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 to
Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are. Food for space has to
admin
2016-09-28
31
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 travelling 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/UZRO777K
0
成人本科学位英语
相关试题推荐
Ihearmanyparentscomplainthattheirteenagechildrenarerebelling.Iwishitwereso.Atyourageyououghttobegrowinga
Howcloseparentsaretotheirchildren______astronginfluenceonthedevelopmentofthechildren’scharacter.
Hisparents______hismoney,soheisintroublenow.
Myparentsboughtmesomebooks,but______wasinteresting.
Usuallyachild’sbehaviorisa______ofhisfamilyenvironment.
Now,takingbooks,oranythingelse,fromalittlegirlisliketakingcandyfromababy,butthefatherofthelittlegirlhad
Cindy:______Rose:No,whathappened?Cindy:Theylethimgoasheissuspectedtobecheating.
—Don’tbedisappointed.Haveanothergo,OK?—______.
Isupposethatthemostbasicandpowerfulwaytoconnecttoanotherpersonistolisten.Justlisten.Perhapsthemostimportan
随机试题
爆炸按性质分类,可分为()。
男,8岁。2个月前因左侧脓胸行胸腔闭式引流术,现患儿食欲缺乏,低热,肋间隙变窄,胸片肺内未见明显异常。治疗应选择
医技人员应合理采集、使用、保护、处置标本,不违规()标本,谋取不正当利益
主神志的脏是主升清的脏是
光羊有限责任公司是按照我国《公司法》设立的公司,应当如何认定公司住所?()
《注册测绘师制度暂行规定》第四条规定:本规定所称注册测绘师,是指经考试取得《中华人民共和国注册测绘师资格证书》,并依法注册后,从事测绘活动的()人员。
下列属于单位工程投入使用验收工作内容的是()。
按房屋所有权性质,房屋租赁分为()。
()是人民调解工作应当遵守的原则。
行政体系与外界环境之间,行政体系与内部各部门之间、层次之间、人员之间凭借一定的媒介和通道传递交流思想、观点、情感、情报等信息,以期达到相互了解、支持与合作,谋求行政体系和谐有序运转的管理行为或过程称之为()。
最新回复
(
0
)