The splendid aurora light displays that appear in Earth’s atmosphere around the north and south magnetic(磁的) poles were once mysterious phenomena. Now, scientists have data from satellites and ground-based observations from which we know that the aurora brilliance is a massive electrical discharge similar to that occurring in a neon sign.
To understand the cause of auroras, first picture the Earth enclosed by its magnetosphere(磁层), a huge region created by the Earth’s magnetic field. Outside the magnetosphere, rushing toward the earth is the solar wind, a speedily moving body of ionized(离子化的) gases with its own magnetic field. Charged particles(粒子) in this solar wind speed earthward along the solar wind’s magnetic lines of force. The Earth’s magnetosphere is a barrier to the solar winds, and forces the charged particles of the solar wind to flow around the magnetosphere itself. But in the polar regions, the magnetic lines of force of the Earth and of the solar wind gather together. Here many of the solar wind’s charged particles break through the magnetosphere and enter Earth’s magnetic field. They then rush back and forth between the Earth’s magnetic poles very rapidly and ionize and excite the atoms of the upper atmosphere of the Earth, causing them to produce aurora radiations of visible light.
The colors of an aurora depend on the atoms producing them. The leading greenish-white light comes from low energy excitation of oxygen atoms. During huge magnetic storms oxygen atoms also undergo high energy excitation and produce pink light. Excited nitrogen(氮) atoms contribute bands of color varying from blue to violet. Viewed from outer space, auroras can be seen as dimly shining belts wrapped around each of the Earth’s magnetic poles. Each aurora hangs like a curtain of light stretching over the polar regions and into the higher latitudes. When the solar flares(闪光) that result in magnetic storms and aurora activity are very strong, aurora displays may extend as far as the southern regions of the United States.
1.What is it that directly gives off aurora light?
A. The Earth’s magnetic field.
B. The solar wind’s magnetic field.
C. The Earth’s ionized particles.
D. The solar wind’s charged particles.
2.What does the third paragraph mainly discuss?
A. The appearance of auroras around the Earth’s poles.
B. The periodic change in the display of auroras.
C. The factors that cause the variety of colors in auroras.
D. The covering area of auroras based on their colors.
3.What can we infer from the passage?
A. The magnetosphere increases the speed of particles from the solar wind.
B. The color of greenish-white appears least frequently in an aurora display.
C. Earth’s magnetic field contributes to the variety and difference of aurora’s colors.
D. The strength of the solar flares has a positive effect on the extending distance of aurora.
When I talked to some businessmen earlier today, one fellow asked me, “Would you give money to a homeless person, even when you know he’s going to use it to buy alcohol?” I replied, “If all I was giving was money, it’ll be one thing. But for me, whenever I do give money, that’s just the wrapping (包装纸) . The real gift is hidden inside—it’s love. And I haven’t ever found any reason to limit gifts of love.”
By the end of the night, I decided to get some pizza. In front of me in line was a homeless-looking man. He was counting the few dollars bills in his hand, over and over again, until it was his turn to order. Just then, he told the young woman behind the counter, “I’ll have the full cheese pizza.” “Full?” she asked. “It’s really big,” she added, although what she really meant to say was that it’d be too expensive for him. “Yeah, the full” “$18.65,” she submitted. The bills he was counting weren’t going to make it. I wasn’t intending to get the whole pizza for him. But thinking back to my conversation with the business man, I realized that money was really just the wrapping.
I made my move. “Can you charge that pizza with my order” I said to the cashier. “Really?” the homeless-looking man said. “Really?” the young woman behind the counter repeated. “Yes, really.” That confused man and I had a sweet silent moment. To his silent question of why I was doing it, I added, “Just pay it forward for someone else.” And he said, “Well, you know what? I was actually treating these five homeless guys out there.” He was actually paying it forward, in the first place. What an unexpected fortune to get a chance to be a part of a man’s act of kindness.
1.What can we learn about the author from the first paragraph?
A. He believes it’s not money but love that matters.
B. He is mean with his money.
C. He cares little about money.
D. He seldom gives money to the poor.
2.What made the author decide to help the man?
A. The request from the homeless-looking man.
B. His sympathy for the homeless-looking man.
C. His recalling the talk with the businessman earlier that day.
D. The urgency from the young woman behind the counter.
3.Why did the homeless-looking man want to buy the whole pizza?
A. Because he was too hungry.
B. Because he wanted to pay it forward.
C. Because he wanted to treat his own five children.
D. Because he wanted to help some homeless people.
4.What is the best title for the passage?
A. Paying it forward B. Helping a homeless man
C. A talk with a businessman D. Money was just the wrapping
In a shocking upset, 70-year-old Republican candidate Donald Trump rode a wave to victory as voters elected him the 45th President of the United States.
Actually, a lot of experts had predicted that Democratic candidate Hillary Clinton would come out on top. Throughout the campaign, one of Trump's main challenges was to persuade voters that he has the attitude, knowledge and judgment to be president. In the end, he was able to attract more than enough voters to his side.
Hillary Clinton admitted the election to Trump in a phone call at around 2:30 am. "Hillary has worked very long and very hard over a long period of time," Trump told his supporters during his victory speech. "We owe her a major debt of gratitude for her service to our country. "
Hillary Clinton delivered her speech later in the day. "We must accept this result and then look to the future," she told her disappointed supporters. "Donald Trump is going to be our president. We owe him an open mind and the chance to lead. "
Trump's rise to the presidency comes after a long career as a real-estate developer. He built skyscrapers, resorts and golf courses. He also risked other businesses, introducing Trump Steaks, Trump Natural Spring Water, and an airline called Trump Shuttle. In 2004, he became a TV star with the reality show The Apprentice.
Now Trump and his team will have to face many difficult things. They'll have to work to bring the country together after a divisive campaign that upset millions of Americans. Throughout the country, millions of Americans are out of work and struggling to make ends meet. The new president must also address international issues. They include the war on terrorism and the refugee crisis. Still, Trump says he sees a bright future ahead. "Every single American will have the opportunity to realize his or her fullest potential," he told his supporters.
1.What should many experts think of Trump's victory?
A. It is expected. B. It is satisfying.
C. It is annoying. D. It is surprising.
2.How old was Donald Trump when he became a TV star?
A. 50 years old. B. 54 years old.
C. 58 years old. D. 62 years old.
3.What can be learned about Donald Trump from the passage?
A. He is a successful businessman.
B. He has been serving in government.
C. He thought badly of Hillary Clinton.
D. He is worried about America.
4.What is the last paragraph mainly about?
A. The problems with America.
B. The challenges Trump will face.
C. Trump's ideas about his future work.
D. The decisions Trump will have to make.
Amazing Scientific Breakthrough
Helps You Lose Weight without Starvation Diets or Tiring Exercise
Have You Ever Wished…
There was a fast easy and reliable way to safely drop weight by magically suppressing your food desires? An easy way to use product that magically melts off ugly fat without “dieting,” calorie counting, or tiring exercise? What if this breakthrough could also increase your energy levels and brightened your mood throughout the day?
Introducing…The Amazing Diet Patch
The all new Amazing Diet Patch(as seen on TV) is a revolutionary new weight loss system that makes you lose 3 to 7 pounds wee after week! Until you fit into the clothes you’ve always dreamed of! This is the fastest most effective and safe way to lose weight. Without starvation diets or strenuous exercise!
How Does It Work?
The secret is a material called Fucus Vesiculosus that suppresses your food desires, and increases your metabolism turning your body into a fat burning machine.
Just listen to what others are saying about it:
After the birth of my child I started gaining weight quickly and nothing would make me lose weight. At first I wondered if the diet patch really worked? But I decided to try the free sample, and after the first seven days I lost 7-Lbs. I couldn’t feel better about myself. —Sherry Parker
I could not believe how easy it was to use the Amazing Diet Patch! I’ve tried using pills, but I would always forget to take pills before my meals. Now with the patch I just put it on in the morning and forget about it. —Jeff Robins
Not Available In Stores
But you can get it right here directly from us through this special online offer. And we’re willing to absorb 100% of the risk by giving you a 1-Week Free Trial!
1.According to the passage, we know that the Amazing Diet Patch is some kind of _______.
A. pills B. soup C. vegetables D. plaster (膏)
2.Which of the following words can replace the underlined word “suppressing”?
A. increasing B. changing C. controlling D. burning
3.The Amazing Diet patch is available only _______.
A. on the TV B. through the online
C. in the drug store D. in the supermarket
4.The purpose of the Amazing Diet Patch is to lose your weight by ______.
A. change your metabolism
B. doing large amount of exercises
C. brightening your mood
D. increasing your diet
假定你是李华，最近收到了你的英国朋友Jacob的来信，得知他已经考上了一所名牌大学。请你写信向他表示祝贺，并就你在大学专业选择上遇到的困惑征求他的意见。信的内容包括：
1.向 Jacob 表示祝贺；
2.谈谈你在大学专业选择上的困惑；
3.向对方征求意见和建议。
注意：1.词数 100 左右；
2.可以适当增加细节，以使行文连贯。
假定英语课上老师要求同桌之间交换修改作文，下文就是你同桌的一篇作文。文中共有10处语言错误，每句最多有两处。每处错误仅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（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（＼）划掉。
修改：在错的词下划一横线，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。
Now I’d like to share with you a strange experience I had a month before.It may sound funny,and it’s true.After a day’s hard work I went to bed early than usual.It was about two o’clock in the morning,and suddenly I woke up.I heard a noise.I got out of bed and went slow downstairs.I listened carefully.I could heard two men speaking quietly.I believed two thieves had broken into my house and I was really frightened,so I went back to upstairs,and immediately phone the police from my bedroom.The police arrived quickly.They opened front door with a special key and went into the living room.You can imagine what embarrassed I was when they came upstairs and told me we had turned the television off for me and everything was all right.
