首页
登录
职称英语
[originaltext] Our Milky Way solar system began as small pieces of star-crea
[originaltext] Our Milky Way solar system began as small pieces of star-crea
游客
2024-03-12
38
管理
问题
Our Milky Way solar system began as small pieces of star-created gas and dust. They came together to form the Sun, the Earth and other planets, and life as we know it. But not all the dust was used, and what remains can be dangerous. Scientists are studying this dust with a student-designed instrument on the American space agency’s New Horizons spacecraft. The agency is busy collecting information from the spacecraft this week in the first-ever flyby of Pluto.
David James is a research assistant at the University of Colorado. Our reporter found him in one of the university’s laboratories on a recent day. He was inspecting the settings on a room-size machine.
’’That’s one of the cryopumps. You have to continuously pull air out otherwise it will leak up to the atmosphere again. ’’Those pumps take air from a tunnel or passageway. The process helps scientists make dust on Earth move as fast as it would in space. ’’We’ve even reached 107 kilometers per second is our fastest particle here. ’’The tests may help scientists learn what causes dust to be created in space. It may also help them design spacecraft and equipment that cannot be hurt by dust.
Tiffany Finley was also a graduate student when she began working on the dust counter project, in 2002. ’’This opportunity came up and I said ’What? You’re going to Pluto? I would love to be part of that.’ ’’The dust counter was designed to measure and count the dust that hit and flew by the New Horizons spacecraft as it traveled to Pluto. Tiffany Finley says such a device would usually be created by experts. She later became the manager of the dust project. Today, Ms. Finley is the Science Operations Manager for the New Horizons mission.
Mihaly Horanyi is a professor of physics at the University of Colorado. He also serves as the faculty advisor for the Student Dust Counter project. He says the counter did not cost as much money as it would have if a company built it because so many students were involved. More than 30 students have worked on the project.
The Student Dust Counter was launched with the New Horizons spacecraft in 2006. Six devices on the almost 5-billion-kilometer-long journey were designed to stay quiet during the trip. Now they are operating.They are sending color pictures back to Earth, and studying Pluto’s chemical makeup. But the Student Dust Counter has been operating throughout the trip.
20. What is the sun made of?
21. What was David James doing when the reporter found him?
22. How many students have worked on the Dust Counter project?
选项
A、He was conducting a research in the university’s laboratory.
B、He was inspecting the settings on a room-size machine.
C、He was taking air from a tunnel or passageway.
D、He was designing spacecraft and equipment that cannot be hurt by dust.
答案
B
解析
选项都是以代词 He 开头的,是关于他怎么样的。题目问的是当记者发现David James 的时候,他正在做什么。文中提到David James 正在检查一个房间那般大小的机器上的设置。其他选项都不是David James发出的行为。由此可知,正确答案是B)。
转载请注明原文地址:https://tihaiku.com/zcyy/3528363.html
相关试题推荐
[originaltext]WhenJohnsonworkedinahigh-traveljobmorethanadecadea
[originaltext]WhenJohnsonworkedinahigh-traveljobmorethanadecadea
[originaltext]WhenJohnsonworkedinahigh-traveljobmorethanadecadea
[originaltext]WhenJohnsonworkedinahigh-traveljobmorethanadecadea
[originaltext]WhenJohnsonworkedinahigh-traveljobmorethanadecadea
[originaltext]TodayisarathersaddayforoneoftheLondon’soldestfrie
[originaltext]TodayisarathersaddayforoneoftheLondon’soldestfrie
[originaltext]TodayisarathersaddayforoneoftheLondon’soldestfrie
[originaltext]TodayisarathersaddayforoneoftheLondon’soldestfrie
[originaltext]Oneofthegreatjoysofgardeningistoshareagardenwith
随机试题
Howmuchsleepdoweneed?Itisprobablytruetosaythatuptothirtyyears
A、Thegiftcard’svaliditytimeisshort.B、Thegiftcardhasafewchancestou
35岁,孕39周,GP,无痛性阴道出血5小时,1小时前出现规律宫缩,阴道出血量明
下列关于道氏理论的主要原理,说法正确的是( ) I.市场平均价格指数可以解释
甲公司由于经营不善,连年亏损,已连续3年未能按约分配股息,则持有优先股的股东当年
某教育机构招聘讲师,有5位评委打分,平均分需要达到85分才能正式通过。小王应聘时
-1.6,-4,-6,-3,1.5,( )A.-2.25 B.-1.5 C
企业劳动关系调整信息系统设计的主要内容不包括( )A.信息需求分析 B.信息
下列关于“以情胜情”,不正确的是A.“忧胜喜” B.“恐胜喜” C.“怒胜思
(2017年真题)目前,绝大多数国家采用的外汇标价方法是()。A.英镑标价法
最新回复
(
0
)