Question

【題目】 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(無人機) 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】

這是一篇說明文。文章介紹了5G的優(yōu)勢和劣勢。

【1】推理判斷題。根據(jù)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，它的下載速度可以達到20GB/s，是4G的100到200倍。但更令人印象深刻的是5G的低延遲率�，F(xiàn)在，4G需要200毫秒來發(fā)送和接收信息。但5G將把時間縮短到1毫秒。”由此判斷出，第一段通過比較4G和5G來展示5G的優(yōu)勢。故選B。

【2】細節(jié)理解題。根據(jù)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網(wǎng)絡下的自動駕駛汽車可以在1毫秒內(nèi)對周圍的數(shù)百輛汽車做出反應。它可以預防交通事故，徹底消除交通堵塞。”可知，根據(jù)作者的說法，自動駕駛汽車的反應速度將比人類快得多。故選D。

【3】詞句猜測題。根據(jù)第三段中they can do more work over a 5G network.“他們可以通過5G網(wǎng)絡做更多的工作。”可知，劃線部分的意是“讓機器人做工人。”故選B。

【4】段落大意題。根據(jù)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。一個主要的缺點是它為什么這么快。5G使用毫米波，而4G使用15至40厘米長的波。”可知，最后一段主要是關(guān)于5G的劣勢。故選A。