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  3. Scientist s Discovered of Water on the Moon Over the past year,scientists have found more and more convincing evidence that

Scientist s Discovered of Water on the Moon Over the past year,scientists have found more and more convincing evidence that

admin2013-07-08  56
问题                     Scientist s Discovered of Water on the Moon
    Over the past year,scientists have found more and more convincing evidence that the moon, once thought desert dry, holds significant amounts of water ice within the deep, eternally dark craters near the south pole. The evidence turned conclusive with the deliberate crash of a NASA spacecraft into one of the craters last October, kicking up about 26 gallons of water.
    The effort was focused on the south pole, with its larger and deeper craters, but last week, scientists reported there is also ice in craters near the north pole. And not just a dusting of frost. Within 40 small craters, one to nine miles wide,they estimated 600 million metric tons of water. Perhaps most notably, "It has to be relatively pure," said Paul Spudis, the principal investigator for the instrument that made the discovery.
    That is significant, because the ice in these craters could be easily tapped by future lunar explorers—not just for drinking water, but also broken apart into oxygen for breathing and hydrogen for fuel. In the previous findings, scientists could not rule out the possibility that the water was sparse or locked up within rocks and difficult to extract.
    Dr. Spudis, a scientist at the Lunar and Planetary Institute in Houston, said he guessed the water ice in the north polar craters might be 90 percent pure. He said the team was currently analyzing data covering the south pole craters. The findings were reported at the Lunar and Planetary Science conference last week and will appear in the journal Geophysical Research Letters.
    A similar experiment in 1994 aboard the Clementine probe, a joint effort between NASA and the Department of Defense, first revealed hints of water ice near the south pole, but the interpretation of the data remained controversial. The newer instrument is much more sensitive, and another copy of the experiment is currently operating aboard NASA’s Lunar Reconnaissance Orbiter.
    In addition to the water near the poles, scientists also reported that a very thin layer of water covers much of the lunar surface. Water, it appears, not only exists, but is also moving around. "The moon is working in a way you didn’t expects," Dr. Spudis said.
What is the significance of finding water in craters on the moon?
选项 A、The finding makes it easy to extract water from rocks.
B、The water found is 90 percent pure by analyzing the data.
C、The finding makes it possible for lunar explorers to live there.
D、The finding can provide sufficient drinking water for lunar explorers.
答案C
解析 推理判断题。根据题干关键词significance定位到文章第3段第1句：That issignificant，because．．．，but also broken apart into oxygen for breathing and hydrogen for fuel．说明这项发现意义重大，因为陨石坑中的冰可以被未来的探月者轻松地开发，不仅可以作为饮用水，还可以被分解成氧和氢，从而供人呼吸和做燃料使用，所以这项发现的意义就在于[C]“使月球探险家可以在那里生存”。
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