Question

【题目】 You're probably used to the regular upgrades in our cell-phone networks. There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.

But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast. The arrival of 5G also means enormous leaps forward in capacity－so much that every cell-phone plan will offer cheap, truly unlimited Internet access. “The consequences of that are huge,” says Sherif Hanna, Qualcomm's director of 5G marketing. For example, apps will no longer degrade (降低) your video quality or postpone downloading when you're out of Wi-Fi range. In fact, you'll probably prefer to do your downloads when you're on cellular (使用流量) because 5G will be much faster than whatever service you've got at home or work.

“However, not everyone is excited by the 5G development. The new standard gets its speed partly by using existing transmission(传输) frequencies more efficiently and partly by using the millimeter wave range. That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use,” Hanna says.

These frequencies are much higher than anything we've used for the cellular, which means they can offer unbelievable speed－but at the cost of range. Millimeter wave cellular towers have to be about 500 feet apart. Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安装) a lot more of them as well.

That's why the millimeter wave flavor of 5G, the superfast coverage, will be available only in densely populated cities such as New York and San Francisco. In suburban and rural areas, 5G will bring a speedup of “only” nine times faster.

【1】What advantages does 5G have over previous networks?

A.5G is much faster and more convenient.

B.5G allows users to download more videos.

C.5G can provide better service and news at home.

D.5G cell-phone plans are expensive but more accessible.

【2】Hanna's words in paragraph 3 reflect .

A.popularity of the coming of 5G

B.easy access to the 5G development

C.concern about the 5G development

D.excitement about the 5G development

【3】What can we learn about 5G according to the text?

A.It requires more cellular towers.

B.It won't be available in rural areas.

C.It won't show speed improvements in suburbs.

D.It makes some populated cities even more crowded.

【4】Where is the text most likely from?

A.A tour brochure.B.A science newspaper.

C.A medical magazine.D.An experimental textbook.

Answer 1

【答案】

【1】A

【2】C

【3】A

【4】B

【解析】

本文是说明文。文章介绍了5G网络的一些基本情况。

【1】细节理解题。根据第二段中的But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast.（但5G的发展比以前大得多。当然，在现实世界中，5G比4G快得多，5G城市中的5G手机将享受9到20倍的网速）可知，5G手机的网速将大幅度提高。由此可知，与以前的网络相比，5G更快、更方便。故选A。

【2】推理判断题。根据第三段中的“However, not everyone is excited by the 5G development…That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use,” Hanna says.（汉纳说:“然而，并不是每个人都对5G的发展感到兴奋……这是一个巨大的、有趣的无线电频率线，目前还没有得到充分利用，因为毫米波真的很难使用。”）可知，汉纳认为并不是每个人都对5G的发展感到兴奋，这种无线电频率线，目前还没有得到充分利用。由此推知，汉纳在第3段中的话反映了对5G发展的担忧。故选C。

【3】细节理解题。根据第四段中的Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安装) a lot more of them as well.（手机运营商不仅要升级他们所有的手机收发器(称为小型小区)，还要安装更多的收发器）可知，5G不仅需要手机运营商升级他们所有的手机收发器，还要安装更多的收发器。由此推知，5G需要更多的手机基站。故选A。

【4】推理判断题。根据第一段中的There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.（1991年出现的2G, 2001年被3G取代，2009年又出现了4G。现在我们听到了5G的到来）可知，本文主要介绍了5G网络的一些基本情况。5G网络的发展属于科技进步，结合选项可知，本文应该来自科学报纸。故选B。