首页
登录
职称英语
Another thing an astronaut has to learn about is eating in space. Food is we
Another thing an astronaut has to learn about is eating in space. Food is we
游客
2024-01-17
21
管理
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. [br] 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://tihaiku.com/zcyy/3370070.html
相关试题推荐
Linda,______haslivednextdoortomeabout10years,willmovetoanothercity
Anotherproblemthatneeds______isrelatedtoteaching.A、discussedB、todiscuss
Thetwopartieshaven’treachedanyagreement,butdecidedtosetanotherdate
Wedonotoftenconsiderhowmuchenergygoesintocreatingcomfortslikeho
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
Onecarwenttoofastand______missedhittinganothercar.A、completelyB、greatly
Inspace,______andequipmentneedmanyformsofprotection.A、pilotsB、astronauts
Sometimeintheearly1990’sIwastreatingawomaninanintensivechemical
Sometimeintheearly1990’sIwastreatingawomaninanintensivechemical
随机试题
TreesTomany,thewordtreesevo
Musicians—fromkaraokesingerstoprofessionalviolinplayers—arebetterabl
()等特种作业人员,必须按照国家有关规定经过专门的安全作业培训,并取得特种作业
下列关于反向购买的表述中,不正确的有( )。A.反向购买是同一控制下企业合并
人类白化病是常染色体隐性遗传病。某患者家系的系谱图如下,显性基因为A,隐性基因为
总需求曲线向下方倾斜的原因是()。A.随着价格水平的下降,居民的实际财富
关于圆癣的描述,以下哪项不正确A:好发于长夏高温、潮湿季节 B:好发于面部、躯
租赁合同中,租赁期间届满,当事人可以续订租赁合同,但约定的租赁期限自续订之日起不
许又新提出的心理健康标准包括()。多选A.体验标准 B.操作标准 C.
男,50岁。幽门梗阻持续胃肠减压半个月,每日10%葡萄糖2500mL,5%葡萄糖
最新回复
(
0
)