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.

1.What can we learn from the first paragraph?

A．Bikes should be made more comfortable to ride.

B．You can improve your bicycle for science research.

C．Many inventions are connected with the bicycle.

D．Bicycles are the best way to go about

2.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.’

3.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

4.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

5.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

 

Internet dating has become one of the biggest and most successful business ventures on the Internet. Basically, Internet dating is a way to meet people for either friendship or dating without actually having to meet them in person first.

The first thing to do if you decide to try Internet dating is to build your profile(简介) which can include your hobbies, hopes for the future, and so on. A photograph is optional, but many sites claim that a photograph increase the number of people who look at your profile. Many Internet dating sites will charge a one-time registration(注册) fee to use their services.

Internet dating makes it possible to meet people from all over the world. You can even narrow the search down to your area by zip code. Another advantage is that you can communicate by email before you meet in person. Thousands of people have met, fallen in love, and married through Internet dating. It is an excellent way for shy people to meet. It is also a way for people with busy lives to connect with others, and an easy way to meet people who share your interests.

Just as in conventional(传统的) dating and love, there are some pitfalls to be aware of in Internet dating. The person you have been talking to on the net may not be who they say they are. Be very aware that there are some people who misrepresent their appearance or private details, such as marital(婚姻) status, income, and so on, for their own reasons. It would not be the first time that someone has been taken in, and talk shows are full of cheating partners who have been caught dating over the Internet in their spare time. Nevertheless, taking a few simple precautions should help ensure that your Internet dating experience is fun.

1. The purpose of writing the passage is to________.

A．persuade readers to go dating on the Internet.

B．inform us how to date on the Internet.

C．warn readers against web love.

D．introduce Internet dating to us.

2.Which of the following is a must to make an Internet dating possible?

A．A photo                              B．A profile

C．Registration fee                         D．Business experience

3. One advantage of Internet dating is that_______.

A．you can avoid a face-to-face meeting in the beginning.

B．you’re sure to find a partner with the same interests.

C．you’ll find absolutely reliable information of others.

D．you’ll gain fame and money overnight

4.The underlines word “pitfalls” in Paragraph 4 most probably means________.

A．rules             B．trends            C．problems          D．skills

5. What is probably talked about following the last paragraph?

A．Conventional dating.                     B．Hidden advantages.

C．Safety measures.                        D．Romantic love.

 

The new clothes in that shop are so beautiful that Anna can not     taking a closer look at them, though she can not afford them at present.

A．enjoy

B．imagine

C．risk

D．resist

 

Below is some advice on how to prevent cancer:

8 Ways to Avoid Cancer in Your Life

1. Eat Blueberries

Aside from being a healthy and delicious snack, blueberries contain pterostilbene, which has important colon（结肠） cancer-fighting prosperities. But wait, it gets better. Blueberries also offer a large dose of vitamins C (14 milligrams per cup). So at breakfast, try to take in a cup and a half of blueberries in your cereal or yogurt, or mixed with other berries.

2. Drink Pomegranate（石榴）Juice

The deep red juice of the pomegranate contains polyphenols, isoflavones and ellagic acid, which together create a powerful anticancer mixture. Most recently, researchers from the University of Wisconsin at Madison has discovered that 16 ounces of pomegranate juice per day also may inhibit the growth of lung cancer.

3. Relax

Feeling stressed or worried? Find ways to relax and you may reduce your chances of developing cancer. Purdue University researchers tracked 1,600 men over 12 years and found that half of those with high levels of worry died during the study period. Only 20 percent of the optimists died before the study were completed, while 34 percent of the extremely anxious men died of some type of cancer. Instead of stressing about the past or future, focus on the present and relax!

4. Take Selenium（硒）

Selenium is well known for its cancer-fighting properties. In a study of almost 1,000 men, researchers from the Journal of the National Cancer Institute found that when men with the lowest initial levels of selenium in their bodies received a daily supplement over a 4 year period, they cut their prostate（前列腺） cancer risk by a remarkable 92 percent. However, it is possible to get too much of a good thing, so monitor your intake of selenium-containing supplements, Brazil nuts, tuna, meats and grains carefully.

5. Eat Sushi（寿司）

Seaweed may not be your idea of a great snack, but it is high in fiber, calcium and iron, and dry, roasted seaweed sheets used in sushi provide the additional benefits of vitamins A and C. Sushi rolls are also high in protein— a typical spicy tuna roll has only 290 calories but packs 24 grams of protein. So don’t skimp（节省）on the Sushi!

6. Enjoy the Outdoors

Vitamin D causes early death of cancer cells. A study published in the American Journey of Clinical Nutrition reported that women who supplemented their diets with 1,000 international. Units of vitamin D every day had a 60 percent to 77 percent lower incidence of cancer ever a four-year period that did women taking a placebo(无效对照剂). Experts recommend supplementing your fun in the sun with 1,100 to 2,000IU of vitamin D each day.

7. Breathe Clean Air

There’s no question that secondhand smoke kills. A recent American Journal of Public Health study showed that nonsmokers working in smoky places had three times the amount of carcinogen（致癌物质） in their urine（尿） than nonsmokers working in smoke-free locations. What’s worse, their levels of the carcinogen rose 6 percent for every hour worked. Nine states have banned smoking in all workplaces, bars and restaurants. The message is clear: Do whatever you can to avoid the cloud of smoke.

8. Break a Sweat

Even a small amount of exercise can offer major cancer-fighting benefits. In a study of 29,110 men published in the International Journal of Cancer, men who exercised just once a week had a percent lower risk of metastasis(转移性) prostate cancer than men who didn’t work out at all. The better the frequency, duration and intensity of the exercise, the bigger the reduction in risk, according to the study.

1.To prevent yourself from catching colon cancer, you should eat ____ as often as possible.

A．sushi

B．blueberries

C．pomegranates

D．Vitamin D

2.A person is very likely to catch some type of cancer if ______.

A．he is very fond of exercise every day.

B．he is addicted to smoking

C．he is always feeling extremely stressed or worried

D．he likes to have meals in restaurants

3._____ will remarkably reduce the risk of men’s prostate cancer.

A．Having a daily supplement of selenium

B．Drinking a cup of pomegranate juice every day

C．Breathing fresh air now and then

D．Taking exercise at least once a week

4.If you want to keep cancer away, it is particularly important to ______.

A．have a daily supplement of vitamins B and C

B．try to ignore the secondhand smoking

C．take in as many selenium-containing supplements as possible

D．having exercise as often as possible

 

阅读下列短文，根据所读内容在文章后的表格中填入恰当的单词。注意：表格中的每个空只填一个单词。

Stress is an uncomfortable feeling in the mind from any situation or thought that makes you feel frustrated,angry, or anxious. Stress is often accompanied by physical symptoms like trembling,sleeping difficulties and nightmares（恶梦）.

Stress is a normal part of life.In small quantities,stress is good—it can motivate you and help you be more productive. However,too much stress is harmful. It can cause general poor health as well as specific physical or mental depression. Persistent and never-ceasing stress often leads to anxiety and unhealthy behaviours like abuse of alcohol or drugs.

Certain drugs can lead to symptoms of stress due to side effects. A poor diet can also contribute to stress or anxiety.Performance stress is related to specific situations,like taking a test or making a presentation in public. Post-traumatic stress develops after an unforgettably shocking event like war, physical attacks, or a natural disaster.

Any effective ways to cope with your stress or anxiety? One step is to make a list of what you think might be making you ‘stress out’:Is something constantly on your mind? Does anything in particular make you sad or depressed?

Then,find someone you believe in who will listen to you. Often,just talking to a friend or loved one is all that is needed to relieve anxiety. Most communities also have support groups and hotlines that can help. Social workers,psychologists,and other mental health professionals may be needed for therapy and medication.

Also, find healthy ways to deal with stress. For example, eat a healthy diet,get enough sleep, exercise regularly, limit caffeine and alcohol.Learn and practice relaxation techniques like yoga and tai chi. Make sure to balance fun activities with your responsibilities. Spend time with people you enjoy. Find self-help books at your local library or bookstore.

Title	Stress
The 1.　　　 of stress	An uncomfortable feeling in the mind,making you feel frustrated,angry and anxious,2.　　by many symptoms
The3.　　 stress has on people	●Positive/good stress can motivate people,4.　　people be more productive  ●5.　　/harmful stress will cause poor health as well as physical and psychological illnesses
Possible6.　　 of stress	●Side effects of certain drugs ●Poor diets ●Stress 7.　　with specific situations,like taking a test or making a presentation in public  ●Stress developing after unforgettably shocking events,like war,physical attacks,or a natural disaster
Effective 8. to coping with stress	●9.　　what makes you “stress out”  ●Finding someone you trust who will listen to you ●Finding healthy ways to deal with it,such as10.　　　good habits and living a healthy life