[单项选择]It can be inferred from the passage that scientists are "perplexed by the means" (line 12) for which of the following reasons
A. They are unsure of how alanine remains separate from the everyday nitrogen metabolism of the plant itself.
B. They have yet to establish what function the alanine serves for the soybean plants.
C. They have thought alanine to exist only in very small quanties in rhizobia.
D. They have long considered the membranes of the soybean plant impermeable to amino acids.
E. They are uncertain how such a rapid export of fixed nitrogen is possible through the soybean membranes.

[单项选择]It can be inferred from the passage that from a historical perspective, the European conquest of the Americas can be viewed as
A. most similar to earlier successful conquests
B. most different from earlier failed conquests
C. most dissimilar to earlier successful conquests
D. most analogous to earlier failed conquests
E. unlike any earlier conquests in history, successful or not

[单项选择]
What can be inferred from the passage
A. If the parents are somkers, infants may suffer from breathing problems.
B. If the parents are smokers, their children will die.
C. If the parents are smokers, their children may have a fast lung growth.
D. If the parents give up smoking, their children will recover from lung diseases.

[单项选择]All the following can be inferred from the passage EXCEPT______.
A. The Trust is more interested in protecting the 16th century houses.
B. Many people came to visit the historic houses saved by the Trust.
C. Visitors can get free access to some places owned by the Trust.
D. The Trust has a story which is longer than 80 years.

[单项选择]It can be inferred from that passage that hearing differs from seeing and tasting because it
A. is primarily analytic in its tendency to separate the qualities of different sounds from one another
B. does not rely on the operation of more than one type of neuron, unlike visual or gustatory perception
C. uses individual neurons, not groups, in order to discriminate between various stimuli
D. is primarily synthetic, in that each combination of sound produces a unique quality for the ear
E. uses neurons which respond to only a single major stimulus, without producing minor effects for minor stimuli

[单项选择]It can be inferred from the passage that chimpanzees are characterized by
A. brains that use less overall body energy than the percentage humans use
B. the posession of less total body weight than the average human weight
C. a total resting energy equal to that of human resting energy
D. a diet completely devoid of rich foods preferred by more developed species
E. a higher ratio of brain weight to body weight

[填空题]What can be inferred from the passage The insects need not fear the force of gravity because they are so ______ in weight.

[单项选择]It can be inferred from the passage that children normally learn simple counting______.
A. soon after they learn to talk
B. by looking at the clock
C. when they begin to be mathematically mature
D. after they reach second grade in school

[单项选择]It can be inferred from the passage that evidence for continental drift has been provided by the
A. correspondences between coastal contours
B. proof of an original solitary land mass
C. level of sima underlying the continents
D. immobility of the African continent
E. relative heaviness of the continental masses

[填空题]It can be inferred from the passage that counting is farther up ______.

[单项选择]It can be inferred from the passage that Anderson would be most likely to agree with which of the following statements regarding the persistence of imperial authority in French Canada
A. The persistence of imperial authority most likely would have failed to offer as much protection to native Americans as it did to European settlers.
B. The persistence of imperial authority would have likely resulted in less profit for England in terms of revenue and territory than the actual withdrawal that occurred.
C. The persistence of imperial authority would likely have limited in an enduring fashion the sovereignty and self-rule of the European colonists.
D. George the III minister’s were not sufficiently interested in retaining control over French Canada to effect any changes in their colonial policy.
E. The "American" character of Britain’s North American empire and British metropolitan authority would not have been affected even if British imperial authority had withdrawn more quickly.

[单项选择]It can be inferred from the passage that classicism has which of the following characteristics
Ⅰ. Sensitivity toward emotional promptings
Ⅱ. Emphasis on formal aesthetic criteria
Ⅲ. Meticulous planning of artistic works
A. Ⅱ only
B. Ⅲ only
C. Ⅰ and Ⅱ
D. Ⅱ and Ⅲ
E. Ⅰ, Ⅱ, and Ⅲ

[单项选择]It can be inferred from the passage that one reason scientists consider local water from the solar nebula a necessary ingredient in the earth’s oceans is that
A. it is improbable that enough volume of water from comets existed to fill the earth’s oceans
B. the water from the solar nebula contains less deuterium than sea water
C. the water from the solar nebula existed close enough to the earth to participate in the accretion process
D. without the water from the solar nebula more xenon would otherwise exist in seawater
E. without the water from the solar nebula the earth’s oceans would probably have formed at an earlier time

[填空题]It can be inferred from the passage that the economic foundation of society is dependent on______.

[单项选择]It can be inferred from the passage that the author would be most likely to agree with which of the following statements about the role of criticism
A. Its prime office should be to make our enjoyment of the things that feed the mind as conscious as possible.
B. It should be a disinterested endeavor to learn and propagate the best that is known and thought in the world.
C. It should enable us to go beyond personal prejudice to appreciate the virtues of works antipathetic to our own tastes.
D. It should dwell upon excellencies rather than imperfections, ignoring such deficiencies as irrelevant.
E. It should strive both to purify literature and to elevate the literary standards of the reading public.