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
An Expensive Mistake Is there water on the planet mars?Is there life on Mar...
An Expensive Mistake Is there water on the planet mars?Is there life on Mar...
admin
2020-12-24
28
问题
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 these questions. They built a spacecraft to travel around mars and get information. The spacecraft was called the Mars Climate Orbiter.
The Mars Climate Orbiter left for mars in December 1998. The trip took nine and a half months. At first, everthing was fine. However, when the Orbiter got near Mars, something terrible happend. The spacecraft didn’t go to the right place. It went too close to Mars. It was too hot to 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 answer. Two teams of scientists worked together on the Orbiter. One team was in England,and one team 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 system (公制).The other 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 and too hot, and it stopped functioning.
Why didn’t anybody see the mistake before it was too late? Many things contributed to the problem. One thing was that NASA scientist 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 Orbiter 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!
How long did it take the Orbiter to get close to Mars?
选项
A One year.
B Less than one year.
Cbout two and a half years.
D More than three years.
答案
B
解析
第二段第二句"The trip took nine and a half months. ”,由此可知飞行器接近火星用了不到一年的时间。
转载请注明原文地址:https://ti.zuoweng.com/ti/DydQKKKQ
相关试题推荐
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
Theaccidentoccurredjustbecauseofhismistakeindriving.()A.happenedB.brok
共用题干 第一篇AnExpensiveMistakeIstherewaterontheplanetMars?Istherelife...
共用题干 第一篇AnExpensiveMistakeIstherewaterontheplanetMars?Istherelife...
共用题干 第一篇AnExpensiveMistakeIstherewaterontheplanetMars?Istherelife...
Areyoupositivethatthere'sbeennomistake?
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
Itseemedinevitableforhimtomakesuchmistakebecauseofhiscarelessness.()
随机试题
下列选项中,不属于内部审计师在与客户进行沟通时必须要讨论的问题: A、通过调查
房地产市场指标中,市场交易指标包括( )。 A、房地产租金 B、土地转化率
早期无症状,随着肿瘤增大,可由于颌骨膨隆引起牙移位、关系紊乱和颌面部变形。X线表
(2018年)20×7年2月1日,甲公司与乙公司签订了一项总额为20000万元
关于道德评价,正确的说法是( )。
非组织化观摩要求观摩者有相当完备的_和_,否则难以达到观摩学习的目的。
女性,60岁,昨日突发头晕,今晚晕症状加重,下午言语欠清,复视,右侧肢体无力。持续18分钟症状消失,神经系统检查正常,最可能的诊断为A.脑血栓形成B.脑栓塞
男,50岁。右下后牙冷酸食及刷牙时酸痛感,刺激去除后酸痛感立即消失。检查:右下颌第一磨牙牙合面磨损,暴露牙本质,探诊颊牙合斜面有酸痛区,叩痛(-)。考虑该...
劳动安全卫生管理制度的种类包括()。A:安全生产责任制度B:安全生产教育制度C:安全生产检查制度D:安全卫生认证制度E:生理卫生检查制度
A审计人员在审计东湖电脑公司2014年财务报表时发现:东湖电脑公司期末存货采用成本与可变现净值孰低法计价。2014年9月26日东湖电脑公司与M公司签订销售...