It might be fun to use your smartphone, but b...

It might be fun to use your smartphone, but be careful. Too much screen time may be harmful to your health.

First, it is bad for your eyes. A researcher called Sarah Hinkley says the problem comes from the blue light that the screen gives out. Looking at a smartphone for a long time can cause eye strain（劳损）, headaches and dry eyes. So it is a good idea to take a break every 15 minutes when you are working at a computer or using a smartphone.

Second, screen use can do harm to children’s brains. A new study shows that using screens too much can affect（影响） how children’s brains grow. If children use screens for more than one hour a day, they might have lower levels of white matter in their brains. White matter is a key to the development of language and reading skills. So it is wise to cut down the time of children using all kinds of screens.

Third, using screens too much will affect your sleep. According to a study, about 95% of the people between the ages of 13 and 64 use electronics before bed, especially the young people under 20. Doctors say that the light from those electronics at night may make you excited before you go to bed. Then it’s hard for you to get enough sleep. So you’d better turn off smartphones, TVs, and all other screens an hour before your bedtime.

To keep healthy, doctors and researchers strongly advise that you shouldn’t use screens for long hours.

1.The blue light from your screens can cause ________.

A.eyestrain B.headaches C.dry eyes D.all of the above

2.According to the passage, you can’t sleep well because you ________.

A.take a break every 15 minutes B.have lower levels of white matter

C.use screens too much before bed D.are the people from 13 to 64

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

A.Using smartphones for long hours does harm to your eyes.

B.A lot of screen time affects children’s brain growth.

C.The light from electronics at night may make you excited.

D.People of all ages mustn’t use electronics.

4.You may read the passage in ________.

A.a science magazine B.a travel diary C.a guide book D.a novel

5.What is the main idea of the passage?

A.The ways to keep healthy. B.The harm of using screens too much.

C.The ways to use screens. D.The advantages of using screens.

九年级英语阅读单选中等难度题查看答案及解析

Laboratory　work　is　your　chance　to　learn　science　firsthand.　It　can　be　fun　but　you　must　be　careful　to　prevent　injury.　Listen　closely　when　your　teacher　reads　and　explains　the　rules　before　your　first　lab　lesson.

LABORATORYRULES

Throughout　the　lesson

·Do　not　enter　the　science　lab　without　the　teacher’s　permission.·No　food　or　drinks　are　to　be　alowed　in　the　science　lab.

Before　the　Experiment

·Read　al　instructions　carefuly　before　every　experiment.

·Prepare　al　apparatus（仪器）and　arrange　them　so　that　you　wil　not　knock　them　over　while　doing　the　experiment.

During　the　Experiment

·If　you　are　unsure　of　how　to　use　any　apparatus　or　how　to　operate,　ask　your　teacher　for　help.·Never　smel　or　taste　chemicals　unless　your　teacher　gives　permission.

After　the　Experiment

·Wash　al　apparatus　after　use　and　return　them　to　the　places　where　they　were.

·Throw　waste　materials　in　proper　waste　baskets.　　　First　Aid　　　

·Report　al　accidents　to　your　teacher　immediately.

·If　you　spil（ 溅 出 ）any　chemicals　onto　your　body　or　clothing,　wash　with　plenty　of　water　and　report　to　your　teacher.

1.　Your　teacher　wil　probably　tel　you　the　rules　above　_____　the　first　lab　lesson.

A.　before　　　　B.　since　　　C.　during　　　D.　after

2.　Before　every　experiment,　you　should　_____.

A.　taste　the　chemicals　first

B.　clean　al　the　apparatus

C.　read　al　instructions　carefuly

D.　report　al　the　accidents　to　the　teacher

3.　When　you　are　not　sure　how　to　use　al　apparatus,　_____.

A.　try　them　on　your　own

B.　read　the　rules　carefuly

C.　ask　your　teacher　for　help

d.　put　them　back

4.　It　is　clear　that　you　can　_____.

A.　 bring　food　into　the　lab

B.　enter　the　lab　anytime

C.　smel　chemicals　as　you　like

D.　learn　science　directly　in　the　lab

5.　If　you　get　chemicals　on　the　clothing,　you　can　find　ways　to　solve　it　in　the　part　_____.

A.　Before　the　Experiment

B.　First　Aid

C.　During　the　Experiment

D.　After　the　Experiment

九年级英语阅读理解中等难度题查看答案及解析

Laboratory work is your chance to learn science firstly. It can be fun, but you must be careful to avoid hurting.Listen closely when your teacher reads and explains the rules before your first lab lesson.

1.Your teacher will probably tell you the rules above __________ the first lab lesson.

A. before　　　　　　　　 B. since　　　　　　　　 C. during　　　　　　　 D. after

2.It’s clear that you can _______________

A. bring food into the lab

B. enter the lab anytime

C. smell chemicals as you like

D. learn science directly in the lab

3. If you get chemicals on your clothes, which of the following ways can you find to solve it?

A. Before the experiment　　　　　　　　　　　　 B. First aid

C. During the experiment　　　　　　　　　　　　 D. After the experiment

九年级英语阅读理解中等难度题查看答案及解析

Laboratory work is your chance to learn science first-hand. It can be fun but you must be careful to prevent injury. Listen closely when your teacher reads and explains the rules before your first lab lesson.

1.Your teacher will probably tell you the rules above ________ the first lab lesson.

A. before            B. since            C. during           D. after

2.Before every experiment, you should ________.

A. taste the chemicals first

B. clean all the apparatus

C. read all instructions carefully

D. report all the accidents to the teacher

3.When you are not sure how to use all apparatus, ________.

A. try them on your own                  B. put them back

C. ask your teacher for help                 D. read the rules carefully

4.It is clear that you can ________.

A. bring food into the lab

B. enter the lab anytime

C. smell chemicals as you like

D. learn science directly in the lab

5.If you get chemicals on the clothing, you can find ways to solve it in the part ________.

A. Before the Experiment                 B. First Aid

C. During the Experiment                 D. After the Experiment

九年级英语阅读理解困难题查看答案及解析

Laboratory work is your chance to learn science first—hand. It can be fun but you must be careful to prevent injury.

Listen closely when your teacher reads and explains the rules before your first lab lesson.

根据材料内容选择最佳答案，并将其标号填人题前括号内。

1. Your teacher will probably tell you the rules above ______ the first lab lesson.

A. before B. since C. during D. after

2. Before every experiment, you should ______ .

A. taste the chemicals first

B. clean all the apparatus

C. read all instructions carefully

D. report all the accidents to the teacher

3.When you are not sure how to use the apparatus, you should ______ .

A. try them on your own

B. read the rules carefully

C. ask your teacher for help

D. put them back

4.It is clear that you can ______ .

A. bring food into the lab

B. enter the lab any time

C. smell chemicals as you like

D. learn science directly in the lab

5. If you get chemicals on the clothing, which part can you find ways to solve it?

A. Before the experiment B. First aid

C. During the experiment D. After the experiment

九年级英语阅读理解中等难度题查看答案及解析

Smartphone apps certainly make our lives easier. However, sometimes they can also cause problems。

Recently, the Ministry of Education（教育部） announced that teachers should not use WeChat or QQ to give homework or ask parents to grade kids’ homework.

Many teachers in China depend heavily on apps to give homework, The kids have to do their homework, staring at a phone screen. For example, Liu Yanming, a sixth-grade student in Shanghai, usually has to use his mother’s mobile phone to do his homework, Liu Yong. his father, is afraid that the apps could distract kids by encouraging them to watch something unrelated （无关的） to homework. “He is just 12 years old, and I do not want to buy him a cellphone,” Liu told China Daily. “I also worry that my son’s eyesight will be hurt because of staring at the phone for too long.

However, Bai Yueping, president of Shanghai Tangzhen Middle School, defended （辩护） using apps for homework. Parents can understand their kid’s learning situation and supervise （监督） them to finish the homework, Bai told China Daily.

Zhang Siqi is a student from Renmin University of China. ________ “The use of WeChat or QQ to give homework is convenient,” Zhang told China Daily. “We're living in an Internet era（时代）. It’s unwise to refuse to take advantage of technology. ”

Chu Zhaohui, a researcher at the National Institute of Education Sciences, believed that it is impossible to stop the use of electronic devices（设备） in the Internet era. However, students should use them when it’s necessary, such as when they do listening exercises. “ We don’t want to stop online education models, but they must be used carefully. Modern technologies are good. but they should not steal the show（喧宾夺主）,” he told China Daily.

1.What did the Ministry of Education announce recently?

A.Students shouldn’t use smartphones at school

B.Teachers shouldn’t give children too much homework

C.Students shouldn’t use smartphones to do their homework

D.Teachers shouldn’t use smartphone apps to give homework

2.What do the underlined words “distract kids” in Paragraph 3 probably mean?

A.make kids feel bored B.improve kids’ interest

C.get kids more excited D.take kids' attention away

3.Which of the following is the best for “________” in Paragraph 5？

A.He agrees with Liu Yong B.He agrees with Bai Yueping

C.He thinks it’s unwise to use the apps. D.He thinks it’s useless to use the apps

4.Which of the following would Chu Zhaohui probably agree with?

A.We should use electronic devices as much as possible

B.We should use electronic devices only for listening exercises

C.It’s better to use electronic devices more carefully

D.It’s better to stop using electronic devices in teaching

九年级英语阅读单选简单题查看答案及解析

All children 1.(grow) up one day. That is the way it has always 2.(be). You, too, are growing up. Even as you attend your daily classes, you are growing up. You should have fun as you are gowing up. But you must not forget that you have 3.(responsibility).

You might not know exactly 4. you want to be when you grow up. And that’s OK. You should try to find out 5. much as you can about future job opportunities. Discover what you’d like to do when you grow up.

Do you know anyone who could give you some good 6.(advise). What about your teachers? How about your parents, your uncles 7. your aunts? If you’d like to become a doctor, why 8. you meet with a doctor and discuss what it takes to become one? You’re only in junior high school, but years go by 9.(quick). It’s good to be 10. for the future.

九年级英语语法填空中等难度题查看答案及解析

Is modern life moving too fast? Do you feel as if you are running hard, but staying in the same place? Well, you are not alone. According to a recent study, 78% of the young people say the “sped-up” pace（节奏）of modern life is making them feel really tired.

Rapid changes in technology and society are the main causes of the problem.1.With everyone connected by smartphones, young people can easily learn about the newest, the latest and the coolest things happening around them. No one wants to miss a hot topic. And with all the videos, games and the messages they get from smartphones, they feel uncomfortable when it’s quiet— so boring!

Is there a way to help stop the “sped-up” life? Yes, there is.2.Staying away from your phone for a few hours each day, we will put you back in control of your life. Even Bill Gates and Steve Jobs were worried about the influences of the technologies they had created.3.

As human beings, we are not supposed to be stimulated（刺激）all the time. It can even be harmful to both our physical and mental health.4. These things can help you lead a peaceful life. It’s a little bit hard at first, and you have to make a great effort, but it’s you who can take control of your time and life, isn’t it?

根据短文内容，从下列选项中选出能填入空白处的最佳选项，选项中有一项为多余选项。

A.Turn off your smart phone.

B.However, the smart phone plays an important role in your life.

C.So, slow down to visit a park, read a book and take up a hobby.

D.And the continuous bombardment（轰炸）of information can be another cause.

E.They didn't allow their own kids to use the smart phone and the Internet for too long.

九年级英语补全短文5选4中等难度题查看答案及解析

Someone's always watching you online...

How do they get my information? Did you know that when you surf the Web, many websites put secret software on your computer? The software collects a large amount of information about you and sends it to Internet companies. The Internet companies sell it to other businesses. Your personal information can also be collected from social media（媒体）sites. There are many ways your information can be used.

What information do they collect and why? First, companies collect your information. The companies find out where you live, what websites you visit, and what you do online. With this information, they can guess other things about you. For example, they can guess if you are male or female, how old you are, and your interests. The companies use this information to decide which advertisements（广告）are best for you. Two people can go to the same website, but they will see different advertisements. For example, someone who likes sports could see an advertisement for sneakers, and someone who like films might see an advertisement for movie.

What do they do with my information? Your personal information could also be sold. Some companies collect information just so they can sell it to other businesses. A business that collects and sells personal information is called a data broker. When data brokers sell your information, a lot of different companies will know your online habits. Then these companies will advertise products or other websites to you.

What online habits are tracked（追踪）? Another way your personal information can be collected is through social media. When your information is on social media, a lot of people can see it. Even if you don't use social media, a friend might post a picture or video of you with your name on it. Pictures and videos can be shared for free on social media, which is one of the great benefits（福利）. However, that same act of sharing could be problem for your own security（安全）. If someone knows too much about you, they can steal your identity（身份）. Then they can buy things online and post messages while pretending（假装）to be you.

Conclusion. All of your online habits can be recorded. Studying people's online habits is big business. Your personal information is very valuable to companies. That is how they know who to send their advertisements to. The Internet reaches almost every corner of the world, but the danger is that your personal information might travel that far, too.

正确的，涂A：错误的，涂B。

1.All businesses collect a large amount of information about you online.

2.People who go to the same website may see different advertisements.

3.Data brokers collect your personal information for money.

4.If you don’t get online, your information will be safe.

5.Your personal information can go anywhere with the Internet.

九年级英语阅读判断中等难度题查看答案及解析

Students in France have one less thing to put in their backpacks these days. The country recently banned（禁止）smart phones in public schools for all students through ninth grade. Many schools around the United States have similar bans.

Some educators say kids pay better attention in class when they aren't constantly（始终）looking at their phones. They say banning phones encourages students to talk to cach other more.

Most teachers would agree that they don't want a classroom full of kids texting. But many say a total ban on phones isn't necessary. Some people argue that it is better to teach kids to use technology responsibly（负责任地）than take it away. Plus, many parents point out that they need to be able to reach their kids during the day.

1.Students are not allowed to bring smartphones to public schools in_____

A.China B.France C.Japan D.Australia

2.What can be learned from the third paragraph?

A.Most cducators encouragc students to use phones at school.

B.Many parents say yes to have a total ban on phones.

C.Some people think students should use phones properly.

D.Some teachers like a classroom full of kids texting.

3.After banning phones in schools, students may______.

A.get help from others more easily

B.check out apps more quickly

C.listen to their teachers more carefully

D.text their friends more often

4.Parents may agree with"Group No"because______.

A.they want to keep in touch with their kids

B.they like to look up answers to a text

C.they need to teach their kids more

D.they are willing to do research online

5.What would be the best title for the text?

A.Are smartphones useful for learning?

B.Should schools ban smartphones?

C.How can students use smartphones?

D.Why do schools ban smartphones?

九年级英语阅读单选中等难度题查看答案及解析