Almost everyone has dropped some food on the floor and still wanted to eat it. If someone saw you drop it, he or she might have shouted, “5-second rule!” This so-called rule says food is OK to eat if you pick it up in five seconds or less. But is that true?
Professor Anthony Hilton from Ashton University, UK, tested the rule with his students. They wanted to prove that food dropped for five seconds is less likely to contain bacteria(细菌) than if it sits there for longer.
For the study, Hilton and his students tested a lot of foods, such as bread, pasta, cookies and candy, to see how much bacteria they had when they made contact with the floor. They allowed the food to lie on the different types of flooring, like carpet(地毯), laminate (复合地板) and tile (瓷砖), for three seconds to 30 seconds.
Not surprisingly, the longer the food was on the floor, the more bacteria it had. And the type of floor where the dropped food landed had an effect. Bacteria are least likely to transfer (转移) from carpet, while they are most likely to transfer laminate or tiled surface after more than five seconds.
The study also found that the wetter the food, the more likely it was to pick up bacteria. Although most people are happy to follow the 5-second rule, eating food dropped on the floor still carries an infection (感染) risk. “It also depends on which bacteria are on the floor at the time.” Hilton told Forbes.
【小题1】What is the “5-second rule” mean?| A．People often shout at someone when they drop food on the floor. |
| B．Food will go bad when dropped food on the floor in five seconds or less. |
| C．Food is safe when you pick it up from the floor in less than five seconds. |
| D．Eating food dropped on the floor for less than five seconds still carries an infection risk. |
| A．where bacteria come from | B．the students’ favorite food |
| C．if the “5-second rule” is true | D．if different types of floor have different bacteria |
| A．the wetter food was likely to pick up bacteria. |
| B．bacteria didn’t transfer from laminate or tiled surfaces. |
| C．the dropped food on the carpet had the least bacteria |
| D．the dropped food had more bacteria if it sat on the floor for longer. |
| A．How long does the food sit on the floor? | B．How to deal with the dropped food? |
| C．What the bacteria are? | D．5-second rule: what’s the truth? |
Water plays an important role in keeping you healthy. This should come as no surprise. Much of your body is made up of water, after all. It keeps your body working properly. But did you know that too much water can make you die?
Water poisoning (中毒) happens when people drink too much water. This lowers the level of sodium (钠) in their blood to dangerous levels. When you have too little sodium in your body, a lot of things will go seriously wrong in your body.
Your brain may begin to swell (膨胀). You may get a headache, feel very tired and sick. You may even lose consciousness. In these cases, water poisoning can be deadly. You will need to go to a hospital immediately.
Protecting yourself from water poisoning may seem easy, however, this is easier said than done. For example, when you do exercise, you may have to drink a lot of water. It is important to balance the amount (量) of water. This can help you stay healthy whenever you are exercising.
So, how much water should a person drink each day? For years, we have been told to drink two liters (公升) of water a day. But in fact, the actual amount needed is different for each person. Today, most doctors are telling people that they should drink water whenever they feel thirsty.
We can’t live without water. Neither can we live with too much water in our bodies. Make sure you take the right amount of it each day — staying healthy is all about staying balanced.
【小题1】What will a person feel when water poisoning happens?| A．The brain works well. | B．Tired and sick. |
| C．Hot and thirsty. | D．The body is larger. |
| A．feeling | B．confidence | C．life | D．body |
| A．We should take the right amount of water each day. |
| B．We should only drink two liters of water a day. |
| C．We should protect ourselves by drinking more water. |
| D．High levels of sodium are good for our health. |
| A．There would be no life without water. | B．Every coin has its two sides. |
| C．Don’t forget the well digger. | D．Rome wasn’t built in a day. |
| A．We can’t Live without Water. | B．We must Drink less Water. |
| C．The Importance of Sodium. | D．Can Water Poison You? |
Keeping better eating habits can help you reduce (减少) disease. A healthy eating plan means choosing the right foods to eat and preparing foods in a healthy way.
_______________________
Do you often change your toothbrush? Maybe you think it is not necessary. A study shows old toothbrushes bring disease. You should often change your toothbrush.
Exercise
Swimming, running, skating, skiing, dancing, walking and some other activities can help you stay healthy. You should exercise at least three times a week and for twenty minutes or more each time. Do it.
Plan out your life
You should have breakfast before you go to school. Have a proper (合适的) meal for lunch. Follow a healthy diet.
【小题1】What’s the passage mainly about?| A．Healthy food. |
| B．Healthy lifestyle (生活方式). |
| C．Healthy sports. |
| A．Man’s disease. | B．Watch the toothbrush. | C．Disease. |
| A．Twenty minutes. | B．Fifteen minutes. | C．Five minutes. |
| A．Proper diet |
| B．Exercise. |
| C．Proper diet and Exercise. |
| A．Choosing the right foods. |
| B．Cooking the foods in a healthy way. |
| C．Both A and B. |
Today in China, there are many children like Wang Yan. Health experts say that children should have healthy eating habits. First, they must eat regular meals and begin with a healthy breakfast. Second, they should have different kinds of foods, such as fruit, vegetables, grain, eggs, milk and meat. Third, children shouldn’t eat too much junk food. It’s delicious, but eating it often is bad for their health. If children do as the experts say, they won’t become overweight. They will be healthier. Students won’t become tired at school, and they will have enough energy to study hard.
【小题1】Why has Wang Yan become overweight?
| A．Because she doesn’t like sports. |
| B．Because she likes eating vegetables |
| C．Because she likes eating snacks. |
| D．Because she likes eating fruit. |
| A．Two. | B．Three. |
| C．Four | D．Five. |
| A．Milk, fruit, KFC chicken. |
| B．Cream biscuits, McDonald’s hamburgers and KFC chicken. |
| C．Packages of biscuits. |
| D．fruit, vegetables, grain, eggs, milk and meat. |
| A．overweight. | B．healthier. |
| C．tired at school | D．confident. |
| A．Terrible. | B．Healthy. |
| C．Unhealthy | D．Sweet. |
组卷网是一个信息分享及获取的平台，不能确保所有知识产权权属清晰，如您发现相关试题侵犯您的合法权益，请联系组卷网
