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
A、Discovering new life in space. B、Studying meteorites. C、Plotting the courses of asteroids. D、Developing radar telescopes. C信息明
A、Discovering new life in space. B、Studying meteorites. C、Plotting the courses of asteroids. D、Developing radar telescopes. C信息明
admin
2010-09-25
64
问题
M: Hello. This is Greg Rice reporting live in Barrow, Alaska.
W: Hello, Greg. Is everything going smoothly?
M: Yes. I’ve just arrived here in Barrow, Alaska, to bring you live coverage of what appears to be the results of a huge meteorite impact, perhaps the largest in recent history, that occurred just twelve hours ago. The exact location of the impact is unknown, but estimates put it about 20 kilometers south of Barrow based on shock waves felt throughout the region.
W: Are there any witnesses?
M: Yeah. Some witnesses say they saw a bright light streaking through the sky, accompanied by a roaring boom, moments before the impact. It’s unknown whether there are any casualties, but it is unlikely considering this sparsely populated area.
W: It’s said that such impacts were commonplace during the formation of our solar system, and many believe that a meteorite 10 kilometers in diameter which crashed into Earth 65 million years ago led to the mass extinction of many animal species including the dinosaurs.
M: You’re right. But it is often difficult to calculate the number of such large impacts on Earth because erosion and vegetation make it difficult to spot them. In recent years, astronomers have focused more of their attention on the paths of many uncharted space rocks or asteroids floating out there in the hope that we might be able to determine the threat they pose on mankind...This is Greg Rice reporting from Alaska.
W: Thanks, Greg...We’ll keep you up-to-date on any development there.
选项
A、Discovering new life in space.
B、Studying meteorites.
C、Plotting the courses of asteroids.
D、Developing radar telescopes.
答案
C
解析
信息明示题。男士最后说,近年来,天文学家更多地关注许多未知太空岩石或小行星的移动轨道,以希望可以判断出它们对人类造成的威胁,由此可知,天文学家近期工作的重点在于测定小行星的运行轨迹,故选C。
转载请注明原文地址:https://kaotiyun.com/show/7Cz7777K
0
大学英语六级
相关试题推荐
FourMinutesthatGetYouHiredBayStateralwayswantstobeateacher.Withthehelpoffriendswhoteachatschool,shel
FourMinutesthatGetYouHiredBayStateralwayswantstobeateacher.Withthehelpoffriendswhoteachatschool,shel
TheWorldHealth【B1】______saysavianinfluenzacouldbecomeaworldwidethreatunlessgovernmentsactnowtostopit.Officials
A、Itiswellknownallovertheworld.B、Ithasbecomethetopicofanarticle.C、Ithasmadethefront-pageheadlineofthepre
A、Plantingcrops.B、Buildinghouses.C、Clearingnewland.D、Caringforanimals.D事实细节题文中提到拓荒者们由于忙于建造房屋、开垦荒地和种植谷物,没有时间来照看家畜。
A、Thedifferencesbetweensheepandcattlebreeding.B、LivingconditionsinthecolonyofMassachusetts.C、Foodshortagesinthe
A、He’spreparingforatest.B、Helosthisnotes.C、Hemissedtheclass.D、He’sstudyingthissubject.C
A、She’samaid.B、Shesellsstovesandrefrigerators.C、She’sanapartmentmanager.D、She’sarealestateagent.C语义推断题女士在男士一家离
Thetragicimpactofthemoderncityonthehumanbeinghaskilledhissenseofaesthetics,thematerialbenefitsofawealthys
随机试题
心室颤动的临床表现不包括
关于不同组织声衰减一般规律的描述,不正确的是
溃疡边缘不规则,基底有桑椹状小结节,疼痛明显,应为溃疡深大,边缘隆起,呈弹坑样,表面有灰黄色假膜,基底软,应为
弥补财政赤字的办法主要有()
下列中央银行业务中,不属于资产业务的是()。
美术学科最能培养学生审美体验的方面是()。
掌握概念的一般意义,实质上是掌握同类事物的共同关键特征和本质属性,这种学习是()。
ThereisgrowinginterestinEastJapanRailwayCo.ltd.,oneofthesixcompanies,createdoutoftheprivatizednationalrailw
用GHz来衡量计算机的性能,它指的是计算机的_______。
A、 B、 C、 B
最新回复
(
0
)