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
2011-02-27
55
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.
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/AMJO777K
0
成人本科学位英语
相关试题推荐
Weallhaveupsanddowns,andusuallyit’sjustbesttoacceptthem.Butperhapsyouareconcernedaboutsomeonewhoseemstob
Youngpeopleoftenwonderatthelargenumberofemployerswhodonotrespondtotheirapplicationforjobs.Theysaythatdespi
Learningdisabilitiesareverycommon.Theyaffectperhaps10percentofallchildren.Fourtimesasmanyboysasgirlshavelea
NowmoreandmoreChinese,especiallytheyoung,havebeguntobuycarsorhousesonbankloan.Writeapassageofatleast120
Theeffectofdoublingthewidthofabeam,______istodoubletheloadthatcanbesustained.
Thereisverylittleraininthisregionofthecountry;______,weoftenhavecropfailures.
ShouldWeBantheDogsfromtheCities?(1)有的人认为城市中应该禁止养狗。(2)有的人认为不应该对此加以限制。(3)我的看法。
IntheUnitedStates,itisnotcustomarytotelephonesomeoneveryearlyinthemorning.Ifyoutelephonehimearlyintheday,
他起得很早为的是赶上第一班公共汽车。
Ajudgemustbe______whenweighingevidence.
随机试题
下列权利中不属于民事权利的是()。
测定酶活性的必要条件是
专用架桥机可按()的不同进行分类
我国《合同法》规定,当事人在合同中既约定了违约金,又约定了定金的,一方违约时,另一方()。
()的出版标志着规范教育学的建立。
下面发生了学习的情形是
甲、乙、丙为兄弟关系,另无兄弟姐妹,均未结婚,父母死亡时,未留有遗嘱,故该房屋为三人共同继承,虽房屋登记在乙名义下,但实际上为三人共有。2006年4月,甲外出经商,房屋由乙照看,乙因赌博欠债,无力还款,竟以自己名义将该房屋出卖给丁,双方签订了买卖合同,约定
详细设计属于软件的哪个阶段?()
____________(还要更长时间)beforeyougraduatefromcollege?
Impressionismisaformofartthatbeganinthe1870’s.Whenyoulookcloselyatanimpressionistpainting,youseelittledots
最新回复
(
0
)