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
2025-03-04
8
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 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] In a spaceship, astronauts can________
选项
A、walk just as they do on the earth
B、not eat anything because it’s dangerous
C、control the spaceship when they are sleeping
D、not litter small things or it will make trouble
答案
D
解析
推理判断题。可以用排除法。在宇宙中,由于失重,宇航员不可能像在地球上一样行走,所以A不对。因为食物也像宇航员一样失重,吃东西就会变得非常困难,而不存在危险,所以B也不对。为了防止在睡眠中不小心触摸控制键,宇航员要将双手放在安全带下,因此他睡着的时候是不能控制宇宙飞船的,这样C也排除了。为了防止小东西由于失重飞到人眼睛里或机械中,宇航员是不能到处乱扔东西的,所以只有D是正确的。
转载请注明原文地址:https://tihaiku.com/zcyy/3982044.html
相关试题推荐
Spacevehicleswerelaunchedintoouterspace______searchofanotherlivingplan
Stressfulenvironmentsleadtounhealthysuchaspooreatinghabits,which_____
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
W:Theexperimenthasbeencompleted,hasn’tit?M:______A、Yes.Weneedanother
SpeakerA:Wouldyoulikeanotherpieceofapplepie(苹果派)?SpeakerB:______A、D
Tom:Iseeinthepaperthey’resendingmoreequipmenttospace.Andwemightha
Healthproblemsarecloselyconnectedwithbadeatinghabitsanda________ofexe
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
随机试题
You’dratherworkthanplay,______?A、doyouB、wouldyouC、don’tyouD、wouldn’t
AtatimewhenatoweringpersonalitylikeMme.Curiehascometotheendof
AMessontheLadderofSuccessA)ThroughoutAmericanhistor
某患者,二尖瓣面容,呼吸困难;心电图示"二尖瓣型P波";X线检查心影呈梨形;超声
(2011年真题)下列会计核算的基本前提,作为会计核算记账基础产生的前提是( )
有关热原检查法的叙述中,错误的是A鲎试剂法对革兰阴性菌以外内毒素不灵敏 B鲎试
轴向受拉压杆横截面积为A,受荷载如图所示,则m-m截面上的正应力为:
当甲、乙、丙类液体槽车装卸栈台设置泡沫炮或泡沫枪系统时,下列说法错误的是()。
道路运输行政诉讼的特殊性表现在()。A.道路运政管理的相对人较为集中,多为道路运
斜坡堤堤心石抛填,当采用陆上推进法时,堤根的浅水区可一次抛填到顶,堤身和堤头视(
最新回复
(
0
)