题目内容

People can't survive without plants.

A. Right
B. Wrong
C. Not mentioned

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Part science and part natural history, ornithology(鸟类学) owes its tremendous popularity as a science and a scientific recreation to a simple circumstance that is sometimes forgotten when we weigh the eligibility(有被选资格，合适)of different kinds of animals for informal study. Birds are day animals where others, just as engaging in their way—mice, for instance—are creatures of the night. Apart from their visibility (something very much in their favor), the beauty of birds and their many appealing habits have won for them a huge fan following that has more than once tempted impatient and ill-informed laboratory biologists to dismiss ornithology as so much bird-watching—an absurdly unjust judgment that ignores the fact that ornithology has made a number of profoundly important contributions to general biology.
Professional biologists are not hard put to reel off(滔滔不绝地讲) a list of distinctive contributions that ornithology has made to general biology science. They will cite, for example, Ernst Mayr's investigations of evolution and the mechanisms of speciation (物种形成), or M. R. Irwin's work on the immunologic performance of species of Columbidae(pigeons and doves) and of hybrids(杂交种)between them. Then again, David Lack's studies on mortality in wild populations of birds are the most illuminating life tables of wild animals and animal demography (统计学) generally. Most important of all, perhaps is the contribution that ornithology has made to the study of animal behavior, beginning with Julian Huxley' s classic study of the courtship habits of the great crested great and followed by Niko Tinbergen's studies on the behavior. of herring gulls.
What is the main idea of the passage？

A. Birds are widely studied because they are popular in the home.
B. Ornithology has made important contributions to biology.
C. Professional biologists often engage in bird-watching for recreation.
D. Animal behavior. is best studied by observing birds.

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黄河公司2008年12月31日对甲公司长期股权投资账户的账面余额是()万元。

A. 1000
B. 1022
C. 1079
D. 1082

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If the author's assessment of the use of heat pumps (in the first paragraph) is correct, which of the following best expresses the lemon that advertisers should learn from this case？

A. Do not make exaggerated claims about the products you are trying to promote.
B. Focus your advertising campaign on vague analogies and veiled implications instead of on facts.
C. Do not use facts in your advertising that will strain the prospective client' s ability to believe.
Do not assume in your advertising that the prospective clients know even the most elementary scientific principles.

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Why does the author mention the Weddell Sea？

A. To show that this body of water has salinity variations.
B. To compare Antarctic waters with Arctic waters.
C. To give an example of cold-water salinity.
D. To point out the location of deep waters.

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People can't survive without plants.

A. Right B. Wrong C. Not mentioned

黄河公司2008年12月31日对甲公司长期股权投资账户的账面余额是()万元。

If the author's assessment of the use of heat pumps (in the first paragraph) is correct, which of the following best expresses the lemon that advertisers should learn from this case？

Why does the author mention the Weddell Sea？

A. Right
B. Wrong
C. Not mentioned