There is much heated discussion today about 5 G.Your Internet experience is not pleasant when the net speed is too slow—— it takes so long to open a web page and the talk show you're watching stops every few minutes.But soon it could be a thing of the past.On June 3、2020，the Chinese government told people that 5 G services would be offered around the country.
    5 G is the 5th generation network.It is a new network after 1 G、2 G、3 G and 4 G and it can connect everyone and everything together.5 G speed can be very fast 5 G has a very short delay between sending and receiving information.Now.4 G takes about 100 to 200 milliseconds（毫秒） to send and receive data（數據）.But 5 G will get it down to I millisecond or less — this ts almost real-time.In the near future，5 G network will cover many cities in China
    This big change will not only make our mobile Internet faster，but also deeply change our lives.For example，5 G will make self-driving cars possible.For safety，self-driving cars need super-fast data transmission （傳輸） to communicate with their nearby environment.5 G is just what makes self-driving cars achieve this.Even airplanes will become"smart"in the near future.Passengers will be able to use 5 G networks in the air to connect to the Internet or order food and drinks.
    5 G will be a big help for students who take online classes.In the world，many people live in poor areas where there are no schools.But with 5 G，this will change.Students all over the world will be able to see places like the Great Wall without leaving their rooms.
    In addition，5 G will be used in hospjye.aials.It will be easier for doctors to care for patients who live far away by 5 G.
    However.5 G has its own weaknesses.According to China National Radio，though 5 G will make our lives easier.jye.ai will not be perfect.For one thing.5 G will not "travel" far.On 4 G networks，you can be 10 kilometers away from the nearest transmission （傳輸） center and connect the Internet easily.But 5 G will only cover a distance（距離） of about 300 meters.And in order to use 5 G.jye.ai will have to buy new products specifically（專門地） made for 5 G that are expensive at present.

（1）The underlined word "delay" in Paragraph 2 most probably refers to "

A

A

".
A．the time to wait
B．the distance to cover
C．the data to receive
D．the speed to change
（2）What can we learn from the passage？

C

C

A．5 G will make self-driving less safe.
B．5 G travels faster and farther than 4 G.
C．5 G may cost more as a new technology.
D．5 G gives people uncomfortable experiences.
（3）What is the writer's main purpose in writing the passage？

B

B

A．To explain how 5 G is popular.
B．To give an introduction of 5 G.
C．To show why 5 G is important.
D．To encourage people to use 5 G.