Space travel can be so delightful but at the same time invisibly dangerous. For instance, astronauts lose bone mass. That’s why exercise is considered so vital that National Aeronautics and Space Administration (NASA) puts it right on the workday schedule. The focus on fitness is as much about science and the future as it is about keeping any individual astronauts return home, and, more importantly, how to maintain strength and fitness for the two and a half years or more that it would take to make a round-trip to Mars.
63.What is the major challenge to astronauts when they sleep in space?
A. Deciding on a proper sleep position
B. Choosing a comfortable sleeping bag
C. Seeking a way to fall asleep quickly
D. Finding a right time to go to sleep.
64.The astronauts will suffer from a carbon-dioxide headache when _____.
?A. the y circle around on their bikes
B. they use microcomputers without a stop
C. they exercise in one place for a long time
D. they watch a movie while pedaling
65.Some astronauts feel sick on the station during the first few days because _____.
A. their senses stop working
B. they have to stand up straight
C. they float out of their seats unexpectedly
D. whether they are able to go back to the station
【近三年高考(2017-2016)英语试题分项版解析:专题16 科普类说明文(原卷版)】相关文章:
★ 山西省永济市涑北中学高三英语总复习:美文欣赏(2)(Love and Time)
★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题12 人物类话题指导(学生版)
★ 天津市武清区杨村第四中学2016届高考英语一轮复习语法专题六《定语从句》课件外研版
★ 2017年高考英语二轮复习精品资料:专题16 书面表达(押题专练)(原卷版)
★ (安徽专用)2014届高考英语一轮复习方案 作业手册(10)模块4 《Unit 10 Money》(含解析) 北师大版必修1
★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题02 报道评论话题指导(学生版)
★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题07 建议申请话题指导(学生版)
★ 2017年高考英语二轮复习精品资料:专题15 完形填空(押题专练)(原卷版)
★ 2017年高考英语二轮复习精品资料:专题14 阅读理解(教学案)(原卷版)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21