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
An Expensive Mistake Is there water on the planet Mars? Is there life in Mars? Was there ever life on Mars? Scientists from
An Expensive Mistake Is there water on the planet Mars? Is there life in Mars? Was there ever life on Mars? Scientists from
admin
2013-06-24
57
问题
An Expensive Mistake
Is there water on the planet Mars? Is there life in 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, 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 answer. Two teams of scientists worked together on the Orbiter. One team was in England, and one team was in 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 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 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.
C、About two and a half year.
D、More than three years.
答案
B
解析
题意:轨道器需要多长时间接近火星?不到一年。短文第二段前两句提到,火星气候轨道器于1998年12月向火星进发,旅程用了九个半月。故此选B。
转载请注明原文地址:https://www.kaotiyun.com/show/xsFd777K
本试题收录于:
职称英语综合类C级题库职称英语分类
0
职称英语综合类C级
职称英语
相关试题推荐
FreezingtoDeathforBeautyPeopleinBeijingwearalotofclothingduringwintertofendoff(抵御)thecold.IntheUnitedS
FreezingtoDeathforBeautyPeopleinBeijingwearalotofclothingduringwintertofendoff(抵御)thecold.IntheUnitedS
Jensenisadangerousman,andcanbeverybrutal.
AFord’sFollowersBTheAssemblyLineCFord’sGreatDreamDTheEstablishmentoftheCompanyEFord’sBiggestContributio
Theword"mirror"inthefirstlinecouldbebestreplacedbyAIthouseBusCompanywasfoundedby
AFord’sFollowersBTheAssemblyLineCFord’sGreatDreamDTheEstablishmentoftheCompanyEFord’sBiggestContributio
Theindexisthegovernment’schiefgaugeoffutureeconomicactivity.
Oneofthemostimportanttechnologicaldevelopmentsduringthe1980shasbeentheemergenceofopticalfibercommunicationasa
Manhasthreebasicneeds:food,shelterandclothing.
随机试题
风湿性心脏病行二尖瓣瓣膜置换术后1个月,凝血功能检查示PPT为20秒,可告知病人( )。
患者,女,20岁。月经量少不规则。因血压升高,血糖升高,向心性肥胖,脸部皮肤薄、红住院。查血压180/100mmHg,CT结果为垂体生长肿物,X线显示骨质疏松。该患者可能患的是
成人膀胱的容积是
设高温热源的热力学温度是低温热源的热力学温度的n倍,则理想气体在一次卡诺循环中,传给低温热源的热量是从高温热源吸取的热量的()。
关于期货公司风险监管报表,正确的说法有()。
请简要阐述反映信息系统的成本和效益的主要分析指标。
以下是某一《建立网页》教学设计的案例,阅读材料。一、教学目标:1.了解网页制作工具;2.掌握新建站点的方法,学会新建、保存网页;3.懂得打开、关闭网页。二、教学重难点:1.教学重点:新建站点、网页文件;2.教学难点:理解站点概括,掌握首行缩进方法。三
(2018·辽宁)如果一个学生将自己的失败归因于个体稳定的、不可控的、内部因素时,他会说()
网络安全攻击方法可以分为服务攻击与______攻击。
在报表中对教师数据按"学院"分组,设置文本框"控件来源"属性为"=count(*)",下列关于该文本框说法中,正确的是
最新回复
(
0
)