Question

    The race to 5G is on. All four major US carriers now have some form of 5G wireless, although it’s all limited roll-outs in only a few cities, mostly using expensive phones that won’t support future nationwide 5G networks. We’re tracking the roll-outs monthly on our Race to 5G page.

The early 5G roll-outs are more like a public test than a final product. AT＆T, Verizon, and T-Mobile are all using technologies that only travel about 800 feet from a cell site, which means there isn’t much coverage. All four carriers are waiting for upgrades（升级）to their base stations that will improve coverage, speed, and reliability. Around the end of this year or the beginning of 2020, AT＆T, Verizon, and T-Mobile all intend to launch 5G networks that use the existing 4G spectrum（频谱）, which will have slower speeds but broader coverage.

We’ve tested AT＆T in Dallas and Las Vegas Sprint in Dallas and New York; Verizon in Chicago, New York, and Providence; and T-Mobile in New York. Every month, we’ve been seeing better performance and more new devices. It’s messy. It’s very early days. And if you like new technology, it’s very exciting.

In previous mobile transformations, we’ve seen most of the big changes happening years after the first announcement. Take 4G, for instance. The first 4G phones in the US appeared in 2010. But the sorts of 4G applications that changed our world didn’t appear until later. So following that plan. While we’re getting a little bit of 5G right now, you should expect the big 5G applications to crop up around 2021 or 2022.

5G stands for fifth-generation-cellular（蜂窝状的）wireless, and the initial standards of it were set at the end of 2017. But a set of standards doesn’t mean that all 5G will work the same-or that we even know what applications 5G will enable. There will be slow but responsive 5G, and fast 5G with limited coverage.

1.What is the present state of 5G in the US？

A.Initial exploration. B.Great improvement.

C.Wide application. D.Extensive promotion.

2.Why does the author take 4G for example？

A.To persuade carriers to give up 5G.

B.To remind people of 4G’s importance.

C.To prove 5G takes time to make a greater difference.

D.To show 5G has failed to meet expectations.

3.What’s the author’s attitude to 5G？

A.Cautious. B.Skeptical.

C.Opposed. D.Objective.

4.What’s the best title for the text？

A.Race to 5G B.5G is coming

C.How fast is 5G？ D.What is 5G？

Answer

1.A

2.C

3.D

4.B

【解析】

本文是一篇说明文。主要介绍了5G时代来临，尽管目前覆盖有限，发展缓慢，但是反应灵敏，有良好的前景。

1.推理判断题。根据第一段的All four major US carriers now have some form of 5G wireless, although it’s all limited roll-outs in only a few cities, mostly using expensive phones that won’t support future nationwide 5G networks.（所有四大美国运输公司现在都有某种形式的5G无线，尽管仅在少数几个城市有限推广，主要使用不支持未来全国范围的5G网络的昂贵的手机，）可推断，美国目前5G的现状还在初步探索阶段。故选A。

2.推理判断题。根据倒数第二段的In previous mobile transformations, we’ve seen most of the big changes happening years after the first announcement.（在以前的移动转换中，我们已经看到大部分的大变化发生在第一次发布之后的几年）接下来以4G为例说明这个观点，美国第一批4g手机出现在2010年，但改变我们世界的4g应用程序直到后来才出现。 所以按照那个计划。 虽然我们现在的5g仅有少量，大量的5g应用程序使用被期待会在2021或2022年左右出现。因此推断作者以4G为例，是为例证明5G需要时间才能做出更大的改变。故选C。

3.推理判断题。根据最后一段的There will be slow but responsive 5G, and fast 5G with limited coverage.可知，作者认为5G发展将会缓慢但是反应热烈的，覆盖有限但是快速。因此推断作者对5G的态度是客观的。故选D。

4.主旨大意题。根据第一段的The race to 5G is on.（5G时代开始了）和第二段的The early 5G roll-outs are more like a public test than a final product.（早期的5g推出更像是一个公共测试，而不是最终产品。）以及最后一段的There will be slow but responsive 5G, and fast 5G with limited coverage.（5G缓慢但反应灵敏，快速，覆盖有限。）可推断，文章主要介绍了5G竞赛正在发展，尽管有限但是快速，如同4G一样，需要一定的时间发展。因此推断B“5G时代来临”为最佳标题。故选B。