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   If you look at the top of your phone,you'll usually see a little symbol that says 3 G or 4 G.The "G" stands for the "generation" of your mobile network.But these symbols will become things of the past after 5 G networks fully arrive.
   On March 30th,2019,Shanghai vice-mayor(副市長)Wu Qing made the first 5 G video call on a Huawei Mate X smart phone,CGTN reported.Shanghai has also become the first city in China to start testing 5 G metworks.
   About 100 times faster than 4 G networks.5 G will let people download and upload data faster than ever before.But 5 G won't just bring faster mobile Internet.People can use it for many other things as well.
   For example,5 G will help to make self-driving cars safer.Today's self-driving test cars have one problem lag.When the car "sees" an obstacle(障礙物),it sends the information to a data center and receives instructions.However,it takes time to send and receive information.With this kind of lag,the cars might crash because they don't receive instructions in time.With 5 G,this lag will be great lowered ,making the cars safer,according to CNN.
   5 G could also be used to power the Internet of Things(IoT 物聯(lián)網(wǎng)).This refers to a large online network that connects all things and people.Fast Internet speeds will be the key to develop this technology.
The IoT could be used in a lot of ways.For example,with IoT,your refrigerator could automatically(自動(dòng)地)place an order online for eggs when it finds that there are no eggs left inside.
(1)We can know from the passage that 5 G
C
C
.
A.has been firstly tested in Beijing
B.stands for the generation of your smart phone
C.can make the networks 100 times faster than 4 G
D.will be fully used immediately
(2)The writer uses self-driving cars as an example to
A
A
.
A.explain how 5 G's fast speed can be helpful
B.explain how self-driving cars work
C.show us how advanced self-driving cars are
D.warn about the possible dangers of self-driving cars
(3)According to the passage,the IoT is
C
C
.
A.a(chǎn) robot that can do housework
B.a(chǎn)n online store where you can buy anything
C.a(chǎn) large online network that connects things and people
D.a(chǎn) type of high-tech refrigerator

【考點(diǎn)】人與自我
【答案】C;A;C
【解答】
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發(fā)布:2024/6/27 10:35:59組卷:0引用:1難度:0.9
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