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
九年级英语阅读单选中等难度题
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
九年级英语阅读单选中等难度题查看答案及解析
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 foods——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—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 very much depends on which bacteria are on the floor at the time.” Hilton told Forbes.
1.What is the “5-second rule’ mean?
A. People often shout at someone when they drop food on the floor.
B. Food is safe when you pick it 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 food on the floor in five seconds or less.
2.Where is Ashton University?
A. In the USA. B. In England.
C. In China. D. In France.
3.Hilton’s test wanted to find out____________.
A. if the “5-second rule” is true
B. the students’ favorite food
C. which food is easily dropped
D. if different types of floor have different bacteria
4.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 the carpet had the least bacteria.
C. bacteria was impossible to transfer from laminate or tiled surfaces.
D. the wetter food was likely to pick up bacteria.
5. According to the article, the infection risk of the dropped does NOT depend on _____________.
A. how long the food sits on the floor
B. what the dropped food is
C. what the bacteria are
D. what the weather is like that day
九年级英语阅读理解困难题查看答案及解析
阅读下列短文, 从每小题的A、B、C、D四个选项中选出最佳选项。
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 foods——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—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 very much depends on which bacteria are on the floor at the time.” Hilton told Forbes.
1. What is the “5-second rule’ mean?
A. People often shout at someone when they drop food on the floor.
B. Food is safe when you pick it 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 food on the floor in five seconds or less.
2. Where is Ashton University?
A. In the USA. B. In England.
C. In China. D. In France.
3. Hilton’s test wanted to find out____________.
A. if the “5-second rule” is true
B. the students’ favorite food
C. which food is easily dropped
D. if different types of floor have different bacteria
4. 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 the carpet had the least bacteria.
C. bacteria was impossible to transfer from laminate or tiled surfaces.
D. the wetter food was likely to pick up bacteria.
5. According to the article, the infection risk of the dropped does NOT depend on _____________.
A. how long the food sits on the floor
B. what the dropped food is
C. what the bacteria are
D. what the weather is like that day
九年级英语阅读理解中等难度题查看答案及解析
阅读下列短文, 从每小题的A、B、C、D四个选项中选出最佳选项。
D
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 foods——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—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 very much depends on which bacteria are on the floor at the time.” Hilton told Forbes.
1.What is the “5-second rule’ mean?
A.People often shout at someone when they drop food on the floor.
B.Food is safe when you pick it 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 food on the floor in five seconds or less.
2.Where is Ashton University?
A.In the USA.
B.In England.
C.In China.
D.In France.
3.Hilton’s test wanted to find out____________.
A.if the “5-second rule” is true
B.the students’ favorite food
C.which food is easily dropped
D.if different types of floor have different bacteria
4.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 the carpet had the least bacteria.
C.bacteria was impossible to transfer from laminate or tiled surfaces.
D.the wetter food was likely to pick up bacteria.
5.According to the article, the infection risk of the dropped does NOT depend on _____________.
A.how long the food sits on the floor
B.what the dropped food is
C.what the bacteria are
D.what the weather is like that day
九年级英语阅读理解中等难度题查看答案及解析
Have you ever seen Along the River During the Qingming Festival?Almost everyone has heard of this painting in his h___1.___ class. But how ___2.___ do you know about the famous painting?
It was painted by Zhang Zeduan, an a___3.___ in the Song Dynasty. The painting shows people’s lives in the Song Dynasty. There are l___4.___ of shops, restaurants, hotels and houses on b__5.__ sides of the river, and the roads are c__6.___ with people.
Now you have the chance to feel like you’re living in that time. The painting was remade into a 3D version. The people, animals and ships are moving in the p__7.__. We can see the river flowing and hear the s__8.___ of the drum. From October 21st to D__9.__11th, the 3D Along the River During the Qingming Festival will be shown in Shanghai. Don’t f__10.___ to see it to feel people’s lives in the Song Dynasty by yourself.
九年级英语单词拼写中等难度题查看答案及解析
Today almost everyone knows computers and the Internet. If I ask you “What is the most important thing in your life?” may be you will say “Computers and the Internet”.
The first computer was made in 1946. It was very big but it worked slowly.. Today, computers are getting smaller, and smaller, but they work faster and faster. What can computers do? A writer has said, “People can't live without computers today.”21cnjy.com
The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, send e-mails, do some shopping, play games or make friends. 21*cnjy*com
Young men, especially the middle school students like the Internet very much. They often go into the Internet bars as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don't know their names, ages and sex(性别). They are so interested in making the “unreal friends” that they can't put their heart into study. Some of them play the games in the Internet bars all day and all night. Many of them can't catch up with others in many subjects because of that.
Now the government has done many things. Some gangster Internet bars(黑网吧)have been banned(取缔). But that's not enough. The teachers and parents are still worrying about their students and children.
We can use computers and the Internet to learn more about the world. But at the same time, we should remember that computers and the Internet could not do all the things.www-2-1-cnjy-com
1.How was the first computers?
A.It was not big. B.It couldn't work fast
C.It was very cheap. D.It was no useful
2.When did people begin to use the Internet?
A.In the 1940s. B.In the 1980s.
C.In the 1970s. D.In the 1960s
3.Which of the following is true?
A. Computers can help people do everything.
B. Middle school students aren't allowed to use the Internet.
C. Some students have used the Internet bars to make the “unreal friends”.
D. computer isn’t good to students.
4.Which is the best title of the passage?
A. Computers and the Internet.
B. The Greatest Invention of This Century.
C. Gangster Internet Bars.
D. How to use the Internet
5.What's the meaning of the word “that” in the fourth paragraph (段落)?
A. Students often go into the Internet bars as soon as they are free.
B. And they play the games in the Internet bars all day and all night.
C. Students are so interested in making the “unreal friends” that they can't put their heart into study.
D. All of above
九年级英语阅读理解简单题查看答案及解析
Today almost everyone knows computers and the Internet. If I ask you “What is the most important thing in your life?” maybe you will say “Computers and the Internet”.
The first computer was made in 1946. It was very big but it worked slowly.. Today, computers are getting smaller and smaller, but they work faster and faster. What can computers do? A writer has said, “People can't live without computers today.”
The Internet came a little later than computers. It is about 25 years later than computers. But now it can be found almost everywhere. We can use it to read books, send e-mails, do some shopping, play games or make friends.
Young men, especially the middle school students like the Internet very much. They often go into the Internet bars as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don't know their names, ages and sex. They are so interested in making the “unreal friends” that they can't put their heart into study. Some of them play the games in the Internet bars all day and all night. Many of them can't catch up with others in many subjects because of that.
Now the government has done many things. Some gangster Internet bars(黑网吧)have been banned. But that's not enough. The teachers and parents are still worrying about their students and children.
We can use computers and the Internet to learn more about the world. But at the same time, we should remember that computers and the Internet could not do all the things.
1.How was the first computers?
A.It was not big. | B.It couldn't work fast. | C.It was very cheap. | D.It was no useful |
2.When did people begin to use the Internet?
A.In the 19th century. | B.In the 1980s. | C.In the 1970s. | D.In the 1960s |
3.Which of the following is true?
A.Computers can help people do everything. |
B.Middle school students aren't allowed to use the Internet. |
C.Some students have used the Internet bars to make the “unreal friends”. |
D.computer isn’t good to students. |
4.Which is the best title of the passage?
A.Computers and the Internet. |
B.The Greatest Invention of This Century. |
C.Gangster Internet Bars. |
D.How to use the Internet |
5.What's the meaning of the word “that” in the fourth paragraph ?
A.Students often go into the Internet bars as soon as they are free. |
B.And they play the games in the Internet bars all day and all night. |
C.Students are so interested in making the “unreal friends” that they can't put their heart into study. |
D.All of above |
九年级英语阅读理解困难题查看答案及解析
Today almost everyone knows computers and the Internet . If I ask you "What is the most important in your life?", maybe you will say "Computers and the Internet."
The first computer was made in 1946. It was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster. What can computers do? A writer has said, "People can't live without computers today."
The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, write letters, do shopping, play computer games or make friends.
Many students like the Internet very much. They often go into the Internet as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don't know their real names, ages, and even sex(性别). They are so interested in making the "unreal friends" that they can't put their hearts into study. Many of them can't catch up with others on many subjects because of that.
We can use computers and the Internet to learn more about the world. But at the same time, we should remember that not all the things can be done by computers and the Internet.
1.When the first computer was invented, it was
A. small but worked quickly
B. large and worked quickly
C. large but worked slowly
2.The sentence "People can't live without computers today." means .
A. computers are the most important in people's life
B. people will die without computers today
C. computers can do all the things
3.The Internet came in about
A. 1961 B. 1971 C. 1981
4.Which of the following is TRUE?
A. Few students like going into the Internet.
B. Students use the Internet to make "unreal friends".
C. These "Unreal friends" often meet each other.
5.What does the writer think of the Internet?
A. It is helpful, but we can't do everything on it.
B. It can make students study harder.
C. It is not good for students.
九年级英语阅读理解中等难度题查看答案及解析
Today almost everyone knows computers and the Internet. If I ask you “what is the most important in your life?” maybe you will say “Computers and the Internet.”
The first computer was made in 1946. It was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster, What can computers do? A writer has said, “People can’t live without computers today.”
The Internet came a little later than computers. It is about twenty-five years later than computers. But now it can be found almost everywhere. We can use it to read books, write letters, do shopping, play games or make friends.
Many students like the Internet very much. They often go into the Internet as soon as they are free. They make friends on the Internet and maybe they have never seen these friends. They don’t know their real names, ages, and even sex(性别). They are so interested in making the “unreal friends “that they can’t put their hearts into study. Many of them can’t catch up with others in many subjects because of that.
We can use computers and the Internet to learn more about the world. But at the same time, we should remember that not all the things can be done by computers and the Internet.
1.The Internet can not be used for______.
A. studying
B. shopping
C. thinking
D. playing
2.When the computer was invented, it was______.
A. large and worked quickly
B. small and worked slowly
C. large but worked slowly
D. small but worked quickly
3.The Internet was born in about______.
A.1960 B. 1970 C. 1980 D.1985
4.Which of the following is true ?
A. Few students like going into the Internet.
B. Students use the Internet to make “unreal friends.”
C. These “unreal friends” often meet each other.
D. Students know the friends on the Internet very well.
5.What does the writer think of the Internet?
A. It is wonderful.
B. It can make students study harder.
C. It is not good for students.
D. It is helpful, but we can’t do everything on it.
九年级英语阅读理解困难题查看答案及解析
Today almost everyone knows computers and the Internet. If I ask you “What is the most important thing in your life?” Maybe you will say “Computers and the Internet”. The first computer was made in 1946. It was big but worked slowly. ________1.________ What can computers do? A writer once said, “People can’t live without computer today.”
The Internet is about twenty-five years later than computers. ________2.________ We can use it to read books, send e-mails, do some shopping, play games and make friends.
Young men, especially the high school students like the Internet very much. ________3.________ In the Internet bars, they make friends on the Internet and maybe they have never seen these friends. They don’t know their real names, ages and even sex(性别). ________4.________ Some of them play games in the Internet bars all day and night. Many of them can’t catch up with others in many subjects because of that.
Now the government has done many things. Some gangster bars(黑网吧) have been banned(取缔). ________5.________ The teachers and parents are still worried about these children.
We can use computers and the Internet to learn more about the world. But at the same time, we should remember that computers and the Internet could not do all the things.
阅读短文内容,把下面方框中的句子还原到短文中适当的位置。
九年级英语阅读理解中等难度题查看答案及解析