首页
登录
职称英语
[originaltext] Listen to a talk given by an astronaut. Thank you. It’s g
[originaltext] Listen to a talk given by an astronaut. Thank you. It’s g
游客
2024-08-08
12
管理
问题
Listen to a talk given by an astronaut.
Thank you. It’s great to see so many of you interested in this series on "Survival in Outer Space". Please excuse the cameras--we’re being videotaped for the local TV stations.
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 suits, it would not be possible for us to survive in space. For example, outer space is a vacuum--there’s no 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 temperatures 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 life-size 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 sac, filled with oxygen, to simulate atmospheric pressure. This bladder presses against the body with the same force as the Earth’s atmosphere at sea level. The innermost layers provide liquid cooling and ventilation. Despite all the layers, the suit is flexible, allowing free movement so we Call work.
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?
21. What is the speaker’s main purpose?
22.What would cause an unprotected human body to explode in outer space?
23.Where is the "bladder" of oxygen located?
24.What does the speaker show the audience as she describes the main part of the space suit?
25.What will probably happen next?
选项
A、Another speaker will describe the helmet.
B、The woman will talk about the space shuttle.
C、Someone from the audience will try on the helmet.
D、The woman will put on a space suit.
答案
C
解析
说话者带来了一个头盔的实物,并问观众谁自愿上来示范一下。可以推测接下来应有一位自愿者上来试戴头盔,因此选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3710876.html
相关试题推荐
SummaryListentothepassage.Forquestions26—30,completethenotesusingno
SummaryListentothepassage.Forquestions26—30,completethenotesusingno
SummaryListentothepassage.Forquestions26—30,completethenotesusingno
SummaryListentothepassage.Forquestions26—30,completethenotesusingno
Whatisthefindingreportedinthenews?[br][originaltext]16.Researchersha
Whatisthefindingreportedinthenews?[originaltext]16.Researchershavefou
HowdidGregstartfire-walking?[br][originaltext]Listentotheconversation,
HowdidGregstartfire-walking?[originaltext]Listentotheconversation,mark
[originaltext]W:Sohowdidthemeetinggo?Didyoumanagetoconvinceyourcus
[originaltext]W:Sohowdidthemeetinggo?Didyoumanagetoconvinceyourcus
随机试题
关于门脉高压症手术麻醉正确的是下列哪几项A.麻醉前放腹水1次放水量不可超过100
用3m直尺检测路面平整度时,将有高度标线的塞尺塞进间隙处,量记最大间隙的高度,精
商业银行()绩效薪酬根据年底经营考核结果,在其基本薪酬的3倍以内确定。A.
预防糖尿病患者足部损伤和感染的护理措施,不妥的是()。A.每日进行足部皮肤的清
利尿剂降低血压的主要作用机制是A:减少血容量 B:阻断β受体 C:阻断α受体
面试准备阶段的工作主要包括( )。A.制定面试指南 B.建立面试关系 C.
在我国,引起慢性肾衰竭最常见的病因是A.肾小动脉硬化 B.肾结核 C.慢性肾
L型钙通道中的主要功能亚单位是A.α B.α C.β D.γ E.δ
(2016年真题)根据社会保险法律制度的规定,用人单位应当自用工之日起()内为其
球形罐整体热处理过程中应监测柱脚实际位移值及支柱垂直度,及时调整支柱使其处于垂直
最新回复
(
0
)