Some inventions are so useful, but seem so simple, that we wonder why no one thought of them long ago. Post-it Notes, the pieces of paper that you can fasten almost anywhere and then remove without leaving any sign that they were there, are an example of such an invention.
Post-it Notes were invented about twenty years ago by Art Fry, a scientist at 3M Corporation. The idea for the product came from a frustrating experience he often had while singing in his church choir. Fry used pieces of paper as bookmarks to mark the places in his book of songs, but these bookmarks were always falling out. He knew he needed a bookmark that would stay where he put it, but that he could remove without damaging the pages.
Around that time, Fry heard about a new adhesive (粘合剂) that a workmate, Dr. Spence Silver, had created. This adhesive was special because it was sticky, but not too sticky. It was strong enough to hold papers together, but weak enough to not tear the paper when it was removed. Fry saw that the new adhesive could help solve his bookmark problem. One morning, Fry put some of the adhesive on the edge of a piece of paper. Just as he hoped, it made a perfect bookmark.
A short time later, Fry realized that his new invention had even more uses than being a great bookmark. He came to this realization when he wrote a note on one of his new "bookmarks" and attached it to a report he was going to give to a workmate. Soon, co-workers were asking Fry for more samples of his invention so that they could use the new type of notes themselves.
Fry and some other people at 3M believed so much in the new product that they persuaded the company to give away thousands of the "sticky pieces of paper" for trial use(试用). When some salespeople at 3M went to offices and showed workers just how helpful the new type of notes could be, they immediately received many orders. As more and more people discovered how useful Post-it Notes could be, the product took off.
1.The invention of Post-it Notes showed that Art Fry________.
A. had a lot of knowledge
B. was very hard-working
C. was good at creative thinking
D. loved his job in the church
2.In what way did Dr. Spence help Art Fry?
A. They worked together and often discussed science.
B. His invention of a special adhesive made Art's invention possible.
C. He advised 3M Corporation to give away lots of Post-it Notes for trial use.
D. He worked together with Art by providing the new adhesive for Art.
3.The underlined phrase "took off" means_______.
A. started to leave the ground
B. disappeared from the market
C. had even more uses
D. became popular very quickly
4.The biggest advantage of Post-it Notes is_______.
A. it can stay anywhere and leave no sign when removed
B. it is very cheap to use
C. it is good to write notes on
D. it is very thin and beautiful
九年级英语阅读理解困难题
Some inventions are so useful, but seem so simple, that we wonder why no one thought of them long ago. Post-it Notes, the pieces of paper that you can fasten almost anywhere and then remove without leaving any sign that they were there, are an example of such an invention.
Post-it Notes were invented about twenty years ago by Art Fry, a scientist at 3M Corporation. The idea for the product came from a frustrating experience he often had while singing in his church choir. Fry used pieces of paper as bookmarks to mark the places in his book of songs, but these bookmarks were always falling out. He knew he needed a bookmark that would stay where he put it, but that he could remove without damaging the pages.
Around that time, Fry heard about a new adhesive (粘合剂) that a workmate, Dr. Spence Silver, had created. This adhesive was special because it was sticky, but not too sticky. It was strong enough to hold papers together, but weak enough to not tear the paper when it was removed. Fry saw that the new adhesive could help solve his bookmark problem. One morning, Fry put some of the adhesive on the edge of a piece of paper. Just as he hoped, it made a perfect bookmark.
A short time later, Fry realized that his new invention had even more uses than being a great bookmark. He came to this realization when he wrote a note on one of his new "bookmarks" and attached it to a report he was going to give to a workmate. Soon, co-workers were asking Fry for more samples of his invention so that they could use the new type of notes themselves.
Fry and some other people at 3M believed so much in the new product that they persuaded the company to give away thousands of the "sticky pieces of paper" for trial use(试用). When some salespeople at 3M went to offices and showed workers just how helpful the new type of notes could be, they immediately received many orders. As more and more people discovered how useful Post-it Notes could be, the product took off.
1.The invention of Post-it Notes showed that Art Fry________.
A. had a lot of knowledge
B. was very hard-working
C. was good at creative thinking
D. loved his job in the church
2.In what way did Dr. Spence help Art Fry?
A. They worked together and often discussed science.
B. His invention of a special adhesive made Art's invention possible.
C. He advised 3M Corporation to give away lots of Post-it Notes for trial use.
D. He worked together with Art by providing the new adhesive for Art.
3.The underlined phrase "took off" means_______.
A. started to leave the ground
B. disappeared from the market
C. had even more uses
D. became popular very quickly
4.The biggest advantage of Post-it Notes is_______.
A. it can stay anywhere and leave no sign when removed
B. it is very cheap to use
C. it is good to write notes on
D. it is very thin and beautiful
九年级英语阅读理解困难题查看答案及解析
It seems that many stars are putting their fashion (时尚) skills to good use and some of them have succeeded in designing.
Avril Lavigne
“With a lot of designs, I try to tie in with some of my lyrics and more musical elements,” Lavigne said. Her product, named after a childhood nickname (绰号) from her father, was created three years ago, but Lavigne came up with the first idea for a clothing product when she was only 19 years old.
Victoria Beckham
Victoria created her own style of jeans for the clothing brand (品牌) Rock & Republic in 2004. Later, she created her own brand with the name DVB style and now she is more popular as a designer than as a singer.
Madonna
Pop queen Madonna created her fashion products in collaboration (合作) with the Swedish clothing company Hennes & Mauritz AB ( H&M) in 2007. She then collaborated with her daughter Lourders in creating 2010 juniors’ product for Macy’s called “ Material Girl”.
Jessica Simpson
Jessica Simpson created her own collection of jeans. She worked with the Camuto Group and Jones Apparel Group Inc.
Justin Timberlake
No one could imagine that Justin would become a fashion designer until he paired with his friend Trace Ayala to create the William Rast label. Their clothing is presented every season and attracts attention of Timberlake’s fans and models.
1.All of the people mentioned in the passage above are ________.
A. friends B. singers C. musicians D. stars
2.What does the underlined word “elements” mean in Chinese?
A. 器材 B. 天分 C. 要素 D. 染料
3.Which of the following is TRUE?
A. Victoria Beckham is not only a singer but also a designer.
B. Madonna once worked for Hennes & Mauritz AB.
C. Justin Timberlake had a talent for designing when he was a child.
D. Both Jessica Simpson and Madonna created their own jeans brands.
4.Which of the following is the main idea of the passage?
A. How to be a famous star. B. To be models is a hard work.
C. Working with others is important. D. Some stars have succeeded in designing.
九年级英语阅读理解困难题查看答案及解析
It seems that many stars are putting their fashion (时尚) skills to good use and some of them have succeeded in designing.
Avril Lavigne
“With a lot of designs, I try to tie in with some of my lyrics and more musical elements,” Lavigne said. Her product, named after a childhood nickname (绰号) from her father, was created three years ago, but Lavigne came up with the first idea for a clothing product when she was only 19 years old.
Victoria Beckham
Victoria created her own style of jeans for the clothing brand (品牌) Rock & Republic in 2004. Later, she created her own brand with the name DVB style and now she is more popular as a designer than as a singer.
Madonna
Pop queen Madonna created her fashion products in collaboration (合作) with the Swedish clothing company Hennes & Mauritz AB ( H&M) in 2007. She then collaborated with her daughter Lourders in creating 2010 juniors’ product for Macy’s called “ Material Girl”.
Jessica Simpson
Jessica Simpson created her own collection of jeans. She worked with the Camuto Group and Jones Apparel Group Inc.
Justin Timberlake
No one could imagine that Justin would become a fashion designer until he paired with his friend Trace Ayala to create the William Rast label. Their clothing is presented every season and attracts attention of Timberlake’s fans and models.
1.All of the people mentioned in the passage above are ________.
A. friends B. singers C. musicians D. stars
2.What does the underlined word “elements” mean in Chinese?
A. 器材 B. 天分 C. 要素 D. 染料
3.Which of the following is TRUE?
A. Victoria Beckham is not only a singer but also a designer.
B. Madonna once worked for Hennes & Mauritz AB.
C. Justin Timberlake had a talent for designing when he was a child.
D. Both Jessica Simpson and Madonna created their own jeans brands.
4.Which of the following is the main idea of the passage?
A. How to be a famous star. B. To be models is a hard work.
C. Working with others is important. D. Some stars have succeeded in designing.
九年级英语阅读单选困难题查看答案及解析
根据句意和汉语注释,写出单词的正确形式。
1.Nowadays, there are many useful things around us. But it’s a pity that we don’t know the names of the most ________ (发明者).
2.The coach__________ (保持不变) where he lay, unable to say a word.
3.He always has a lot of energy. I wonder what he does to keep himself in high _______(精神).
4.____________(对话) are supposed to take place between the family in a friendly way.
九年级英语单词拼写中等难度题查看答案及解析
Germs are very small living things. They are so small that we cannot see them unless we use a microscope. They are found in all kinds of places, all over the world. There are four main types of germs that they can invade (侵入) plants, animals and people, and sometimes they can make us sick.
Bacteria (细菌) live just about everywhere on earth. Not all bacteria are bad. Some of them are good for our bodies. They help us keep things in balance. Good bacteria live in our bodies and help us use the nutrients in the food we eat and make waste from what's left over. We couldn't make the most of a healthy meal without these important helper germs! On the other hand, there are several types of bad bacteria, including those that cause sore throats.
Viruses (病毒) need a host to keep living. They need to be inside a place of a living plant or animal, including humans, or even inside a bacterium! Whatever a virus lives in is called its host. Once a virus finds the perfect host, the goal is to reproduce and spread. Viruses are pretty tricky because they can change quickly to fit a new environment. When viruses get inside people's bodies, they can spread and make people sick.
Fungi (真菌) are kind of like plants. Unlike other plants, fungi cannot make their own food from soil, water, and air. Fungi love warm and wet places. Most fungi are harmless. The kind that can grow on your skin can be treated. It probably won't hurt you. But it really makes you uncomfortable!
Protozoa (原生动物) are extremely small. Most of them live in water. Some protozoa actually eat bacteria and they are good because they also eat the waste of other small living things. Some protozoa are bad, and they live off of other living things, sometimes humans. For example, if a person drinks unclean water, protozoa may cause health problems.
1.Are germs small?
____________________
2.How many germs are mentioned in the passage?
____________________
3.Why can viruses change quickly?
____________________
4.Where do fungi love to stay?
____________________
5.What does the passage mainly talk about?
____________________
九年级英语回答问题中等难度题查看答案及解析
We usually believe what our brain tells us, but there are some amazing facts which show that the brain tricks us. As a result, we think we can see something that is not actually there or we ignore(忽视)things that actually are there.
Scientists Daniel Simons and Christopher Chabris have researched this phenomenon(现象), which they call “change blindness”. Their experiments show how we sometimes just do not see what is in front of our eyes because .
Here is one of their most famous experiments. In this experiment, the participants(参与者)were shown a video of two groups of people (one group in white T-shirts and one group in black T-shirts) who passed basketballs around in a hallway. Each group had three members. Simons and Chabris asked the participants to count how many times the white team passed the ball. While the two teams were passing their balls around, a person dressed up as a big bear walked through the group and stopped to look at the camera. Simons and Chabris found that about half of the research participants did not notice the big bear.
1.What do Daniel Simons and Christopher Chabris do?
A. Scientists.
B. Astronauts.
C. Engineers.
D. Directors.
2.How many people did the experiment need in the video?
A. Three.
B. Four.
C. Six.
D. Seven.
3.What percentage of the participants noticed the big bear?
A. Less than 25%.
B. About 50%.
C. About 75%.
D. Almost 100%.
4.Which is the most suitable to complete the last sentence in the second paragraph?
A. we are not interested in it
B. we are too confident to see it
C. we are depending on other people
D. we are paying attention to watching something else
九年级英语阅读理解中等难度题查看答案及解析
In most situations, light helps us see. But nowadays humans are using so much light that it is in fact a kind of pollution.
When it comes to looking at the night sky, too much light makes it d1.for us to watch some of life’s most wonderful views: stars, planets and even galaxies(星系).
According to scientific research, about 2,500 stars can be seen by the human eye without u2.any special equipment(设备). But because of light pollution, you can only see 200 to 300 stars from today’s countryside, and no more than ten stars from a city. In most big c3., people can’t see the sky filled with stars like they die in their childhood.
Light pollution influences more than just our view of sky. The latest research s4.that lots of nighttime light can harm wildlife too.
When birds fly to a5.place over cities, they sometimes get lost by the brightness and fly in circles u6.they drop from tiredness. Sea turtles need dark beaches for laying eggs, but they can’t find their ideal places because of those bright lights.
Too much light at night m7.even influence human health, but scientists aren’t sure of that. They are still learning more.
In order to prevent things from going w8., governments and some organizations are working to reduce light pollution. Many cities and towns have taken action to reduce the use of lights at night. Lights are used only when and where they are r9. needed.
Hopefully, in the near f10., humans can enjoy the clear and beautiful sky again and all the wildlife will live a peaceful and undisturbed life too.
九年级英语回答问题困难题查看答案及解析
缺词填空
In most situations, light helps us see. But nowadays humans are using so much that it is in fact a kind of pollution.
When it comes to looking at the night sky, too much light makes it d________1.________ for us to watch some of life’s most wonderful views: stars, p________2.________ and even galaxies(星系).
According to scientific research, about 2, 500 stars can be seen by the human eye without u________3.________ any special equipment(设备). But because of light pollution, you can only see 200 to 300 stars from today’s countryside, and no more than ten stars from a city. In most big c________4., people cannot see the sky filled with stars like they did in their childhood.
Light pollution affects more than just our view of sky. Research s________5.________ that lots of nighttime light can harm wildlife, too.
When birds fly to a________6.________ place over cities, they sometimes get lost by the brightness and fly in circles(圈) u________7.________they drop from tiredness. Sea turtles need dark beaches for laying eggs, but they can’t find their ideal places because of those bright lights.
Too much light at night m________8.________ even affect human health, but scientists are not sure of that. They are still learning more.
In order to prevent things from going w________9., governments and some organizations are working to reduce light pollution. Many cities and towns have taken action to reduce the use of lights at night. Lights are used only when and where they are r________10.________ needed.
Hopefully, in the near future, humans can enjoy the clear and beautiful sky again and all the wildlife will live a peaceful and undisturbed life, too.
九年级英语其他题中等难度题查看答案及解析
Some Math problems are difficult for the students work out.
A. so, that B. not, but C. such, that D. too, to
九年级英语单项填空中等难度题查看答案及解析
Kids have invented all kinds of things that we use in our everyday lives,including earmuffs,the Popsicle,the trampoline and Braille!One of the earliest kid inventors was Benjamin Franklin.He invented swim flippers at the age of twelve.
About 500,000 kids invent things each year.Their inventions help make our lives easier and more interesting!
Let's celebrate the creativity of young people on K.I.D.!
What is it?
K.I.D.—Kid Inventors' Day
When is it?
It's celebrated on January 17th,the birthday of Benjamin Franklin.
Why is it celebrated?
To acknowledge(感谢) past and present achievements of kid inventors;to encourage the creativity of future kid inventors.
How can you celebrate it?
Read about it.Write about it.Start a young inventors' club.Enter a contest.Or,design your own invention!
1.Which of the following was invented by young Benjamin Franklin?
A. Earmuffs. B. Swim flippers.
C. Braille. D. The trampoline.
2.What does the writer think of kids' inventions?
A. Strange. B. Simple. C. Boring. D. Useful.
3.How many reasons are given to explain why we celebrate K.I.D.?
A. One. B. Two. C. Three. D. Four.
4.Which of the following is NOT mentioned as a way of celebrating K.I.D.?
A. Writing. B. Reading.
C. Visiting museums. D. Taking part in a contest.
5.The passage mainly tells us about ________.
A. some kid inventors
B. how to become a good young inventor
C. Kid Inventors' Day
D. the story of young Benjamin Franklin
九年级英语阅读单选困难题查看答案及解析