首页
登录
职称英语
Another thing an astronaut has to learn about is eatingin space. Food is wei
Another thing an astronaut has to learn about is eatingin space. Food is wei
游客
2024-01-17
42
管理
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. [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/3371119.html
相关试题推荐
ProfessorSmithissaid______anotherimportantdiscoveryinchemistry.A、tomake
Onenteringanothercountry,atouristwillhaveto______theCustoms.A、passth
Theway(which)thedifferentkindsofrock(lie)ononeanother(helps)totell
______productionupby60%,thecompanyhashadanotherexcellentyear.A、AsB、Fo
Beyond______stars,thetwoastronautscouldseenothingbut______space.A、the;a
Takethisboxand______youcanfindenoughspace.A、putitwhichB、putupitwhic
A:Whatasurprise!Youchangedyourhairstyle.B:Yes,andanothersurprise.I’m
Tom:Iseeinthepaperthey’resendingmoreequipmenttospace.Andwemightha
Anotherargumentwithhisboss______himthatheshouldfindanewjob.A、convince
Anotherproblemthatneeds______isrelatedtoteaching.A、discussedB、todiscuss
随机试题
Completethegap-fillingtask.SomeofthegapsbelowmayrequireamaximumofT
TheUnitedStatesranksfirstamongWesterncountriesasfarasdivorcerateis
下列激素中,不能促进蛋白质合成的是()。A.甲状腺激素 B.甲状旁腺激素
根据以下材料,回答73-76题 李先生是做体育器械生意的,自己的公司近两年的营
钙测定的参考方法是()A.火焰光度法 B.原子吸收分光光度法 C.邻甲酚肽络
肾上腺素A.α受体激动剂B.α受体拮抗剂C.β受体激动剂D.β受体拮抗剂E.α、
下列哪条性质与麻醉乙醚不符()A.在光照和空气中颜色逐渐变黄 B.无色
A.釉质周期性生长速率改变所形成的间歇线 B.是全身代谢障碍的表现 C.可以
A.接触传播 B.诊疗手术传播 C.水和食物传播 D.各种制剂传播 E.
在成批轮番生产企业的期量标准中,()是指产品或零件在各工艺阶段投入或产出时间与
最新回复
(
0
)