Question

【题目】 All networks like 3G and 4G will be things of the past, because 5G will be reachable in the near future. So, what’s so special about a 5G future? First, its download speed can be as fast as 20GB/s, which is 100 to 200 times that of 4G. But what’s more impressive is 5G’s low delay rate. Now 4G takes 200 milliseconds to send and receive information. But 5G will get it down to 1 millisecond.

5G is going to change the way equipment connects to the Internet. And self-driving cars may be one of the biggest breakthroughs to come out of 5G. The self-driving car under 5G network could react to hundreds of cars around it within 1 millisecond. It’ll prevent car accidents and end traffic jams completely.

5G can benefit us in other ways. Operations could be performed by robots controlled by experts from the other side of the world. Factories can be staffed by robots that can communicate their tasks to each other, and they can do more work over a 5G network. Imagine a group of drones(无人机) flying over a field of crops. Then farmers won’t have to work so hard anymore.

But, 5G is not perfect. One major shortcoming has to do with why it’s so fast. 5G uses the millimeter waves, while 4G uses the 15 to 40 centimeter-long waves. And shorter waves go fast but not very far. On 4G networks, the signal can go 10 kilometers. But the 5G signal can go at most 300 meters, and it can’t even go through walls or rain.

【1】How does the author show us 5G’s advantages in Paragraph I?

A.By giving examples of the uses of 5G.

B.By making comparisons between 4G and 5G.

C.By explaining the scientific principles of 5G.

D.By analyzing 5G’s development from 4G.

【2】According to the author, the self-driving cars will ___________.

A.cause more car accidents.

B.slow down 5G’s development.

C.run without being connected to the Internet.

D.have a much faster reaction speed than humans.

【3】What does the underlined part “ be staffed by robots” in paragraph 3 mean?

A.Be built by robots.

B.Have robots as workers.

C.Offer employees home robots.

D.Produce more medical robots.

【4】What does the last paragraph mainly talk about?

A.The main weakness of 5G networks.

B.How to make 4G networks more perfect.

C.The types of long waves and short waves.

D.How to improve the communication in rainy days.

Answer 1

【答案】

【1】B

【2】D

【3】B

【4】A

【解析】

这是一篇说明文。文章介绍了5G的优势和劣势。

【1】推理判断题。根据第一段中First, its download speed can be as fast as 20GB/s, which is 100 to 200 times that of 4G. But what’s more impressive is 5G’s low delay rate. Now 4G takes 200 milliseconds to send and receive information. But 5G will get it down to 1 millisecond.“首先，它的下载速度可以达到20GB/s，是4G的100到200倍。但更令人印象深刻的是5G的低延迟率。现在，4G需要200毫秒来发送和接收信息。但5G将把时间缩短到1毫秒。”由此判断出，第一段通过比较4G和5G来展示5G的优势。故选B。

【2】细节理解题。根据第二段中The self-driving car under 5G network could react to hundreds of cars around it within 1 millisecond. It’ll prevent car accidents and end traffic jams completely.“5G网络下的自动驾驶汽车可以在1毫秒内对周围的数百辆汽车做出反应。它可以预防交通事故，彻底消除交通堵塞。”可知，根据作者的说法，自动驾驶汽车的反应速度将比人类快得多。故选D。

【3】词句猜测题。根据第三段中they can do more work over a 5G network.“他们可以通过5G网络做更多的工作。”可知，划线部分的意是“让机器人做工人。”故选B。

【4】段落大意题。根据最后一段中But, 5G is not perfect. One major shortcoming has to do with why it’s so fast. 5G uses the millimeter waves, while 4G uses the 15 to 40 centimeter-long waves.“但是，5G并不完美。一个主要的缺点是它为什么这么快。5G使用毫米波，而4G使用15至40厘米长的波。”可知，最后一段主要是关于5G的劣势。故选A。