Long ago, as people got older, there was something wrong with their teeth and it would be very painful.
Later people learned that cleaning their teeth was important, but they didn't have toothpaste(牙膏) at that time.
About 100 years ago someone finally created a kind of cream to clean teeth. Not long after that, the toothpaste tube (管子) was invented, so people could press the toothpaste right onto the toothbrush!
Today there are plenty of toothpaste choices; lots of colors and tastes to choose from, and some kinds of toothpaste are made just for children. When you're choosing a kind of toothpaste, make sure it has fluoride (氟化物).
A.They used lemon juice, salt or other things to clean their teeth. |
B.Tooth brushing became popular during the World War I. |
C.Fluoride makes your teeth strong and healthy. |
D.Today they're made of soft plastic and are much easier to use! |
E.To avoid toothache, they had their teeth pulled out. |
相似题推荐
【推荐1】Staying healthy at work isn't always easy. With some people around you, it may seem impossible. But if you take the following advice, you'll feel better.
This means you need to go to the bathroom for many times every day. Before you eat, after you cough and any other time your hands are dirty, just do it. It is good for your body.
Clean your desk, computer keyboard and anything else you use often. Even if you are the only user, germs(细菌) can live on these things. Don't forget to do that.
Many people don't like eating breakfast because it takes them much time in the morning or they are too busy to eat it. But doctors say that people who always eat breakfast are healthier and can work better in the day.
Cola and coffee may help you feel excited, but they are not so good for your health. So you need to drink enough water every day. Just keep a cup with you all the time and drink water the whole day. You'll probably get what you need.
It's clear these days that smoking is bad for your health. Smokers get sick more easily than those who never smoke. If you are still smoking now, just stop it at once!
A.Give up smoking. |
B.Get enough rest. |
C.Drink at least 8 cups of water a day. |
D.Keep your office clean. |
E.Wash your hands often. |
F.Eat breakfast every day. |
【推荐2】Replacing (替换) some things in your house at the right time can make you healthier. Some researchers show us when and why the following things should be replaced.
Things | ![]() Cutting board | ![]() Toothbrush | ![]() Chopsticks | ![]() Blanket |
Main Material | Wood | Plastic | Wood | Wool |
Cleaning way | Using hot water | Using warm water | Using hot water | Dry-cleaning |
Replacing Reason | Producing bacteria (细菌) | Causing a toothache | Producing bacteria | Being worn out |
Replacing Time | Every three years | Every three months | Every five months | Every five years |
Cost | ¥45.00 each | ¥18.00 each | ¥20.00 a pair | ¥358.00 each |
A.one | B.two | C.three |
A.chopsticks | B.cutting board | C.toothbrush |
A.for dry cleaning | B.for the longest time | C.as long as chopsticks |
A.toothbrushes and cutting boards | B.chopsticks and blankets | C.chopsticks and cutting boards |
A.Chopsticks. | B.Blankets. | C.Toothbrushes. |
During an experiment on 1,000 people, scientists assessed (评定) their personalities in two ways: by asking someone they knew, such as a family member or friend; then by asking someone they had just met, such as a nurse. The study found that those who were careful at age 26 were in better health after 12 years.
Being careful means that people tend to have a lot of self-control, and are less likely to smoke, the scientists said. Careful people are also more likely to have an active lifestyle and healthy diet.
From those who were least careful, 45 percent developed health problems by the age of 38. Such health issues included gum disease and high blood pressure (高血压). To compare, only 18 percent of careful people went on to develop health problems.
Another positive personality was called “openness to experience”, meaning curious and imaginative. People who have more of this personality have higher IQ scores. So they’d be more likely to know how to find medical help to prevent disease.
According to the report, if doctors assessed our personalities, it could help doctors to find which young adults need advice on how to live a healthy lifestyle. What’s surprising is that stress didn’t play a big part on a person’s health. Even though stress and anxiety (焦虑) are usually linked to bad health.
But can a doctor who knows our personality really improve our health? Or should doctors be kept away from knowing something so personal?
1. Which personality type may be better for our health, according to the research?
A.self-controlled. | B.Stressed. |
C.Shy. | D.Careless. |
A.are too shy to talk to strangers |
B.love to ask the doctor for advice |
C.are likely to have a healthy lifestyle |
D.may have high blood pressure when they’re older |
A.Newspaper. | B.Science fiction book. |
C.Research paper. | D.Travel guide. |
A.People can change their personality type. |
B.Scientists have found two different personality types. |
C.Personalities have something to do with our lifestyle. |
D.Personalities say something about our health. |