[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 题目和参考答案——青夏教育精英家教网—

题目内容

【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.

【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。

练习册系列答案

增加：在缺词处加一个漏字符号（∧），并在下面写出该加的词。

删除：把多余的词用斜线（﹨）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

My first stay at home alone was very memorable. One day when I was twelve, both my mother and father were away on the business and I had to be all by myself for two days. My parents left early the first day, but I got up soon after they left. The first evening I was a little scare, so I turned on all the light. I actually keep the light on in my bedroom the whole night, that finally put me at ease. For fear of get up late the next morning, I put three alarm clocks near my bed and set the alarm respectively at 6: 00, 6:10 and 6: 15. In order to prove that I could take good care of me, I washed my own clothes the next day, though I could wait Mum to do it. I really felt proudly of myself and thought I had grown up.

【题目】—Won’t you go shopping with your mother?

—Unless she ____ to buy me a new sweater.

A.will promiseB.promisedC.promisesD.is promising

【题目】（题文）听下面一段较长对话，回答以下小题。

【1】（小题1）On what does the man agree with the woman?

A. Finding a nice roommate isn’t easy.

B. It isn’t necessary to have another roommate.

C. Their host doesn’t like meeting new people.

【2】（小题2）Why does the woman mention Wimbledon?

A. She met a really rude host there.

B. She lives with untidy persons there.

C. She rented a shabby apartment there.

【3】（小题3）What kind of person would the man like to have as a roommate?

A. A quiet man.

B. A clean person.

C. A foreign student.

【题目】听下面一段较长对话，回答以下小题。

【1】What does the man ask the woman to do?

A. To buy him soft drinks.

B. To buy him some vitamins.

C. To buy him some burgers.

【2】How does the man find vitamin pills?

A. Important. B. Effective. C. Useless.

【3】What kind of food does the man usually eat?

A. Fruit. B. Fast food. C. Vegetables.

【题目】听下面一段较长对话，回答以下小题。

【1】What’s the man’s first reaction to the woman’s words?

A.He thinks it’s convincing.B.He thinks it’s inspiring.C.He thinks it’s impossible.

【2】What does the man think the girl lacks?

A.Talent.B.Friends.C.Diligence.

【3】What’s the girl doing?

A.Having a talk.B.Taking an interview.C.Calling her parents.

【题目】听下面一段较长对话，回答以下小题。

【1】Which kind of flat did the woman want to live in?

A. A flat near a bus station. B. A flat near the university. C. A flat near a supermarket.

【2】How many bedrooms does the woman need in the flat?

A. One. B. Two. C. Three.

【3】What will thewoman probably do next?

A. Have a look at the flat.

B. Go to buy some furniture.

C. Rent the flat immediately.

【题目】A British businessman with the lifelong dream of building a yacht (游艇) has almost achieved his goal. Mike Ludgrove is putting the finishing touches on the 60ft boat that he has spent the past 12 years crafting by hand. He has spent several thousands of hours on the classic sailing yacht that he has named “Helena”.

Ludgrove originally thought that he could complete his dream yacht in just three years. He soon realized, however, that both the timeline and budget were overly ambitious. To raise more funds, Ludgrove and his kind wife Elaine sold their London flat, their primary home in Exeter, Devon, and now live in a rented house. Five years ago, the couple sold their food business to raise additional money for the boat. Ludgrove also asked his son and some friends to work alongside him to make his dream a reality.

“Helena has been my dream for almost 40 years,” Ludgrove, who started working on the project in 2006, told the Daily Mail. “It has taken 12 years, and I have enjoyed most of it, although there have been some low points when I’ve wondered whether we were going to make it.

The boat is coated with fiberglass to protect the wood and has a captain’s room and two large cabins which can accommodate up to six people.

Ludgrove claims that his dream was inspired by a childhood experience when he participated in the London Sailing Project, a charitable foundation that gives young people the opportunity to experience a sailing adventure. “Helena” is due to launch, and Ludgrove hopes it will benefit young people who usually don’t have a chance to sail.

【1】What does the underlined sentence in Para. 2 mean?

A. Building a yacht was impossible for Ludgrove.

B. It was wrong of Ludgrove to build a yacht by hand.

C. Ludgrove was trapped in a lack of time and money.

D. The problems of timeline and budget were easy to solve.

【2】What are the attitudes of Ludgrove’s family and friends to his yacht-building plan?

A. Indifferent. B. Doubtful.

C. Objective. D. Supportive.

【3】Why was Ludgrove determined to build a yacht?

A. It was his childhood dream.

B. It was part of his worldwide sailing plan.

C. He never sailed in the sea.

D. He wanted to memorize “Helena”.

【4】What will Ludgrove do with “Helena” most probably?

A. Give it to the London Sailing Project for renting.

B. Inspire young people to have a chance to sail.

C. Set up a charitable foundation for “Helena”.

D. Sail around the world with his family and friends.

【题目】—I’d been standing there for several minutes before he ________ my presence.

—He must have been absorbed in his reading.

A.neglectedB.maintainedC.registeredD.revealed

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