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
45
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!
Why didn’t NASA scientists identify the problem before the Orbiter left for Mars?
选项
A They didn't know the English system.
B They were tired from working long hours.
C They were sure of the success of the trip.
D 丁hey didn’t get enough research funding.
答案
B
解析
第五段首句的问题即是题目的问题,在段尾给出了答案:“they were very tired from working long hours.”。
转载请注明原文地址:https://ti.zuoweng.com/ti/TydQKKKQ
相关试题推荐
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
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...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
AnExpensiveMistake Istherewaterontheplanetmars?IstherelifeonMar...
随机试题
4,12,14,20,27,()。 A.34 B.37 C.39 D.4
图5-7为1OkV屋内配电装置,安装地的海拔髙度不超过1000m,请按最小电气
下列选项中,对资产评估专业人员监督管理的主要内容正确的有()。
患者,女性,52岁。因“风湿性二尖瓣狭窄,心房颤动”入院,心律极不规则,心音强弱
关于亚洲各地理要素间因果关系描述不正确的是:
既喜涌吐痰饮,又善截疟的药是 A.胆矶B.常山 C.皂荚D.瓜蒂 E.
4岁的成成上床睡觉前非要吃糖不可。妈妈一个劲儿地向他解释睡觉前不能吃糖的道理,成成就是不听,还扯着嗓子哭起来。妈妈生气地说:“再哭,我打你。”成成不但没停...
股票分析中,技术分析方法主要有()。 ①K线理论 ②形态理论 ③波浪理论 ④循环周期理论A.①②B.③④C.①②④D.①②③④
关于一室模型静脉注射的叙述错误的是A:药物进入体内迅速分布于可分布到的机体各部位B:药物在血液、组织与组织液之间处于动态平衡的均一状态C:均一状态是指药物在
消费者有权要求经营者提供所销售商品的产地信息、检验合格证明等,这种消费者权利属于()A.自主选择权B.公平交易权C.真情知悉权D.安全保障权