首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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 chang
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 chang
admin
2022-11-07
81
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. 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. 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. 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://kaotiyun.com/show/yRjJ777K
0
大学英语四级
相关试题推荐
2017年6月实际完成的某工程按2016年6月签约时的价格计算,工程价款为1000万元,该工程固定要素的系数为0.2,各参加调值的部分,除钢材和水泥的价格指数分别增长了10%和15%外,其余都未发生变化,钢材和水泥的费用分别占调值部分的40%和20%,按价
PASSAGEONE(1)Aftertakingabriefhiatustoweathertherecession,aninvasionofBritainbysomeofAmerica’sbest-known
DaydreamingI.DaydreamingcanbeharmfulbecauseitwasconsideredasA.awasteof【T1】______B.a【T2】______ofneur
Properarrangementofclassroomspaceisimportanttoencouraginginteraction.Today’scorporationshirehumanengineeringspec
Arapidmeansoflong-distancetransportationbecameanecessityfortheUnitedStatesassettlementspreadfartherwestward.F
Arapidmeansoflong-distancetransportationbecameanecessityfortheUnitedStatesassettlementspreadfartherwestward.F
A、VisitachessteaminNashville.B、Jointheschool’schessteam.C、Participateinanationalchesscompetition.D、Receivetrai
A、Stageademonstrationagainste-cigarettes.B、Refusetoadvertisee-cigarettesinpublic.C、Callforlawstoprotecttheteena
A、Makeashoppinglistbeforegoingtothestore.B、Don’tbuyfoodthatlooksdelicious.C、Buythefoodinlargersize.D、Buyfa
随机试题
简述视图的作用。
气瘿肝郁脾虚型可用何方瘿痈气滞痰凝型可用何方
申请设立期货公司,应当向工商行政管理机关提交公司章程草案。()
根据汇率适用的外汇交易背景,可以将汇率分为()。
根据物权法,下列物权中,其设立、变更未经登记即可发生效力的有()。
已知数据23、25、26、22、21、27、28、24、30、33,用这l0个数分别减去其平均数,所得10个数值的和为()
根据下面材料回答下列问题。2006年前三季度直辖市农民现金人均收入中,最高收入是最低收入的倍数为()。
从战略构成要素的角度来看,()通常是经营单位战略中最重要的组成部分。
阅读下列说明,回答问题1至问题4,将解答填入答题纸的对应栏内。【说明】某大学准备制作关于某课程的网络公开课视频以满足广大非在校生的学习需求。该公开课视频计划将PPT讲解、板书讲解、实景(实验室/工厂/博物馆)讲解和动画演示等多种教学方式融合到一
Nowadaysmoreandmorepeoplegoinforexercise.Whyisitso?Whatarethegoodeffectsofexercise?Writeanessayillustrati
最新回复
(
0
)