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  3. Young discoverers need not despair—though there are few blanks left on today’ s map of the world, there are still unexplored rea

Young discoverers need not despair—though there are few blanks left on today’ s map of the world, there are still unexplored rea

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问题     Young discoverers need not despair—though there are few blanks left on today’ s map of the world, there are still unexplored realms to be charted in the depths of the oceans, the most remote recesses of the rain forests and the furthest reaches of outer space. Some scientists speculate there maybe 10 million species—perhaps even 100 million—living on the ocean floor that are yet to be discovered. Recent research suggests that all told some 90% of the world’ s plants and before they are even described and named(that is, if their habitats are not destroyed before they are even found). Given these remarkable statistics, it’ s clear that the physical world still offers intrepid explorers new frontiers of discovery.
    In this section on recent discoveries of the world around us, TIME travels 500m beneath the surface of the Pacific Ocean with Bruce Robison as he encounters a new species of luminous "jelly ," we make our way deep into the world’ s tropical rain forests, where more than half of all life-forms on the planet live; we look into outer space to examine the role asteroids may have played in mass extinctions of the past and the potential threat they pose to our own civilization; and we ask whether there is life—intelligent or otherwise—elsewhere in the universe.
    John Hemming, former director of London’ s royal Geographical Society, arguably the world’ s epicenter of exploration, defines an explorer as someone "who goes to the edge of knowledge and brings back something new. " The people profiled in this section fit that description perfectly. The discoveries they have brought back from their explorations form new pieces in the puzzle of how the world works. As the pieces fit together, we get a glimpse of what a strange and beautiful mosaic it is.
The last paragraph tells us______.
选项 A、what an explorer does
B、why explorations are carried out
C、how scientists study the universe
D、the effects of scientific discoveries on man
答案A
解析 文章最后一段主要讲述了explorer的定义，也就是告诉我们探险家都需要做什么。
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