题型:阅读选择 题类:真题 难易度:普通
四川省自贡市2019年中考英语试卷(含听力音频)
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" (代) of your mobile network. But the symbols will become things of the past after 5G networks fully arrive.
On March 30, Shanghai vice-mayor Wu Qing made the first 5G video call on a Huawei Mate X Smartphone. Shanghai has also become the first city in China to start testing 5G networks.
About 100 times faster than 4G networks, 5G will let people download and upload data(数据) faster than ever before. But 5G won't just bring faster mobile internet. People can use it for many other things as well.
For example, 5G will help to make self-driving cars safer. Today's self-driving test cars have one problem-lag(延迟). When the car "sees" an obstacle(障碍物), it sends this information to a data center and receives instructions, However, it will be some time before it sends and receives this information. With this kind of lag, the cars might crash because they don't receive instructions in time. With 5G, this lag will be greatly lowered, making the cars safer.
5G could also be used to power the internet of things (IoT), that is, a large online network that connects all things and people. Fast internet speeds will be the key to developing this technology.
The IoT could be used in a lot of ways. For example, with IoT, your refrigerator could automatically (自动地) place an order online for eggs when it finds that there are no eggs left inside.
At the Tokyo Olympic Games, "post-2000s"(00后)players got 12 of China's 38 gold medals(金牌). Here are three of these young players.
Zhang Changhong,22 Zhang is from Shandong. He is cool and quiet. However, this makes him a good shooter(射手). And every time he shot, he did it best. In 2021, he went back to hometown, he visited Nanshan with his family. | |
Li Wenwen,22 Li did best in the women's weightlifting +87 kg division(87公斤级举重). In fact, Li had leg problems, but she didn't let these things get her down. Every time she went to lift, she shouted to make herself excited. | |
Quan Hongchan,15 Quan was the youngest player of the Chinese team, but won the women's 10-meter platform dive(跳台跳水)three times. The talented girl said she just "did her common thing". During practicing, she usually dived more than 300 times every day. In her free time, she is just like any other girl. She likes to play games and eats delicious food. |
试题篮