It is bad to have food stuck between your teeth for long periods of time. This is because food attracts germs; germs produce acid, and acid hurts your teeth and gums. Flossing (使用牙线) helps to remove the food that gets stuck between your teeth. This explains why flossing helps to keep your mouth healthy, but some doctors say that flossing can also be good for your heart.

    It may seem strange that something you do for your teeth can have any effect on your heart. Doctors have come up with a few ideas about how flossing works to keep your heart healthy. One idea is that the germs that hurt your teeth can leave the mouth and travel into your blood.Germs that get into the blood can then attack your heart. Another idea is based on the fact that when there are too many germs in your mouth, the body tries to fight against there germs. For some reason, the way the body fights these mouth germs may end up weakening the heart overtime.

    Not every doctor agrees about these ideas. Some doctors think that the link between good flossing habits and good heart health is only a coincidence. The incidence (发生率) of two or more events is completely random, as they do not admit of any reliable cause and effect relationship between them. For example, every time I wash my car, it rains. This does not mean that when I wash my car, I somehow change the weather. This is only a coincidence. Similarly, some doctors think that people who have bad flossing habits just happen to also have heart problems, and people who have good flossing habits just happen to have healthy hearts.

    The theory that flossing your teeth helps to keep your heart healthy might not be true. But every doctor agrees that flossing is a great way to keep your teeth healthy. So even if flossing does not help your heart, it is true to help your teeth. This is enough of a reason for everyone to floss their teeth every day.

    Volunteering at a nursing home is an often overlooked volunteer area and yet one of the most needed. Statistics show that only 50 percent of nursing home residents have no close relatives and 46 percent have no living children. {#blank#}1{#/blank#}However, the self gratification and relationships you will receive is too unusual to be replaced.

    Make a list of nursing homes you are able to volunteer at on a regular basis. When doing this, use any resources from family members, friends, or even use an online search engine to find nursing homes. When choosing your home, also keep in mind your schedule; make sure that you can be fully committed to any obligations that the nursing home may give you. {#blank#}2{#/blank#}

    {#blank#}3{#/blank#}Before calling, choose your times wisely, anytime between 9am-11am and 2pm-5pm would be a good option. By avoiding meal times or later at night, you'll have a better chance for getting information and finding people who are free to talk with you.

    Ask for an application form. {#blank#}4{#/blank#}This step is also where your applicant process begins. They will hand you all necessary applicant information. Most nursing homes will conduct interviews, do background checks, and may even have you receive vaccines and take drug tests.

    Become a "volunteer in training" at the nursing home. {#blank#}5{#/blank#}Because of the wide variety of possible areas, you may experience variations in your training length and the content may vary.

A. Expect to attend training if your application is approved.

B. Call or visit the top three of your chosen nursing home options.

C. Volunteering at a nursing home can be a really wonderful experience.

D. From your list, choose the top three that cater to what you are looking for.

E. You will be taken into training depending on the area you are assigned to train in.

F. The process of becoming a volunteer at a nursing home can often be a little too long.

G. The activity director or volunteer coordinator will handle all of your information from here.

The Young Scientists Club was founded in 1999 with a clear and simple goal—to offer young children quality science-related products that will attract them with the wonders of scientific discoveries and increase their interest in science.

    All the products are designed by a team of Harvard graduates, scientists, educators and parents with one purpose in mind to combine fun and interest with quality and learning in each product. Of course, no product is put on the market before it has passed the final test.

    The Young Scientists Club was created to fill a void(空白) of good-quality science products for young children. They believe that children should know the exciting field of science at any early age with fun and bands-on games, activities and experiments.

    All the young scientists in the club are encouraged to continue their scientific adventures by exploring each different topic in more detail by entering online Young Scientists Clubhouse. There the young scientists can not only explore scientific topics and scientific experiments in depth, but can also e-mail Celsius with questions, results and comments. Celsius loves to e-mail all young scientists back.

Those who are at The Young Scientists Club have received many awards for their products. The Young Scientists Club is excited to realize its goal—-to take children around the world and take part in an educational scientific adventure that lasts a lifetime.

    As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things.

    Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight, Very often the effects of pollution are not noticed for many months or years because the first organisms（生物体）to be affected are either plants or plankton. But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it's not until dead fish and water birds are seen at the river's edge or on the seashore that people realize what is happening.

    Where do the substances which pollute the water come from? There are two main sources of sewage（污水）and industrial waste . As more detergent（洗涤剂）is used in the home, so more of it is finally put into our rivers, lakes and seas . Detergents harm water birds, dissolving the natural substances which keep their feathers water - proof. Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful as there are many highly poisonous things in it, such as copper and lead（铅）.

    So, if we want to stop this pollution, the answer is simple: sewage and industrial waste must be made clear before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.

    Finding a winter job is often a proof that you're growing up, and it's also a method for earning money to pay for what you dream of. It's never too early to start considering the future. Now, here are some good choices for you!

Retail (零售) Sales

    Retail offers plenty of opportunities for teens that are looking for a job. This type of work can pay from $10 to $15 an hour depending upon the duty you are expected to take on. It can also be great for teens who are friendly and enjoy talking to other people. For more information, call us at 4005075.

Food Service

    A job in the food service industry is a natural fit for sociable teens who enjoy communicating with the public. It allows employees to work as part of a team while learning about following instructions. It also comes with the opportunity to earn between $8 and $10 per hour. Just dial 4005077 for more information.

Babysitting

    This job requires someone who is highly responsible. Though it pays generally between $6 and $8 hourly, it also requires a lot of patience. This is a great choice for teens who wish to make a career in teaching, child care, social work or any other field that makes use of social skills or requires interaction with kids. Got a question? Just dial 4005076.

Housekeeping

    This type of work can bring in about $5 an hour and it will allow teens to learn the tourism industry, so hotels are often looking for more housekeeping staff, and parks often need more people to assist with keeping public areas clean and organized as well. Telephone: 4005079

    Research shows that some orchestral(管弦乐的) instruments are in a danger of dying out.YouGov research, asked by the Royal Philharmonic Orchestra (RPO) to find the most popular instruments among schoolchildren, has revealed the increasing popularity of the ukulele(尤克里里琴), with one in eight expressing a desire to learn, making it the highest ranked instrument behind the typical rock-band grouping of the guitar, piano, keyboards, drums and bass guitar.

    But younger generations' interest in"more complex instruments"is decreasing, with the three least popular being the French horn, the double bass and the trombone.

    James Williams, managing director of the RPO, believed the changes reflect the increasing pressure schools are under to provide music education, and went on to say that more needs to be done to interest secondary school students in the wider range of instruments. His concern was for the composition(构成) of future orchestras if the trend towards instruments like rock-band grouping were allowed to continue. But there may be yet another death, one that few would be quick to sorrow over：the recorder(竖笛).

    Cheap, convenient, easy to learn, and suitable for individual and group performances, the recorder was once the go-to instrument for children's early musical education.But in many schools it has been replaced by the ukulele, which, for teachers, offers many of the same benefits with none of the lasting damage to hearing. Plus, from a student's viewpoint: you can play Metallica on one.

    Not all hope is lost for the cream-colored, 10-pound Yamaha recorder with a long history, however. About 13% of girls and 4% boys surveyed by YouGov said they wanted to learn the recorder.Surprisingly high! Unlikely as it may be, these children's interest in the recorder must be encouraged.