首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are. Food for space has t
Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are. Food for space has t
admin
2014-03-13
37
问题
Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are.
Food for space has to be packed in special ways. Some of it goes into tubes that a man can squeeze into his mouth. Bite-sized cookies are packed in plastic.
There is a good reason for covering each bite. The plastic keeps pieces of food from traveling in the spaceship. On the earth very small pieces of food would simply fall to the floor. But gravity doesn’t pull them to the floor when they are out of the plastic in a spaceship. (78) They move here and there and can get into a man’s eyes or into the spaceship’s instruments. If any of the instruments is blocked, the astronauts may have trouble getting safely home.
As astronauts travel on longer space trips, he must take time to sleep. An astronaut can fit himself to his seat with a kind of seat belt. Or, if he wants to, he can sleep in a sleeping bag which is fixed in place under his seat. But be careful he must put his hands under the belt when he goes to sleep. This is because he is really afraid that he might touch one of controls that isn’t supposed to be touched until later.
In a spaceship, astronauts can________
选项
A、walk just as they do on the earth
B、not eat anything because it’s dangerous
C、control the spaceship when they are sleeping
D、not litter small things or it will make trouble
答案
D
解析
推理判断题。可以用排除法。在宇宙中,由于失重,宇航员不可能像在地球上一样行走,所以A不对。因为食物也像宇航员一样失重,吃东西就会变得非常困难,而不存在危险,所以B也不对。为了防止在睡眠中不小心触摸控制键,宇航员要将双手放在安全带下,因此他睡着的时候是不能控制宇宙飞船的,这样C也排除了。为了防止小东西由于失重飞到人眼睛里或机械中,宇航员是不能到处乱扔东西的,所以只有D是正确的。
转载请注明原文地址:https://kaotiyun.com/show/PsxO777K
0
成人本科学位英语
相关试题推荐
Peopledonotlikesuchpersonswhoarealways______thewayofothers.
Historyisthestoryof______happenedtothepeoplebeforetoday.
Whatdoesthepassagemainlydiscuss?Accordingtothepassage,whatdidthePuritansexpectfrommarriedwomen?
Don’t______toletmeknowifthereisanythingIcandoforyou.
Accordingtothepassage,Americansexpectspeakersandwritersto______.InordertocommunicatewithAmericanssatisfactoril
Factoryworkers(hadto)work(veryhard)before,(so)(hadfarmers).
—YoumustgetexcitedaboutgoingtoFrancetostudyoilpainting.—______,butI’mafraidIcan’tdowellbecausemyFrenchis
记者意识到女孩很害怕,而且尽力地回避问题。
W:Howwasthejobinterview?Ithinkyoumakeagoodjournalist(记者).M:______
我已了解清楚,她的结论是以事实为根据的。
随机试题
阅读下面程序importjava.io.*;publicclassTypeTransition{publicstaticvoidmain(Stringargs[]){chara=‘h’;inti=100;intj=97;intaa=a+i;
在两样本均数推断两总体均数差别的t检验中,无效假设是
生甘草宜用于
患者,胃、十二指肠溃疡出血,经对症治疗出血停止,病情缓解,大便隐血阳性。患者呕血时,应给予安置()。
案情:国有企业川南商业大楼于2008年年初拟定改制计划:将资产评估作价150万元出售,其中105万元出售给管理层人员(共4人),45万元出售给其余45名职工,将企业改制为川南百货有限公司,注册资本150万元,该改制计划于同年2月经有关部门批准实施。原管理层
根据以下资料,回答下列问题:2004年8月27日,N省某市教育局下发了一份《关于对在校学生饮用水试行定点供应工作的通知》,要求市直各中、小学全部饮用本市A水业公司和B纯净水公司生产的纯净水,其他饮水企业和经销商禁止进入学校。同年9月14日,C、D
设向量组α1,α2,α3线性无关,证明:α1+α2+α3,α1+2α2+3α3,α1+4α2+9α3线性无关.
On a(75)memory system,the logical memory space available to the program is totally independent of the physical memory space.
EachofQuestions1to7presentstwoquantities.QuantityAandQuantityB.Comparethetwoquantities.Youmayuseadditional
ASocioculturalApproachtoReading,LanguageandLiteracyI.ThemeaningoftakingasocioculturalapproachA.Itrejectsthe【
最新回复
(
0
)