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
58
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、Walking on the Moon is more difficult.
B、Mars has less gravity than Moon does.
C、People can’t keep balance on Mars.
D、People need more oxygen on Mars.
答案
A
解析
短文中指出,通过实验,Newman得出如下结论:在火星上行走可能比在月球上行走容易一些。
转载请注明原文地址:https://tihaiku.com/zcyy/3380683.html
相关试题推荐
[originaltext](1)TheInternationalLaborOrganizationsaysthenumberofp
[originaltext](5)ThreeuniversitystudentsinSantiago,Chile,havedevelo
[originaltext]TheTunisiangovernmentsaidMondaythat45peoplehavebeen
[originaltext]NewYorkStateplanstoshutoffthethunderingwatersofNia
[originaltext]NewYorkStateplanstoshutoffthethunderingwatersofNia
[originaltext](5)ThreeuniversitystudentsinSantiago,Chile,havedevelo
[originaltext](5)ThreeuniversitystudentsinSantiago,Chile,havedevelo
[originaltext]NewYorkStateplanstoshutoffthethunderingwatersofNia
[originaltext](5)TheUSPostalServiceannouncedtodaythatitisconsider
[originaltext](5)TheUSPostalServiceannouncedtodaythatitisconsider
随机试题
Toseehowbigcarrierscouldcontroltheonlineworld,youmustunderstand
Thereare10blanksinthepassage.Usethewords(phrases)giveninthebox
砌块上下皮错缝搭接长度一般为砌块长度的1/2(较短的砌块必须满足这个要求),或不
以下关于职业道德的说法正确的是A.每一种职业都有其特殊的社会职责和特殊的利益和
“气随血脱”的理论基础是( )。A.气能生血 B.气能行血 C.气能摄血
下列关于城市规划常用指标的表述中,不正确的是()。A.容积率为一定地块内建筑
在本次包销部分的股票上市之日起20日内,主承销商有权根据市场情况,从集中竞价交易
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
患者,男,35岁。诊断为支原体肺炎,宜选用的抗菌药物有A.阿奇霉素 B.阿莫西
房地产市场细分的依据是()的差异。A:消费者欲望和需求 B:产品品种 C:国
最新回复
(
0
)