2015年职称英语考试历年完美·体育(中国)官方网站,WANMEI SPORTS详解及全真模拟试卷A级(理工类) 随书超值赠..
- 所属分类：
- 作者：
全国职称英语考试命题研究中心 编著
- 出版社：
人民邮电出版社
- ISBN：9787115362025
- 出版日期：2014-9-1
-
原价：
￥39.80元
现价：￥0.00元
图书简介
第一部分 职称英语考试指南
一、职称英语考试介绍
二、职称英语考试题型分析
三、职称英语应试技巧与例题讲解
第二部分 职称英语考试历年完美·体育(中国)官方网站,WANMEI SPORTS详解及全真模拟试卷
2014年职称英语考试完美·体育(中国)官方网站,WANMEI SPORTS(理工类A级)
参考答案与解析
2013年职称英语考试完美·体育(中国)官方网站,WANMEI SPORTS(理工类A级)
参考答案与解析
2012年职称英语考试完美·体育(中国)官方网站,WANMEI SPORTS(理工类A级)
参考答案与解析
2011年职称英语考试完美·体育(中国)官方网站,WANMEI SPORTS(理工类A级)
参考答案与解析
2010年职称英语考试完美·体育(中国)官方网站,WANMEI SPORTS(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷一(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷二(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷三(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷四(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷五(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷六(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷七(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷八(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷九(理工类A级)
参考答案与解析
职称英语考试全真模拟试卷十(理工类A级)
参考答案与解析
目录
Europa, one of Jupiter's 63 known moons, looks bright and icy on the surface. But appearances canbedeceiving : Miles within its cracked, frigid shell, Europa probably hides giant pools of liquid water. Wherescientists find liquid water, they hope to find life as well.
Since we can't go diving into Europa's depths just yet, scientists instead have to investigate the moon'ssurface for clues to what lies beneath. In a new study, scientists investigated one group of strange ice patternson Europa and concluded that the formations mark the top of an underground pool that holds as much water asthe U. S. Great Lakes.
Pictures of Europa, which is slightly smaller than Earth's moon, clearly show a tangled, icy mishmash oflines and cracks known as "chaos terrains." These chaotic places cover more than half of Europa. For morethan 10 years, scientists have wondered what causes the formations. The new study suggests that they arisefrom the mixing of vast underground stores of liquid water with icy material near the surface.
For scientists who suspect that Europa also may be hiding life beneath its icy surface, the news about thenew lake is exciting.
"It would be great if these lakes harbored life, " Britney Schmidt, a planetary scientist who worked on thestudy, told Science News, "But even if they didn't, they say that Europa is doing something interesting andactive right now. "
Schmidt, a scientist at the University of Texas at Austin, and her colleagues wanted to know how chaosterrains form. Since they couldn't rocket to Europa to see for themselves, they searched for similar formationshere on Earth. They studied collapsed ice shelves in Antarctica and icy caps on volcanoes in Iceland. Thosefeatures on Earth formed when liquid water mixed with ice. The scientists now suspect something similarmight be happening on Europa : that as water and ice of different temperatures mingle and shift, the surfacefractures. This would explain the jumbled ice sculptures.
"Fracturing catastrophically disrupts the ice in the same way that it causes ice shelves to collapse on Earth, "Schmidt told Science News. She and her team found that the process could be causing chaos terrains to formquickly on Europa.
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