We always think that it’s OK for us to leave our plants home during our vacation as plants won’t scream like pets, right?
A recent study done by a group of scientists at the Tel Aviv University has discovered that some plants will scream when they are under stress.
The research was carried out on tomato plants and tobacco plants by cutting their stems(茎) and depriving(剥夺) them of water. A microphone was placed 10cm away from them. When their stems were cut, the plants started “screaming” between 20 and 100 kilohertz, and the scientists guess that this scream is probably meant to warn other plants nearby.
When the tomato plants’ stems were cut, 25 ultrasonic(超声的) pain sounds were recorded in an hour, and at the same time, 15 ultrasonic pain sounds were recorded from the tobacco plants. When they were deprived of water, the tomato plants recorded even more pain sounds with 35 pain sounds in an hour while the tobacco plants recorded about 11 pain sounds.
The plants also acted differently to different kinds of stresses. For example, the tobacco plants gave out a stronger “scream” when they were deprived of water than when their stems were cut. But plants that were in no immediate(立刻的)danger gave out less than one ultrasonic sound per hour.
The group of scientists said that plants are not as quiet as we had always thought, but in fact their voices are so high-pitched that we just can’t hear them.
Last year, another study has found out that plants feel pain when they are touched or hurt and they will give off a terrible smell.
1.What have the group of scientists at the Tel Aviv University discovered?
A.Some plants under stress will scream.
B.Plants in danger scream to warn others.
C.Some plants under stress feel energetic.
D.Plants in danger give off a sweet smell.
2.What was the microphone underlined in paragraph 3 used for?
A.Cutting the stems of plants. B.Depriving plants of water.
C.Collecting ultrasonic sounds. D.Testing different stresses.
3.How many ultrasonic pain sounds did the tobacco plants give out in an hour when deprived of water?
A.11. B.15. C.25. D.35.
4.What can we learn from the passage?
A.Tomato plants acted the same under different stresses.
B.Tobacco plants gave off a smell when they were safe.
C.Plants not in immediate danger screamed most weakly.
D.Plants that felt pain screamed loudly for people to hear.
九年级英语阅读单选困难题
We always think that it’s OK for us to leave our plants home during our vacation as plants won’t scream like pets, right?
A recent study done by a group of scientists at the Tel Aviv University has discovered that some plants will scream when they are under stress.
The research was carried out on tomato plants and tobacco plants by cutting their stems(茎) and depriving(剥夺) them of water. A microphone was placed 10cm away from them. When their stems were cut, the plants started “screaming” between 20 and 100 kilohertz, and the scientists guess that this scream is probably meant to warn other plants nearby.
When the tomato plants’ stems were cut, 25 ultrasonic(超声的) pain sounds were recorded in an hour, and at the same time, 15 ultrasonic pain sounds were recorded from the tobacco plants. When they were deprived of water, the tomato plants recorded even more pain sounds with 35 pain sounds in an hour while the tobacco plants recorded about 11 pain sounds.
The plants also acted differently to different kinds of stresses. For example, the tobacco plants gave out a stronger “scream” when they were deprived of water than when their stems were cut. But plants that were in no immediate(立刻的)danger gave out less than one ultrasonic sound per hour.
The group of scientists said that plants are not as quiet as we had always thought, but in fact their voices are so high-pitched that we just can’t hear them.
Last year, another study has found out that plants feel pain when they are touched or hurt and they will give off a terrible smell.
1.What have the group of scientists at the Tel Aviv University discovered?
A.Some plants under stress will scream.
B.Plants in danger scream to warn others.
C.Some plants under stress feel energetic.
D.Plants in danger give off a sweet smell.
2.What was the microphone underlined in paragraph 3 used for?
A.Cutting the stems of plants. B.Depriving plants of water.
C.Collecting ultrasonic sounds. D.Testing different stresses.
3.How many ultrasonic pain sounds did the tobacco plants give out in an hour when deprived of water?
A.11. B.15. C.25. D.35.
4.What can we learn from the passage?
A.Tomato plants acted the same under different stresses.
B.Tobacco plants gave off a smell when they were safe.
C.Plants not in immediate danger screamed most weakly.
D.Plants that felt pain screamed loudly for people to hear.
九年级英语阅读单选困难题查看答案及解析
My father told me that there used to be a forest near our town. But the farmer who owned the forest _________ trees every year until one year, there were no trees left.
One day, our teacher took us out and we had a _______ in the field where the forest used to be. While eating and drinking, we _______ about the beautiful forest we once had. One of my classmates comes from a tribe (部落) that lived in the west of our country. He told us what he thought about the change. “It makes me really _________ to learn that a forest has disappeared. My people have taught me to _________think seven generations (七代人) in the future. That’s to say, when we do something to the land, we should never _______it. We must care about nature and leave it good enough for later generations.
When we heard what he said, we kept _______first. "Let’s plant some trees!" said our teacher after a moment. “It will be a good _______!” So that’s what we did. For the rest of the spring, we worked hard and we planted thousands of trees.
That was five years ago. Today, when I stand in that field which was once empty, I see _______ about as tall as I am. It’s great to see how we’ve ________the field. It taught us the power of thinking about the future.
1.A.cut up B.cut down C.looked for D.looked after
2.A.picnic B.test C.wish D.lesson
3.A.planned B.feared C.knew D.talked
4.A.tired B.excited C.sad D.hopeful
5.A.sometimes B.always C.seldom D.never
6.A.protect B.hurt C.study D.sell
7.A.thankful B.happy C.silent D.shy
8.A.start B.mistake C.mess D.warning
9.A.trees B.leaves C.grass D.flowers
10.A.broken B.bought C.wasted D.changed
九年级英语完型填空中等难度题查看答案及解析
Let’s say you are taking a walk along the road and you happen to see one or two waste bottes lying on the grass beside the road. What would you do?
You may have different choices. Firstly, you can leave the bottles there as they are. It was not you who threw them away. Why should you do something about it? This is quite OK. Secondly, you can pick them up and throw them into a dustbin (垃圾箱). By doing this, you have walked a step further to help make our home clean. This action is a better choice. Thirdly, you might want to pick them up and give them to an old man or woman who collects waste for a living. If this is your choice, you have walked even further. You’re not only thinking about doing something for the environment, you’re also developing yourself to be a person who would think of others and help them.
As for young kids, they may always have such a question: “When do I grow up?" Yes! When does a child grow up? And how can a kid know he or she has grown up? These are interesting questions. As for us, fifteen-year-olds, who are finishing middle school, we’re no longer younger children. We should know whether or not we have grown up. When we start to have a sense of offering a helping hand for a cleaner city and greener world, and when we have a loving heart to think more of others than of ourselves and are ready to help them, we can say that we have grown up.
Remember: If we help others, others will help us. If we do our best for nature, nature will offer its best to us in return!
1.How did the writer start the passage?
The writer did it by giving a(n) ________of daily life.
2.How many choices are there in the second paragraph?
There are ________ choices.
3.What does it mean when you pick up the waste bottles and give them to someone else?
It is a sign that you’re a ________ person that has grown up.
4.What does the underlined word “home" refer to in the second paragraph?
It refers to the“________”we live in.
5.How did the writer support the main idea in the passage?
The writer used ________ as an example to support the idea.
九年级英语填空中等难度题查看答案及解析
Where I'm from, were pretty relaxed about time. We don't like to rush around, so we1.(mind)if people are a little late sometimes, If you tell a friend you're going to their house for dinner, it's OK if you arrive a bit late. We2.(real) enjoy our time slowly, We3.(valuable)the time we spend with our family and friends in our everyday lives. We often just drop by our friends' homes if we have time.4.(besides), we don't usually have to make plans to meet our friends. We often just walk around the town center, seeing as many of our friends as we can!
In Switzerland, it's very important5.(is) on time. We're the capital of clocks and watches, after all! If someone invites you to meet him or her at noon, then you 6.(expect) to be there at noon. If you're even 15 minutes late.7.(you) friend may get mad. So I make an8.(effort) to be on time when I meet my friends. I always leave the house early to avoid heavy traffic because I think it's impolite to keep others9.(wait). Also, we never visit a friend's house without calling10.(one). We almost always make plans to see friends. We usually plan to do something interesting, or go somewhere together.
九年级英语语法填空中等难度题查看答案及解析
People depend on plants. We use plants for food, cloth, shelter (住处), and even the air we breathe (呼吸).
Plants keep our air and water clean. Green plants give us oxygen (氧气). Oxygen is part of the air we breathe.
Plants are also part of the water cycle (水循环). Most of the water that a plant takes in goes back into the air.
Plants give us a lot of the food on the earth. Fruits, vegetables, and grains (谷物) come from plants. Without plants, we would not have bread, rice, carrots, apples, oranges, or bananas! Many people are growing plants to eat in their own gardens at home. Having your own garden helps the earth as well.
When you grow your own fruits and vegetables, you help cut down on pollution because big trucks don’t need to take your food to shops. You also help reduce the amount of rubbish because you don’t need to use bags for packing your food. You can just pick it out of the ground or off a plant and put it into a basket!
Trees are an important plant resource (资源). Trees provide wood to build homes and furniture. Trees are used to make lots of things around your home and at your school. And trees provide fruits that are good for you. Without trees, the earth would be a very different place.
1.________ is part of the air we breathe.
A.Sunlight B.Water C.Food D.Oxygen
2.What happens to most of the water that a plant takes in?
A.It goes back into the air. B.It stays in the plant.
C.It goes into the ground. D.It stays in the river.
3.What does the phrase “cut down on” mean in Paragraph 5?
A.Cause. B.Accept. C.Reduce. D.Expect.
4.What is the best title of the passage?
A.A Different Place B.The Uses of Plants
C.Food on the Earth D.Gardens at Home
5.You would find the passage in ________.
A.an interesting novel B.a book about animals
C.a popular play D.a book about nature
九年级英语阅读单选中等难度题查看答案及解析
Seventy percent of our planet is covered by one huge body of seawater-the ocean. In 2008, the United Nations recognized(确立) June 8 as World Oceans Day. It's a day to think about the important role that the oceans play in our lives, the dangers that our oceans are facing and the action we can take to protect them.
The ocean is home to the most of plants and animals on Earth. Plants in the sea provide us with 70 percent of O2 we breathe. The ocean controls our climate (气候), providing heat in winter and cool air in summer. It also provides us with food and medicine. No matter where you live on the planet, no matter how far from the sea, your life is dependent on the ocean.
The biggest problem facing the ocean at the moment is plastic pollution. Reducing single-use plastic, including plastic bags and plastic bottles, has been an important theme for World Oceans Day for a number of years.
Climate change and rising sea temperatures are also a huge problem. Rising sea temperatures have a direct influence on weather patterns and are seen as partly responsible for an increase in extreme (极端的) weather.
The day is celebrated in all kinds of ways, including special events on the beach, river clean-ups, school activities, art contests and film festivals. You can join in to remind people about the importance of our oceans and to make a difference.
1.What percent of our planet is covered with seawater?
A.30% B.40% C.70%
2.What is the main idea of Paragraph 2?
A.The ocean provides us with heat and cool air.
B.Our life is dependent on the ocean.
C.The ocean provides us with food and medicine
3.What is the biggest problem facing the ocean?
A.Plastic pollution. B.Reducing single-use plastic. C.Air pollution.
4.What is partly responsible for an increase of extreme weather?
A.Climate change. B.Rising sea temperatures. C.Weather patterns.
5.How do people celebrate World Oceans Day?
A.Eating out together. B.Having a meeting. C.Holding special events.
九年级英语阅读单选中等难度题查看答案及解析
Have you ever thought about how many different things you like? You may like pets, parties, presents, foods, and even superheroes! Our world is full of so many things to like!
Do you ever wonder (琢磨) why you like certain animals or why you like to do certain things? You may not think about it often, but you may learn something about yourself if you think twice.
For example, why do you like to play with cats more than dogs? Why do you like going to parties and playing games? Why do you like some sweets but not others?
Our personality helps form what we like and dislike. Sometimes the things we like just come naturally to us. For example, who’s your favourite superhero? You probably like that character (人物) for reasons that are all your own. You may not have even thought about why you like that superhero... you just do.
As you learn more and do more, you may find out that there are more and more things you like. That’s a good thing!
Do your friends like the same things that you do? Maybe you and your friends like different things. But it’s OK. What you like is part of what makes you you!
1.Our world is full of ________ to like.
2.You may ________ if you think twice.
3.Our personality helps form ________.
4.As you ________, you may find out that there are more and more things you like.
5.It’s OK if you and your friends ________.
九年级英语信息归纳中等难度题查看答案及解析
根据对话内容,从对话后的选项中选出能填入空白处的最佳选项,并在答题卡上将该项涂黑。
A: Good morning, Helen!
B: Good morning, Frank! We are leaving junior high school after the exams. I am very sad.
A: Me, too.
B: 1.
A: Mr. Brown. He was always patient with us.
B: Yes. He guided us to do a lot better in science. Do you have any other special memories?
A: 2. You all helped me to look for it.
B: I remember that. Our school life was unforgettable.
A: You are right. 3.
B: I hope to pass the exams to get into a good senior high school.
A: I believe in you because you are the most excellent in our class. 4.
B: Your plan is quite good. I think you’ll be successful. By the way, we’ll have a graduation party after the exams. 5.
A: Sure. It’s a moment we have a get-together.
B: That’ll be great.
A.But I’m going to an art school.
B.Which teacher will you miss the most?
C.Would you like to come?
D.I remember losing my schoolbag in Grade 7.
E.What do you hope to do after you graduate?
九年级英语补全对话5选5简单题查看答案及解析
Anger(愤怒)often makes us uncomfortable. Seeing your child's anger can be especially uncomfortable. In order to relieve(缓解)this feeling, parents often encourage children to “stop crying” and say things like “It's nothing to cry about.” It's moments like those that plant the seeds of unhealthy anger, The “stop crying” parents are just doing what they were taught by their own parents, who were probably taught that by their parents on and on. However, we should learn how to create healthy anger in our kids.
If a child never sees his or her parents express anger, he or she should never express anger, either. But if parents always express their anger loudly, their child may start to think of anger as something that is always frightening.
The first thing you can do to create healthy anger in your children is to practice creating healthy anger in yourself. Once you're better at experiencing anger and expressing it in a healthy way, you'll be able to set a good example for your kids.
Stopping kids from expressing their feelings is wrong. You may feel bad when you believe you are wrong, When children express their feelings and are told that it's nothing to cry about, they come to know that they themselves are bad.
We need to raise them in an environment where it's safe to express feelings. Once you feel more comfortable with your own anger, you can teach your children why anger is a helpful feeling. When your kids express anger, help them examine what it is that has made them angry. Why did it make them angry? How did it do that? Then, you can teach them that those feelings are never wrong and our expressions of feelings are in our control.
Anger is natural and normal, and it can be experienced and expressed in a healthy way.
1.Why do parents say “It's nothing to cry about” to their children?
A.To encourage them to stop crying. B.To make them uncomfortable.
C.To relieve their anger. D.To plant the seeds of unhealthy anger.
2.From the second paragraph we can infer(推断)___________.
A.parents have a great influence on their children B.parents should get angry with their children
C.expressing anger loudly is right, not wrong D.children should express their anger like their parents
3.Parents should set a good example for children by ___________.
A.stopping them from expressing their anger B.expressing their own anger in a healthy way
C.letting them know they are right or wrong D.raising them in a safe environment
4.The writer thinks that anger is a kind of feeling that is always ___________.
A.wrong B.uncomfortable C.harmful D.helpful
5.What's the main idea of the passage?
A.Anger often makes us and our children uncomfortable. B.Parents should create healthy anger in themselves.
C.Parents should create healthy anger in their kids. D.Parents should never express their anger.
九年级英语阅读单选中等难度题查看答案及解析
We'll finally grow up someday, leaving our parents and facing the challenges(挑战) in life. Parents may not be able to solve every problem for us. Instead, we should have enough life skills deal with the problems we will meet in the future.
This is what our country tries to do now: Helping more students get working spirit. To stress the importance of hardworking spirit education among students of different ages, a guideline (指导方针) came out recently. The guideline asks students to respect work. Students should learn basic life skills and form good working habits through such education.
According to a study of nearly 3,000 students in March, only 22% primary and middle school students help with everyday housework. Schools and families play an important role in teaching students about the importance of working hard, the guideline says.
Primary and middle school should provide students with hardworking spirit classes every week, according to the guideline. Schools can also hold activities to give students real-world work experience. For example, schools can teach children how to plant trees on Tree-Planting Day.
As children's first teachers, parents should also encourage children to learn how to do housework at home, so students can develop one or two life skills every year.
1.Why do we need enough life kills?
A.To leave our parents someday. B.To help ourselves grow up faster.
C.To solve problems in the future. D.To know the importance of hardworking.
2.What does the underlined word "stress” in Paragraph 2 mean?
A.施压 B.强调 C.减轻 D.影响
3.From the text, what can we learn from planting trees?
A.Real-world work experience. B.Important life skills.
C.Good working habits. D.Teamwork with others.
4.In which part of a magazine can we read the text?
A.Travel. B.Sports. C.Science. D.Education.
九年级英语阅读单选中等难度题查看答案及解析