If you watched the 2018 Winter Olympics, then...

If you watched the 2018 Winter Olympics, then you might have noticed the suits that the athletes wore. Have you ever wondered why they look so unique? Besides making the athletes look stylish, the suits can also help them move faster. This is especially true for speed skaters.

Wave your hand around in the air. You might feel some air moving around your hand, but you probably don’t think that it can slow your hand down. But if you wave your hand around in some water, you can feel that it is not easy to move your hand. This is called drag (阻力). Air has less drag than water, but it can affect your speed.

Speed skaters wear suits that reduce drag. The suit makes the surface of their body smooth. This way, the air moves more easily over their body and there is less drag.

The US speed skating team’s suits were made out of a white nylon-spandex (尼龙氨纶) mix called H1. When we move, we leave a vacuum (真空) hole of air behind us that can slow us down. Speed skaters need to make it as small as possible. The H1 fabric (织物) can help with this. The fabric makes the airflow behind moving objects more steady and therefore makes the hole smaller, Wired magazine reported.

The H1 fabric was used for the arms and legs of the team’s suits. That’s because human arms and legs move more and feel more drag.

Wearing high-tech suits might not decide the final victor in a competition. But the suits give athletes the best tool to do their job.

1.What was the main goal in making the speed skaters’ suits?

A.To make them stylish. B.To reduce drag.

C.To help the body relax. D.To make air move slowly.

2.What does the underlined word “it” in Paragraph 4 refer to??

A.A white nylon-spandex mix. B.The H1 fabric.

C.A vacuum hole of air. D.The airflow.

3.Which of the following is TRUE according to the passage?

A.A special suit is a tool for athletes to do their job.

B.The H1 fabric is made out of cotton.

C.The H1 fabric was used to make the entirety of the suits.

D.Water has less drag than air.

4.What would be the best title for the passage?

A.Skaters in Competitions B.Changes Happening in Suits

C.Ways of Changing Suits D.High-tech Suits for Skaters

九年级英语阅读单选困难题查看答案及解析

—Have you heard the 2022 Winter Olympics ________ in Beijing?

—Yes. I have. That is a wonderful chance for the world to know more about China.

A.held B.are held C.were held D.will be held

九年级英语单选题简单题查看答案及解析

There are some very good inventions which, for one reason or another, don't become popular. These inventions should be better known, even though I think that some of them are crazy. Let's have a look at some of these inventions and see if you agree that they should be more successful.

The Australians had a great idea to stop people from drinking and driving. The idea was that if a driver wanted to start the car, she or he would have to blow into a bag first. If there was too much alcohol (酒精) in their breath. The car wouldn't start. It sounds like a great idea to me, but people said that they might need to drive the car in an emergency (紧急情况) even if they had drunk too much alcohol. Another idea I liked was an invention by a scientist who thought his children watched too much TV. He connected the TV to an exercise bike so that the electricity to power the TV was produced by the bike. If the children wanted to watch a lot of TV, they had to pedal (踩踏) very hard.

One of the strangest inventions I have come across is a bicycle which can cross rivers! The idea was that when you came to a river, you could inflate (充气) a huge plastic ball all around the bike. You would then get into the ball which would float on the river while you pedaled the bike inside the ball! Why not use a bridge instead?

One thing I would like is a baseball cap with a built-in radio, so you can listen to sport all day with your hands free. The Americans invented a kind of robot for sports fans. If you were watching your team on TV on your own, you could press a button (按钮) and the robot would do 'high-fives' with you! That's fantastic! I wonder if you have any wonderful ideas for inventions like these.

1.How many inventions are mentioned in the passage?

A.3 B.4 C.5 D.6

2.What should you do if you want to watch TV according to the scientist's invention in the passage?

A.You should press the button. B.You have to pedal the bike hard.

C.You have to inflate a plastic ball. D.You must turn on the power.

3.Which of the following is true according to the passage?

A.The writer doesn't like the invention of a bicycle that can cross the river.

B.you can watch matches by wearing a baseball cap with a built-in radio.

C.You can start the car after drinking if you have an emergency.

D.You needn't pedal the bicycle while you are inside the huge plastic ball.

4.What's the meaning of the underlined word "high-fives" in the last paragraph?

A.举手击掌 B.举高手掌 C.挥手欢呼 D.起立欢呼

5.What's the passage mainly talking about?

A.The reason why these inventions don't become popular.

B.These inventions should be more successful.

C.Everyone should have one wonderful idea like these inventions.

D.Some information about unusual inventions.

九年级英语阅读单选困难题查看答案及解析

You have lots of things you'd like to do. But sometimes it's hard to get to the finish line-just like your goal. How can you break your bad habits and develop good ones? 1. Here are a few opinions we often get from kids, followed by ideas that might help.

● I can' 't get away from screens.

2. If you usually spend time lying on the sofa and watching TV programs or a video when you're bored, go somewhere else instead. Take a book to your room or your violin to the backyard. Or ask if you can help cook in the kitchen.

● 3.

Start with "showing up. " Then take one small step or do one tiny task, followed by another and another. For example, how do I practice the piano? First sit at it. Then play one note at a time.

Starting with a super-simple step often helps. Why? It's easy, quick, and gets you in action. 4.

● I have no time.

Take a look at the choices you make about how you spend time. Do those choices show what's important to you? Can you spare 10 minutes a day to work on a goal? Let's suppose you want to be singer. 5. Talk with a parent about why your goal counts. Discuss whether you can let go of something less important to free up time to achieve it.

A.Then keep taking steps.

B.I can't start such a huge goal.

C.And how can you try to reach your goals?

D.To change a habit, try changing where you spend your time.

E.Is it more important to practice singing than play video games?

九年级英语补全短文5选5困难题查看答案及解析

The 23th Winter Olympics is commonly known as the 2018 Pyeongchang (平昌) Olympics. It is held from February 9th to February 25th in Pyeongchang County, South Korea. This marks the first time South Korea has hosted the Winter Olympics, and the second time the Olympic games have been held in this country, after the 1988 Summer Olympics in Seoul(首尔). It also marks the third time East Asia has hosted the Winter Games, after Sapporo, Japan (1972), and Nagano, Japan (1998). It is the first time that three consecutive(连续的) Olympic Games can be held in East Asia. Besides the 2018 Pyeongchang Olympics, the rest two are Tokyo 2020 (Summer) and Beijing 2022(Winter).

There are ninety-two teams with at least one athlete to compete in the Games. The top three are the Unites States, Canada and Switzerland in the number of athletes while the top three are Norway, Germany and Canada in the number of medal table.

In this Olympics, there is a great person that Chinese, even people around the world must have kept in mind. His name is Wu Dajing, a short track speed skater. He won a gold medal in the Men’s 500 meters, setting an Olympic record and two world records. He became only the second person in history to have skated in less than 40 seconds, after American J.R. Celski. It’s quite sure China will make the next Winter Olympics surprisingly great and many Chinese athletes like Wu will do their best in it. Look forward to Beijing 2022 and welcome to China!

1.How many days did the Pyeongchang Olympics last?

A.Fifteen days. B.Sixteen days. C.Seventeen days.

2.When is the first time Japan held the Winter Olympics?

A.In 1972. B.In 1988. C.In 1998.

3.Which countries got the most medals in the Pyeongchang Olympics?

A.The United States, Canada and Switzerland.

B.Norway, Germany and Canada.

C.China, Japan and South Korea.

4.Why is Wu Dajing so famous?

A.Because he is a Chinese.

B.Because he will compete in the 2022 Winter Olympics.

C.Because he set records in short track skating.

5.According to the passage, which of the following is TRUE?

A.From 1872 to 2022, there are three Olympics in Asia.

B.The number of events in the Pyeongchang Olympics is 92.

C.J.R. Celski is the first man who has skated in less than 40 seconds.

九年级英语阅读单选困难题查看答案及解析

A: Hey, Alex. The Winter Olympics will be held in Beijing in 2022.1..

B: Yes, I really like watching the Winter Olympics.

A: Me too. And I like the Olympics torch (火炬).

B:2..

A: I am looking forward to it.

B:3..

A: I love to watch team events.

B: I enjoy watching the men's and women's skating. The skaters are so amazing.

A:4..

B: I know. And they look so beautiful and cool on the ice.

A:5..

B: OK. See you in Beijing.

A.What are your favourite events?

B.Yes, I like it.

C.Are you going to watch some games?

D.I can't wait to see them.

E.They train hard for the Olympics.

F.You can see it at the opening ceremony.

G.I'd love to

九年级英语补全对话7选5简单题查看答案及解析

You've been learning words since you were a tiny baby. At first, you learned them only by hearing other people talk. Now that you're a reader, you have another way to learn words. What should you do when you come to a word and you think you don't know what it means? 1..

Say it

First sound it out. Then say it to yourself. 2.. Sometimes you know a word in your head but you don't know what it looks like in print. So if you match up what you know and what you read - you have the word!

Use context

If this doesn't work, take the next step: look at the context — the other words and sentences around it. Read this sentence: When it rained, the dog looked for shelter in the doorway. 3.. Rain and in the doorway might give you helpful information.

4.

If the context doesn't help, look at the parts of the word. Does it have any parts you know? These can help you understand what it means. If you don't know the meaning of miner, try looking at parts of the word. You might know that a mine is a place underground where people get coal and other valuable things. A lot of times, -er at the end of a word means "a person who does something". So a miner might be someone who works in a mine.

Look it up

If the three steps above don't work, you can look it up.5. — either a book or online.

Nobody knows the meaning of every word, but good readers know how to understand words they don't know.

A.Use word parts

B.Look at the words

C.It might sound like a word you know

D.You can find the word in a dictionary

E.Following some easy steps can help you

F.If the word shelter doesn't look familiar. look at the words around it

九年级英语补全短文6选5中等难度题查看答案及解析

2018年上海徐汇二模
The 2018 Winter Olympics took place ________February 9 to 25 in South Korea.

A. in　　 B. on　　 C. of　　 D. from

九年级英语单选题中等难度题查看答案及解析

Teens are not as healthy as they used to be. They are putting on weight. A recent research shows 97% of the teens need more exercise. 1. First, exercise can help your mind. People who get plenty of physical activity might worry less and sleep better at night. You may even learn better in school. 2. Physical activity can make your body strong. It can also keep you at a healthy weight. But how can teens be encouraged to do more exercise? Here are some good suggestions.

3. Doctors call watching TV or playing video games screen time. You should have no more than two hours of screen time a day. Then you will enjoy your life more.

4. Interest is the best teacher. You can choose the traditional sports, such as basketball, soccer, or baseball. Those are all great sports and if you like them, play them.

5. Find a friend or a family member to exercise with you. You will have more fun and it’s not easy for you to give up.

All in all, it’s necessary for teens to do more exercise.

根据短文内容，将下面方框内的句子还原到文中空白处，使短文内容完整、通顺（每个选项只能用一次）。

A.Second, exercise helps your body.

B.Step away from the screen.

C.Exercise with others together.

D.Exercise helps in two ways.

E.Find a sport you are interested in.

九年级英语补全短文5选5中等难度题查看答案及解析

Drawing might help you think

When you're sitting in class, have you ever drawn pictures in the margins of your notebooks? If so, your teacher might have told you1.(stop). Many people think of doodling（涂）as a distraction（精神涣散）from more important things. But it might be just the opposite.

One study shows that doodling may help you remember things you hear. In 2009, researchers asked two groups of people to listen to a phone message. One group2. (encourage) to doodle, but the other was not. Neither group knew that it would be asked to remember information from the message. But the group that doodled remembered 29 percent more.

Other people3.(suggest) other uses for drawing. Jesse Prinz, a professor who studies doodling, says it can help you think creatively. 4.(walk) away from a problem to draw might actually help you solve it. When you come back, you5.(have) a fresh perspective and figure out an answer more quickly.

Two years ago, an author named Sunni Brown6.(write) a book on doodling. She argues that doodling is a tool that can help people think. She admits that people see doodling as doing nothing, but she wants to change that. In fact, she runs a business that helps companies improve organization and planning doodling. Brown7.(believe) doodling is helpful because it incorporates（整合）many ways of learning. You learn in four ways: seeing, hearing, reading or writing, and through movement. The more ways you use, the8.(well) you learn. And when you doodle while you9.(listen) to a lecture, you use all four.

You might think that being good at10.(draw) is important for doodling. But if the point of doodling you think, then it doesn't matter what the picture looks like. Even if you're not an artist, doodling can help you. So next time you need help focusing, pick up a pen and doodle away!

九年级英语语法填空中等难度题查看答案及解析