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 eatingin space. Food is weightless, just as men are. Food for space has to
Another thing an astronaut has to learn about is eatingin space. Food is weightless, just as men are. Food for space has to
admin
2018-09-25
27
问题
Another thing an astronaut has to learn about is eatingin 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. 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.
Why would astronauts cover each bite of food in space?
选项
A、Because small pieces of food would fall down to the floor
B、Because weightless pieces of food might make trouble when they travel around
C、Because they haven’t enough food for longer trips
D、Because astronauts don’t want to waste food
答案
B
解析
事实细节题。文章第二段主要是解释食物要用塑料包起来的原因。在太空中由于不存在重力,食物就会到处移动,可能飞到人眼睛里或宇宙飞船的仪器中,引起麻烦。
转载请注明原文地址:https://kaotiyun.com/show/xR3O777K
0
成人本科学位英语
相关试题推荐
Asapoliceman,Mr.Brownthoughtthathehadadutyto______thelostchildreninfindingtheirhomes.
______bythebeautyofnature,thegirlfromLondondecidedtospendanothertwodaysonthefarm.
______inthought,hedidn’ttakenoticeofmewhenIwaspassingby.
Ithoughtitwasgoingtorainbutithas______fine.
AwarmthoughtsuddenlyAcametomeBwhichImightCusethepocketmoneytobuysomeflowersDformymother’sbirthday.
Noonecanavoid______byadvertisementswhichcanbeseeneverywhere.
YournervesystemreactsAtoBwhatyouimaginetobetrueConmuchthesamewaythatitDdoestorealexperiences.
SpeakerA:Thisappletastesnice.CouldIhaveanotherone?SpeakerB:______
Muchunfriendlyfeelingtowardscomputershasbeenbasedonthefearofwidespreadunemploymentresultingfromtheirintroductio
ThethemeoftheInternationalLiteracyDaythisyearistheconnectionbetweenliteracyandsustainabledevelopment.Literacyh
随机试题
A.本经配穴法B.同名经配穴法C.前后配穴法D.表里经配穴法偏头痛取风池、侠溪,其配穴方法是
某公司2014年支付股利共510万元,过去的10年期间该公司的盈利按固定10%速度持续增长,2014年税后盈利为1740万元。2015年预计盈利2762万元,投资总额为2000万元,预计2015年以后仍会恢复10%的增长率,公司如果采用不同的股利政策
TherewereredfacesatoneofBritain’sbiggestbanksrecently.Theyhadacceptedatelephoneordertobuy$100,000worthof
女性,59岁。因发作性面部剧烈疼痛而来门诊求治。疼痛从右侧口角开始,扩散至右面颊部,呈刀割样或撕裂样,爆发性发作,每次发作数秒钟,并常为说话、刷牙或咀嚼所触发。最可能的诊断是
()对于国家相当于免疫对于()
在一个估价项目中,估价目的、估价对象、估价时点三者都是有着内在联系的,其中估价时点是龙头。()
施工人员对涉及结构安全的试块、试件以及有关资料,应在建设单位或者( )监督下现场取样。
一般使变压器用电负荷达到额定容量的()左右为佳。
关于支付时间、支付方式、支付条件和支付审批程序等有很多种可能的选择,并且可能对承包人的成本、进度等产生比较大的影响,建设工程施工合同的付款分四个阶段进行,即()。
只看到物体的固有功能,比如盒子就是装东西,笔就写字,而不能将这种物体灵活的运用到其它问题解决中,这体现的影响问题解决的因素是()。
最新回复
(
0
)