28.A.unless
B.even if
C.as if
D.before
29.A.reply
B.attitude
C.opinion
D.determination
30.A.to be honest
B.in that case
C.after all
D.strictly speaking
Ⅲ.阅读理解
Surface Exploration. Robots make great explorers on planets,moons,and other landing areas.Aside from Earth,just about every surface in the solar system is unsafe for humans to explore.The air on most other planets is insufficient for humans to breathe,making it necessary to wear a space suit and oxygen equipment.The temperatures on these surfaces are much too hot or much too cold for any humans to withstand.Plus there would be complications with radiation,weather,and a lack of gravity.Robots have much less limitation in these areas and can survive much longer under these conditions.
Data Collection. Robots are designed for collecting scientific data.Robots are also able to perform many tasks at one time and can process information much quicker and more efficiently.Important scientific projects from detecting minerals,analyzing ground samples,and finding water are all performed much quicker and more accurately(精确地)by robots.
Cost Effective. The use of robots has made the cost of space exploration much less expensive than it would cost for humans to do the work.In order to successfully send humans into space we would need to build a vehicle that can not only carry humans,but also have enough food and water to keep them alive for the duration of the trip.Moreover,robots have no problems working for hours on end.Robots never complain,they don't require food or water,and they never need a bathroom break.
【2017届高考英语一轮复习课时作业14:Unit 4《Astronomy the science of the stars》(人教版必修3湖北专用)】相关文章:
★ 【北京专用】2014届高考英语一轮复习方案课时作业:必修3 Unit 1 Festivals around the world
★ 北京市2014高考英语一轮复习 练习手册(22)必修5 Unit 2 The United Kingdom(含解析)新人教版
★ (安徽专用)2014届高考英语一轮复习方案 作业手册(11)模块4 《Unit 11 The Media》(含解析) 北师大版必修1
★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单:模块6 Unit 2《What is happiness to you》
★ 四川省2016届高考英语一轮复习课时作业(44) Module 2 The Renaissance 外研版选修8
★ 2014届高考英语一轮复习课时作业(三)必修1Module 3《My First Ride on a Train》(外研版)
★ 【北师大版】2014届高考英语一轮复习指导课时作业:Unit 9 A卷 Word版含解析
★ 【北京专用】2014届高考英语一轮复习方案课时作业:必修1 Unit 5 Nelson Mandela
★ 四川省2016届高考英语一轮复习课时作业(31) Module1 Small Talk 外研版选修6
★ (安徽专用)2014届高考英语一轮复习方案 作业手册(13)模块5 《Unit 13 People》(含解析) 北师大版必修1
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21