "I can shut my eyes" means ______.

[单项选择]According to the passage, which of the following is true concerning the cultural ermination of emotions
A. (A) Emotional expression varies between individuals to a significantly greater extent than it does between cultures.
B. (B) Neither anthropologists nor Darwinists have successfully established a scientific method for comparing one emotion with another.
C. (C) The cause of the emotion may vary from one historical time or geographical place to another.
D. (D) It is impossible to say whether any given emotion is in fact an emotion, or merely a biological response.
E. (E) It is difficult to distinguish between culturally-acquired emotions and innate ones determined by biology.