You might have noticed that sometimes, when y...

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

You might have noticed that sometimes, when you are playing mobile games, the picture suddenly freezes(卡顿)because the network speed is o slow. However, these annoying things will soon become a thing of the past, as China just issued commercial licenses (发放商用牌照）for 5G networks on June 6, 2019. This means that China's telecommunications companies will be able to offer 5G network speeds to users.

The "G" in "5G"stands for generation. IG 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 SG bring?

It will allow us to download an entire HD movie in seconds. The delay(延时)between sending and receiving data will be shortened. Now, 4Gtakes about 100 to 200 milliseconds, while humans have a reaction time of about 200 to 300 milliseconds. But 5G will get the delay down to I millisecond or less, which is almost real—time.

With the development of 5G, new kinds of technology will be created and used.

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 each other, traffic lights and road sensors.

5G networks will be powerful, but not perfect. They do have some disadvantages.

On one hand, 5G signals don't go very far. On 4G networks, you can be 10 kilometers away from the nearest transmission base(传送基站）and don't lose signal. But 5G maxes out at about 300 meters. On the other hand, 5G signals have a hard time going through walls and rains. This means we will need to build many small transmitters to make sure 5G signals can be received everywhere. Soon you may see small boxes on every street lamp and building.

1.Why does the picture freeze when we are playing mobile games?

2.What does "G" in"5G"stand for?

3.How long will it take to download an entire HD movie with 5G?

4.What is the fourth paragraph mainly about?

5.What disadvantages do 5G networks have?

九年级英语回答问题中等难度题查看答案及解析

B. Choose the best words and complete the passage (选择最恰当的单词完成短文)

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

These annoying things will soon become a thing of the ________, as China just issued commercial licenses (发放商用牌照) for 5G networks on June 6, 2019. This means that China’s telecommunications (电信) companies will be able to offer 5G network speeds for mobile phone users.

The “G” in “5G” ________ generation (of mobile network technology). 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 you to download an entire HD movie in seconds. The delay 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 ________ 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 run more ________ because they can smoothly communicate with each other, traffic lights and road sensors (传感器).

5G also makes the internet of things (IoT, 物联网) possible. IoT is a large network that connects nearly everything. ________, your toaster might be able to automatically start making your breakfast after your alarm clock rings.

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.A.small B.low C.fast D.high

2.A.present B.future C.past D.old

3.A.goes to B.looks like C.relies on D.stands for

4.A.increase B.competition C.delay D.practice

5.A.widely B.slowly C.carefully D.safely

6.A.At last B.In addition C.For example D.In other words

九年级英语完型填空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 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 that ________.

A.people can't download a 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 6 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.The underlined word "them" refers to "___________".

A.operations B.robots C.5G phones D.speeds

4.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.

九年级英语阅读单选中等难度题查看答案及解析

阅读短文，根据短文内容回答问题．

When it comes to the letter grade on your test or homework, you might notice that there is no letter E. Have you ever thought about why that is so?

In the A, B, C, D and F grading system, the first four letters are typically considered passing grades. An F in this system simply stands for“fail”.The word“fail”happens to start with the letter F, which seems to leave out the letter E. The fact”．Some schools have U grade for“unsatisfactory”,or I grade for “incomplete”.

Even with all this said, we should also point out that E grade actually has been

used pretty commonly throughout the history of letter grades in the US.

The first college in the US to use a letter grading system like the ones we use today is Mount Holyoke College. In 1897,they began to use the following grading scale:

A: 95-100%(excellent)　　　　 B: 85-94%(good)　　　　 C: 76-84%(fair)

D: 75%(barely passed)　　　　 E: below 75%(failed)

We can see the inclusion of E instead of F.

Gradually,the letter grading system became more popular throughout the US. However, many schools decided to drop the E grade and go straight to F.There is no evidence(证据) to really support this,but one possible explanation is that teachers were worried that some students and parents might mistake E for “excellent”.

Why do we have letter grades? Well,part of the reason is that they made grading simpler during a time of great change for schools. As the 20th century began,growing cities and an increase in immigration led to larger school classrooms. Most teachers at that time thought this new letter grading system was an easy,fair and clear way to grade students.

Today,more and more people argue that letter grades don’t fully reflect(反映) student learning。However，as teachers try to improve grading methods,many parents continue to favor the letter grades they got as kids, they are familiar(熟悉) and easy for parents to understand. So while they might not be perfect, the letter grades probably aren’t going away any time soon.

1.what does an F stand for in the A、B、C、D and F grading system?

2.when was the letter grading system first used in the US college?

3.what is one possible explanation for dropping the E grade?

4.what did most teachers think of the letter grading system in the 20th century?

5.why do many parents still prefer the letter grades today?

九年级英语回答问题困难题查看答案及解析

阅读表达

When it comes to the letter grade on your test or homework, you might notice that there is no letter E. Have you ever thought about why that is so?

In the A, B, C, D and F grading system, the first four letters are typically considered passing grades. An F in this system simply stands for "fail". The word "fail" happens to start with the letter F, which seems to leave out the letter E.

The first college in the US to use a letter grading system like the ones we use today is Mount Holyoke College. In 1897, they began to use the following grading scale;

A: 95-100% (excellent)　　　　　　 B: 85-94% (good)　　　　 C: 76-84% (fair)

D: 75%( nearly passed)　　　　　　 E: below 75% (failed)

We can see the inclusion of E instead of F.

Gradually, the letter grading system became more popular all over the US. However, many schools decided to drop the E grade and go straight to F. There is no evidence(证据) to really support this, but one possible explanation is that teachers were worried that some students and parents might mistake E for "excellent".

Why do we have letter grades? Well, part of the reason is that they made grading simpler during a time of great change for schools. As the 20th century began, growing cities and an increase in immigration led to larger school classrooms. Most teachers at that time thought this new letter grading system was an easy, fair and clear way to grade students.

Today, more and more people think that letter grades don't fully show students' learning. However, as teachers try to improve grading methods, many parents continue to prefer the letter grades they got as kids,　 as they are familiar and easy for parents to understand. So while they might not be perfect, the letter grades probably aren't going away any time soon.

1.When was the letter grading system first used in the US college

______________________________________________________________________________

2.What is one possible reason for dropping the E grade

______________________________________________________________________________

3.If you're a teacher, do you prefer the letter grades? Why or why not?

______________________________________________________________________________

九年级英语回答问题困难题查看答案及解析

Have you ever noticed that you’re treated differently in stores based on your sex，age，race(种族)and even the way you dress? I certainly have，so 1 wanted to see exactly what happens inside these stores that are meant to be run with“customer(顾客)service”．

A young man in ripped jeans and a hoodie went into a car shop and asked for a price on the top of the line vehicle．The salesman looked him up and down and said．“I don’t think you can afford a　 car like this．Have a look at the　 inferior　 cars over here.”

As you can imagine，the young man was angry and left the showroom．Two days later, the

young man walked back in，and he walked up to the salesman who had served him two days before and asked，“Hi，do you remember me? You said l should look at the inferior cars the other day．”The salesman nodded and said yes．

The young man then asked him to just quickly come outside and have a look at something．

They walked out and the young man pointed to the brand—new top of the line Ford and said．“I paid with cash(现金)，do you like my new car?”And then the salesman quickly left．

Maybe many businesses don’t understand a fact—if they don’t treat their customers equally,they will lose business．Not every one of the above people will ever go back to those companies and they won’t recommend them to anyone．You will not only lose repeat business but also lose up to 10 customers，for every person you treat badly will not recommend your companies and will tell people not to go to these places．

1.What fact does the writer mainly tell us about treatment in the passage?

A．Everyone is treated equally in their life．

B．Many people are treated unequally in their life．

C．People don’t need to be treated equally in their life．

D．People need society to provide an equal environment．

2.What does the underlined word“inferior”mean in Chinese?

A．高级的　　 B．崭新的　　 C．下等的　　 D．二手的

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

A．The young man in brand．new jeans and a hoodie entered the showroom．

B．All the people treated badly will go back to complain about the service．

C．The salesman left quickly because he felt very embarrassed(尴尬的)．

D．If customers are treated equally, companies will lose repeat business．

4.Which of the English sayings can we get after reading the passage?

A．Love me love my dog．

B．A miss is as good as a mile．

C．A clean hand wants no washing．

D．Never judge from appearance．

九年级英语阅读理解中等难度题查看答案及解析

1.It's a friendly way people in the United States greet each other. But "How are you?" is also a very unusual question. It's a question that often doesn't have an answer.

When a person meets a friend on the street and asks "How are you?", the person doesn't really expect to hear an answer such as "I really don't know what's wrong with me.I thought I had a cold.I look some medicine, but that didn't help much, so I'll go to the doctor." The person who asks"How are you'" expects to hear the answer "Fine." even if the other person isn't! The reason is that "How are you?" isn't really a question and "Fine" isn't really an answer. 2.

Sometimes, people also don't say exactly what they mean. For example, when someone asks "Do you agree?", the other person might be thinking "No, I disagree. I think you're wrong." But it isn't very polite to disagree so strongly, so the other person might say, "I'm not so sure." 3.

People also don't say exactly what they are thinking when they finish conversations with other people. For example, many conversations over the phone end when one person says, "I've got to go now." Often, the person who wants to hang up gives an excuse： "Someone's at the door." I've got to put the vegetables away." "Something is burning on the stove!" 4.Perhaps the person who wants to hang up simply doesn't want to talk any more, but it isn't very polite to say that. The excuse is more polite, and it doesn't hurt the other person's feelings.

Whether they are greeting each other, talking about an opinion, or ending a conversation, people often don't say exactly what they are thinking. It's an important way that people try to be nice to each other.5.

A.We must learn when to keep silent.

B."How are you?" is a nice question.

C.And it's all part of the game of language!

D.The excuse might be real, or it might not be.

E.It's a nicer way to say that you don't agree with someone.

F.People sometimes shake hands when they meet each other.

G.They are simply ways of greeting people and saying "Hello."

九年级英语补全短文7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

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