閱讀短文，選出合適的一項(xiàng)。
 Mobile phones are everywhere in our daily life.Most of them are 4 G mobile phones.But now the 5 G mobile phones are coming，do you know？
 What is5 G？5 G is the name for the next generation（下一代）of mobile data connectivity（移動(dòng)數(shù)據(jù)連接）.The5 G mobile phones are the phones that use this kind of mobile data connectivity you use this kind of phone to surf the Internet，you can feel it's really fast.You can also find you can surf the Internet easily，no matter how many people are surfing at the same time.5 G is only for mobile phones.People can use the5 G laptops（筆記本電腦）.Why do we need 5 G？It isn't because using it to surf the Internet is very fast，but there is no latency.If you are a game-lover，you may know it very well.For example，when you playing a game on the mobile phone，you hit a button，then it takes a little time to see the response（RA）.If you use a 5 G mobile phone，you can see the response right away.

（1）Most mobile phones that people are using now are

4 G

4 G

mobile phones
（2）Using 5 G to surf the Internet is

fast

fast

.
（3）5 G

is

is

only for mobile phones.
（4）The underlined word"" latency" means

D

D

" in Chinese.
A.錯(cuò)誤
B.方法
C.停止
D.延遲
（5）What subject does the passage belong to（屬于）？

B

B

A.Maths.
B.Science.
C.Art.
D.Chinese.