After spending years searching for a planet with life, scientists may have found one. In September 2010, a team of US scientists discovered an Earth-sized planet called Gliese 581g. It has a surface temperature neither too hot nor too cold for liquid（液態(tài)）water. Scientists think there is a chance that the planet could have life.
The planet Gliese 581g goes around a star called Gliese 581, which is about 20 light-years from Earth. That is about 194 trillion（萬億）kilometres －500 million times farther away from us than the moon.
A spacecraft traveling at a one-tenth of the speed of light would reach Gliese 581g within about 220 years. A human can’t live that long, but robotic explorers could make the job easier. However, our fastest spacecraft don’t come anywhere near that one-tenth light-speed mark.
At present, scientists don’t know what the surface might be like on Gliese 581g. What they know is that the planet is at the sight distance from its star to have liquid water. It’s also at the right distance to have an atmosphere that could protect the water if it is on the surface.
Although spacecraft won’t be getting there anytime soon, one way to look for life on Gliese 581g is to turn our radio telescopes（望遠(yuǎn)鏡）towards the planet and search for radiation（放射）. By studying the radiation, scientists would find out about the chemicals（化學(xué)物質(zhì)）around the planet and discover it Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea if the planet has life or not. But it’ll probably be many years before we can do this properly.
People have been arguing about whether there is alien life on Gliese 581g. Any discussion about alien life is just guessing at this point, according to its discoverers.
【小題1】 What did scientists find in September 2010?

A．A planet with water. B．A planet similar to the earth.
C．A planet without life.D．A planet near the earth.
【小題2】According to the article, Gliese 581g ________.
A．is at the right distance from its starB．moves around the earth
C．is as far away from us as the moonD．can be reached in about 220 years
【小題3】 Paragraph 5 is mainly about ______.
A．the possibility of living on Gliese 581g
B．the kinds of chemicals around Gliese 581g
C．the way of looking for life on Gliese 581g
D．the aim of studying the radiation on Gliese 581g
【小題4】Which of the following is the best title for the passage above?
A．Gliese 581g, a Likely Living PlanetB．Gliese 581, a Likely Living Planet
C．Gliese 581g and Its StarD．Gliese 581g and Radiation


【小題1】A
【小題1】A
【小題1】C
【小題1】A

解析

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語 來源：2010年寧夏回族自治區(qū)初中畢業(yè)暨高中階段招生考試英語卷 題型：閱讀理解

Plant scientists consider them as fruit. Most other people think of them as vegetables. Whatever you call tomatoes, there are many different kinds of this popular and healthy food.
There are two groups of the plants. Small tomato plants grow to about one meter. They can be planted rather close together. Some short kinds do not require special care and are often gotten crop by machines. Large tomato plants can grow over two meters tall. They also produce larger fruits.
People who grow only a few plants can place wire cages around each one. The cage can be made of wire fence material. The cage helps the plant grow taller and produce a better crop.
Tomatoes often need extra calcium (Ca), or the fruits may be ruined. Add lime to the soil can solve this problem. Dry lands may also ruin the fruits. Tomatoes need water regularly. The soil should never dry out completely. Dried grass or leaves placed around the plant can help hold water in the soil and stop the growth of unwanted plants.
Tomatoes are native to South America. The tomato is a member of the potato family. The leaves of the plant are poisonous, like the leaves of its relatives. Before the 18th century, people grew tomatoes only as pretty plants. They called the bright red fruit a “l(fā)ove apple”, but would not eat it.
【小題1】Which of the following is right about the small tomato plants?
A. They can grow to about 2 meters.    
B. They can’t be planted close together.
C. Some of them don’t require special care.
【小題2】People place wire cages around the plant in order to ___________.
A. protect the plant from being taken by others.
B. help the plant grow taller and produce a better crop
C. keep the plant from being eaten by animals
【小題3】The underlined word “ruin” probably means “___________”.
A. grow     B. destroy      C. stop    
【小題4】 People often give tomatoes extra calcium by ___________.
A. adding lime to the soil          B. watering the plant regularly
C. putting dried grass around the plant
【小題5】What can we learn from the passage?
A. Tomatoes are native to North America.
B. The leaves of the plant can also be eaten.
C. Americans began to eat tomatoes from the 18th century.

查看答案和解析>>

科目：初中英語 來源：2011年山東省濰坊市中考英語試卷 題型：閱讀理解

Mobile phones and the internet have improved our live in many ways. However, along with improvements, they have also brought a number of worrying problems.
Many car accident are caused by mobile phones. You can use many new mobile phones to get on the internet. This can be very convenient, but some drivers get on the internet while driving. Driving needs all our attention. By looking at their mobile phones and not at the road, these insensitive Drivers are a danger to us all.
Many of the dangers of the internet are well known. Children who visit websites without their parents’ permission sometimes talk to older people they don’t know and put themselves in great danger. People with blogs sometimes post embarrassing photographs of people they don’t know on their websites without permission. There are also people who use the internet to get personal information that we do not want them to have.
Mobile Phone and Internet Safety Tips
If you need to use a mobile phone with you drive use a “hands-free” phone.
In difficult driving situations such as rain or snow, do not use your phone at all.
Do not make very important phone calls while driving. They take your attention off the road.
Tell your children not to talk with anyone they do not know on the internet.
In an embarrassing situation, pay attention to people around you. People will be shy about taking your picture if they know you’re paying attention.
Refuse to give out any information personal information on the internet.
【小題1】Which of these dangers of mobile phones or the Internet is Not mentioned in the passage?

A．You can have a car accident.
B．Someone can post your photograph on the internet.
C．Someone can get your personal information
D．Someone you do not know can call you.
【小題2】 A “hands-free” mobile phone is probably a mobile phone that _____.
A．is free to use B．can be used without your hands
C．can be used with only one hand D．can be use only in ears
【小題3】 What advice is given in the passage to stop someone from taking an embarrassing picture of you?
A．Pay attention to the people around you.
B．Don’t give out your personal information.
C．Use a “hands-free” mobile phone.
D．Wear your camera phone on you belt.
【小題4】Which is the best title of the passage?
A．Internet Problems
B．Mobile Phone and Internet Dangerous
C．The Development of Mobile Phone and Internet
D．The Advantages of Mobile Phone and Internet

查看答案和解析>>

科目：初中英語 來源：2010—2011學(xué)年廣西灌陽縣七年級(jí)下學(xué)期期末質(zhì)量檢測(cè)英語卷 題型：閱讀理解

Robots have come a long way since 15th century. We’ve got robots to build cars, carry heavy things, work in dangerous places and explore planets. But things haven’t stopped there.
In 1986, Honda made a robot called ASIMO. And now, it has been developed greatly. Standing at 130cm and weighing 54kg. ASIMO is very much like a small astronaut wearing a bag on the back. And he can walk, flight, climb and run fast. Isn’t it wonderful?
The world’s first robot teacher is Saya. With her human-like face, she can show expressions like happiness, surprise, sadness, dislike, fear and she can even smile or show anger at students, which look much like a real teacher’s. To do this, her rubber skin is pulled from the back with motors inside. And her eyes and mouth have wires(電線) too. She can also say some simple words like “hello” or “thank you”.
In the UK, the development of robots is exciting. The mini-robots will send food, clean floors, collect and throw away waste. These robots can open doors by themselves and stop if anything or anyone is in the way.
These mini-robots are very useful for controlling infection(傳染). Usually clean and dirty work is done by the same person, but here, you’ll have robots that do”dirty work”, like collecting dirty sheets, or taking away hospital waste; and you’ll have robots that do”clean work”, like bringing meals or clean sheets to patients. The robots have separate work so there’s no way for infection, which is great. But of course, robots would not take the piece of humans, but would free up more time for nurses to be with patients.
But if this is what it’s like in 2011, what’s it going to be like to 2021?
【小題1】In the following, which is ASIMO’s behavior?

A．Smiling at people, saying “hello”.
B．Sending food or opening doors by himself
C．Fighting, climbing or running fast
D．Collecting waste for patients
【小題2】What makes Saya look real?
A．Her face and rich expressionsB．Her clothes and shoes
C．Her walking and running speedD．Her rich knowledge
【小題3】Which of the following is true according to the passage?
A．Robots have come a long way since 1986.
B．The first robot teacher was made by Honda.
C．Saya looks like a small astronaut.
D．If anyone or anything is in the way, mini-robots will stop.
【小題4】The main idea of Paragraph 5 is that _______.
A．nurses would have more free time with patients
B．robots would not take the place of humans
C．dirty and clean work is always done by the same person
D．mini-robots are useful for controlling infection

查看答案和解析>>

科目：初中英語 來源：2011年廣東省中考英語試卷（解析版） 題型：閱讀理解



In many high schools，there are strict rules about using mobile phones. If your phone rings in class，for example，the teacher will be very angry.
Every mobile phone has a ringtone (鈴聲). It tells you that someone is calling you. Now，there is a ringtone called “mosquitotone (蚊子鈴聲)”. Using it，students can receive calls and text messages (短信) in class but the teacher will not realize what is happening. How?
Mosquitotone has a special sound. Only children and teenagers can hear it. As we get older，we are unable to hear some sounds with high frequencies (頻率). As a result，a child or teenager can hear the mosquitotone ringtone, but it’s_inaudible_to someone 20 or older.
But sometimes，people over 20 can hear the ringtone. One British student’s phone uses mosquitotone. In class，the student’s phone rang. The 32­year­old teacher looked at the student and became unhappy. “I heard that. You know the rule：no mobile phone in class.”
Not all the students are interested in mosquitotone. Jerry Jones，a high school student of 17，says，“Using mosquitotone too often is bad for our hearing. I may use it for pleasure，but not in class. It’s unfair to the teachers！”
What do parents think of mosquitotone？“I think it is perfect for places like movie theaters，” says Connie Neeson,44.“Think about it. Yon’re watching a film and someone’s mobile phone rings. Mosquitotone is good because many people don’t hear it. However，it also has a bad influence on their study if students use it in class.”
【小題1】Mosquitotone works because ________.

A．it is very loudB．it has no sound
C．it has a beautiful soundD．it uses high frequencies
【小題2】The under lined part “it’s_inaudible_to” means “________”．
A．it can’t be seen byB．it can’t be heard by
C．it isn’t popular withD．it isn’t healthy for
【小題3】The 32­year­old teacher felt unhappy because the student ________.
A．was late for classB．didn’t do his homework
C．couldn’t answer her questionD．was using a mobile phone in class
【小題4】Connie Neeson thinks that mosquitotone ________.
A．has no bad influenceB．is unfair to the teachers
C．has its advantage and disadvantageD．can’t be used in any public place

查看答案和解析>>

科目：初中英語 來源：2010年長(zhǎng)春外國(guó)語學(xué)校初三上學(xué)期期中考試英語試題 題型：完型填空

The 2010 Winter Olympic Games will take place in Vancouver and Whistler(惠斯勒) from February 12 to 28. As the world’s 【小題1】_____ athletes will compete there, Canada is preparing for it well.
It will be broadcasted(播出) in Canada’s two 【小題2】_____languages——English and French. Billions of television viewers worldwide will 【小題3】______ the opening ceremony of the 2010 Winter Olympic Games. Athletes from more than 80 【小題4】______ will compete in 86 medal events over 17 days. Then the Paralympics(殘奧會(huì)) will 【小題5】_____ from March 12 to 21. Canada has 【小題6】_____ millions of dollars preparing. Thousands of spectators will visit the country. Canada will be 【小題7】_____ it all.
The building of Olympic gyms began in 2005. Opening and closing ceremonies will be held indoors, at BC Place Stadium. It’ll 【小題8】______55,000 seats. Some competitions, 【小題9】______ ski, and bobsled, will take place in Whistler. It’s a ski village. During the Games, roads will be closed. More than 15,000 policemen will work to 【小題10】______ the peace throughout the Games.
The United States is the only country to host the Winter Games four times. Team USA hopes 2010 will be a golden year.

【小題11】
A．worstB．bestC．cleverestD．tallest
【小題12】
A．specialB．unusualC．officialD．ordinary
【小題13】
A．watchB．noticeC．lookD．hear
【小題14】
A．citiesB．townsC．villagesD．countries
【小題15】
A．runB．beginC．stopD．end
【小題16】
A．paidB．tookC．costD．spent
【小題17】
A．full ofB．ready forC．worried aboutD．a(chǎn)fraid of
【小題18】
A．giveB．serveC．holdD．host
【小題19】
A．withB．includingC．a(chǎn)sD．so
【小題20】
A．keepB．makeC．letD．protect

查看答案和解析>>

科目：初中英語 來源：2010年江蘇省常州市第五中學(xué)初三英語單選競(jìng)賽題 題型：完型填空

Many people say that they have seen flying saucers（飛碟）in the sky.   31  can these things be ?
Some people think that they are spaceships from other planets. Doctors   32  that perhaps they are only a weakness of the eyes. It is possible that they are our own planes   33  very high. Or are they birds with the sun’s light on them?
But some people say that they have seen them   34 . They have seen beings（人）get off them and walk around. They have   35   to those beings, sometimes in English. People have   36   photos of flying saucers and of these beings. We have seen the photos, but sometimes the people had to take them in a   37 . Children have seen flying saucers, and even dogs have seen them. Perhaps we do not think that the   38  of children, or dogs are important. But school-teachers have   39  seen them and Air Force officers and   40  policemen. Must we not listen to these people?
【小題1】  

A．HowB．WhatC．WhichD．Where
【小題2】  
A．sayB．proveC．knowD．understand
【小題3】  
A．risingB．flyingC．risenD．flown
【小題4】  
A．flyB．turnC．landD．move
【小題5】  
A．flownB．goneC．comeD．spoken
【小題6】  
A．receivedB．boughtC．takenD．sent
【小題7】  
A．horseB．hurryC．colourD．way
【小題8】  
A．opinionsB．discussionsC．suggestionsD．needs
【小題9】  
A．oftenB．hardlyC．a(chǎn)lsoD．still
【小題10】 
A．yetB．evenC．soD．then

查看答案和解析>>

科目：初中英語 來源：2011年四川省遂寧市中考英語試卷 題型：完型填空

Around the world, people have different ideas about what good manners are.
When you go to restaurants in different parts of the world, it’s  46 to know the right and wrong things to do. For example, in China it’s OK to  47 a lot of noise in a restaurant. In fact, if a restaurant isn’t   48 or lively, you may think there’s something wrong with it. However, in many western countries, restaurants are quiet places. If a table is too loud, other people who are eating there might even  49 to the owner of the restaurant.
Paying the bill    50 also different from country to country. In China, one person usually pays  51 everybody. In western countries, one person pays if he or she is entertaining clients(宴請(qǐng)賓客), but  52 friends eat together, they usually share the cost. This is called “Going Dutch（均攤費(fèi)用）”.Also, when westerners pay the bill, they usually leave some money for the  53 .This is called “l(fā)eaving a tip(小費(fèi))”. Leaving a tip is thought to be polite. In the US, it’s  54 to leave tips of 10％,15％,or 20％ of the bill, which is decided by how good the service is. Good waiters can make a lot of money!
The way people eat food is different in the world, but you can  55 the same kind of food in many countries. Chinese and Italian food, for example, are popular all over the world.
【小題1】A. popular           B. difficult              C. important
【小題2】A. cause             B. keep                 C. make
【小題3】A. noisy             B. noise                C. lucky
【小題4】A. shout              B. explain              C. complain
【小題5】A. are               B. is                  C. be
【小題6】A. on                B. for                 C. in
【小題7】A. until               B. when               C. unless
【小題8】A. gatekeeper          B. seller               C. waiter
【小題9】A. terrible             B. common             C. serious
【小題10】A. invent              B. find                C. prefer

查看答案和解析>>

科目：初中英語 來源：2010年湖北省咸寧市中考英語真題 題型：閱讀理解

What might the future be like? Here are some predictions: things to come, things to go.
The Spring Festival, the most important Chinese holiday when everyone returns home, has caused headaches for millions of Chinese. More than 2 billion people travel at the same time, making getting travel tickets and the journey difficult. But in 28 years, Spring Festival travel may not be a problem at all. China plans to build more than 120,000 kilometers of railway and a fast transportation network that will serve 90% of the population by 2020. And because most of China will be cities, people will not have to go to other places to find a job, so it will no longer be a problem.
Newspaper will come to an end in 2043. In the future, digital(數(shù)字的) newspapers will be sent to personal web tools through Internet. Readers can discuss topics with journalists and editors. Information will move faster.
Oil is running out faster than expected. But scientists have found something else for oil as fuel(燃料). Coal, natural gas, solar power, nuclear power and even water can take the place of oil as sources of energy(能源).
Schools will go electronic(電子化). Computers will be important and popular among the students. Everything will be in the computer and students will not need to bring books to school. They will find information on the Internet. A computer will be the students’ library, schoolbag and connection to the outside world. There will be robot teachers, they will check homework on computers and communicate with the students’ parents through e-mail. And school buses will be like spaceships, comfortable and safe.
【小題1】 More than 2 billion people have a hard time returning home during                .

A．Christmas DayB．National Day
C．the Spring FestivalD．the Mid-autumn Festival
【小題2】The newspapers will disappear                .
A．in 28 yearsB．by 2020 C．by 2053D．in 33 years
【小題3】               is not mentioned in the passage as sources of energy.
A．CoalB．WindC．Nuclear powerD．Water
【小題4】From the passage we can know                 in the future.
A．the Spring Festival travel may still be a problem
B．90% of the population will live in the city
C．robot teachers will check homework
D．readers can discuss topics with each other through Internet
【小題5】What’s the main idea of the last paragraph?                 .
A．Schools will go electronicB．Computers will be important
C．There will be robot teachersD．School buses will be like spaceships

查看答案和解析>>

同步練習(xí)冊(cè)答案