The next time someone asks you where the biggest ocean is, point them toward Jupiter. While earth harbours about 320 million cubic milesof water, our planet is practically a desert compared to the res 题目和参考答案——青夏教育精英家教网—

题目内容

The next time someone asks you where the biggest ocean is, point them toward Jupiter. While earth harbours about 320 million cubic miles(1,333 cubic km)of water, our planet is practically a desert compared to the rest of the Solar System.

A moon of Jupiter called Europa, for example, which is roughly the size of our own Moon, likely hides a subsurface ocean with more than twice as much water as there is on Earth.

Yet even that pales into insignificance in comparison to Europa's neighbour Ganymede; more than 30 times as much water as our home planet is thought to reside there as liquid and ice.

And scientists keep finding more water wherever they look. On September 28, researchers reported that Dione — a small moon of Saturn — probably has a subsurface ocean, too.

To see just how Earth stacks up against other ocean worlds, Business Insider contacted Steve Vance, a planetary scientist at NASA's Jet Propulsion Laboratory who's calculated the numbers on just how much water might be out there.

In order of how much water they have, from the least to the most, they are: Enceladus, Dione, Earth, Europa, Pluto, Triton, Callisto, Titan, and Ganymede. Mimas, a moon of Saturn, and Ceres, the largest asteroid in the Solar System, are also thought to have subsurface oceans —but scientists aren't yet sure how big each one might be.

1.How many stars are mentioned in this passage?

A. Eleven. B. Twelve.

C. Thirteen. D. Fourteen.

2.What can we know according to the passage?

A. Compared with the Solar System, Jupiter looks as if it is a desert.

B. Ganymede is thought to be covered with more water than Europa.

C. Business Insider is a planetary NASA’s laboratory of Steve Vance.

D. Ceres harbours the largest subsurface ocean in the Solar System.

3.What does the passage mainly tell us?

A. The order of how much water the stars have has been figured out.

B. Scientists keep exploring more water in the universe wherever they look.

C. These ocean worlds reveal just how little water we have on Earth.

D. NASA’s planetary scientists are calculating the water numbers in the sky.

练习册系列答案

相关题目

In London's art gallery six or seven men, mostly in their 30s, are busy painting the walls with new designs in colorful lettering and clever tricks. Tins of spray paint and beer stand on the ground. The atmosphere is not unlike that of a golf course: a mix of concentration and relaxation.

Graffiti(涂鸦) painting is traditionally a daring hobby. Teenagers avoid security guards to put their names on trains and buses. But over the past decade that has almost disappeared from Britain's cities. Between 2007 and 2017 the number of incidents of graffiti recorded by the British Transport Police fell by 63%. A survey by the environment ministry shows that fewer places are damaged by tags(绘名) than ever. Graffiti are increasingly limited to only a few walls. In time the practice may die out entirely.

The most obvious reason for the decline in tagging and train-painting is better policing, says Keegan Webb, who runs The London Vandal, a graffiti blog (博客). Numerous cameras mean it is harder to get away with painting illegally. And punishments are more severe. A generational change is apparent, too. Now teenagers prefer to play with iPads and video games. Those who do get involved tend to prefer street art to graffiti. And the internet helps painters win far more attention by posting pictures online than they can by breaking into a railway yard.

Taggers and graffiti artists mostly grew up in the 1980s and 1990s. Those men are now older and less willing to take risks. "We can't run away from the police any more," says Ben Eine, who turned from tagging to street art. The hip-hop culture that inspired graffiti in the first place has faded. Video games and comic books provide more inspiration than music.

Graffiti may eventually disappear. But for now the hobby is almost respectable. Mr Eine says he has lots of friends who used to paint trains. Now with wives and children, they paint abandoned houses at the weekend. It has become something to do on a Sunday afternoon—a slightly healthier alternative to sitting watching the football.

1.How do the painters feel while painting graffiti according to the first paragraph?

A. Free but stressed. B. Free and focused.

C. Particular and respected. D. Nervous but satisfied.

2.Why is graffiti painting traditionally considered as a daring hobby?

A. It's at the risk of being caught.

B. It takes much hard training.

C. It's dangerous to paint in trains.

D. It needs a great deal of knowledge.

3.hat does the underlined word “decline” in the third paragraph refer to?

A. Ban of government. B. Reduction of graffiti.

C. Disappearance of graffiti. D. Better policing of government.

4.What conclusion can we draw from the fourth paragraph?

A. The early graffiti had something to do with music.

B. Graffiti artists like to be the focuses in public.

C. Graffiti artists regret over what they did in the past.

D. Painting is much healthier than watching football.

假定你是李华，正在一所英国学校学习暑期课程，遇到一些困难，希望得到学校辅导中心(Learning Center)的帮助。根据学校规定，你需书面预约，请按下列要点写一封信：

1．本人简介；

2．求助内容；

3．约定时间；

4．你的联系方式(Email：lihua@1236.com；Phone：12345678)。

____________________________________________________________________________________________

_______________________________________________________________________________

Look forward to your reply.

Yours，

Li Hua

As we all know ,trees are important to our life. They provide us with food, wood and most importantly, oxygen. Now there is one more thing we can add to this list—blocking out harmful bacteria in water.

The discovery was made by some scientists and high school students who were seeking for a natural water filter(过滤器)—one that could help people in developing countries that don’t have access to modern water systems.

The researchers, led by Rohit Karnik, a professor ,decided to turn to trees for help because they were able to allow liquid to flow through while blocking out air bubbles(气泡）.

They began by cutting 1.5-inch-wide sections of tree bark from the branch of a white pine tree. The researchers then tested the wood’s filtering ability by pouring water containing red dye particles(染料颗粒)of different sizes through. To their surprise, they found it was effective in trapping all the particles. Encouraged, the team did another experiment, this time with water containing bacteria. Sure enough, the bark held back 99%of the bacteria, allowing only 1% to flow through.

Mr. Karnik said the bark was able to filter water containing much smaller particles. This means that it can be used to get rid of most of the bacteria. However, what troubles them is that tree bark cannot hold back viruses, which tend to be much smaller.

Though the experiment is successful, we must remember one thing—the bark only works when damp. This means that before this natural filter can be put to practical use, the researchers will have to figure out how to keep the bark damp, or find a way to keep the bark’s great filtering ability even when it’s dry.

But the study is not done. The researchers plan on testing other types of trees, including those flowering trees. They think those may be more effective in trapping smaller particles and even viruses.

1.How will the discovery affect the world?

A. No harmful bacteria will be found in water.

B. There will be no water pollution around the world.

C. More pine trees will be planted around the world.

D. Clean water will be more accessible in developing countries.

2.What problem troubles the researchers when using the trees bark as a water filter?

A. Viruses cannot be prevented.

B. Tree bark should be wet.

C. It’s hard to remove air bubbles.

D. Not all bacteria can be held back.

3.Why does the team plan to do other experiments?

A. To find other natural water filters.

B. To improve the filtering ability of other trees.

C. To find a way to keep the bark wet.

D. To test the filtering ability of other trees.

4.In which column of a newspaper can we read this text?

A. Culture. B. Science.

C. Lifestyle. D. Society.

One night many years ago I was on the bridge of a ship passing one of our large cities on a quiet night. I saw its lights_______in the sky and heard the city’s noises.

I have spent twenty-five years on boats. Now I am a _______. My job is to bring in the large luxury_________and stay with them until they are safely stopped in their ports.

I felt very _______the first time I ever docked a big liner. She came_______up the harbor on a flood tide and towered high over the short little boat. As we drew alongside, a doorway opened_______at water level and two smartly dressed sailors helped me aboard.

I was escorted to the bridge where I _______from the captain. I realized I was in _______of a great ship worth millions of dollars. Having docked several of the large liners, I realized I was not important, _________simply the quarterback who called the signals.

In spite of ________we read in the newspapers, I have great faith in this country, praying that a peaceful understanding will come to this__________world, so that my children can grow up in a world full of happiness. I believe this will come ________.

I remember the understanding and ________ that took over this country, back in 1949, when a little girl named Kathy Fiskus ________into an old well in California. Engineers and sandhogs and people in all walks of life worked almost three days, and when they got her out she was dead.

People sent in thousands of dollars in________funds, but those who did the work and ________the equipment wouldn’t take the money. They worked for bigger things. I talked to captains of foreign ________that came into New York Harbor, and they were just as________as we Americans over the tragedy.

I believe some__________will be found to work together for world peace with the same sympathy and understanding that people worked to rescue little Kathy Fiskus. I believe God will ________bring this about.

1.A. decorated B. reflected C. included D. occupied

2.A. cook B. designer C. pilot D. swimmer

3.A. liners B. shops C. hotels D. offices

4.A. interesting B. smart C. lucky D. proud

5.A. drawing B. riding C. walking D. running

6.A. often B. never C. almost D. hardly

7.A. took over B. picked up C. got out D. brought in

8.A. place B. need C. search D. control

9.A. so B. but C. and D. or

10.A. how B. where C. which D. what

11.A. undiscovered B. unsettled C. unplanned D. unexpected

12.A. in B. from C. about D. on

13.A. favor B. pity C. belief D. sense

14.A. fell B. waved C. threw D. hid

15.A. school B. business C. rescue D. loan

16.A. produced B. transported C. furnished D. supposed

17.A. buses B. planes C. ships D. trains

18.A. worried B. satisfied C. amazed D. concerned

19.A. time B. road C. money D. way

20.A. someday B. forever C. nowhere D. therefore

Organic exercise is a good fit for people looking to train functionally. It is defined as exercise that is similar to the type of physical activity performed by ancient hunter-gatherer ancestors. Organic exercise is generally preformed in natural or outdoor settings. 1.Organic exercise may include such activities as walking, jogging, swimming, hiking or rock climbing.

When it comes to organic exercise, one of its most significant benefits is its limited reliance on equipment. 2.Going for a jog, walking, or even hiking does not require tools, weights, or even hiking does not require tools, weights, or other products, and therefore, is fairly inexpensive.

Since the types of activity emphasized in organic exercise programs are similar to those performed as part of daily life, they do not require extensive or long amounts of practice to obtain proficiency(精通). 3.Therefore the type of activity recommended in an organic workout routine can be performed by beginning or advanced exercisers alike with relative ease.

While the type of exercise recommended in an organic workout may be easy enough to perform, the intensity at which it is recommended can be too much for some individuals. 4.Individuals who are new to exercise or suffer from a chronic health condition that limits their physical ability may find it difficult to perform exercise that is especially strenuous.

5.Individuals who are new to exercise may want to talk with their health care provider before choosing this type of activity. In some cases, it may be better to start off with a more traditional workout and slowly transition to organic exercise than starting with this regimen(养生法)right off the bat.

A. Weigh both the benefits and drawbacks.

B. In fact, it can be done nearly anywhere, any time.

C. Therefore it requires very little helping equipment.

D. Choosing the right types of organic exercise is important.

E. Most adults already know how to hike, swim or dig, for example.

F. In fact, one of the biggest drawbacks is the emphasis on high-intensity exercise.

G. While organic exercise may be a good choice for some, it is right for all adults.

Electric bicycles are now playing 1. important role in the daily life of many students of Yushan No.1 Middle School. 2.fact, they seem to have become a necessary and important part of their school life. By3.(give) them rapid transportation, electric bicycles have freed some students from having accommodation on campus. This, in some way, helps to relieve the school of the 4. (grow) of its dormitories(寝室). For many families, electric bicycles are also very 5. (help). They have made 6. possible for parents to send their children to the school in a relatively shorter time.

7., the use of electric bicycles has also led to some problems. When the teenage students have the use of the bicycles, their parents can’t keep an eye on8.. Some students don’t follow traffics rules at all. There is a 9.(great) danger if a student shows off by speeding or after drinking alcohol. Too many electric bicycles are parked around the campus, 10.affects the traffic and the image of our school as well.

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的同下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

Last winter vacation, my parents and I went back to our hometown, where I spend my childhood. Walking slow in the quiet small town reminded me of the good old day. I went from street to street, in the search of my childhood footprints. Suddenly, I found me at the gate of the primary school on which I studied for six years. As I entered, I was surprised find that the old classroom building was gone. But it was filling with my childhood memories! I felt such sad that tears ran down my cheeks. It was just like the feeling I had while a good friend left me forever.

This house is so big and beautiful. I think the rent must be _________as the other one.

A. three times as more B. three times as much

C. as much three times D. as three times more

试题分类