Bicycles are a great way to get around. They’re fun to ride, especially down hills. And, as you speed along the road, you might also think of ways in which you could improve your bike— make it safer, more efficient, or more comfortable. In fact, the two-wheeled machines make for some cool science projects.
This year's Intel International Science and Engineering Fair (ISEF), held last May in Cleveland, featured（had）three bicycle projects from three countries. Like many of the other experiments presented at ISEF, the bike projects showed that some of the most interesting scientific research often begins by taking a closer look at things you care about.
Renato Angulo Chu had even grander ambitions. The 12th-grader from Lima, Peru, wanted to address some of his country's economic troubles.
"I see a problem in my country," Renato said. "If you go to the forests in Peru, in some places you cannot find electricity. If you go with my bicycle, you can turn on the lights."
Renato, 16, spent 3 years designing his special Multibike. The device looks like a fixed exercise bike. It has wires fixed along the frame and a blender strapped(fastened) to the back. Turning the pedals operates the blender. The same principle can be used to sharpen knives or sweep city streets.
The Multibike can work either as a fixed bike or as a bicycle able to travel city streets and country roads. It's made from inexpensive materials, and the user gets exercise while pedaling to operate a machine.
"You pedal the bike, and you can mix any drink you want," Renato said. More importantly, he added, the same concept could be used to bring light to houses in remote regions of the rainforest.
19. What can we learn from the first paragraph?
A. Bicycles are the best way to go about
B. Bikes should be made more comfortable to ride.
C. You can improve your bicycle for science research.
D. Many inventions are connected with the bicycle.
20. Which of the following is true according to the passage?
A. ISEF is an exhibiton displaying bicycle experiments designed by students.
B. Looking closely at things you are concerned about can lead to scientific research.
C. Renato’s improvement of the bicycle has solved the country’s great problem.
D. Renato’s special bicycle will soon be put into use in remote areas.’
21. The underlined word “address” in the third paragraph probably has the same meaning as _______.
A. make address written        B. give up             C. work at             D. speak at
22. Renato’s special Multibike has all the following EXCEPT  ________.
A. making knives sharp                                     B. mixing any kind of drinks
C. producing electricity                                     D. operating a machine with its own electricity
23. It can be inferred that Renato’s special bicycle is mainly designed for ________.
A. distant areas in the rainforest without electricity.
B. the use of his own family to make life easier.
C. the competition of ISEF to win money to support remote rainforests
D. enough exercise by pedaling it

19---23   CBCDA  

本文介紹了一種特殊自行車以及它的多種便利。
19．C 細(xì)節(jié)理解題。改進(jìn)自行車也可以成為科學(xué)項(xiàng)目。由第一段“In fact, the two-wheeled machines make for….”得出答案。
20．B 判斷歸納題。仔細(xì)觀察你所關(guān)心的東西能夠?qū)е驴茖W(xué)研究。由第二段“the bike projects showed that some of the most interesting scientific research often…..”得出答案。
21．C 詞義猜測(cè)題。從詞語(yǔ)的上下文來(lái)看，address在此處的意思是“從事于”，即解決一個(gè)問(wèn)題。由三四段得出。
24．D 判斷歸納題。這種獨(dú)特的自行車可以磨刀、發(fā)電、攪拌飲料；文中沒(méi)有提到用自發(fā)的點(diǎn)驅(qū)動(dòng)電機(jī)。由倒數(shù)二、三段得出答案。
23．A 推理判斷題。這輛特殊自行車的主要目的是能在偏遠(yuǎn)雨林地區(qū)發(fā)電用。由三、四段和最后一段“More importantly, he added, the same concept could be used….”得出答案。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.
Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.
Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.
The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.
Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．
"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."
He said further studies are required to confirm the findings.
Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒謬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."
Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
64．What’s the best title of this passage?
A．Sunshine 'helps to keep you young'
B．Vitamin D has a protective effect on many diseases
C．Telomeres - a biological marker of ageing
D．People have found the secret to having a long life
65．How can people get vitamin D?
A．through water           B．through sunshine     
C．through food               D．both B and C
66．What does the underlined word in paragraph three refer to?
A．It refers to a kind of vitamin that can keep you young.
B．It refers to a biological marker of ageing found in DNA.
C．It refers to a kind of element that can be obtained from sunshine.
D．It refers to a part of the body.
67．Which of the following is not true according to the passage?
A．women with high levels of vitamin D shows a sign of being biologically younger and healthier.
B．vitamin D has a protective effect on many ageing related diseases.
C．too much sunshine may increase our risk of skin cancer.
D．It has been proved that sunshine 'helps to keep you young'.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空


Many people find that regular physical activity gives them an unexpected benefit.They sleep better and wake up feeling more__61 ,in part due to increased
amounts of deep sleep. Deep sleep may play a role in the body restoring(恢)itself__62,as opposed to REM(rapid eye movement) or dreaming sleep. Researchers have found that physical exercise, especially__63 in the afternoon orearly evening,produces more__64 early in the night.
__65can also help you get a better night's sleep in a number of indirect ways. The relaxation and tiredness __66by exercise can improve sleep.
Exercise encourages weight loss and also may __67 depression. Exercising later in the day can also help delay the __68 drop in your body's temperature. The __69  of exercise are especially important for older people, __70 exercise has been shown to increase the amount of sleep senior adults get in a night and reduce the time it takes to fall asleep. But be sure you finish exercising at least 4 hours before bedtime—working out later than that could leave you too excited to fall asleep easily.
61.A. conscious      B. peaceful      C. effective      D. refreshed
62.A. physically     B. mentally      C. emotionally    D. regularly
63.A. made           B. done          C. functioned     D. conducted
64.A. night's sleep     B. dreaming sleep   C. deep sleep       D. REM
65.A. Exercise       B. Dreams        C. Researchers    D. Doctors
66.A. recovered      B. strengthened  C. caused         D. reduced
67.A. increase       B. relieve       C. release        D. arouse
68.A. nighttime      B. daytime       C. dinnertime     D. lifetime
69.A. disadvantages  B. benefits      C. ways           D. places
70.A. yet            B. if            C. when           D. Since

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空

Parents who smoke often open a window or turn on a fan to clear the air for their children, but experts now have identified a related threat to children's health that isn't as easy to get rid of: third-hand smoke。
That's the term being   1  to describe the invisible yet poisonous mixture of gases and particles(顆粒) clinging(依附) to smokers' hair and   2 , not to mention cushions and carpeting, that stays long after second-hand smoke has cleared from a room. The remaining   3 heavy metals, carcinogens(致癌物) and even radioactive materials that young children can get on their hands and take in,   4 if they're crawling or playing on the floor。
Doctors from MassGeneral Hospital for Children in Boston coined the term "third-hand smoke" to   5 these chemicals in a new study that   6 on the risks they pose to infants and children. The study was published in the  7 issue of the journal Pediatrics。
"Everyone knows that second-hand smoke is bad, 8 they don't know about this," said Dr. Jonathan P. Winickoff, the lead author of the study and an assistant professor of pediatrics at Harvard Medical School。
"When their kids are   9 the house, they might smoke. Or they smoke in the car. Or they strap(用帶子捆扎) the kid in the car seat in the back and crack the window and   10 , and they think it's okay because the second-hand smoke isn't getting to their  11 . We needed a term to describe these tobacco toxins that aren't  12 ."
The study reported on  13 toward smoking in 1,500 households across the United States. It found that the vast majority of both smokers and nonsmokers were   14 that second-hand smoke is harmful to children. Some 95 percent of nonsmokers and 84 percent of smokers  15 with the statement that "inhaling smoke from a parent's cigarette can   16 the health of infants and children"。
But   17 fewer of those surveyed were aware of the  18 of third-hand smoke. Since the term is so new, the researchers asked people if they agreed with the statement that "breathing air in a room   19 where people smoked yesterday can harm the health of infants and children"。
Only 65 percent of nonsmokers and 43 percent of smokers agreed with that  20 , which researchers interpreted as acknowledgement of the risks of third-hand smoke。
(    ) 1. A. told                 B. discussed   C. used                 D. mentioned
(    ) 2. A. shoes                      B. clothing     C. body                D. mouth
(    ) 3. A. includes           B. covers       C. finds                D. improves
(    ) 4. A. especially         B. specially    C. immediately      D. regularly
(    ) 5. A. name                      B. call           C. explain             D. describe
(    ) 6. A. focused            B. tended       C. tried                 D. worked
(    ) 7. A. later                 B. latest         C. best                  D. previous
(    ) 8. A. but                  B. and           C. however           D. or
(    ) 9. A. alongside          B. out of        C. in                    D. beside
(    ) 10. A. cough             B. talk           C. observe            D. smoke
(    ) 11. A. cars                B. seats          C. kids                 D. windows
(    ) 12. A. visible            B. invisible    C. poisonous         D. concrete
(    ) 13. A. policies          B. attitudes    C. bans                 D. habits
(    ) 14. A. told                B. content      C. confident          D. aware
(    ) 15. A. opposed          B. agreed       C. fought              D. connected
(    ) 16. A. harm              B. destroy      C. improve           D. confuse
(    ) 17. A. quite              B. very          C. far                   D. too
(    ) 18. A. chances          B. risks          C. abilities            D. conditions
(    ) 19. A. tomorrow       B. today               C. yesterday          D. weekend
(    ) 20. A. statement               B. mark         C. discussion         D. prejudice

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Fat and shy，Ben Saunders was the last kid in his class picked for any sports team. “Football，tennis，cricket—anything with a round ball，I was useless，” he says now with a laugh. But back then he was the one always made fun of in school gym classes in Devonshire，England.
It was a mountain bike he received for his 15th birthday that changed him. At first he went biking alone in a nearby forest. Then he began to ride the bike along with a runner friend. Gradually，Saunders set up his mind on building up his body，increasing his speed and strength. At the age of 18，he ran his first marathon.
The following year he met John Ridgway and was hired as an instructor at Ridgway’s school of adventure in Scotland，where he learnt about Ridgway’s cold-water exploits. Greatly interested，Saunders read all he could about North Pole explorers and adventures，then decided that this would be his future.
　　In 2001，after becoming a skillful skier，Saunders started his first long-distance expedition towards the North Pole. It took unbelievable energy. He suffered frostbite，ran into a polar bear and pushed his body to the limit，pulling his supply-loaded sled up and over rocky rice.
　　Saunders has since become the youngest person to ski alone to the North Pole，and he’s skied more of the North Pole by himself than any other British man. His old playmates would not believe the change.
Next October，Saunders，27，heads south from the coast of Antarctica to the South Pole and back，a 2900-kilometer journey that has never been completed on skis.
小題1:Which of the following is the correct order of the events that happened to Saunders?
a. He ran his first marathon.
b. He skied alone in the North Pole.
　  c. He rode his bike in a forest
.d. He planned an adventure to the South Pole.
A．a(chǎn)-c-d-bB．c-d-a-bC．a(chǎn)-c-b-dD．c-a-b-d
小題2:The underlined word “exploits” is closest in meaning to______
A．journeysB．operationsC． researchesD．a(chǎn)dventures
小題3:The story mainly tell us about Saunders that he is______
A．a(chǎn) good instructor at schoolB．the best British skier
C．Ridgway’s favorite studentD．a(chǎn) success in sports
小題4:Ben Saunders______after he was 15 years old .
A．become good at most sports.B．began to build up his body.
C．made friends with a runner.D．joined a sports team

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Do you wake up in the morning dreading the moment that your feet have to hit the floor for you to get ready for work? If that’s the case, join most of Americans. Very few people wake up to that annoying alarm clock and spring out of bed excited about having to go to work.
As if that were not enough, most of us have to fight traffic getting there, usually an hour’s drive. Then, when we get to work, we have to fight with unruly co-workers or a nagging boss. And to make matters worse, you have to fight the same traffic going in the opposite direction just to get back home.
Making dinner, fixing plates, eating and then straightening up afterwards is a job within itself. If that sounds like your life, you probably have a J-O-B. you know what J-O-B stands for? Just Over Broke, that’s what! With a job, most Americans are living paycheck-to-paycheck and hating every minute of it. I know because I was doing the same thing: trading time for money. And, I came to a conclusion that it stinks (糟糕透了)! Big time!
Looking around at my co-workers, friends and relatives, I saw that they were all doing the same thing I was doing. They were complaining about the same things I was complaining about : not having enough time or money. And, I decided that I wanted to do something different.
So, I started a home-based business. There are several to choose from. The extra income has done so much for our family. We can vacation more. We have been able to give more. And, we’ve even been able to do something calling save! It’s been amazing.
Therefore, if you’re sick and tired of being sick and tired, it’s time you make a change, too. The definition of insanity (瘋狂) is doing the same thing over and over and expecting different results. I know you aren’t stupid. If you continue to do what everyone else is doing: trading time for money, you’re going to keep getting what everyone else is getting: being broke and not having the time to do what is really important to you.
Do your due diligence. Find a home-based business that works well for you. Go to work, and live the life you’ve always imagined!
小題1:According to Paragraph 1, which of the following statements is TRUE about most Americans?
A．Most Americans are excited to go to work every day.
B．Most Americans are used to sleeping in the morning.
C．Most Americans are tired of having to go to work every morning.
D．Most Americans have alarm clocks to wake them up in the morning.
小題2:By writing the first three paragraphs, what feeling does the writer express?
A．Regret.B．Joy.C．Pride.D．Dissatisfaction
小題3:What does “something different” in Paragraph 4 refer to?
A．To set up a business at home.B．To complain about life and work.
C．To spend more time on holidays.D．To resign from the former job and get a new one.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


　　Sports can help you keep fit and get in touch with nature .However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.
Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses（球場(chǎng)） in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.
There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.
Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.
64. Which of the following is the author most probably in favor of?
A. Cycling around a lake.         B. Motor racing in the desert.
C. Playing basketball in a gym.    D. Swimming in a sports center.
65. What do we know about golf from the passage?
A. It is popular in Portugal and Spain.
B. It causes water shortages around the world.
C. It pollutes the earth with chemicals and wastes.
D. It needs water and electricity to keep its courses green.
66. The author uses power walking as an example mainly because______.
A. it is an outdoor sport     B. it improves our health
C. it uses fewer resources    D. it is recommended by experts
67. The author writes the passage to_______.
A. show us the function of major sports
B. encourage us to go in for green sports
C. discuss the major influence of popular sports
D. introduce different types of environment-friendly sports

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Do you like sports? If your answer is yes, sometimes you will find it very difficult to have enough time to do it even if it’s on weekends. However, you don’t have to worry now because of a “sunshine sports” program launched (啟動(dòng)) by the Ministry of Education.
It suggests students around the country have an hour of sports every day. The difference is that students will be able to do any sport they please. The idea is to make students happy and keep them healthy at the same time.
Han Jiawen likes the idea. The 13-year-old studies in Shanghai Yangsi Middle School. Her school began the activity at the beginning of the term. Han an her classmates skipped rope together. “We had a good time,” said Han. “It was better playing than having classes.”
Wang Lichao welcomes the idea, too. “It’s good to be able to breathe some fresh air instead of sitting in the classroom.”
But the 14-year-old from Tianjin wonders whether there will be enough space for everyone. “With so many students outside,” he said, “I’m afraid there won’t be enough standing room in the playground.”
Wu Jiatong’s school in Liaoning already has something like a “sunshine sports” program. From the beginning of this term, Wu and other students at her school have been jogging for 40 minutes every morning. “It’s tiring,” said Wu. “But we do feel healthier.” “We hope we can do what we want. The school says later we can have rope skipping or kicking jianzi. I can’t wait!” she said.
What about your school? There must be more sports that interest you and your schoolmates.
56. According to the author, which of the following allows the students to have enough time to do sports?
A. The headmaster.           B. A teacher.   
C. A TV program.            D. A program called “sunshine sports”.
57. What does Han Jiawen think of the “sunshine sports” program?
A. It’s useless.   B. It’s wonderful.   C. It’s healthy.   D. It’s tiring.
58. According to the passage, Wu Jiatong ________.
A. hates her school program--- jogging
B. doesn’t like sitting in the classroom
C. wants to do different kinds of sports
D. complains there isn’t enough room to do sports
59. Which of the following statements is true?
A. All the students think it easy to carry out the program.
B. The program allows students to have an hour of sports on weekends.
C. Wang Lichao thinks sitting in the classroom is better than playing.
D. There may be not enough room for every student to do sports in some schools.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


B
There is an English saying: “l(fā)aughter is best medicine.” Until recently, few people took the saying seriously. Now however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter really can improve people’s health.
Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter had similar effects to physical exercise. It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.
Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programmer. The group that tolerated the pain for the longest time was the groups which listened to a funny programmer. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish both stress and pain.  
As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.
60.Doctors have proved the following EXCEPT that      .
A. smiling does good to health                  B. laughter can be tolerated
C. there is a way to reduce pain                      D. laughter can work the muscles in the feet
61. The main idea of the passage is       .
A. laughter and physical exercise have similar effects on the human body
B. smile can produce the same effects as laughter
C. pain can be reduced by laughter  
D. laughter is the best medicine
62.The underlined word “diminish” is similar to       .
A. test             B. stop                     C. reduce                  D. increase
63. Doctors hold laughter clinics _________.
A. to give better condition to their patients
B. in order to improve patients’ health
C. to make patients smile   
D. to prove smile and laughter have the same effect

查看答案和解析>>

同步練習(xí)冊(cè)答案