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
专升本
On a clear night you can see many stars in the sky. These stars are millions of miles away. Are there living things on any of th
On a clear night you can see many stars in the sky. These stars are millions of miles away. Are there living things on any of th
admin
2011-04-26
22
问题
On a clear night you can see many stars in the sky. These stars are millions of miles away. Are there living things on any of the stars? People have always thought about this question. They could not find the answer before now. Today scientists know more about space than ever before. Some machines can help them look for the answer.
How will scientists do this? People can’ t go to the stars. The stars are far away. A person would take hundreds of years to the next star in a spaceship. So scientists are sending out radio signals. These signals travel in space at the speed of light. At that speed, radio signals will take 25 years to reach the next star. The signals ask "Is there anyone out here?". Living things in space must have machines to hear the signals. We will not get an answer to our signals for more than 50 years. However, scientists are already listening. Someone from space may be trying to send signals to us, too.
Scientists also have sent large telescopes into space. A telescope can make things look larger. The telescopes are going around the earth. They are looking for life on other worlds. In the next few years we may get an answer to the question, "Is there life in space.
"Are there living things in space?" " ______."
选项
A、We have already got an answer to this question
B、We will never get an answer to this question
C、We got an answer to this question long ago
D、We may get an answer to this question in the next few years
答案
D
解析
文章最后一句告诉我们,在未来的几年里,我们也许就得出这个问题的答案了。
转载请注明原文地址:https://kaotiyun.com/show/K5qC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Greatwritersarethosewhonotonlyhavegreatthoughtsbutalsoexpressthesethoughtsinwordswhichappeal______toourmin
WhendidFather’sDayofficiallybegintohavenationalpopularity?WhichstatementisTRUE,accordingtothispassage?
WhendidFather’sDayofficiallybegintohavenationalpopularity?WhofirststartedtheideaofholdingtheFather’sDay?
Carsare【B1】importantpartoflifeintheUnitedStates.Withoutacarmostpeoplefeelthattheyarepoor.Andevenifapers
Whilemakingtremendousachievementsatcollege,Asian-Americanstudents______.Whatarethemajorfactorsthatdeterminethe
HolidaycelebrationsintheUnitedStatesoften______.Thejudge______.
HolidaycelebrationsintheUnitedStatesoften______.Mary’sbirthmother______.
Choosethecorrectstatement.Whichhappenedlast?
随机试题
证券市场监管的原则有()
由原发证机关注销《药品经营许可证》的情形不包括
某带转换层的框架一核心筒结构,抗震等级为一级;其局部外框架柱不落地,采用转换粱托柱的方式使下层柱距变大,如图6-24所示。梁、柱混凝土强度等级采用040(ft=1.71N/mm2),钢筋采用HRB335(fyv=300N/mm2)。试问:下列对转换梁
实验者是化学实验的主体,其根本属性是()。
根据下面材料回答下列问题。中关村上市公司协会公布的《2016年中关村上市公司竞争力报告》显示,2015年,中关村上市公司总营业收入达到2.34万亿元,同比增长28%。截至2015年年底,中关村E市公司总市值达到48175亿元,同比增幅54%,较2011年
数据16、18、20、22、17的平均差为
简述格雷欣法则及其在日常生活中的运用。
下面指令序列执行后完成的运算,正确的算术表达式是( )。 MOV AL,BYTE PTR X SHL AL,1 DEC AL MOV BYTE PTR Y,AL
下列有语法错误的赋值语句是( )。
Forthistask,youwillwritearesponsetoaquestionaboutareadingpassageandalecture.Youmaytakenotes,andyoumayuse
最新回复
(
0
)