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
48
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.
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://kaotiyun.com/show/NMJO777K
0
成人本科学位英语
相关试题推荐
Therearetwomainthingsthatmakeaircraftengineeringdifficult:theneedtomakeeverycomponentasreliableaspossibleand
Everycountrytendstoacceptitsownwayoflifeasbeingthenormaloneandtopraiseorcriticizeothersastheyaresimilar
Howeverweakyourmemorymaybe,youcanmakeupforitby______whatyouwanttoremember,andrepeatingitoverandoveragain.
Woman:Haveyouheardabouttheplanecrashyesterday?Itcaused120deaths.I’mneverateasewhentakingaflight.Man:Though
ThekeytotheindustrializationofspaceistheU.S.spaceshuttle.【C1】______it,astronautswillacquireaworkhousevehicle【C
Thestreams,oftenpettyandinsignificantduringdryweather,becomeraging______duringastorm.
ForgetHarryPotter.Nomatterthatthefilmaboutthisschoolboywithmagicpowersbrokeallbox-officerecordsonitsopening
当他听到这个消息时忍不住哭了。
Heleft______withmysecretarythathewouldcallagainintheafternoon.Hesaidhewouldkeep______.
Themini-skirtis______
随机试题
下面关于菜单的叙述中正确的是()。
患者,女,20岁。晨起在操场跑步中突然摔倒,意识不清,呼吸慢呈叹息样,桡动脉脉搏触不到,5分钟内送入校医院抢救。检查:意识完全丧失,颜面青紫,大小便失禁,呼吸停止,心音消失,股动脉脉搏消失,血压测不出。对患者的即刻处理,正确的是
甲欠乙100万元,甲以自己价值50万元的房屋抵押担保。丙以价值50万元的汽车抵押担保。丁为甲提供保证,未约定保证方式,但约定丁承担保证责任直至债务人甲还清本息时为止。请回答以下问题:假设甲并未将债务转让给戊,现甲未对债权人乙履行100万元的到期债务,由
一平面简谐波的波动方程为y=2×10-2cos2π(10t-)(SI),对x=-2.5m处的质元,在t=0.25s时,它的()。
某村换届选举中,四名候选人(张老汉、田老汉、小李、小王)的得票情况为:张老汉的票数比田老汉多,田老汉的票数比小李多,小王得票没有张老汉多。得票最多的是()。
在教学活动中,贯彻启发性原则,教师应遵循的基本要求是()。
教师在教育工作中要做到循序渐进,这是因为()
____に新製品を使ってもらって次の製品の参考にします。
シャツのうりばは、このうえの3がいです。あの________でいってください。
AthevolunteersdoBbecauseshedoesnothaveaweightproblemCbecausethelifetherecanbeveryboringDmakepeopleovere
最新回复
(
0
)