单项选择题
Among "humanity's current problems"( Par
A.3), the chief concern of the scientists is ________.A. the impoverishment of developing countriesB. the explosion of the human populationC. the reduction of biological diversityD. the effect of global warming
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单项选择题
Why does the author say that the protection of endangered species is a highly controversial issue
A.Because people can't agree as to what species to protect.
B.Because it is difficult to find an effective way to protect such species.
C.Because it affects the interests of certain groups of people.
D.Because it is a major problem involving a series of legal procedures.
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单项选择题
The author's purpose in writing this passage is ________.
A.to describe the difficulties in solving humanity's current problems
B.to present the different views on humanity's current problems
C.to analyze the contradiction between countries in dealing with humanity's current problems
D.to point out that humanity's current problems can only be solved through the cooperation of nations
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