U.S. Scientists Confirm Water on
Mars NASA scientists said that Mars was covered once by vast lakes, flowing rivers and a variety of other wet environments that had the potential to support life. Laboratory tests aboard NASA’s Phoenix Mars Lander have identified water in a soil sample. The lander’s robotic arm delivered the sample Wednesday to an instrument that identifies vapors produced by the heating of samples. "We have water," said William Boynton of the University of Arizona, lead scientist for the Thermal and Evolved-Gas Analyzer, or TEGA. "This is the first time Martian water has been touched and tasted. " The robotic arm is a critical part of the Phoenix Mars mission. It is needed to trench into the icy layers of northern polar Mars and deliver samples to instrum A. They are from America. B. They are from Canada. C. They are from both America and Canada. D. They are from neither America nor Canada. [简答题]《铁路旅客运输规程》(铁运〔1997〕101号)规定,对无法交付物品中的枪支弹药、机要文件以及<--NRC-->的物品应及时交有关部门处理。
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A.每次使用前 B.每年 C.每月 [简答题]什么叫深挖路基?
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A.按鼠标右键,选“删除” B.直接按住左键拉到回收站中 C.双击左键,选“删除” D.按往左键,拉到桌面上其它地方 [单选题]营业机构从农商银行总部调入重要空白凭证,应先进行凭证调拨申请,经总部审核同意后,由总部凭证管理员双人配发,调入机构应双人签收、( )
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