5-second rule:what’s the truth?

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 found 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 food—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 various types of flooring-carpet, 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 from carpet, while they’re most likely to transfer from laminate or tiled surfaces 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 carried an infection(感染) risk. “It very much depends on which bacteria are on the floor at the time,” Hilton told Forbes.

1.What is the “5-second rule” about?

A. People often shout at someone when they drop food on the floor.

B. Food is safe when you pick up off the floor in less than five seconds.

C. It’s better to eat dropped food when it’s been on the floor for over five seconds.

D. Food will go bad when dropped on the floor in five second or less.

2.Hilton’s test wanted to find out ________.

A. if the “5-second rule” is true B. the students’ favourite food

C. which food is easily dropped D. if different types of floor have different bacteria

3.According to the test, we learn the following EXCEPT ________.

A. the dropped food had more bacteria if it sat on the floor for longer

B. the dropped food on carpet had the least bacteria

C. bacteria was impossible to transfer from laminate or tied surfaces

D. the wetter food was more likely to pick up bacteria

4.According to the article, the infection risk of the dropped food does NOT depend on _______.

A. how long the food sits on the floor B. what the dropped food was

C. what the bacteria are D. what the weather is like that day

In Singapore, many middle school students spend a lot of time on their studies.People think good schooling is a ticket to success in their future.So, many of these students try their best to get good marks in their exams.They have a lot of homework every day and exams are usually difficult.Sometimes, some of them have to go to remedial classes after school.

There are many after school activities:sports and games, music and dance, hiking and rock climbing, etc.They are also very happy to do community service (社区服务).

In their free time, most students like to listen to pop music.Hollywood blockbusters (好莱坞大片),Hong Kong and Singapore movies are very popular among them.Some of them also spend their free time surfing the Internet, emailing their friends and playing computer games.

They sometimes go to cafes, fast food restaurants, shopping centers and big bookstores.

So, it looks like the life as a middle school student in Singapore is not easy but it is rich and colorful.

1.Students in Singapore think if they want to have a good future they will ________.

A. get good schooling B. do after class activities C. do much homework

2.The underlined word “remedial” means “________” in Chinese.

A. 额外的 B. 补习的 C. 业余的

3.Which of the following is NOT an activity the students do in their free time?

A. Listening to pop music. B. Doing their homework. C. Going to shopping centers.

4.Which of the following is RIGHT?

A. All of the students go to remedial classes after school in Singapore.

B. The middle school students' life in Singapore is hard but interesting.

C. Only a few students like to surf the Internet in their free time.

5.The best title for the text is ________.

A. How to get good marks in Singapore B. The free time activities in Singapore

C. The students' life in Singapore

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