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题型:阅读理解-单选 难度:0.65 引用次数:20 题号:15602714

If you look at the top of your phone, you’ll usually see a little symbol that says 3G or 4G. The “G” stands for the “generation” of your mobile network. But these symbols will become things of the past after 5G fully arrives.

On March 30th, 2019, Shanghai vice-mayor Wu Qing made the first 5G video call on a Huawei Mate X smart phone, CGTN reported. Shanghai has also become the first city in China to start testing 5G networks.

Now, 4 G takes about 100 to 200 milliseconds (毫秒) to send and receive data (数据). But 5G will get it down to 1 millisecond or less. This big change will not only make our mobile Internet faster, it can be used in many other ways as well

For example, 5G will help to make self-driving cars safer. Today’s self-driving test cars have one problem: lag. When the cat “sees” an obstacle (障碍物), it sends this information to a data center and receives instructions. However, it takes time to send and receive this information. With this kind of lag, the cars might crash (撞击) because they don’t receive instructions in time. With 5G, this lag will be greatly lowered, making the cars safer, according to CNN.

5G could also be used to make the Internet of Things (IOT) more powerful. This refers to a large online network that connects all things and people. Fast Internet speeds will be the key to developing this technology. For example, with IOT under 5G, your fridge could automatically (自动地) order eggs online when it finds that there are no eggs left inside.

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 Paragraph 2, we can know that ________.
A.5G is widely used in Shanghai
B.it cost lots of money to test 5G
C.China is working on its 5G networks
2. The underlined word “lag” probably means ________ in Chinese.
A.延迟B.迷路C.暂停
3. The fridge is mentioned in paragraph 5 to ________.
A.describe the importance of IOT
B.encourage people to try the new product
C.show 5G would make IOT more powerful
4. Which of the following would be the best title of the passage
A.Can 5G Go Far?
B.How is 5G Changing Our Life?
C.5G is on the Way
【知识点】 信息技术 说明文

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【推荐1】When you do your homework, you may often meet some problems. How do you solve them? Linda, a middle school student, would take out her smartphone, open a special app(应用)and search the problem. Answers soon appear on the screen.

Nowadays, many students do homework with the help of the special apps like Linda. “It’s convenient. You don’ t have to go out or wait for a tutor(家庭教师) at home.” Linda said. “You also learn by seeing how others work them out. It’s very helpful and improves students’ abilities” said John, another student. He said it was especially true for new types of homework.

John’s Chinese teacher often asks students to give speeches on great writers. When it comes to John’s turn, he usually searches online, picks out certain stories and makes PPTs. “I’ve become skilled at finding information online and using Microsoft Office,” John said.

However, many people think this trend (趋势)also brings up problems. Some students just copy the answers online without thinking. They become lazy.

Head teacher Mr. Wang in Linda and John’s school thinks that knowing how to use the Internet is important. The key is to have good self-control. “No matter how difficult the problem is, think about it by yourself first. Remember not to depend on the Internet too much.” the teacher said. “Be sure to understand the reasons behind the answers, or you won’t make progress. If you don’t have confidence in your self-control, ask your parents for help.”

1. If the students have problems in their homework, how do they solve them?
A.take out their computerB.wait for a tutor
C.search a special appD.ask for their teacher
2. What is not the advantage of the app?
A.convenientB.helpfulC.quickD.true
3. What progress does John make?
A.He can search online.B.He can pick out certain stories
C.He can make PPTs.D.He can become skilled at finding information online
4. Why is Mr. Wang against using the app?
A.The students have good self-control.B.The students understand the reasons behind the answers.
C.The students copy the answers online without thinking.D.The students think about the problem by themselves first.
5. What can we learn from the last sentence?
A.Mr. Wang advised students not to depend on the apps too much when doing homework.
B.Mr. Wang advised students to keep away from the app.
C.Mr. Wang advised parents to help students with their homework.
D.Mr. Wang advised parents to increase students’ confidence in self-control.
2021-11-05更新 | 248次组卷
阅读理解-单选(约370词) | 适中 (0.65)

【推荐2】Big data (大数据) is a lot of sets of information that are put together so they can be used by a computer program. The computer program looks for different kinds of answers or patterns in the data. Big data can have different kinds of information from many sources, such as information that comes from schools, social media sites, companies and governments. One set of data can have people’s names and addresses. Another set can have what they like, where they go to school, and how much time they spend on the computer.

Big data can be used in many ways. The government uses it to understand how many people travel on buses or trains. This information is then used to make bus or train systems better. Some schools use big data to understand which children may need extra help in class. The teacher can then give certain students more help or support so those students can succeed in school. Companies use big data, too. It helps them understand who buys their products. For example, one company uses weather data to see when people eat the most ice cream.

Big data can be used for good reasons. Some hospitals use big data to predict (预测) if a baby who is born too early will get sick. The hospital can then take extra steps to take care of that baby so he, she does not get sick. Big data can also be used for bad reasons. It can be used to predict which kinds of people are likely to break the law or hurt others, even if they have not done anything wrong.

How can big data be used for good and bad things? It is because the computer programs used to look at big data and understand it are written by people. People think a certain way. Because they think a certain way, they build a model of those ideas. These ideas are then used to look at the data. Sometimes, these ideas are helpful for people or businesses. Other times, bad ideas can cause problems for certain groups of people.

1. What is the first paragraph about?
A.What big data is and how it is used.
B.Why we can use big data in a number of ways.
C.Where important data is collected and stored.
D.What big data is and how it is collected.
2. How does the writer show that big data is useful from the reading?
A.Big data is widely used in every field.
B.Big data seldom brings any harm to people.
C.Everyone can get information from big data easily.
D.People can make certain right decisions according to big data.
3. What can we infer from the reading?
A.If there is plenty of information, it is called big data.
B.Big data provides any information for the government.
C.We should make full use of big data to serve the society.
D.Big data only collects the latest information from the world.
4. The overall tone (总基调) of this reading is ________.
A.sad and personalB.personal and scientific
C.informative but sillyD.scientific and informative
2020-05-27更新 | 66次组卷
阅读理解-单选(约280词) | 适中 (0.65)
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【推荐3】

Most of us spend all day at school or work. After a long and busy day, all we want to do is return to a comfortable home. Smart technology can turn any home into a nicer place to live in.

Smart homes have been around for some time. Scottish company Pico Electronics invented a type of technology called X10 in 1975. As the earliest smart home technology, it allows household devices (设备), such as lights and alarms, to communicate with each other by using radio waves.

Of course, 5G network connectivity has made smart homes much more sophisticated (复杂的) than X10. Perhaps the most widespread smart home technology is the voice-activated (声控的) assistant. Google Home and Amazon’s Alexa allow users to communicate with almost any device in their homes simply by speaking a few words. This is especially convenient for children and people with physical disabilities, as they can finish tasks that would normally be too difficult, according to How-To Geek.

Common household appliances (电器) can become “smart” as well. For example, smart fridges can create dinner recipes (食谱) based on the vegetables that are being kept inside, according to How Stuff Works.

But it’s not just about convenience. Smart homes are also good for the environment. By regularly checking your energy use and automatically turning off lights and other devices that you\re not using, smart homes can lower much electricity you use overall. Using less energy means that we use fewer natural resources, which is good for the environment.

1. The earliest smart home technology is ________.
A.X10B.Google HomeC.AlexaD.5G network
2. Which of the following is NOT true about the voice-activated assistant?
A.It can turn your home into a nicer place to live in.
B.It’s difficult for children and people with physical disabilities to use it.
C.It may be the most widely used smart home technology.
D.It allows users to communicate with almost any device in their homes.
3. What can a smart fridge do?
A.Tell you how to cook.B.Place an online order.C.Help you keep things fresh.D.Create a dinner with the vegetables.
4. The underlined word “automatically” means ________ in Chinese.
A.机械地B.定时地C.神奇地D.自动地
5. The best title for this passage is “________”.
A.5G network changes the worldB.Smart technology makes life convenient
C.Smart homes — a nicer way of livingD.Smart homes make people comfortable
2021-10-18更新 | 104次组卷
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