The earth is the only planet that scientists think has life. Why does the earth have life while the other planets (行星) don't? For one thing, the earth is just the right temperature. As the_third_planet from the sun, the earth seems to be just the right distance away. The planets which are closer to the sun are hot that their surfaces bake (烘烤) in the sun. The farthest planets are cold balls.
When the earth developed — which scientists believe may have happened about 4 billion years ago — many gases covered the earth. The gases caused the earth to be hot. But something wonderful happened. The temperature was just right for thick clouds to form. It rained very hard for a very long time. This gave the earth its oceans. Water made it possible for plants to grow. The plants created oxygen in the atmosphere. Oxygen is the gas that humans and animals breathe.
Only one other planet in the solar system seems to be something like the earth. That planet is Mars (火星). Mars is smaller than the earth, and it is quite a bit cooler. But it is not too cold for humans. On some days, the temperatures are as low as a winter day in the northern United States. If you wore a special space suit, you could walk around on Mars. You would have to bring your own air to breathe, the air on Mars is too thin to breathe.
Mars has the largest volcano (火山) in the solar system. It is sixteen miles high. The highest volcano on the earth is five miles high. The most unexpected (未預測到的) sight on Mars is dried up river beds. Scientists believe that Mars was once much better than it is now. Does this mean there could have been living things on Mars? Scientists are not sure, but there has been no sign so far.
【小題1】Which of the following is NOT the reason that the earth has life?
| A．The earth is just the right temperature. |
| B．The volcanos on earth are lower than those on Mars. |
| C．There is oxygen in the atmosphere of the earth. |
| D．The earth seems to be just the right distance away from the sun. |
| A．the Sun | B．the Moon |
| C．the Earth | D．the Mars |
| A．There could have been living things on Mars. |
| B．Mars has the largest volcano in the solar system. |
| C．There is almost no oxygen in the air on Mars. |
| D．Mars is smaller than the earth, and it is quite a bit cooler. |
【小題1】B
【小題2】C
【小題3】A
解析試題分析：文章大意：地球適合人類生存在于它合適的溫度，科學家研究發(fā)現(xiàn)火星也比較適合人類生存。
【小題1】B細節(jié)理解題。文中提到地球是可證實的唯一有生命存在的太陽系行星，其原因包括地球合適的溫度、距太陽距離適中和大氣里含有氧氣等。B項火山與此無關。故B正確。
【小題2】C詞義推測題。根據第一段中內容及As the third planet from the sun, the earth seems to be just the right distance away.可知距離太陽第三遠的行星指的是地球。故C正確。
【小題3】A細節(jié)理解題。文章最后一段提到火星上有干涸的河床的跡象，但這一點并不能證實火星上存在生命，因為還沒有生命跡象，故A項不正確。其他三項都與文章相符。故A正確。
考點：考查科普類短文閱讀
新課標同步訓練系列答案
一線名師口算應用題天天練一本全系列答案科目：高中英語 來源： 題型：閱讀理解
Password (密碼) strength has been a topic about the Internet lately. I have seen lots of clever methods for generating and remembering strong passwords. Some are better than others, but in my opinion, none are adequate. Here's the problem: It doesn't matter how strong your passwords are if you use the same one on multiple sites. All it takes is for a site to get hacked(侵入), like Gawker media, or even Sony did, and now your superstrong password has been stolen, and every site on which you used that password has been accessed.
So, the bottom line is that no matter how strong your passwords are, and no matter what clever tricks you use to help you remember them, if you surf internet often, the only truly secure password system is what you need.
Enter LastPass. It's not the only password manager out there, but I like it the best. You create ONE strong password that you have to memorize and use it to access your LastPass database. The LastPass database is stored online, on LastPass's servers. LastPass recognizes the site you're on and automatically logs you in (after, optionally, asking you to reenter your master password). LastPass also has automatic form fill and automatic password generation. This means that you can have a different, unique, very strong password for every site you log into, but you only have to remember one master password. It's the best of both worlds.
One argument against LastPass is that if their database is attacked, then all of your sites are in danger, and that's true, but given that their entire line of work is keeping that information safe, I'm willing to take that chance. The alternative is rolling dice(擲骰子) or picking phrases to create passwords, writing all of them down on a piece of paper or something, and then having to manually type them in when I go to a site. A terrible mess.
There is a free version of LastPass, with some additional features unlocked if you pay a $12 a year subscription.
Joshua Bardwell
【小題1】The writer thinks using the same password everywhere is ________.
| A．dangerous | B．convenient |
| C．appropriate | D．adequate |
| A．all passwords used |
| B．the last password |
| C．unique password each time |
| D．the master password only |
| A．they have better ways to create password |
| B．they think rolling dice is more convenient |
| C．they have no faith in Lastpass database's safety |
| D．Gawker media and Lastpass were hacked once |
| A．share his experience |
| B．introduce a product of good quality |
| C．advertise his product |
| D．teach how to use a new product |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
No one wants to be tested. We would all like to get a driver’s license without answering questionsabout rights of way or showing that we can parallel park a car. Many future lawyers and doctors probablywish they could join their profession without taking an exam.
But tests and standards are a necessary fact of life. They protect us from unskilled drivers, harmful products and dishonest professionals. In schools too exams play a. constructive role. They tell public officials whether new school programs are making a difference and where new investments are likely to pay off.
They tell teachers what their students have learned--and have not. They tell parents how their children are doing compared with others their age. They encourage students to make more effort.
It is important to recall that for most of century, educators used intelligence tests to decide whichchildren should get a high-quality education. The point of IQ testing was to find out how much children were capable of learning rather than to test what they had actually learned. Based on IQ scores, millions of children
were assigned to dumbed-down programs instead of solid courses in science, math, history, literature andforeign language.
This history reminds us that tests should be used to improve education. Every child should have access to a high-quality education. Students should have full opportunity to learn what will be tested; otherwise theirscores will merely reflect whether they come from an educated family.
In the past few years, we have seen the enormous benefits that flow to disadvantaged students because of the information provided by state tests. Those who fall behind are now getting extra instruction inafter-school classes and summer programs. In their efforts to improve student performance, states are
increasing teachers salaries, testing new teachers and insisting on better teacher education.
Performance in education means the mastery of both knowledge and skills. This is why it is reasonable totest teachers to make sure they know their subject matter, as well as how to teach it to young children. And this is why it is reasonable to assess whether students are ready to advance to the next grade or graduate
from high school.
【小題1】According to the passage, school exams enable ______.
| A．governments to make right policieshave made efforts |
| B．students to meet their teachers' requirements |
| C．teachers to understand if their students |
| D．parents to compare their kids' behavior across schools |
| A．lead to high-quality education |
| B．are less academically challenging |
| C．are intended for intelligent students |
| D．enable children to make steady progress |
| A．Disadvantaged students can benefit from state tests. |
| B．Tests should focus on what students have actually learned. |
| C．Intelligent tests decide if children should get a high - quality education. |
| D．Intelligent tests are helpful in separating excellent students from poor ones. |
| A．To re-assess the value of IQ testing. |
| B．To defend the role of testing in education. |
| C．To explain what high-quality education means. |
| D．To call for thorough and complete reform in education. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Want to travel as cheaply as possible while enjoying the great scenery as much as you like?
Backpacking is the way. As the most popular traveling choice among young western people, backpacking allows you to travel at your own free will. Carrying a tent, sleeping bag and clothes, backpackers also need to pack an attitude that will help them deal with many mental and physical challenges.
It is a thrill to put our ability to test and challenge ourselves with sorts of difficulties we might come across. So, backpacking is something young people can hardly deny.
Young people in Europe often travel around by train. Now, with plane tickets dropping in price, more are traveling to distant countries, such as Australia and China. And some just travel within their own countries.
But no matter where a backpacker travels, planning in advance is important if he or she wants to enjoy the trip.
Clothing
In summer, light, waterproof clothes are best. Backpackers must remember to travel lightly and not pack too many clothes.
Medicine
There are many medicines, especially for summer, such as those for sunstroke, snake bites and mosquitoes. Others are useful in every season, such as those for common colds, poisoning and diarrhea.
Cards
Three types of cards are of great value for backpacks: student Identity Card, personal ID and a credit card.
A student ID card can be helpful for saving money. It often gets train tickets and entrance tickets for cheaper prices in many Western countries.
Personal ID card can, not only get you out of trouble with local police, but also prove useful in all sorts of other situations.
Carrying a credit card can be a safe way of carrying money, as cash can easily get lost, stolen or wet.
And of course, don’t forget to enjoy your trip!
【小題1】What does the underlined sentence mean?
| A．Backpackers also need to be in high spirits when they want to travel. |
| B．Backpackers may also face dangerous situations. |
| C．Backpackers also need to talk with doctors about their traveling. |
| D．Backpackers need to make preparation for many kinds of difficulty in advance. |
| A．Easy to wash. | B．Not letting water go through. | C．Washed without water. | D．Used in water. |
| A．your student ID | B．your credit card | C．your personal ID | D．your passport |
| A．They can travel very easily. |
| B．They won’t worry about where to live. |
| C．They can have the chance to take some adventures. |
| D．They can take some physical exercise. |
| A．To give some ideas about traveling. |
| B．To encourage the young to travel. |
| C．To tell people how to avoid something unpleasant. |
| D．To offer some useful advice for traveling. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Can software bring dead tongues back to life? Probably yes.
A computer algorithm（計算程序）works almost as well as a trained linguist（語言學家） in reconstructing how dead "protolanguages" would have sounded, says a new study.
"Our computer system is doing a basic job right now," says Alex Bouchard-Côté, an assistant professor in the department of statistics at the University of British Columbia and lead author of the paper describing the algorithm. But the program does a good enough job that it may be able to give linguists a head start, the statistician added.
For centuries, scholars have reconstructed languages by hand: looking at the same word in two or more languages and making educated guesses about what that word's "ancestor" may have sounded like. For example, the Spanish word for man （"hombre"） and the French word for man （"homme"） developed from the Latin word "homo." The way linguists compare words from descendant（后代）languages to reconstruct the parent language is called, appropriately, the comparative method.
The early 19th-century linguist Franz Bopp was the first to compare Greek, Latin and Sanskrit using this method. Jacob Grimm, one of the Brothers Grimm of fairy tale fame, used the comparative method to show how Germanic languages developed from a common ancestor.
The difference between that and Bouchard-Côté's program, the statistician says, "is we do it on a larger scale." As a proof of concept, Bouchard-Côté fed words from 637 Austronesian languages （spoken in Indonesia, the Philippines, Malaysia and more） into the new algorithm, and the system came up with a list of what the ancestor words of all those languages would have sounded like. In more than 85 percent of cases, the automated reconstruction came within one character of the ancestor word commonly accepted as true by linguists.
The algorithm won't replace trained human linguists, but could speed up language analysis.
Using a computer to do large-scale reconstruction offers another advantage. Bouchard-Côté says, “With big data sets, you can really start finding regularities … You might find that certain sounds are more likely to change than others."
So Bouchard-Côté's team tested the "functional load hypothesis（假設）," which says that sounds that are more important for two clearly different words are less likely to change over time. A formal test of this hypothesis in 1967 looked at four languages; Bouchard-Côté's algorithm looked at 637.
"The revealed pattern would not be obvious if we had not been able to reconstruct large numbers of protolanguages," Bouchard-Côté and his coauthors write in the new study.
In addition to simply helping linguists understand how people spoke in the past, studying ancient languages can perhaps answer historical questions. For example, Bouchard-Côté says, "Say people are interested in finding out when Europe was settled. If you can figure out if the language of the settling population had a word for wheel, then you can get some idea of the order in which things occurred, because you would have some records that show you when the wheel was invented.”
【小題1】The underline word “protolanguages” in the first paragraph probably refers to __________.
| A．the languages that couldn’t be reconstructed by hand |
| B．parent languages that existed in the past |
| C．languages developed from a common ancestor |
| D．languages used to explain things that occurred in the past |
| A．is commonly accepted as false |
| B．dates back to the 19th century |
| C．focuses on European languages |
| D．is conducted using the comparative method |
| A．arouse people’s interest in when Europe was settled |
| B．allow us to find answers to some historical questions |
| C．enable us to picture the way linguists communicated |
| D．help figure out how the wheel was invented |
| A．will bring every dead language back to life |
| B．can take the place of linguists in language analysis |
| C．is of great help to promote language analysis with big data sets |
| D．can merely reconstruct Asian-Pacific “protolanguages” |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Using too much water or throwing rubbish into our rivers are clear ways that humans can put our water supply in danger, but we also affect our water supply in less obvious ways. You may wonder how paving(鋪砌) a road can lead to less usable fresh water. A major part of the water we use every day is groundwater. Groundwater does not come from lakes or rivers. It comes from underground. The more roads and parking lots we pave, the less water can flow into the ground to become groundwater.
Human activity is not responsible for all water shortages(短缺). Drier climates are of course more likely to have droughts(干旱) than areas with more rainfall, but in any case, good management can help to make sure there is enough water to meet our basic needs.
Thinking about the way we use water every day can make a big difference, too. In the United States, a family of four can use 1.5tons of water a day! This shows how much we depend on water to live, but there's a lot we can do to lower the number.
You can take steps to save water in your home. To start with, use the same glass for your drinking water all day. Wash it only once a day. Run your dishwasher only when it is full. Help your parents fix any leaks (泄露、漏洞)in your home. You can even help to keep our water supply clean by recycling batteries instead of throwing them away.
【小題1】Which of the following is most likely to lead to less groundwater?
| A．Using river water. | B．Throwing batteries away. |
| C．paving parking lots. | D．Throwing rubbish into lakes. |
| A．water on the ground | B．water from a well(井) |
| C．water from the deep earth | D．water from lakes or rivers |
| A．All water shortages are because of human behavior. |
| B．It takes a lot of efforts to meet our water needs. |
| C．There is much we can do to reduce family size. |
| D．The average family in America makes proper use of water. |
| A．show us how to fix leaks at home |
| B．tell us how to run a dishwasher |
| C．prove what drinking glass is best for us |
| D．suggest what we do to save water at home |
| A．why paving roads reduces our water. |
| B．how much we depend on water to live. |
| C．why droughts occur more in dry climates. |
| D．how human activity affects our water supply. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Many of our favorite travel destinations are in danger of being changed badly by increased temperatures and rising seas. The following are some of the places that may be in danger and some that are already experiencing the effects of global warming.
The Everglades, Florida: Perhaps no region of the country is as unprotected to climate change as Florida. Even a slight increase in temperature and water level could devastate popular destinations like the Everglades, Miami Beach and the Keys.
Australia’s Great Barrier Reef: One of the most impressive natural habitats in the world, the Great Barrier Reef could be killed by increased water temperatures and the resulting coral bleaching (漂白法). Australia is particularly easily damaged by global warming because of its large number of fragile (脆弱的) ecosystems, uncertain water sources and a large group of people gathering on the coast.
Dalian, China: Fast-growing China, shown here during a heat wave last year, is opening about one coal factory every day this year. Along with the U.S., China is one of the world's leading contributors to the greenhouse gases , which can lead to the increase in the Earth's temperature.
Venice, Italy: No stranger to flooding, Venice has invested $4.5 billion in a floodgate system that is due to open in 2012. But the frequent changing ocean levels have made people question the floodgates' ability to hold out the rising waters.
London, England: Designed to protect London from storms and extremely high tides, the Thames Barrier was opened in 1984. Some analysts fear that rising oceans will create conditions beyond the capabilities the barrier was designed to meet.
【小題1】The word “devastate” in paragraph 2 means “_____________”.
| A．protect | B．destroy | C．swallow | D．enlarge |
| A．Fragile ecosystem |
| B．Uncertain water sources. |
| C．The large group of people. |
| D．Increased water temperatures and the coral bleaching |
| A．flooding is common in Venice |
| B．everyone is familiar with flooding |
| C．it is strange for Venice to experience flooding |
| D．there is no flooding in Venice |
| A．the dangerous destinations |
| B．the most popular destinations |
| C．the fascinating destinations |
| D．the endangered destinations |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
The color red often means danger --- and by paying attention, accidents can be prevented. At railroad crossings, flashing red fights warn cars to stay back. A red light at a traffic crossing tells cars to stop, so they don't run into other cars.
In the future, the color red also may help prevent danger at construction sites. Thanks to new work by engineers, bridge supports --- or other kinds of materials --- could one day contain a color-changing material. It will turn red before a structure collapses(倒塌) or falls apart.
The secret behind the color-changing material is a particular type of molecule(分子). Molecules come in all shapes and sizes, and make up everything you can see, touch or feel. How a molecule behaves depends on what kinds of atoms(原子) it contains, and how they're held together.
To get a rough picture of one way atoms are held together in a molecule, imagine you and your friends standing in a large circle, holding hands. Each person represents one atom, your clasped hands represent the bond, and the entire circle represents a molecule.
The molecule being used to turn the material red is called mechanophore(機械響應性聚合物). When one chemical bond in the mechanophore molecule breaks, the rest of the molecule turns red.
There is a way to get rid of~ the red color: light. When a bright light is shone on the mechanophore, the broken bond is fixed and the red color disappears. This "self-healing" may be a problem for engineers who want to use the color-changer in big construction projects that will be outside, in the sunlight. And if bright light keeps the red color from appearing, then the mechanophore's warning system will be useless.
Scientists still have a lot of work to do before the color-changing molecules can be used outside the lab. If mechanophore can be used in the real world, they are suggested to be employed in a new kind of paint.
【小題1】The first paragraph mainly tells us __________.
| A．the color red is widely used in our life |
| B．how to prevent car accidents |
| C．the color is an important signal of warning |
| D．how to use color red |
| A．tell different materials used in the building |
| B．warn people that the building is dangerous |
| C．make the building more beautiful |
| D．tell people the building is under construction |
| A．the way atoms are held together in a molecule |
| B．how a molecule behaves in an object |
| C．how to play an old game |
| D．how people get along with each other |
| A．Paints | B．Water | C．Poor building materials | D．The bright light |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Many people think of the brain as a mystery.They don't know much about intelligence and how it works.When they do think about what intelligence is，many people believe that a person is born smart，average，or dumb—and stays that way in the whole life.But new research shows that the brain is more like a muscle—it changes and gets stronger when you use it.And scientists have been able to show just how the brain grows and gets stronger when you learn.
Everyone knows that when you lift weights，your muscles get bigger and you get stronger.A person who can't lift 20 pounds when he/she starts exercising can get strong enough to lift 100 pounds after working out for a long time.That's because the muscles become larger and stronger with exercise.And when you stop exercising，the muscles shrink and you get weaker.That's why people say “Use it or lose it！”
But most people don't know that when they practice and learn new things，parts of their brain change and get larger a lot like muscles do when they exercise. Inside the cortex(皮層)of the brain are billions of tiny nerve cells，called neurons. The nerve cells have branches connecting them to other cells in a complicated network. Communication between these brain cells is what allows us to think and solve problems. When you learn new things，these tiny connections in the brain actually multiply and get stronger.The more you challenge your mind to learn，the more your brain cells grow.Then，things that you once found very hard or even impossible to do—like speaking a foreign language or doing algebra(代數(shù))—seem to become easy after learning them for a period of time.The result is a stronger，smarter brain.
Scientists started thinking that the human brain could develop and change when they studied animals'brains.They found out that animals that lived in a challenging environment were more perspicacious—they were better at solving problems and learning new things.
【小題1】According to the first paragraph，________.
| A．the function of our brain is like that of the muscle |
| B．until now it's impossible to explain the brain's mystery |
| C．many people believe one's intelligence is naturally determined |
| D．one's brain grows stronger as the age increases |
| A．using the brain |
| B．connecting things in your brain |
| C．lifting weights |
| D．doing research about the brain |
| A．Strong. | B．Smart. |
| C．Popular. | D．Active. |
| A．the differences between animals'brains and humans'brains |
| B．the relation between human brains and muscles |
| C．scientists' findings about animals' brains |
| D．how to make your brain smarter through self?development |
查看答案和解析>>
湖北省互聯(lián)網違法和不良信息舉報平臺 | 網上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權舉報專區(qū)
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com