When we see babies or pets, we can't help gently touching them to show our love. And they give us happy feelings back. But a recent study shows that it’s different for plants.
A study, published in The Plant Journal, shows that plants don’t like to be touched. That’s because touching changes their genes(基因) and, even worse, can slow their growth. Professor Jim Whelan in Australia gave an explanation. The lightest touch from a human, animal, insect, or even plants touching each other in the wind, leads to a huge gene change in the plant.
In order to test the theory, the scientists did an experiment on plants. They grew a number of plants to the age of four weeks. Then they touched them with a paintbrush every 12 hours over a 36-hour period. They found that as the result of the touch, the mitochondria(线粒体) in the plants had been partly destroyed. The mitochondria are the “power-house” of the cell(细胞). The mitochondria produce energy for the cells in both animals and plants. If this “power-house” is weakened, the plants will lose a large amount of energy that should have supported their growth.
Whelan further explained, “If the touching is repeated, then plant growth is reduced by 30 percent.” Although the touching does have a strong influence on plants, usually the plants can still be alive. Touching changes the plants, but it’s not always a bad change. Continually touching or moving plants will make them grow shorter than other ones. However, in some ways, this change could be helpful. It may help plants fight threats to their health such as insects and bad weather.
The new research findings have led to a deeper understanding of the plants. And the research might help with the growth of plants.
根据材料内容选出最佳答案。
1.According to the article, what can get in the way of plants’ growth?
A.Love. B.Touch. C.Water. D.Weather.
2.How do the mitochondria support the plants’ growth?
A.By providing energy for cells. B.By changing the plants’ genes.
C.By fighting against the insects. D.By reducing the amount of cells.
3.Why did the scientists do the experiment?
A.To explain why pets love to be touched.
B.To find out why some plants grow more slowly.
C.To test if touching can change the genes of plants.
D.To show that plants’ and animals’ genes are different.
4.What does the underlined word “threats” mean in Chinese?
A.因素 B.改变 C.威胁 D.对手
5.What can we learn from the text?
A.Touching can have a good influence on plants’ growth.
B.We’re not sure how to help plants grow by touching.
C.It’s necessary to avoid touching the plants all the time.
D.The changes of the plants by touching may be not bad.
九年级英语阅读单选简单题
When we see babies or pets, we can't help gently touching them to show our love. And they give us happy feelings back. But a recent study shows that it’s different for plants.
A study, published in The Plant Journal, shows that plants don’t like to be touched. That’s because touching changes their genes(基因) and, even worse, can slow their growth. Professor Jim Whelan in Australia gave an explanation. The lightest touch from a human, animal, insect, or even plants touching each other in the wind, leads to a huge gene change in the plant.
In order to test the theory, the scientists did an experiment on plants. They grew a number of plants to the age of four weeks. Then they touched them with a paintbrush every 12 hours over a 36-hour period. They found that as the result of the touch, the mitochondria(线粒体) in the plants had been partly destroyed. The mitochondria are the “power-house” of the cell(细胞). The mitochondria produce energy for the cells in both animals and plants. If this “power-house” is weakened, the plants will lose a large amount of energy that should have supported their growth.
Whelan further explained, “If the touching is repeated, then plant growth is reduced by 30 percent.” Although the touching does have a strong influence on plants, usually the plants can still be alive. Touching changes the plants, but it’s not always a bad change. Continually touching or moving plants will make them grow shorter than other ones. However, in some ways, this change could be helpful. It may help plants fight threats to their health such as insects and bad weather.
The new research findings have led to a deeper understanding of the plants. And the research might help with the growth of plants.
根据材料内容选出最佳答案。
1.According to the article, what can get in the way of plants’ growth?
A.Love. B.Touch. C.Water. D.Weather.
2.How do the mitochondria support the plants’ growth?
A.By providing energy for cells. B.By changing the plants’ genes.
C.By fighting against the insects. D.By reducing the amount of cells.
3.Why did the scientists do the experiment?
A.To explain why pets love to be touched.
B.To find out why some plants grow more slowly.
C.To test if touching can change the genes of plants.
D.To show that plants’ and animals’ genes are different.
4.What does the underlined word “threats” mean in Chinese?
A.因素 B.改变 C.威胁 D.对手
5.What can we learn from the text?
A.Touching can have a good influence on plants’ growth.
B.We’re not sure how to help plants grow by touching.
C.It’s necessary to avoid touching the plants all the time.
D.The changes of the plants by touching may be not bad.
九年级英语阅读单选简单题查看答案及解析
任务型阅读，阅读下面短文，根据短文内容完成句子。
When we watch a football match or see a film， we often see people put out their fingers to form a “V”. Perhaps you don't know what it means and how it gets the meaning. Here is a story to answer the question.
During the Second World War， there was a Belgian(比利时)young people. He called himself Victor. He ran to England and worked for a radio station in London. He spoke to his country in his programmers every day in a hope that it could help his people win the war. One day at the end of 1940， he asked his people to write the letter “V” to show their strong wish to win the victory.
During that night， the letter “V” was seen on the walls， trees， buildings and other places. This encouraged hundreds of thousands of people in this country.
1.We often see people form a “V” with ________ when they watch a football match.
2.The Belgian young man worked ________ in London.
3.He hoped that his speech could help his people ________.
4.From the story we know that the letter “V” means________.
5.The story happened nearly ____ years ago.
九年级英语其他题中等难度题查看答案及解析
If you want to see a thing well, touching can help you to “see” it better. Your eyes can tell you that a glass ball is round. But by holding it in your hands, you can feel how smooth and cool the ball is. You can feel how heavy the glass ball is. When you learn all these about the ball, you really see it well. With your skin, you can feel better. For example, your fingers can tell the differences between two different coins in your pocket. You can feel a little drop of water on the back of your hand, too. You can even feel sounds against your skin. Have you ever wanted to know why some people like very loud music？They must like to feel the sounds of music. All children soon learn what “Don't touch！” means. They hear it often. Yet most of us keep on touching things as we grow up. In shops, we touch things that we might buy. To see something well, we have to touch it. The bottoms of our feet can feel things, too. You know this when you walk on warm sand, cool grass or hard floor. All feel different under your feet.
Most museums are just for looking. But today some museums have some things to touch. Their signs say, “Do touch！” There you can feel everything on show. There are ways of learning to see well by feeling. One way is to close your eyes and try to feel everything that is touching your skin. Feel the shoes on your feet, the clothes on your body and the air on your skin. If you want to see better, reach out and touch. Then you will really see!
1.The underlined word “these” in Paragraph 1 refers to ________．
A.a round glass ball
B.a smooth and cool glass ball
C.a smooth, cool and heavy glass ball
D.a round, smooth, cool and heavy glass ball
2.By touching things, you can ________．
A.have a strange feeling B.know how to reach out your hands
C.tell the differences between them D.tell what colors they really are
3.When people buy things in shops, what do they often do?
A.Try them on first. B.Put their right hands on them.
C.Just have a look. D.Feel and touch them.
4.Which of the following is NOT TRUE?
A.People don't have to learn to touch.
B.Our skin may help us enjoy music.
C.By touching things, we can learn more about them.
D.Most people touch things to see them well.
5.What is the best title for the text?
A.Feeling by Seeing B.To See or to Feel
C.To See Better—Touch D.Ways of Touching
九年级英语阅读单选困难题查看答案及解析
If you want to see a thing well, touching can help you to “see” it better. Your eyes can tell you that a glass ball is round. But by holding it in your hands, you can feel how smooth and cool the ball is. You can feel how heavy the glass ball is. When you learn all these about the ball, you really see it well. With your skin, you can feel better. For example, your fingers can tell the differences between two different coins in your pocket. You can feel a little drop of water on the back of your hand, too. You can even feel sounds against your skin. Have you ever wanted to know why some people like very loud music？They must like to feel the sounds of music. All children soon learn what “Don't touch！” means. They hear it often. Yet most of us keep on touching things as we grow up. In shops, we touch things that we might buy. To see something well, we have to touch it. The bottoms of our feet can feel things, too. You know this when you walk on warm sand, cool grass or hard floor. All feel different under your feet.
Most museums are just for looking. But today some museums have some things to touch. Their signs say, “Do touch！” There you can feel everything on show. There are ways of learning to see well by feeling. One way is to close your eyes and try to feel everything that is touching your skin. Feel the shoes on your feet, the clothes on your body and the air on your skin. If you want to see better, reach out and touch. Then you will really see!
1.The underlined word “these” in Paragraph 1 refers to ________．
A. a round glass ball
B. a smooth and cool glass ball
C. a smooth, cool and heavy glass ball
D. a round, smooth, cool and heavy glass ball
2.By touching things, you can ________．
A. have a strange feeling B. know how to reach out your hands
C. tell the differences between them D. tell what colors they really are
3.When people buy things in shops, what do they often do?
A. Try them on first. B. Put their right hands on them.
C. Just have a look. D. Feel and touch them.
4.Which of the following is NOT TRUE?
A. People don't have to learn to touch.
B. Our skin may help us enjoy music.
C. By touching things, we can learn more about them.
D. Most people touch things to see them well.
5.What is the best title for the text?
A. Feeling by Seeing B. To See or to Feel
C. To See Better—Touch D. Ways of Touching
九年级英语阅读理解极难题查看答案及解析
Many pet owners see their pets as family members. However，when they have to go away on business or for some other reasons，and cannot take their pets along，they feel guilty about it and wish they could do something for their deeply loved pets. The Pet Hotel is set up especially for this reason.
What do we offer?
The Pet Hotel offers pets large rooms and the latest equipment（设备）.Like other hotel rooms，we offer color TVs，suitable beds，sofas and other pieces of furniture for pets.
We prepare great food for the little guests，walk them at least twice a day，and provide them with all kinds of amusements（娱乐活动）. In addition，we brush and clean pets. To make pets feel at home，we play the sort of music which is often played at their homes and turn the TV to the pets’ favorite channels. Pets will surely feel comfortable in our hotel!
We also have video cameras in each room so that owners can check online twenty-four hours a day to make sure that the pets are having a good time at the hotel. We also have phones so that pet owners can call their pets and talk to them every day.
How much does It cost?
The prices change according to the size of the rooms. A regular room with standard service costs 1,500 dollars.
1.Pet owners send their pets to the Pet Hotel probably because they ．
A．treat pets as their close friends
B．can't take pets along on business
C．are not happy with their own pets
D．Want to send their pets to others
2.The Pet Hotel provides pets with ．
A．magazines and sofas B．color TVs and toys
C．beds and magazines D．color TVs and beds
3.In the Pet Hotel，pets can ．
A．take photos for their owners
B．enjoy their favorite TV programs
C．brush and clean themselves
D．book rooms according to their size
九年级英语阅读理解中等难度题查看答案及解析
It’s common for a child to lose his or her baby tooth during the growth. What do children do when they lose baby teeth? People around the world do it differently.
A custom in the US, England, Canada, Australia and some other English-speaking countries is that children put their baby tooth under their pillow (枕头) before going to bed. They believe the tooth fairy(牙仙子) comes during the night and leave a coin in exchange for their tooth. Of course, we know that the money is not from the tooth fairy. Their parents do it instead.
In some European countries it is a common practice to bury the baby tooth in the earth. The tooth might be buried in the garden or in the surrounding field. However, since most of the people now find themselves living in towns or cities, they begin placing the teeth in small flowerpots. It’s done so that the permanent(永久的) tooth will grow in its place.
Putting a tooth under a pillow sounds sweet, and putting a tooth under the ground or in a flowerpot sounds safe, but what about throwing those teeth around? In some Asian countries, that’s just what people do. Children throw a lower tooth up onto the roof and an upper one is thrown down on the ground, or hidden under the bed. It is done so that the new upper tooth grows downwards, while the new lower tooth upwards.
Some countries even have more interesting traditions. In Nigeria, if you’re a boy, you hold your tooth and eight stones in your fist(拳头). Girls hold six stones and their tooth in their fist. The children then close their eyes and state their names. They then say, “Oh, I want my tooth back!” Next, they throw everything in their fist up in the air and run away as fast as they can. In Mongolia, the baby tooth is given to a young dog. There, the dog is respected and considered to be able to protect people. If the dog likes the baby tooth and eats it, it’s said that a strong tooth will grow again
1.How many different traditions about the baby tooth are mentioned in the passage?
A. Four. B. Five. C. Six. D. Seven.
2.Why do people in Asia throw their baby teeth around in different ways?
A. Because it means nothing but it is only a tradition.
B. Because they think that the teeth are useless to them.
C. Because they have no other places to store these teeth.
D. Because they expect their new teeth to grow in a correct way
3.Which of the following is NOT true according to the passage?
A. A kid in UK hides his baby tooth under a pillow to get some money.
B. People in Europe usually bury their baby teeth in different places.
C. In Nigeria, boys and girls like games with their baby teeth
D. In Mongolia, people think dogs can help them to have strong teeth to grow.
4.What does the passage mainly want to tell us?
A. There are different traditions to do with the baby tooth in the world
B. The baby tooth means something different to people in different countries.
C. When children lose baby teeth, they like to do some different things with them.
D. Most children in the world hope to have stronger teeth when they lose baby teeth.
九年级英语阅读单选中等难度题查看答案及解析
It was the first day of school. I stood up to look around when a gentle hand touched my shoulder. I turned around to find a little old lady smiling at me.
She said, “Hi handsome. My name is Rose. I’m eighty-seven years old. Can I give you a hug?”
I laughed, enthusiastically responding, “Of course!” And she gave me a giant squeeze. “Why are you in college at such an age?” I asked.
“I’m here to meet a rich husband, get married, have children, and then retire and travel.”
“No seriously.”
“I always dreamed of having a college education and now I’m getting one!”
We became instant friends. Over the course of the year, Rose made friends wherever she went. She loved to dress up and she took great delight in the attention given to her from the other students. She was living it up. At the end of the term we invited Rose to speak at our football banquet (宴会) and I’ll never forget what she taught us.
As she began to deliver her prepared speech, she dropped her note card on the floor. A little embarrassed she simply said, “I’m sorry. This whiskey is killing me! I’ll never get my speech back in order so let me just tell you what I know.” As we laughed, she cleared her throat and began: “We do not stop playing because we are old; we grow old because we stop playing; There are only four secrets to staying young, being happy and achieving success. You have to laugh and find humor every day. You have got to have a dream. When you lose your dreams, you die. We have so many people walking around who are dead and don’t even know it! There is a huge difference between growing older and growing up. If you are nineteen years old and lie in bed for one full year and don’t do one productive thing, you will turn twenty years old. Anyone can grow older. That doesn’t take any talent or ability. The idea is to grow up by always finding the opportunity in change. Have no regrets. The elderly usually don’t have regrets for what we did, but rather for things we did not do.”
At the year’s end Rose finished the college degree. One week after graduation Rose died peacefully in her sleep. Over two thousand college students attended her funeral(葬礼) to honor the wonderful woman.
1.While meeting Rose at the college for the first time, the author was curious about
________.
A. her age B. her dream C. her life D. her motivation
2.The underlined sentence “She was living it up” in the text most probably means
________.
A. she did as well as she was expected
B. she spent much money in her college life
C. she did things that she enjoyed
D. she deserved(应得) praise due to her study
3.In Rose’s opinion, one can learn to grow up by __________.
A. getting new ideas
B. regretting his mistakes
C. gaining new knowledge every day
D. finding chances to do productive things
4.What else did Rose most probably say at the football banquet?
A. “It seems my young days are over.”
B. “The only people who fear death are those with regrets.”
C. “When we are old, we can’t do anything. So enjoy in time!”
D. “Have a good time and don’t do much in order to stay young.”
5.The story of Rose in the text shows that __________.
A. it is never too late to learn in your life.
B. it is good for old people to have friendship.
C. it is never too late to be all you can possibly be.
D. it is very important to have a healthy body when people are old.
九年级英语阅读理解困难题查看答案及解析
----What will happen if the forests ______ forever ?
----We can’t see any valuable animals or plants any longer.
A. appear B. disappear C. wound D. plant
九年级英语单选题中等难度题查看答案及解析
—Can you see ______ ?
—No. Let’s go and have a look. Maybe we can help them.
A. what are they doing there
B. why are they talking there
C. what is happening there
D. what are they talking about
九年级英语单项填空中等难度题查看答案及解析
－Can you see ________?
－No. Let’s go and have a look. Maybe we can help them.
A. what was happening there B. what are they doing there
C. what are they talking there D. what is happening there
九年级英语单项填空中等难度题查看答案及解析