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 nteworks fully arrive.
On March 30th, 2019, the first 5G video was made on a Huawei Mate X smart phone, CGTN reported. Shanghai has also become the first city in China to start testing 5G networks.
5G will be about 100 times faster than 4G networks. 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 object, it sends this information to a data （数据） center and receives instructions.
However, it takes time to send and receive this information. With this kind of lag, the cars might hit something 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 power the Internet of Things（IOT，物联网）. This refers to a large online network that connects all things and people. Fast Internet speed will be the most important to develop this technology.
【小题1】”G” stands for _________.| A．good | B．girl | C．generation | D．gate |
| A．Less than one month | B．About eight months | C．About four months | D．Less than three months |
| A．the car will be safer | B．the lag will disappear | C．the car will “see” an object | D．a data center can receive instruction |
| A．more information | B．a large online network | C．slow internet speed | D．4G networks |
| A．Faster fifth generation | B．A little symbol | C．The internet of things | D．Huawei Mate X |
