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, 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 "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(微粒) 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 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.

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2015-2016學(xué)年河北承德市高一上學(xué)期第一次月考英語試卷（解析版） 題型：閱讀理解

I have many new teachers in high school, but Lori Runkle, my English Language and Composition teacher, is my favorite teacher.

Ms. Runkle enjoys getting to know more about students, so I have many chances to talk with her after class. I have always wanted to become a journalist (新聞?dòng)浾?. Since Ms. Runkle used to be a journalist back in the United States, she has introduced many helpful journalistic writing skills to me.

Although she is my teacher, Ms. Runkle and I are more like friends. She often invites my classmates and me to take part in different activities outdoors. For example, I went to listen to a journalist’s speech, which helped me better understand current events (時(shí)事).

Not only does Ms. Runkle talk with me outside of school, she is also a great teacher in the classroom. English Language and Composition is a really hard subject for a second language learner. We felt worried in the beginning, but Ms. Runkle really makes an effort to help us out. In class, Ms. Runkle always encourages students to question everything to keep us active. One part of class I love the most is when groups of students are requested to give speeches on events that are happening in the world. It requires a lot of deep thinking and I really learn quite a lot from it.

I love Ms. Runkle very much. She not only helps me to get good scores, but also acts as a good friend and always gives me advice on life.

1.After class, the author ____________.

A. seldom sees Ms. Runkle

B. talks with Ms. Runkle quite a lot

C. enjoys introducing Ms. Runkle to her friends

D. often invites Ms. Runkle to different activities

2.We can infer (推斷) from the passage that Ms. Runkle is ___________ .

A. friendly and helpful B. kind and humorous

C. clever and active D. strict and boring

3.The author’s favorite part of Ms. Runkle’s class is when Ms. Runkle ___________ .

A. tells them how to get good scores

B. asks them questions about the world

C. asks them to describe current events

D. tells them about events that are happening

4.What is the author’s purpose of writing this passage?

A. To express how much she misses Ms Runkle.

B. To look back on her special high school life.

C. To describe an unforgettable teacher.

D. To show what makes a good teacher.

查看答案和解析>>

科目：高中英語 來源：2016屆浙江三校等高三第一次五校聯(lián)考英語試卷（解析版） 題型：單項(xiàng)填空

It is recently reported that quite a number of applications ________ from Apple’s official APP. Store are not safe to use.

A. downloading B. downloaded

C. having downloaded D. to be downloaded

查看答案和解析>>

科目：高中英語 來源：2016屆山西省四校高三上學(xué)期第二次聯(lián)考英語試卷（解析版） 題型：閱讀理解

A lot of people say math is not their strong suit. One New Jersey parent wants to help change that. Laura Overdeck grew up with numbers. She always helped measure ingredients when her mother baked, and she learned about angles from her father. She went on to major in astrophysics in college. Overdeck knew she wanted her own children to be good at math, too.

“And when our first child was about two, we just started giving her a math problem every night,” Overdeck said. The problem was usually a story, involving animals, cars or candies that let the kid count. “Our third child started, at age two, yelling that he wanted his own math problem because he saw his brother and sister doing it. And we thought, ‘Wow, we have a household where math is the popular thing at bedtime,’” Overdeck said.

In February, Overdeck launched Bedtime Math, an Internet website where she posts daily puzzles for children. Overdeck is particularly keen to hook children on numbers before they go to school. So why introduce little ones to math so early?

Sain Beilock, an expert on performance anxiety, says the more fun and familiar math is early on, the less likely children will feel nervous when they start to learn math in school. “My lab has shown recently that kids as early as first grade report feeling anxious about doing math,” Beilock said.

“You can hear totally educated adults say, ‘You know I’m just not that good at math.’ or ‘I’m kind of afraid of math.’ And that’s a totally acceptable thing for a well-educated person to say, but you never hear them say, ‘Well, you know, I’m just not that good at reading,’” Overdeck said. She wants children and their parents to become as fluent in numbers as they are in Harry Potter.

1.Overdeck majored in astrophysics because she _______.

A. was really fond of mathematics

B. hoped to change math education in the US

C. had an interest in physics

D. would like her children to be good at math

2.What can be inferred from Paragraph 2?

A. Toys can be used to encourage kids in solving math problems.

B. Math will become more popular in every household.

C. Math is enjoyable in Overdeck’s family.

D. The third child is cleverer than his brother and sister.

3.Beilock’s attitude towards Overdeck’s idea is _______.

A. agreeable B. puzzled

C. anxious D. critical

4.The unfavorable situation of the US in math ability is shown by _______.

A. the popularity of Bedtime Math

B. children’s performance anxiety in school

C. people’s response to math

D. adults’ great fondness for Harry Potter

查看答案和解析>>

科目：高中英語 來源：2016屆遼寧實(shí)驗(yàn)中學(xué)分校高三12月月考英語試卷（解析版） 題型：七選五

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，有兩項(xiàng)為多余選項(xiàng)。

Guide for Teenagers

The teenage years can be tough, and it’s normal to feel sad every now and then. But if these feelings don’t go away or become so intense that you can’t handle them, you may be suffering from depression. 1..

Try not to isolate yourself

When you’re depressed, you may not feel like seeing anybody or doing anything. Just getting out of bed in the morning can be difficult, but isolating yourself only makes depression worse. 2.． Spend time with friends, especially those who are active.

Keep your body healthy

Making healthy lifestyle choices can do wonders for your mood. Ever heard of a "runners high"? Physical activity can be as effective as medications for depression, so get involved in sports, ride your bike, or take a dance class. Any activity helps! 3.．As for food, make sure you’re feeding your mind with plenty of fruits, vegetables, and whole grains.

Avoid alcohol and drugs.

You maybe try drinking or use drugs in an effort to escape from your feelings and get a "mood boost," even if just for a short time. However, substance use can not only make depression worse, but can cause you to become more depressed. 4.. You will need special treatment for your substance problem.

5..

Stress and worry can lead to depression. Talk to a teacher if exams or classes seem overwhelming. In addition, if you have a health concern you feel you can’t talk to your parents about, see a doctor. A health professional can help you approach your parents and guide you toward appropriate treatment. If you’re dealing with relationship, friendship, or family problems, talk to an adult you trust.

A. Ask for help if you are stressed.

B. Even a short walk can be beneficial.

C. Turn to your parents for help.

D. As you get out into the world, you may find yourself feeling better.

E. In short, drinking and taking drugs will make you feel worse--not better--in the long run.

F. The more exercise you do, the healthier you will be.

G. Help is available and you have more power than you think.

查看答案和解析>>

科目：高中英語 來源：2016屆江蘇省常州市兩校高三聯(lián)考英語試卷（解析版） 題型：單項(xiàng)填空

—I just can’t believe that Ella the cat has left me forever.

— ______ and cry. Don’t hold it in.

A. Don’t worry B. Go ahead

C. Forget it D. Help yourself

查看答案和解析>>

科目：高中英語 來源：2016屆江蘇省常州市兩校高三聯(lián)考英語試卷（解析版） 題型：單項(xiàng)填空

While previous Chinese series which have gained popularity abroad have been mostly ______ from Chinese classics , such as The Romance of the Three Kingdoms and Journey to the West, Nirvana in Fire, or Langya Bang, is different.

A. adopted B. harvested C. recognized D. adapted

查看答案和解析>>

科目：高中英語 來源：2016屆甘肅天水第一中學(xué)高三普通班上第三次考英語試卷（解析版） 題型：閱讀理解

It’s summer movie time again. Check out our list of four films.

Harry Potter and the Prisoner of Azkaban

Release Date: November 4

Story: It’s the summer before Harry Potter’s third year at Hogwarts School of Witchcraft and Wizardry. A dangerous murderer, Sirius Black, has escaped from the Wizards’ Prison. And he was ordered to kill Harry Potter.

Around the World in 80 Days

Release Date: November 16

Story: This version of the classic novel set in 1872 focuses on Passepartout ( Hong Kong actor Jackie Chan), a Chinese thief who seeks refuge (庇護(hù)) with a strange London adventurer, Phileas Fogg. Passepartout uses his martial art skills(軍事技能) to defend Fogg from danger as he travels around the world in 80 days.

Spider-Man 2

Release Date: November 30

Story: Peter Parker is still coming to accept his dual identity (雙重身份) as the crime superhero Spider-Man. He wants to reveal his secret identity to Mary Jane, meanwhile, his Aunt May is in trouble. This is Dr Otto Octavius who has appeared to bring her a lot of troubles.

King Arthur

Release Date: November 7

Story: King Arthur is presented as a clever ruler who manages to unite all the knights in Britain. Under the guidance of Merlin and the beautiful, brave Guinevere, Arthur will struggle to realize his dreams.

1.When can you see the film acted by Jackie Chan?

A. November 4 B. November 30

C. November 16. D. November 7.

2.In Spider-Man 2, Aunt May’s trouble is caused by______.

A. Spider-Man B. Peter Parker

C. Mary Jane D. Dr Otto Octavius

3.What kind of article of this passage?

A. A news report B. A funny diary.

C. An advertisement. D. A composition.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年山西大同一中高二12月單元測英語試卷（解析版） 題型：書面表達(dá)

書面表達(dá)

以下是一本圖書的基本信息及相關(guān)報(bào)道

要求：

根據(jù)以上信息寫一篇圖書介紹，內(nèi)容包括：

1.圖書的基本信息

2.圖書的相關(guān)報(bào)道

3. 100詞左右。

查看答案和解析>>

同步練習(xí)冊答案