Your parents might have told you that you'd g...

Your parents might have told you that you'd go blind from reading in the dark, but you could make up for it by eating a lot of carrots.This is just one of the wrong ideas you may have heard of.Here are scientific explanations for three mistakes people often make about our eyes

Can eating carrots improve your eyesight(视力)?

Carrots are rich in Vitamin A, which is essential for our eyes.Vitamin A helps people to see in low light conditions.However, eating more carrots doesn’t help you see better.A certain number of carrots will help, but a large number of carrots will not make you get rid of(摆脱) your glasses.

If your parents have bad eyesight, will you have bad eyesight, too?

Myopia(近视) can be inherited(经遗传得到) from parents.A study found that if both parents have myopia, there is a 33 to 60 percent chance that the child has.For children who have one parent with myopia, the chance is 23 to 40 percent, and it is down to 6 to 15 percent for kids with non-myopia parents.So no matter how bad your parents’ eyesight is, you will have a chance of having good eyesight.

Is it true that people who are color-blind can't see colors?

Color blindness doesn’t mean that someone can’t see colors at all.It means that some has difficulty seeing differences in certain colors, usually green and red or blue and yellow.Color blindness is usually a condition caused by not having cone cells(视锥细胞) or having the cells that don't work.There are different levels of color blindness. Some people cannot tell the differences between colors when light isn’t bright, while others have difficulty in any light.

1.Which of the following is the right idea about eating carrots?

A.Eating carrots doesn't help people see better.

B.People need to eat as many carrots as possible.

C.A certain number of carrots are enough for eyes.

D.Only people who have bad eyesight need to eat carrots.

2.The underlined word “essential” in the passage means “__________”in Chinese.

A.难以获取的 B.稍有影响的 C.极其罕见的 D.必不可少的

3.What can we learn according to the passage?

A.Children may inherit myopia from their parents.

B.Kids with non-myopia parents won't have myopia.

C.A kid has a 50% chance of having myopia if his or her father has myopia.

D.Kids with short-sighted parents won't have good eyesight.

4.What can we know about color blindness from the passage?

A.Having no cone well may cause color blindness.

B.People who are color-blind cannot see colors at all.

C.Those who can't tell green from red are not really color-blind.

D.Most people who are color-blind can only see black and white.

5.What's the best title for the passage?

A.Advice on staying away form myopia.

B.Reasons for bad eyesight and color blindness.

C.Explanations for some wrong ideas about eyes.

D.Medical information about improving your eyesight.

九年级英语阅读单选中等难度题查看答案及解析

在你离开之前，父母告诉你应该按时吃药。

Before you left, your parents told that you'd better _______________on time.

九年级英语完成句子简单题查看答案及解析

— Have you told Tom that we’re going to have a birthday party for him?

—No, I want to give him a 　　　　　 .

A. dream　　　　　　　 B. lesson　　　　　　　　　　 C. smile　　　　　　　　 D. Surprise

九年级英语单项填空中等难度题查看答案及解析

Why do people play sports? You might say “ to get exercise” and you’d be right. To have fun?　 That’s true , too. According to report, people who play sports get a lot more than just fit.

1.You may think sports will take up all your study time. But research shows that students who play sports do better than those who don’t. Exercise improves learning, and memory, which can help students become more active in the classroom.

It’s clear that people who play sports learn teamwork and goal setting skills.2.While working with teammates to win games and achieve goals, you’re learning how to be successful. Those skills make you good at work and in family life.

3. In addition to being fit and keeping a healthy weight, people who play sports are also less likely to smoke. And later in life, people who exercise are less likely to have cancer or some other illness.

Playing sports improves self- confidence. 4.Why? It builds confidence when you can practice, improve, and achieve your goal. Sports are also a feel-good activity because they help people stay and make new friends.

5.Playing sports can make you have less stress and help you feel a little happier. A person’s mood improves during exercise. Friends help improve your mood. And being on a team creates close relations between friends. It’s good to know your teammates will be on your side ---- both on and off the field!

A. Exercise cuts the pressure.

B. Sports are good for people’s health.

C. Sports teach people useful life skills.

D. People who play sports do better in school.

E. People who play sports feel better about themselves.

九年级英语补全短文5选5中等难度题查看答案及解析

Have you ever felt angry with your parents? Do you sometimes quarrel with your parents? If you're upset or angry, try to keep yourself cool. Sometimes, the more you show your anger, the unhappier your parents will be. Try to come up with an idea that can solve your problem so that it won't happen again.

It might seem that your parents don't understand you—but don't give up. Remember that they don't really want to make things difficult for you. Your parents care about you, but sometimes it's just hard for them to know what you are thinking.

One of parents' jobs is to take care of you and keep you safe—until you're old enough to take care of yourself (but some parents have trouble giving up looking after their children even then)!

Usually, kids who quarrel with their parents learn to get along with them sooner or later. This is especially true if kids are able to make their parents know how they feel and what's important to them.

And remember that this may take time. It's not always easy. Talking with your parents about your opinions patiently—instead of shouting at them—will also make them listen to you more carefully. And you'll get respect(尊敬) and learn how to get along with them.

1.If kids want to get along with their parents, they should try to make their parents know ______ their thoughts are.(填单词)

2.Translate the underlined sentence into Chinese.

_______________________________________

3.What does “this” in the last paragraph refer to?

_______________________________________

4.How can you make your parents listen to you more carefully?

_______________________________________

5.Give a proper title to the passage.

_______________________________________

九年级英语任务型阅读困难题查看答案及解析

You’d better _______ more time talking with your parents so that they can understand you _______.

A. spend, better　　 B. take, well　　 C. cost, well　　 D. pay, better

九年级英语单选题困难题查看答案及解析

You might have noticed that sometimes, when you’re playing mobile games or making a video call, the picture suddenly freezes(卡顿)because the network speed is too slow. When you try to download a movie on your phone, it seems to take forever.

These annoying things will soon become things of the past, as China just issued commercial licenses(发放商业牌照)for 5G networks on June 6. This means that China’s telecommunications(电信) companies will be able to offer 5G network speeds for mobile phone users.

The “G” stands for generation (代) . 1G let us talk to each other, 2G let us send messages, 3G gave us mobile data and Internet, and 4G made all of these things faster. So what will 5G bring？

First of all, 5G is so fast that it will allow us to download an entire HD movie in a second. The delay(延时) between sending and receiving data will be shortened. Now, 4G takes about 100 to 200 milliseconds(毫秒)，while humans have a reaction time of about 200 to 300 milliseconds. But 5G will get the delay down to 1 millisecond or less, which is almost real-time.

Because of this increase in speed, it will be possible to create and use new kinds of technology. Robots will be used to do operations because doctors will be able to control them from somewhere else without any delay. Self-driving cars will be able to drive more safely because they can smoothly communicate with other cars, traffic lights and road Sensors (传感器). 5G also makes the Internet of Things(IOT物联网)possible.

All in all, 5G will shape every type of technology that it touches. And you won’t have to wait too long for that to happen.

1.From the first paragraph we can know that________.

A.people can’t download movie at all on the phone

B.making a video call is impossible for phone users

C.sometimes the network speed is too slow to use

D.mobile games can’t be downloaded on the phone

2.What happened on June according to the passage？

A.China just gave commercial licenses officially for 5G networks.

B.Every mobile phone user could improve the network speed

C.Most mobile phone users didn’t use 4G anymore.

D.All the mobile phones are much cheaper than before.

3.Which of the following is NOT true according to the passage?

A.5G will make people’s life much easier and more convenient.

B.Self-driving cars will become safer because of the use of 5G.

C.Using 5G to download something doesn’t take any time at all.

D.5G can make people download an entire HD movie in a second.

4.We can find the passage________.

A.from an ad B.in a newspaper C.in a storybook D.in science fiction

九年级英语阅读单选困难题查看答案及解析

Are you short-sighted? If you are, your parents might have tried to do something to fix it, such as having you get an eye massage(按摩), take medicine or even get surgery(手术). People who offer these services or products often say that they can reduce or even cure short sight.

However, you will no longer see advertisements like this before long. The government has issued a notice to ban(禁止) businesses from using words like “recovery" or "short sight cure" in their advertisements.

The notice says that short sight cannot be completely cured with current medical technology. Therefore, these advertisements could mislead children and their parents.

Young people can prevent and control short sight by spending more time outside and less time in front of books or computers. People who have sight problems should first go to a hospital and let a doctor decide what to do.

More than 450 million Chinese have suffered from short sight since June 2018. Short sight rates are around 30 percent for primary school students, 60 percent for junior high school students and 80 percent for senior high school students. This is likely because students spend a lot of time reading books and using electronic devices.

To reduce short sight among young people, the government made a new plan last August. The plan is designed to limit the amount of time children spend playing video games, as well as limit the production of new video games.

1.Some people say that they can cure short sight to _________.

A. show off their high-leveled skills B. sell more products and services

C. share their medical technology D. prove that eye massages are useful

2.Advertisements with the word "__________“ will be banned by the government.

A. recovery B. eyesight C. short sight D. surgery

3.If you have a sight problem, you should ___________ first.

A. get surgery B. get an eye massage

C. take some medicine D. ask a doctor for advice

4.According to this passage, which group has the highest short sight rate?

A. Primary school students. B. Junior high school students,

C. Senior high school students. D. College students.

5.From the last two paragraphs, we can know that _________.

A. students should be stopped from using mobile phones

B. students in lower grades are more likely to get short sight

C. production of new video games will be limited

D. a law was made to protect the eyesight of people

九年级英语阅读单选困难题查看答案及解析

Don’t  you  want to go to school? You could tell your parents you’re ill. But last Monday, students from Shanghai and Zhejiang had an even better excuse: a typhoon(台风)!

Typhoon Khanun hit East China on September 11. In Shanghai, all the school were closed the next day, Monday.

It was the first time that Shanghai had to close schools because of  bad weather.

But some students still came to school that day. “ I didn’t get the notice that the school was closing,” said Shen Sheng, a Junior 2 student from Shanghai Aiguo School. “ But it was nice that we could play in school rather than study.”

The school kept Shen and other 20 students safe inside and let them play sports like table tennis.

But the storm wasn’t all fun games. Typhoon Khanun killed 14 people. In Zhejiang, it damaged about 8,000 houses. More than one million people had to be taken to safer places.

Every year, typhoons hit different places around the world. Most happen in July, August and September. This year 15 typhoons hit China. Khanun was the strongest. Typhoons bring strong winds and rains. The winds can blow away houses and cars. The rains are bad for farmers’ fields.

Typhoon also kills people. Earlier this month, Typhoon Talim hit East and Central China. It killed at least 124 people.

1.When was the first time that Shanghai had to close all the schools?

A. In August    B. In July   C. On Sep.11.    D. On Sep.12.

2.Shanghai had to close all the schools that day because of _____.

A. bad traffic   B. heavy rain   C. Typhoon Khanun   D. Typhoon Talim

3.What did Shanghai Aiguo School do with Shen Sheng and some other students when they still came to school that day?

A.  They were kept safe inside and played sports like table tennis.

B.  They were asked to go back home as quickly as possible.

C.  They were sent back home by their teachers at once.

D.  They still had classed in the classroom as usual.

4.What does the word “damage” in Paragraph 6 mean?

A.建造   　　 B.损毁　　    C.伤害　　    D.装饰

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

A.  If a typhoon hits, many students shouldn’t go to school or go out.

B.  More than one million people were killed in Zhejiang that day.

C.  Every year, 15 typhoons hit different places around the world.

D.  Typhoons do a lot of harm to farmers’ fields and human beings.

九年级英语阅读理解困难题查看答案及解析

You shouldn't go out at night without ________your parents.

A. to tell　　 B. told　　 C. tell　　 D. telling

九年级英语单选题中等难度题查看答案及解析