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
51
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/LvpQKKKQ
相关试题推荐
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
Itseemedinevitableforhimtomakesuchmistakebecauseofhiscarelessness.()
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...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
Theaccidentoccurredjustbecauseofhismistakeindriving.()A.happenedB.brok
随机试题
与其他金融机构相比,商业银行最明显的特征是()。 A.以盈利为目的 B.提供
正常椎体骨骺的骨化中心出现于 A.6~11岁 B.7~12岁 C.8~13
某施工企业经过投标获得了某工程的施工任务,合同签订后,公司有关部门开始选派项目经
资本成本是投资人的( ),是投资人将资金投资于其他同等风险资产可以赚取的收益。
穿越铁路的燃气管道的套管应符合的要求,正确的有()。 A.套管顶至铁路轨道不应
有利于儿童心理健康的因素是A.经历火灾、地震等重大事件B.父母吵架、打孩子C.亲人病故D.经常受到鼓励E.总是受到老师的批评和家长的指责
无明显症状的轻度子宫内膜异位症患者选择A.保留生育功能手术B.保留卵巢功能手术C.根治性手术D.单纯药物治疗E.期待治疗
甲房地产经纪公司(以下简称甲公司)在某城市开设了多家连锁门店,采用计算机网络系统管理房源信息,建立客户数据库管理客户信息。张某看到甲公司在网络上发布的房源...
关于期货套利交易的正确描述包括()A.期货套利交易成本一般要低于期货投机交易成本B.跨期套利,跨市套利和跨品种套利都属于价差套利C.提高了市场流动性D.是
理财师整天与客户打交道,仅仅掌握一些理论知识和概念是不行的,还必须具备相关的市场营销和客户服务技能,其中营销技能的作用首当其冲。( )