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
34
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
When did the Orbiter's problem begin?
A:Right after it left for Mars.
B:Right after it landed on Mars.
C:When it got near Mars.
D:When it returned to Earth.
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/dEpQKKKQ
相关试题推荐
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 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
乳痈切开排脓的切口应该是()。 A.切口尽量大 B.切口宜高 C.纵切口
肠炎型细小病毒的潜伏期为() A.3~5d B.4~6d C.7~14d
下列各项中,应填入资产负债表“货币资金”项目的有( )。
《中华人民共和国药典》、国家食品药品监督管理总局颁布标准收载的处方属于
常用于注射剂的抑菌剂是
提示室性心动过速的特征性心电图改变是: A.QRS波群电交替 B.室性融合
针对很重视安全性的瑞典市场,美国的一家台式计算机制造商开发出了一种特别的显示屏,这种显示屏产生的环绕使用者的电磁场比正常的屏幕产生的电磁场弱很多。尽管比其...
银行对不良个人住房贷款应采取电话催收、信函催收、上门催收、通过中介催收、法律手段催收等方式。()
一个测验能测出它所要测量的属性或特点的程度是指其()。A.难度B.信度C.效度D.区分度
以下关于白芍性状的描述,正确的是A.纺锤形,表面类白色B.圆锥形,表面黄白色C.圆锥形,表面类白色D.圆柱形,表面棕褐色E.圆柱形,表面浅红棕色或类