2. There are four (街区) in my city.
小学教材全测系列答案科目：初中英语 来源： 题型：
B
Is there intelligent (有智力的) life on other planets? For years,scientists said “no” or “we don't know”. But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文学家) . They believe intelligent life exists (存在) somewhere in the universe. They also think we will soon contact these beings (人;生物) .
Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time. Scientists believe the universe is about 12 billion years old. “This is long enough for other planets to have intelligent life ,” say Shostak and Barnett. The second reason is size—the universe is huge. “Tools like the Hubble Telescope (哈勃望远镜) have shown that there are at least 100 billion galaxies ,” says Shostak. “And our galaxy,the Milky Way,has at least 100 billion stars. Some planets going around these stars might be similar to Earth."
In the past,it was hard to look for signs of intelligent life in the universe. But now,powerful telescopes (高倍望远镜) allow scientists to discover smaller planets —the size of Mars or Earth一in other solar systems. These planets might have intelligent life.
Have beings from space already visited Earth? “Probably not ,” says Shostak. “It's a long way away. However,intelligent beings may contact us in other way,such as radio signals (信号) .In fact,they rxlay be trying to communicate with us now,but we don't have the right tools to receive their messages. However,this is changing. By 2025,we could make contact with other life forms in our universe and we might help each other.”
() 6. Seth Shostak and Alexandra Barnett are .
A. astronomers B. farmers C. singers D. drivers
() 7. What is the best title for Paragraph 2 ?
A. The Age and Size of Earth
B. Our Galaxy： The Milky Way
C. Why Intelligent Life Might Exist
D. Earth： The Only Planet with Intelligent Life
() 8. Why was it hard to look for signs of intelligent life in the universe in the past?
A. There were not any smaller planets.
B. There were not any powerful telescopes.
C. The astronomers were not interested in them.
D. The Milky Way didn^ exist at that time.
() 9. Why haven’t beings from space visited us yet according to Shostak?
A. Because they’re afraid of us.
B. Because it's a long way away.
C. Because they don't want to see us.
D. Because they don't know how to use radio signals.
() 10. What does the underlined phrase “life forms” in the last paragraph mean?
A. messages B. tools
C. intelligent beings D. radio signals
查看答案和解析>>
科目：初中英语 来源： 题型：
() 5. jeans were invented over 100 years ago,they’re still in fashion today.
A. Because B. If C. Although D. Since
查看答案和解析>>
科目：初中英语 来源： 题型：
() 15. Mr. Wang has left for Guangzhou. He a speech there in two days.
A. gives B. gave C. will give D. has given
查看答案和解析>>
科目：初中英语 来源： 题型：
() 3. They’ll Shanghai two days.
A. leave for;in B. go for;in C. leave to;for D. go to;for
查看答案和解析>>
科目：初中英语 来源： 题型：
() 10. —David saved an old man in danger yesterday.
— We should learn from him.
A. What a kind boy! B. What a lucky boy!
C. What a lucky old man! D. What a kind old man!
查看答案和解析>>
科目：初中英语 来源： 题型：
Ⅴ.用方框内所给单词或词组的正确形式填空
1. Chairman Mao that The People's Republic of China had been founded in 1949 in Beijing.
查看答案和解析>>
科目：初中英语 来源： 题型：
() 2. —Why don't you your teacher for help? —Good idea.
A. ask B. to ask C. asking D. asks
查看答案和解析>>
科目：初中英语 来源： 题型：
() 5. —WeVe waited for the two singers for two hours. Will they be able to come here?
—I'm afraid of them will come today.
A. both B. either C. neither D. none
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com
