It has not been rainy for long. We can see the b__________of the river now.
九年级英语根据首字母填空中等难度题
It has not been rainy for long. We can see the b__________of the river now.
九年级英语根据首字母填空中等难度题查看答案及解析
The idea that red means stop and green means go has influenced our lives in more ways than just traffic signals(信号). We have been taught from a young age that the color red means danger and green means it's okay to move forward. But why were those colors chosen for traffic lights in the first place? For something we have to look at every day, why couldn't they have been prettier colors?
Well, it's important to know that before traffic lights for cars, there were traffic signals for trains. At first, railway companies used red to mean stop, white to mean go, and green to mean warn. As you could imagine, trains ran into a few problems with white meaning go. For example, one train mistook a bright star for a white light and something unexpected happened. Because of that, railway companies finally moved green meaning go and used yellow to mean warn. And it's been that way ever since.
Red has always been a color that meant danger, long before cars were even around. This most likely started because it's the color with the longest wavelength(波长) so it can be seen somewhere farther than other colors.
But, believe it or not, yellow was once used to mean stop. Back in the 1900s, some stop signs were yellow because it was too hard to see a red sign in a poorly lit area. Finally, highly reflective materials(高反射材料) were developed and red stop signs were born. Since yellow can be seen well at all times of the day, school zones, some traffic signs, and school buses continue to be painted yellow.
So next time you're impatiently waiting at a traffic light, don't get so mad at them, they've certainly come a long way.
What does the text mainly tell us?
A.How important traffic lights are.
B.Which color has the longest wavelength.
C.What red, yellow and green can be used for.
D.Why traffic lights are red, yellow and green.
九年级英语阅读单选中等难度题查看答案及解析
The longest river in the world is the Nile. It is 4,160 miles long. But the Nile is not the mightiest (浩荡的) river. The Amazon is. The Amazon is also the second longest river in the world. It is 3,900 miles long. How long is that? It is longer than a road going from New York City to San Francisco.
The Amazon is the mightiest for this reason. It has the greatest amount of water. More water runs out to sea than from the Nile. Mississippi, and Yangtze rivers combined. That's a lot of fresh water! The force of its current (水流) is great too. The current can be seen 200 miles out in the sea. There's a story to show the Amazon's amazing current. A ship sailed (航行) far away from Brazil. It ran out of drinking water. Another ship passed by. The first ship asked for water. Someone on the second ship said. "Just put your buckets (桶) into the sea."
Here are a few more facts. At its mouth, the Amazon is 90 miles wide. Even up the river, you can't see the opposite bank. The river is also very deep(from 22 to 76 meters). During rainy season, the river rises about 16 meters more. Big ocean ships can sail about 1,800 miles upstream (向上游). Smaller ships can sail 1,000 miles farther.
What's the most bloodthirsty fish in the world? No. It's not the shark. It's the Amazon's piranha. It is only about 10 cm to 20 cm long. It has sharp teeth. Thousands travel in a group. No animal can swim across the rivet. A 1,000-pound horse would be just bones (骨头) in three minutes. Are you planning a trip to the Amazon? Here's a piece of advice. Leave your swimsuit at home!
根据短文内容,选择最佳答案。
1.After reading this passage it seems clear that____________.
A.people do not drink the Amazon’s water
B.it would not be good to visit the Amazon during rainy season
C.sailing on the Amazon requires knowledge of its current
2.The writer helps you understand how long the Amazon is by___________.
A.telling how long the Nile is B.comparing it to a distance(距离)on land
C.comparing it with the Yangtze River
3.In Paragraph Four, the word“sharp”means“_________”in Chinese.
A.锋利的 B.急剧的 C.强烈的
4.The passage mainly tells us____________.
A.piranha in the Amazon B.traveling in the Amazon C.interesting facts about the Amazon
九年级英语阅读单选困难题查看答案及解析
In recent years, with the development of technology, many popular apps(应用程序)have been produced. These days, an app has caught great attention. It is Douyin, a video sharing app. Douyin first appeared in 2016. Now it is many people's favorite app, especially the young.
With Douyin, users can record videos, edit(编辑)them and share them online. It is very easy and interesting. We can share our videos with our friends with just a tap on the mobile phone screen. What's more, it's a great way to spend our free time by looking through those funny videos.
However, every coin has two sides. The app also has bad things. On the one hand, some people spend long hours on the app, which is harmful to their health. On the other hand, users can also find some bad things on the app. Such thing is unhealthy and unsuitable.
In my opinion, Douyin should check the videos before they are uploaded(上传)in order to keep a healthy environment for its users. Douyin is not good for teenagers. We should not use it too often.
Answer the questions according to the passage.
1.When did Douyin first appear in China?
2.Is Douyin a photo taking app?
3.Can we share our videos on the television or on the mobile phone screen?
4.Douyin is harmful to those people who spend long time on it, isn't it?
5.How does Douyin keep a healthy environment for its users?
九年级英语回答问题中等难度题查看答案及解析
In the last passage we've already talked about some dangerous plants, but we don’t want to give anyone the wrong idea. The truth is that some plants can hurt you, but most are completely harmless. In fact, there are plenty of plants that are actually very useful to humans.
That is why plants are so popular in Chinese medicine. Chinese medicine has been using plants for at least 4, 800 years. One of the most popular plants in Chinese medicine is ginseng(人参). Doctors of Chinese medicine believe that ginseng can help your lungs(肺), clean your blood and do many other thing. Ginseng also provides energy for people. In fact, many modern energy drinks that you see in stores have ginseng.
In some parts of U.S., there is a plant called lady fern(蹄盖蕨). This is the plant you need if you’ve been stung by a bee, or if you’ve got a small burn or a cut. Lady ferns are great for making your skin feel better. All you have to do is roll one of its leaves and make it into pieces in your hands. The juice inside the leaf will help your skin feel better.
If you’re hiking in Europe, look for a flower called tansy(艾菊). This yellow flower is a natural insects' enemy. You just rub it on your skin, and insects will leave you alone.
Sage(鼠尾草)is one of the most useful plants in the world. Because it has so many uses it's also quite valuable. Human beings have been using sage for a very long time. In Europe before fridges appeared, people used sage to keep food. Over the years, people have used sage to fight all kinds of health problems. Sage has been used to treat colds, stop muscle(肌肉)problems and reduce(减少) swelling. In fact, sage comes from the Latin word “salvere”, which means “to be saved”.
1.How many kinds of useful plants are mentioned in the passage?
A.2 B.3 C.4 D.5
2.Which of the following about ginseng is NOT TRUE?
A.It's still being used in Chinese medicine.
B.It can make people feel sleepy.
C.It can be found in many modern energy drinks.
D.It is helpful to our lungs and blood.
3.Lady ferns can make your ________feel better.
A.Skin B.muscle C.burn D.cut
4.What does the passage say about sage?
A.It's the most useful plant in the world. B.It hasn’t been used by people for long.
C.It was once used to keep food in Europe. D.Its name comes from a German word.
5.What can be the best title for this passage?
A.How to protect plants B.Some harmful plants
C.How to grow plants D.Some useful plants
九年级英语阅读单选中等难度题查看答案及解析
Have you ever seen a solar panel(太阳能电池板)in your neighborhood? Solar panels take energy from the sun and turn it into electricity. Over the past ten years, the price of solar panels has gone down greatly. In many parts of the world, solar energy is now the cheapest form of electricity. More and more people have started using solar energy to power(给……供电)their homes.
However, solar panels also have their problems. They stop working at night and on rainy days. Is it possible to make them produce electricity all of the time?
Scientists at Suzhou University, China, have invented a new solar panel now. It can produce electricity not only from solar energy but also from falling rain. When a raindrop falls on the solar panel and then rolls(滚动)down, it creates friction(摩擦力)on the surface of the panel, which can then be turned into electricity.
Sun Baoquan is one of the inventors. “Our new invention can produce electricity in any weather during the day,” he says. “It can even provide electricity at night if there is rain.”
The solar panel, however, does not make much electricity from falling rain. So Sun Baoquan is still working hard to improve it. The scientist also wants to make solar panels more flexible, which are as soft as clothing.
The field of solar energy is developing fast. Scientists around the world have been improving solar panels. Some have been working on ways to join solar panels and wind power together. Some have been trying to use sunlight to produce liquid and gas fuels(液体和气体燃料).
1.Which energy is now the cheapest form of electricity in many parts of the world?
A.Solar energy. B.Water energy. C.Wind energy.
2.What is one of the problems of common solar panels?
A.The price of them is rising.
B.They can’t work all of the time.
C.They can hardly power people’s homes.
3.Why is the new solar panel more scientific and useful?
A.It has a larger size than a common one.
B.It produces more electricity from falling rain than solar energy.
C.It can produce electricity day and night and even in rainy conditions.
4.What does the underlined word “flexible” mean in Paragraph 5?
A.柔软的 B.光滑的 C.坚硬的
5.We can infer(推断)from this text that ________.
A.there is no room for developing solar energy
B.there is no end to the research in the field of solar energy
C.solar energy has completely taken the place of other kinds of energy
九年级英语阅读单选中等难度题查看答案及解析
How would you feel if moving to a new town meant losing track of your friends? What if the only way of getting news from faraway friends was writing letters that took ages to be delivered(递送)? This was how things worked not very long ago. Thanks to advances in technology, how we make friends and communicate with them has changed greatly.
Nowadays, we can move around the world and still stay in touch with our friends. Social media tools(社交媒体工具) let us see what our friends are busy with and maintain friendships.
The digital (数字)age also enables us to find people who share our interests. Whatever our hobbies, the Internet can connect us with others who also enjoy doing them, even if they live on the other side of the world.
But when you friend people online, does this mean that they really are your friends? It depends.
If people always exchange true personal information online, then yes, these friendships can be real and meaningful. But we need to remember that what we see on social media is often not the whole truth about a person. Sometimes smiling photos can hide real problems. On the Internet, nobody knows you're a dog. A young person could be old;a woman could be a man;we could even be sharing our information with criminals.
But this doesn't mean that we should throw the baby out with the bathwater. Although technology has changed the way we acquire(获得)friends, the meaning of friendship and our longing for friends remain the same. As Aristotle said, no one would choose to live without friends, even if he had all other goods.
1.Ways of making friends and communicating with them have changed greatly because of ________.
2.To stay in touch with our faraway friends, we can ________.
3.Online friendships can be real and meaningful if people ________ with each other.
4.The phrase “throw the baby out with the bathwater” means “________” in Chinese.
5.This passage mainly talks about ________ of making friends online.
九年级英语多任务混合问题中等难度题查看答案及解析
When we were little kids, we knew about traffic lights. The color red means stop, the color green means go and the color yellow means slow down or show some caution (小心). But why are these colors used for traffic lights? Why couldn't they be colors like blue, brown or orange? Here is the history of the colors for traffic lights.
Well, it's important to know that before there were traffic lights for cars, there were traffic signals (信号) for trains. At first, railway companies used red to mean stop, white to mean go and green to mean caution. But train drivers had a few problems with the color white meaning go. They could easily mistake stars at night for the signal to go. So railway companies moved to the color green to mean go, and the color yellow to mean caution.
The color red has a lot to do with danger. Red is the color with the longest wavelength (波长), so it can be seen from a greater distance than other colors. The color yellow is used to mean caution because it has a little shorter wavelength than red, but not as short as green.
Believe it or not, yellow was once used to mean stop. Back in the 1900s, some stop signs were yellow because they were easier to see in poorly-lit areas. But people once again used red to mean stop after more highly reflective (反光) materials were developed. Since yellow can be seen well at all times of the day, school zones and school buses continue to be painted yellow.
Traffic lights really came a long way.
From: https: //www.rd.com
1.The earliest traffic signals were for trains.
2.The color blue was once in early traffic signals.
3.The color green can be seen from a greater distance than other colors.
4.Back in the 1900s, yellow was used to mean stop.
5.School buses are painted yellow because this color can be seen at all times of the day.
九年级英语阅读判断中等难度题查看答案及解析
Antarctica (南极洲) is the coldest, driest and windiest place on our planet. What would it be like to live and work there? On Oct. 15th, 2019, 50 Chinese scientists set sail from Shenzhen, heading for Antarctica. This was our country's 36th Antarctic expedition. The ship, Xuelong 2, is the first icebreaker made in China. Xuelong 2 is one of the world's best research icebreakers.
It can sail to any place around the world in one trip without refueling (加燃料). It can work in temperatures as low as -30%℃. It is the first in the world to use two-way ice-breaking technology, which means that it can break the ice while moving forward or backward.
Because of Antarctica's special environment, scientists from around the world have been there to do studies for many years. The study of Antarctica's geology (地质) is also important. Rock in Antarctica can tell scientists what the weather was like a long time ago. And they can help scientists understand how the earth has changed over time. There are also many wild animals, such as penguins and seals. Scientists can learn how animals live in cold places by studying them.
As we all know, life in Antarctica is not easy-it's cold and sometimes dangerous. But scientists say it's still quite fun. For example, some scientists study how penguins walk, what they eat and why they move from one place to another. They are excited to see the cute animals playing around. They hope their studies can help protect them.
Xuelong 2 finished its tasks and returned to Shanghai on April 22, 2020.
1.How many Chinese scientists headed for Antarctica on Oct 15th, 2019?
A.Fifteen. B.Nineteen. C.Fifty. D.Two hundred.
2.Xuelong 2 is ______.
A.the first icebreaker made in the world
B.the first in the world to use two-way ice-breaking technology
C.one of the best research icebreakers in China
D.the second icebreaker made in China
3.According to Paragraph 3, scientists study ______ in Antarctica.
A.how the weather has changed B.the geology and wild animals
C.the original plants D.how the rock disappeared
4.Which of the following best describes scientists’ life in Antarctica?
A.Not easy but still quite fun. B.Dangerous and boring.
C.Hard and dangerous. D.Safe but quite tiring.
九年级英语阅读单选中等难度题查看答案及解析
In 1981, the Chinese women's volleyball team first stood on the top at the World Cup. And in 2019, it defended(保住)its World Cup crown with a record of 11 wins. The women's volleyball team has been the pride of the Chinese people. To honor it, a film named Zhongguo Nvpai or Leap in English has been made.
Based on the volleyball team's stories, the film shows the struggles(奋斗)and achievements of the Chinese women's volleyball team over the past 40 years. Gong Li, a world-famous Chinese actress, plays the role of Lang Ping, who has won the world championships many times with the team and is now the team's head coach. In order to play the role well, Gong came to the training site of the team, observing Lang's words and deeds carefully.
Zhu Ting, captain of the Chinese women's volleyball team, also plays a part in the film. It is the first time that she has taken part in a film shooting and she says it's a little bit difficult. However, her playing volleyball is more difficult than being an actress. It took her at least 10 years to rise to fame in the field but playing herself in the film could be realized in a short time.
The film hit the screen in January, 2020. The Chinese women's volleyball team not only is a competitive sports team but also shows the spirit of struggling and never giving up.
1.The underlined word “observe" in Paragraph 2 most probably means ____________.
A.listen to B.learn C.understand D.watch
2.What is mentioned about Zhu Ting?
A.She thinks it's easy to be an actress. B.She has led the team to win many prizes.
C.It took long for her to become famous. D.She once played a part in a film.
3.What can we learn from the Chinese women's volleyball team?
A.Keep on fighting. B.Fight for the first. C.Learn from mistakes. D.Seeing is believing.
4.The passage is written in a/an ____________ tone (语气).
A.serious B.excited C.humorous D.proud
九年级英语阅读单选中等难度题查看答案及解析