首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
共用题干 第一篇An Expensive MistakeIs there water on the planet Mars? Is there life...
共用题干 第一篇An Expensive MistakeIs there water on the planet Mars? Is there life...
admin
2020-12-24
43
问题
共用题干
第一篇
An Expensive Mistake
Is there water on the planet Mars? Is there life on Mars?Was there ever life on Mars?Scientists from
NASA wanted to know the answers to tliese questions.They built a spacecraft to travel around Mars and get
informnation.The spacecraft was called the Mars Climate orbiter.
The Mars Climate Orbiter left for Mars iii December 1998.The trip took nine and a half months.At first,
everything was fine.However.when the Orbiter got near Mars,something terrible happened.The spacecraft
didn't go to the right place.It went too close to Mars.it was too hot for the Orbiter there.The spacecraft
couldn't function correctly.Suddenly,it stopped sending messages to NASA.The Orbiter was lost.
How could this terrible thing happen? How did the Orbiter get closer to Mars than the scientists
planned? Finally,they found the anlswer. Two teams of scientists worked together on the Orbiter. One team
was in England,and one teann was in the United States.There were many similarities in the way they
worked,but there was one important difference:The teams used different guidelines for measuring things.The
United States team used the metric systcnni(公制).The oilier team used the English system.
Because they used different systems,the scientists made a mathematical mistake.The Orbiter's orbit
(the shape and pattern of its path)around Mars was not correct.The scientists put the Orbiter on the wrong
path.The Orbiter got too close amid too hot,and it stopped functioning.
Why didn'tanybody see the mistake before it was too late?Many things contributed to the problem.
One thing was that NASA scientists and mathematicians were working on two other spacecrafts at the same
time.This was a challenge,and they were very tired from working long hours.
The Mars Climate Orbiter cost $94 million to build.It also cost a lot of money to try to find the lost Or-
biter in space.In addition,NASA's research on the cause of the problem was very expensive.This wasn't
the first time that two different measurement systems caused mistakes in scientific projects.However,the
Mars Climate Orbiter was definitely the most expensive mistake of all!
选项
Why didn't NASA scientists identify the problem before the Orbiter left for Mars?
A:They didn'tknow the English system.
B:They were sure of the success of the trip.
C:They were tired from working long hours.
D:They didn'tget enough research funding.
答案
C
解析
文章第一段以三个问句开头:“火星上有水吗?"“火星上有生命吗?"“火星上有过生命吗?”接着指出NASA的科学家们想知道这些问题的答案,他们建造了航天飞船环绕火星飞行来获得信息。故选B。
由文章第二段第二句话可知,飞船从地球到火星的旅程花费了九个半月的时间,故选B。
由文章第二段第三、四句话“Atfirst,everythingwasfine.However,whentheOrbitergotnearMars,somethingterriblehappened.”可知飞船是在接近火星时出现问题的。
由文章第三段和第四段可知,来自英国和美国的两组科学家共同负责飞船的工作,他们在做计算工作时采用了不同的计算准则。这造成计算数据出错,导致飞船绕火星飞行的轨道出现偏差。故选D。
由文章倒数第二段可知,科学家们没能发现错误的其中一个原因是NASA的科学家和数学家们同时还要负责另外两个航天器的工作,长时间的工作使他们非常疲惫。故选C。
转载请注明原文地址:https://ti.zuoweng.com/ti/JEpQKKKQ
相关试题推荐
共用题干 2008年,借着中国举办奥运会的契机,很多对情侣选择在这一年走进婚姻的殿堂,孙先生和赵女士就是其中的一对。新婚不久,孙先生在朋友的建议下,决定...
共用题干 经济危机来临,很多4S店搞起了打折促销活动。王先生趁着打折时机,购买了自己心仪已久的一辆轿车,价值25万元。“爱车如妻”这句话在王先生身上体现...
共用题干 马先生2008年1月采用组合贷款法购买了住房一套,购买当月开始还款。其中40万元的公积金贷款采用等额本金贷款方式,贷款利率为5.22%,其余3...
共用题干 马先生2008年1月采用组合贷款法购买了住房一套,购买当月开始还款。其中40万元的公积金贷款采用等额本金贷款方式,贷款利率为5.22%,其余3...
共用题干 马先生2008年1月采用组合贷款法购买了住房一套,购买当月开始还款。其中40万元的公积金贷款采用等额本金贷款方式,贷款利率为5.22%,其余3...
共用题干 马先生2008年1月采用组合贷款法购买了住房一套,购买当月开始还款。其中40万元的公积金贷款采用等额本金贷款方式,贷款利率为5.22%,其余3...
共用题干 马先生2008年1月采用组合贷款法购买了住房一套,购买当月开始还款。其中40万元的公积金贷款采用等额本金贷款方式,贷款利率为5.22%,其余3...
共用题干 马先生2008年1月采用组合贷款法购买了住房一套,购买当月开始还款。其中40万元的公积金贷款采用等额本金贷款方式,贷款利率为5.22%,其余3...
共用题干 苏某(男)的父亲于1975年逝世,留有遗产为房屋(A)一处,由苏某继承,但是直到1977年才取得房产证。1976年苏某与秦某(女)结婚,两人结...
共用题干 苏某(男)的父亲于1975年逝世,留有遗产为房屋(A)一处,由苏某继承,但是直到1977年才取得房产证。1976年苏某与秦某(女)结婚,两人结...
随机试题
出现人工流产综合征应采取的下列措施为 A.继续手术 B.加快手术速度,尽快使
为防止串联谐振过电压烧损电压互感器,倒闸操作时,不宜使用带断口()的断路器投
甲为勒索财物,打算绑架富商之子吴某(5岁)。甲欺骗乙、丙说:“富商欠我100万元
根据我国有关境外投资的外汇管理规定,要求境内投资者应按项目汇出外汇资金的(〉
个人理财业务管理部门的内部调查监督,应重点检查( )的情况。A.理财产品销售人员的资格B.是否存在错误销售和不当销售C.销售业绩是否达标D.业务记录
下列关于自主学习的描述不正确的是( )。A.自主学习有利于激发学生的兴趣B.以学生为学习的主体C.自主学习有利于提高学生的学习质量D.自主学习就是上自习
参与卵磷脂合成的物质有A.CTPB.胆碱C.甘油D.脂肪酸
C级信息机房可设置()。A.局部应用式干粉灭火系统B.高压细水雾灭火系统C.自动喷水灭火系统D.预制型灭火系统E.储压式干粉灭火系统
缺O2和CO2潴留对中枢神经系统可产生的影响,不包括A.出现烦躁不安、谵妄B.出现神志不清、昏迷C.导致脑组织碱中毒D.导致脑细胞内水肿E.导致脑间质
一般情况下,使某投资方案的净现值小于零的折现率( )A.一定小于该投资方案的内含收益率B.一定大于该投资方案的内含收益率C.一定等于该投资