The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid---we simply weigh too much, and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.
However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicus basilicus, a lizard (蜥蜴)native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water’s surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we,d need huge feet that we could bring up to our ears in order to create adequate w hitting. ’’
But fortunately there is an alternative : cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “non-Newtonian” liquid that doesn’t behave like normal water. Now, if the surface of the water is hit hard enough, particles(粒子)in the water group together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of an adequately thick Liquid of cornflour.
Fun though all this may sound, it’s still rather messy and better read about in theory than carried out in practice. If you must do it, then keep the water wings handy in case you start to sink--and take a shower afterward!
1.Walking on water hasn’t become a reality mainly because humans______.
A. are not interested in it
B. have biological limitations
C. have not invented proper tools
D. are afraid to make an attempt
2.What do we know about Basilicus basilicus from the passage?
A. It is light enough to walk on water.
B. Its huge feet enable it to stay above water.
C. It can run across water at a certain speed.
D. Its unique skin keeps it from getting wet in water.
3.What is the function of the cornflour according to the passage?
A. To create a thick liquid.
B. To turn the water into solid.
C. To help the liquid behave normally.
D. To enable the water to move rapidly.
4.What is the author’s attitude toward the idea of humans’ walking on water?
A. It is risky but beneficial.
B. It is interesting and worth trying.
C. It is crazy and cannot become a reality.
D. It is impractical though theoretically possible.
科目:高中英语 来源:陕西省2016-2017学年高一(重点班)下学期第三学月考英语试卷 题型:单项填空
Having retired(退休),he________the club for old men and plays chess every day there.
A. takes part in B. joins in
C. attends D. joins
查看答案和解析>>
科目:高中英语 来源:浙江省金华市2016-2017学年高一6月月考英语试卷 题型:七选五
Home on the way
People need homes: children regard their parents' place as home; boarders call school "home" on weekdays; married couples work together to build new homes; and travelers … have no place to call "home", at least for a few nights.1.. Don’t they have the right to a home? Of course they do.
Some regular travelers take their own belongings: like bed sheets, pillowcases and family photos to make them feel like home no matter where they are; some stay for long periods in the same hotel and as a result become very familiar with service and attendants;2.. Furthermore, driving a camping car during one’s travels and sleeping in the vehicle at night is just like home -- only mobile!
And how about keeping relationships while in transit?3.; some send letters and postcards, or even photos; others may just call and say “hi”, just to let their friends know that they're still alive and well. People find ways to keep in touch. Making friends on the way helps travelers feel more or less at home.4..
Nowadays, fewer people are working in their local towns, so how do they develop a sense of belonging? Whenever we step out of our local boundaries, there is always another “home” waiting to be found.5., we can make the place we stay “home”.
A. Hotels provide a clean safe place to stay while you are travelling the world[
B. others may simply put some flowers by the hotel window to make things more homely
C. Backpackers in youth hostels may become very good friends, even closer than siblings(手足)
D. So how about people who have to travel for quite a long time
E. No matter where you go to in the world, hotels are there, too
F. Some keep contact with their friends by means of Internet
G. Wherever we are, with just a little bit of effort and imagination
查看答案和解析>>
科目:高中英语 来源:黑龙江省2016-2017学年高二下学期期中考试英语试卷 题型:阅读理解
Are you having difficulty falling asleep? Try drinking a glass of warm milk. If that doesn’t work, listen to some soft, beautiful music. Still no luck? Try think about sheep jumping over a fence. If you are still awake, take a sleeping pill. People who take pills often become dependent on the drugs. So you lie awake knowing that the new workday will soon arrive. If you have been in such condition for at least one month, you may have primary insomnia(失眠症).
A new study has found that you might fall asleep more quickly and stay asleep longer if you try “cerebral hypothermia.” It is not a complex medical process. It just means cooling down your brain. Eric Nofzinger and Naniel Buysse from the University of Pittsburgh Medical School led the study. They examined twelve people who had sleeping problems. Twelve others had no sleeping problems. Each of them wore a soft plastic cap on their head at bedtime.
The caps had tubes inside filled with water. The researchers moved the water through the tubes and then changed the temperature of the water. Other studies showed that people who had sleeping problems often had more chemical reactions in the front of their brain. The researchers thought cooling down the brain might help.
On the first two nights of testing, the patients wore caps with no water. On the next two nights, the caps were worn, but the water was not cooled. Then the researchers cooled the water a little for another two nights. On the final two nights of the study, the temperature of the water was made much cooler. The researchers found that the water caps didn’ t help the patients until the temperature was about 14℃. Most of the patients fell asleep faster and slept better when the coolest water was moving around their head.
Dr Nfzinger and Dr. Buysse noted that this was only the beginning of the brain temperature study. But they believed they had discovered something important that needed more research.
1.The first paragraph is written to _________.
A. put forward the topic of the passage.
B. explain how serious insomnia is
C. tell us the causes of sleeping problems.
D. tell us the danger of having sleeping problems.
2.From the passage we know that “cerebral hypothermia” is actually _________.
A. a complex medical process.
B. a psychological treatment.
C. a simple physical treatment.
D. a difficult scientific theory.
3.In the study, researchers helped people fall asleep faster through _________.
A. increasing chemical reactions in the front of their brain.
B. making them feel safe with a cap on their head
C. asking them to drink water to cool down
D. lowering the temperature of their brain
4.What is paragraph 4 mainly about?
A. The cause of the study.
B. The function of the caps.
C. People’s reactions to the study.
D. Some details of the study.
查看答案和解析>>
科目:高中英语 来源:河北省2017届高三上学期第14周周测英语试卷 题型:完成句子
Hangzhou in Zhejiang province got a lot of attention last month. The host city of the G20 Leaders Summit1.(welcome) heads of the world’s 20 major economies and international organizations on Sept. 4-5.
For two days, they discussed global topics and enjoyed2.(show). But for young people around the world, the G20 Summit had more to offer. More than 4,000 students from China and abroad took part in 3.(volunteer) service during the summit. An impressive 15 local universities and colleges gave the event many of4.(it) students volunteers. Students with language skills5.(prefer).
6.(choose) as a volunteer for the summit, they had to through several rounds of interviews and receive training. In addition, international students were happy to help.7.total of 26 international students served as volunteers. Australia Tim, 8.is studying medicine in China said he was honored that West Lake district government had invited him to take part in the making of a TV program that taught English to people9.(live)in Hangzhou. In the program, he showed popular places for morning exercise ,how to bargain at the market and how to make dumplings. He thought it was interesting to tell stories about Hangzhou 10.a foreigner’s point of view so that more people fall in love with Hangzhou.
查看答案和解析>>
科目:高中英语 来源:贵州省2016-2017学年高二下学期第三次月考英语试卷 题型:短文填空
Dear Chris,
I’m sorry to hear that you 1.(be) in hospital for several days. 2.(actual), it’s very easy for a person like you to get sick, 3. you aren’t used to the new environment. 4.(bad) still, you don’t take enough exercise. Here are some tips for you:
First of all, it’s 5. good idea to take part in some social activities, 6.will help you learn more about the local customs and cultures. 7. addition, I suggest you 8.(try) to reduce the pressure of work by listening to music and making friends. Last but not least, you’d better exercise more instead of sitting 9.(make) your body healthier.
I hope my 10.(suggest) will help you lead a healthy lifestyle and you will recover soon.
查看答案和解析>>
科目:高中英语 来源:河南省洛阳市2016-2017学年高二下学期期末质量检测(6月)英语试卷 题型:书面表达
假如你是李华,刚从外国度假回来,你对度假期间的宾馆很不满意,宾馆房间小,有时没有热水,网络连接慢,食物不新鲜。请给该宾馆负责人写封信,说明情况,并要求赔偿。
注意:1.词数100 左右;2.可适当增加细节,以使行文流畅。
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________
查看答案和解析>>
科目:高中英语 来源:河南省林州市2016-2017学年高一(普通班)5月调研考试英语试卷 题型:阅读理解
Word of the Day Writing Competition
Days are getting colder, and everyone is slowly backing to the warm comfort of their homes. It’s the best opportunity to make good use of the quietness and peace of the season by taking pen and paper(or a computer) out to write.
OxfordWords of Oxford University Press(OUP) is calling all aspiring(有抱负的) authors out there to take part in our writing competition. What we’re looking for are imaginative(富有想象力的) short stories—not more than 500 words---that include every Word of the Day (WOTD) from November.
Each entry will be carefully considered by the OxfordWords team before deciding on a winner. The best storyteller will be given a year’s fee to OxfordDictionaries.com, as well as £50 worth of OUP books, and have his or her piece published on that website.
Before you get started, please make sure you’re read our terms and conditions. Entries can be submitted(递交) through the entry form, or posted into the comment section. Closing date for the competition is 5th January 2015.
And finally, for inspiration, have a look at the charming short story that gives us the idea for this competition, written by a fellow Oxford Dictionaries team member, and including all thirty one Words of the Day from October.
Find out more about our Word of the Day service and sign up to receive the words via email, or on Facebook, Google, and Twitter.
1.What type of writing is this test?
A. An exhibition guide.
B. An art show review.
C. An announcement.
D. An official report.
2.The stories for the competition must______.
A. be about OxfordWords
B. have more than 500 words
C. contain all the words of WOTD
D. be handed in before 5th January 2015
3.The winner of the competition can______________.
A. read all the books of OUP free of charge
B. use OxfordDictionaries.com for free for a year
C. be allowed to be on the OxfordWords team
D. publish all of his or her works on OxfordDictionaries.com
查看答案和解析>>
科目:高中英语 来源:“超级全能生”浙江省2017届高三3月联考英语试卷(有答案) 题型:阅读理解
Ashley C.Ford, a New York City writer, recently appealed to her 66 000 Twitter followers. “A cool thing you can do today is to try to find out which of your local schools have kids with overdue(过期未付的)lunch accounts and pay them off.”
Children from the poorest families get free or reduced-price breakfast and lunch. But some struggle to pay even reduced prices. Some of the IOUs(借据)come from kids who simply forget their lunch money or parents who can afford to pay but neglect to keep prepaid accounts up to date.
People around the country have been inspired by Ashley C. Ford to donate money to pay off debts owed by parents that can follow kids throughout their school careers.
“It really hit home for me,” said Kristina Arwood, who launched a campaign that raised $20,000 to pay lunch debts in her region. “I grew up on free and reduced-price lunches, but even that 40 cents was hard to get together with four kids. There were times I wouldn't eat because I didn't have money.”
The effort drew some criticism from people who said some of the money is owed by parents who can afford the $2.50 for lunch but let their accounts run into the red. But the response has been mostly positive.
“It's unrealistic to think donations are going to fix this problem for all school districts,” said Diane Pratt-Heavner, spokeswoman for the association.
Ford said her real aim was to inspire a bigger wave of community giving. She said, “It was just one idea; another school might need help with uniforms or tutoring. The point was to do something that helps people in your community.”
1.Kids with overdue lunch accounts may be those ________.
A. who refuse to bring their lunch money to school
B. whose parents are unwilling to pay the accounts in advance
C. whose family fail to pay for their meals even at reduced prices
D. who would have the debts follow them throughout their school years
2.Which of the following statements about the campaign launched by Ashley C.Ford is RIGHT?
A. It could solve the problem of school children failing to pay their meals.
B. It received wide support and criticism from some people as well.
C. It raised enough money to cover the IOUs in all school districts.
D. It also focused on helping kids with their school uniforms.
3.What did Kristina mean by saying "It really hit home for me" in Paragraph 4?
A. She was rather surprised at what the kids experienced.
B. She felt as if she were stricken by the kids' sufferings.
C. She felt touched because of her similar experiences in childhood.
D. Her family were suffering because of her donation to the campaign.
4.What is Ashley C. Ford's real aim to appeal to her Twitter followers to donate to the kids?
A. To ensure that the government get universal free meals for all students.
B. To arouse people's concern about those who need uniforms or tutoring.
C. To raise enough money to pay the lunch debts in all the schools.
D. To encourage more people to take action to help those in need.
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