专题05 阅读理解之说明文10篇-2023年中考英语逆袭冲刺名校模拟真题特快专递（广东专用）

学科网 学科网原创，让学司更名品！ JP.ZXXK.COM 学科网精品频道全力推荐 2023中考英语逆袭冲刺名校模拟真题速递（广东专用) 第二期 专题05阅读理解之说明文10篇 (2022-广东东莞东莞市横沥中学校考一模)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 smartphone,CGTN reported.Shanghai has also become the first city in China to start testing 5G networks. Now.4G takes about 100 to 200 milliseconds()to send and receive data().But 5G will get it down to I 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 car“sees”an obstacle(㎡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()because they don't receive instructions in time.With 5G,this lag will be greatly lowered,according to CNN 5G could also be used to power the Internet of Things(IoT),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 refrigerator could automatically()place an order online for eggs 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 took lots of efforts to test 5G C.China is working on its 5G networks D.5G would make it possible to take videos 2.Compared with 4G,5G could be A.cheaper B.faster C.safer D.busier 3.The underlined word"lag"probably means A.being lost B.being slow C.being dangerous D.being broken 4.The refrig