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
Read the following passages, eight sentences have been removed from the article. Choose from the sentences A-H the one which
Read the following passages, eight sentences have been removed from the article. Choose from the sentences A-H the one which
admin
2017-04-19
33
问题
Read the following passages, eight sentences have been removed from the article.
Choose from the sentences A-H the one which fits each gap.
For each gap(1-8)mark one letter(A~H)on the Answer Sheet.
Buzz Aldrin, the second man to walk on the Moon, is a long-time fan of space tourism. Aldrin climbed out of Apollo 11 hot on the heels of Neil Armstrong in 1969. 【R1】______
Together with scientists from Purdue University, the Massachusetts Institute of Technology, and the University of Texas, Aldrin is designing spacecrafts that would perpetually cruise between Earth and Mars.【R2】______"Some day, people will go to Mars on a regular basis," says team member James Longuski, a professor at Purdue. "【R3】______"
The average distance between Mars and Earth is 48 million miles. 【R4】______
It sounds like a trip that would require a lot of fuel. According to the engineers, the cyclers may have a natural, renewable "fuel" supply: from the gravitational forces of the Sun, the planets, and their moons.
As a spacecraft travels close to a planet, its flight path is bent, causing it to whip around the planet and significantly increasing its speed(it’s as if the planet’s gravity gives the passing spacecraft a kick into space).【R5】______It’s not just science fiction: it might help us get Mars with very little fuel on board, in a journey that would take as little as six to eight months.
"The cycler is essentially in orbit around the Sun and makes regular flybys of Earth and Mars," says James Longuski. "Once you put your vehicle into a cycler orbit, it continues on its own momentum, going back and forth between Earth and Mars.【R6】______"
When the cycler flies by Earth, it will be traveling at a speed of about 13,000 miles per hour.【R7】______"This is sort of like a bus that doesn’t stop," Longuski says. "When it comes by, you have to run alongside of it and grab on."
Aldrin and his group think that the first cycler could be on its way by as soon as 2018. 【R8】______ (It seems a long way off now, but it’s closer than you think!)
Fasten your seatbelts and make sure your seatback is in its upright position. Your flight to space may be departing soon.
A. These crafts, known as "cyclers", would ferry people and supplies between the two planets, enabling humans to colonize Mars — something that has long been dreamed about in science fiction.
B. Most people are convinced that we are going to do this; the only question is when.
C. So, if you’re in middle school now, you could be taking a trip to Mars by the time you’re in your thirties.
D. To get a sense of just how far this is, try doing this calculation: Given that there are 2,500 miles between New York and Los Angeles, how many times would you have to travel from NY to LA and back to cover the same distance?
E. Now, at the age of 72, Aldrin is working on a new project that could put more of his fellow humans in space — namely, on journeys to one of our most fascinating neighbors, Mars.
F. This is the "slingshot" trajectory that you may have seen in movies.
G Space taxis will be needed to bring people from the surface of the planet to intercept the cycler. H. You may need to carry some propellant for an occasional boost, but it’s pretty much a free trip after that.
【R5】
选项
答案
F
解析
第5段介绍了“骑车人”的飞行路径,当飞船靠近行星时,它的飞行路径就会变弯,使得飞船急剧加速。而句F“这就是你或许在电影里看到的弹射飞行轨道。”是对前一句的进一步解释说明,因此选F。
转载请注明原文地址:https://jikaoti.com/ti/kyHsFFFM
本试题收录于:
BFT阅读题库国际化人才外语考试(BFT)分类
0
BFT阅读
国际化人才外语考试(BFT)
相关试题推荐
Lookatthefollowingstatement:Beingcreativeisthekeytocareersuccess.Doyouagreeordisagreew
ReadthisletterfromMs.Lee.KEGAUDIOMAIDSTONKENTME156QPTel:(01622)672261Fax:(01622)750653Mr.YoshiWatenable2-9-9S
Readthefollowingstatement:Onlyunderofficiallawsoradministrativeregulationscanwedefendastableandreliableexa
Writeaboutthefollowingtopic:Technologygivesyoungpeopletodayknowledgeandpowerthattheyhaveneverhadbefore.Th
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
HereisaletterfromColoradoStateUniversitytoinformtheapplicantMr.LithathehasbeenadmittedtoCognitivePsychology
Youareaskedtowriteacompositioninwhichyougiveyourownopinionsonthefollowingstatement:Trafficandhousingpro
Readthefollowingletterandcompletethegiveninformationform.Writeaword,phraseornumberinthespaces1-5.De
随机试题
急性盆腔炎的后果有()
临床上慢性化脓性中耳炎分为三型
关于自动洗片机的工作流程,错误的是
女性,28岁,患风湿性心脏病二尖瓣狭窄6年,日常活动即出现胸闷、气短,做心脏彩超示重度二尖瓣狭窄该患者劳累后气促主要是由于
甲企业为增值税一般纳税人,2014年甲企业相关财务资料如下:(1)取得产品销售收入1000万元,出租固定资产取得租金收入20万元。(2)应扣除的产品销售成本200万元,与租金收入有关的费用支出9万元。(3)缴纳增值税173.4万元,营
下列说法中,正确的有()。
(2015年)下列关于上市公司市场增加值业绩评价指标的说法中,正确的有()。
在窗体上画一个名称为Labell的标签,然后编写如下事件过程。PrivateSubForm_Click()Dimarr(10,I0)AsIntegerDimiAsInteger,jAsInte
______thecause,thehatebetweenthesemengrewdeeperanddeeper.
Indiaisacountrywithatleastfiftymajorregionallanguages,ofwhomfourteenhaveofficialrecognition.
最新回复
(
0
)