首页
登录
职称英语
[originaltext] Located at the NASA Research Center in Iowa is a 5 000-gallon v
[originaltext] Located at the NASA Research Center in Iowa is a 5 000-gallon v
游客
2024-01-21
60
管理
问题
Located at the NASA Research Center in Iowa is a 5 000-gallon vat of water. Inside the tank is an underwater running machine designed by Dava Newman, an aerospace engineer. (20) For four years Newman observed scuba divers as they simulated walking on the Moon and on Mars on her underwater moving belt. She wanted to discover how the gravity of the Moon and of Mars would affect human movement. To do this, Newman attached weights to the divers and then lowered them into the tank and onto the running machine. These weights were carefully adjusted so that the divers could experience underwater the gravity of the Moon and of Mars as they walked on the running machine. (21) Newman concluded that walking on Mars will probably be easier than walking on the Moon. The Moon has less gravity than Mars does, so at lunar gravity, the divers struggled to keep their balance and walked awkwardly. But at Martian gravity, the divers had greater traction and stability and could easily adjust to a pace of 1.5 miles per hour. As Newman gradually increased the speed of the running machine, the divers took longer, graceful strides until they comfortably settled into an even quicker pace. Newman also noted that at Martian gravity, the divers needed less oxygen. The data Newman collected will help in the future design of spacesuits for Mars. (22) Compared to lunar spacesuits, spacesuits for Mars will require smaller air tanks; and, to allow for freer movement, the elbow and knee areas of the spacesuits will also be altered.
20. What did Dava Newman do to find the effects of gravity on human movement?
21. What conclusion did Newman get?
22. What does the speaker say about the spacesuit for Mars?
选项
A、It will need larger air tanks.
B、It will be more flexible.
C、It is the same as the lunar one.
D、Its elbow areas won’t be changed.
答案
B
解析
短文在结尾处指出,与月球的太空服相比,火星的太空服需要较小的空气罐。为了能够更灵活地移动,太空服的肘和膝盖部分也会有所改变。由此可知,火星的太空服会更加灵活一些。
转载请注明原文地址:https://tihaiku.com/zcyy/3380684.html
相关试题推荐
中国国家深海基地(theChinaNationalDeepSeaCenter)将于明年对中国和世界开放以进行深海探索。基地将占地26公顷(he
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolato
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpic
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpic
[originaltext]Passionfruitistheediblefruitofthepassionflower.(16)Sp
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]W:Heytaxi!M:Whereto?W:Well,I’mgoingtotheNationalMuse
[originaltext]W:Heytaxi!M:Whereto?W:Well,I’mgoingtotheNationalMuse
[originaltext]W:Heytaxi!M:Whereto?W:Well,I’mgoingtotheNationalMuse
[originaltext]Asinglecigarettesoldonastreetcornermaynotcostalot:
随机试题
Antsfirstcapturedtheattentionofsoftwareengineersintheearly1990s.
WhichofthefollowingisNOTabranchofmacrolinguistics?A、Anthropologicallin
Butforalltheefforts,hedidnotsucceed.A、但是他所有的努力都失败了。B、但是尽管他再三努力,他还是没有获得成
Thereistimewhenjobseekerssimplywortelettersofapplication."Justp
色阶(Level)对话框中输入色阶的水平轴表示的是下列哪个数据?
下列说法中,不属于室内消火栓的维护管理内容的是()。A.检查消火栓和消防卷
增液汤的药物组成是.A.人参、麦冬、熟地黄 B.人参、天冬、生地黄 C.玄参
目前,各级政府部门明令施工企业用工必须加强管理的重点对象是( )。 A、自有
下列关于信托的种类划分的说法中,错误的是()。A.按信托关系建立的方式可划
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)