【題目】 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"（代） of your mobile network． But the symbols will become things of the past after 5G networks fully arrive．

On March 30， Shanghai vice﹣mayor Wu Qing made the first 5G video call on a Huawei Mate X Smartphone．Shanghai has also become the first city in China to start testing 5G networks．

About 100 times faster than 4G networks， 5G will let people download and upload data（數(shù)據(jù)） faster than over before． But 5G won't just bring faster mobile internet． People can use it for many other things well．

For example， 5G will help to make self﹣driving cars safer． Today's self﹣driving test cars have one problem﹣﹣lag（延遲）． When the car " sees " an obstacle（障礙物）， it sends this information to a data center and receives instructions． However， it will be some time before it sends and receives this infomation． 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， making the cars safer．

5G could also be used to power the internet of things（IoT）， that is， a large online network that connects all things and people． Fast internet speeds will be the key to developing this technology．The IoT could be used in a lot of ways． For example， with IoT， your refrigerator could automatically （自動地 ） place an order online for eggs when it finds that there are no eggs left inside．

【1】Which city was 5G tested for the first time？

A. Beijing．

B. Shanghai．

C. Shenzhen．

【2】What can we infer（推測） according to the passage？

A. 5G is widely used in China now．

B. 5G networks will make our lives more convenient．

C. There are no symbols at the top of our phones．

【3】The writer uses self﹣driving cars as an example to ．

A. explain how 5G's fast speed can be helpful

B. warm about the possible dangers of self﹣driving cars

C. explain how self﹣driving cars work

【4】What is IoT according to the passage？

A. A robot that can do housework．

B. An online store where you can buy anything．

C. A large online network that connects things and people．

【5】Which sentence is right according to the passage？

A. 5G will help us buy eggs quickly．

B. Robots can help us buy eggs online．

C. Our refrigerator can order eggs online for us．

【答案】

【1】B

【2】B

【3】A

【4】C

【5】C

【解析】

當人們看手機上方的時候，會看到3G或者4G的小符號．G代表手機網(wǎng)絡的"代"．但是，當5G網(wǎng)絡全面覆蓋時，這些符號將會成為過去時，3月30日，上海市長吳清第一次使用華為Mate X智能手機進行視頻通話，上海成為中國進行第一個測試5G的城市，5G將會在很多方面改善人們的生活。

【1】細節(jié)理解題。根據(jù) Shanghai has also become the first city in China to start testing 5G networks．可知，上海是中國第一個進行5G測試的城市。故選B。

【2】推理判斷題。根據(jù)About 100 times faster than 4G networks， 5G will let people download and upload data（數(shù)據(jù)） faster than ever before． But 5G won't just bring faster mobile internet． People can use it for many other things well．可知，5G的速度將會是4G的100倍，人們下載或者上傳數(shù)據(jù)都會快很多．而且，5G不僅僅是在移動網(wǎng)絡上給人們帶來快捷．在其他方面，人們也可以利用5G．由此可以推斷出，5G將會使人們的生活便利很多。故選B。

【3】推理判斷題。根據(jù)…With 5G， this lag will be greatly lowered， making the cars safer．可知，5G可以大大減少問題延遲，從而使無人駕駛汽車更安全．作者通過這個例子來告訴我們5G的告訴怎樣起作用的。故選A。

【4】詞義猜測題。根據(jù)5G could also be used to power the internet of things（IoT）， that is， a large online network that connects all things and people．可知，IoT指的是把所有人和物聯(lián)系起來的一個巨大的在線網(wǎng)絡。故選C。

【5】細節(jié)理解題。根據(jù)For example， with IoT， your refrigerator could automatically （自動地 ） place an order online for eggs when it finds that there are no eggs left inside．可知，當冰箱里沒有雞蛋時，冰箱可以自動在網(wǎng)上下單買雞蛋。故選C。

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