考点规范练20(选修7 Unit 20)
.阅读理解
A
(2016云南昆明三中第三次综合测试)
Mars(火星) appears to be flowing with small streams of salty water,at least in the summer,scientists reported Monday.“It suggests that it would be possible for there to be life today on Mars,” NASA’s science mission chief,John Grunsfeld,said at a news conference on September 28,2015.
The streams are about 12 to 15 feet wide and 300 feet or more long,scientists said.“What we’re dealing with is wet soil,thin layers of wet soil,not standing water,” said Alfred McEwen of the University of Arizona at Tucson,the principal scientist for the Mars Reconnaissance Orbiter’s high-resolution imaging experiment.
Because liquid water is essential to life,the findings could have major implications for the possibility of Martian life.The researchers said further exploration is needed to determine whether microscopic life exists on the planet.
The presence of liquid water could also make life easier for astronauts visiting or living on Mars.Water could be used for drinking and for creating oxygen and rocket fuel.NASA’s goal is to send humans there in the 2030s.
The evidence of flowing water consists largely of dark,narrow streaks (条痕) on the surface that tend to appear and grow during the warmest Martian months and fade the rest of the year.
【2017届高考英语一轮复习考点规范练:20 选修7 Unit 20(北师大版含解析)】相关文章:
★ 【课堂新坐标】2017届高考英语(通用版)二轮复习书面表达专题训练:训练4 书信、邮件+议论文(Ⅱ)(含解析)
★ 【三维设计】2017届高考英语(江苏专用)二轮复习阅读理解解题技法示范课件:4
★ 2017届高考英语二轮复习大题冲关秘籍短文改错:创新押题(含解析)
★ 【三维设计】2017届高考英语(江苏专用)二轮复习课件:必修3 Unit 1《The world of our senses》
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (35)
★ 【浙江专用】2014届高考英语一轮复习课时作业(四十)选修8Unit 5《Meeting your ancestors》
★ (全国通用)2014届高考英语一轮单元复习 限时强化训练十
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练:8(含解析)
★ 【三维设计】2017版(江苏专用)二轮复习练习:必修4 Unit 1《Advertising》单元检测(含解析)
★ 2014年牛津译林版高中英语总复习(第1轮)同步练习 M2《Unit 2 Wish you were here》Word版含解析
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21