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
2025-03-06
29
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 does an astronaut put his hand under his belt when he sleeps?
选项
A、Because he thinks it is comfortable to sleep in that way in space.
B、Because he doesn’t want to touch any controls when he sleeps.
C、Because the instruments of the spaceship are easily broken.
D、Because he is afraid that the seat will move.
答案
B
解析
事实细节题。文章最后两句提到,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。
转载请注明原文地址:https://tihaiku.com/zcyy/3984635.html
相关试题推荐
Itisindeedthecasethatcheatingonexamhasbeenseriousatschool.Many
Itisindeedthecasethatcheatingonexamhasbeenseriousatschool.Many
Itisindeedthecasethatcheatingonexamhasbeenseriousatschool.Many
Itisindeedthecasethatcheatingonexamhasbeenseriousatschool.Many
Itisindeedthecasethatcheatingonexamhasbeenseriousatschool.Many
Oneofthebestwaysforpeopletokeepfitisto______healthyeatinghabits.A、g
Whatyou’realwaysheard?We’reeatingwaytoomuchsalt.TheaverageAmer
Whatyou’realwaysheard?We’reeatingwaytoomuchsalt.TheaverageAmer
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
Anotherthinganastronauthastolearnaboutiseatinginspace.Foodiswe
随机试题
AccordingtoDeirdreImus,whyisitimportanttoraisegreenkids?[originaltex
A.匀速转动 B.固定不动 C.加速转动 D.先加速转动,然后匀速转动
“水火既济”指的脏腑是A.肝肺B.脾肾C.心肾D.肝肾E.心脾
患者,45岁。近半年来上腹间断性胀痛,反酸,近2个月出现反复呕吐,呕吐物为酸酵性
内因子缺乏可引起A.缺铁性贫血B.巨幼红细胞性贫血C.恶性贫血D.溶血性贫血E.
根据经济普査资料初步测算,我国2004年GDP现价总量中,第一产业增加值为209
(2017年真题)痛风缓解期宜选用的治疗药物是( )A.苯溴马隆 B.阿司匹
房地产实地调研方法包括()。A:投射法 B:询问法 C:观察法 D:试验法
下列四个杆件均受图示轴向力作用,其中轴力图不正确的是()。A. B. C
最新回复
(
0
)