首页
登录
职称英语
[originaltext] It’s great to see so many of you interested in this series on
[originaltext] It’s great to see so many of you interested in this series on
游客
2023-12-22
66
管理
问题
It’s great to see so many of you interested in this series on survival in outer space. Tonight I’m going to talk about the most basic aspect of survival—the space suit. When most of you imagine an astronaut, that’s probably the first thing that comes to mind, right? Well, without space suit, it would not be possible for us to survive in space. For example, outer space is a vacuum. There’s not gravity or air pressure. Without protection, a body would explode. What’s more, we’d cook in the sun or freeze in the shade with temperature’s ranging from a toasty 300 degrees above to a cool 300 degrees below zero Fahrenheit. The space suit that NASA has developed is truly a marvel. This photo enlargement here is a left side’s image of an actual space suit worn by astronauts on the last space shuttle mission. This part is the torso. It’s made of seven extremely durable layers. This thick insulation protects against temperature extremes and radiation. Next is what they call a bladder of oxygen. That’s an inflatable sack filled with oxygen to simulate atmospheric pressure. This bladder presses against the body with the same force as the earth atmospheric sea level. The innermost layers provide liquid cooling and ventilation. Despite all the layers, the suit is flexible allowing free movement, so we can walk. Another really sophisticated part of the space suit is the helmet. I brought one along to show you. Can I have a volunteer come and demonstrate?
15. What will cause an unprotected human body to explode in outer space?
16. Where is the bladder of oxygen located?
17. What does the speaker show the audience as he describes the main part of the space suit?
18. What will probably happen next?
选项
A、Another speaker will describe the helmet.
B、The speaker will talk about the space.
C、Someone from the audience will try on the helmet.
D、The speaker will put on a space suit.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3295890.html
相关试题推荐
WhichofthefollowingisNOTtrueofVerbalizelt?[br][originaltext]Verbal
WhichofthefollowingisNOTtrueofVerbalizelt?[br][originaltext]Verbal
CaliforniaGovernorvisitedChinato______.[br][originaltext]CaliforniaGo
CaliforniaGovernorvisitedChinato______.[br][originaltext]CaliforniaGo
CaliforniaGovernorvisitedChinato______.[br][originaltext]CaliforniaGo
Whatissuggestedtodobeforemakingadecisiontochange?[br][originaltext]
Whatissuggestedtodobeforemakingadecisiontochange?[br][originaltext]
Whatisthetoweringmachinefor?[br][originaltext]Thetoweringmachiness
Whatisthetoweringmachinefor?[br][originaltext]Thetoweringmachiness
Whatisthetoweringmachinefor?[br][originaltext]Thetoweringmachiness
随机试题
Theword"sport"firstmeantsomethingthatpeopledidintheirfreetime.L
Thehousehasbelonged______herfamilyforthreeorfourgenerations.A、toB、wi
关于增值税的纳税义务发生时间和纳税地点的说法,正确的有()。A.纳税人发生视同
图示结构弯矩示意图正确的是( )。
隧道混凝土衬砌,卵石、碎石针片状颗粒含量,按质量计应小于()。A.0.03
【教案】 TeachingAims: Knowledgeaim:Studentswillknowwhatsensegroupisan
小儿单纯性肥胖最多见的原因是A.遗传因素 B.摄入过多 C.活动减少 D.
为避免抵押合同无效造成贷款风险,银行抵押贷款首先要做好(),才能真正保证贷款抵押
收集了民间单方验方的是A.《和剂局方》 B.《外台秘要》 C.《千金要方》
α-磷酸甘油穿梭的生理意义是A.将乙酰CoA带入线粒体中彻底氧化 B.维持线粒
最新回复
(
0
)