2021年外研版中考英语总复习专项训练阅读理解7 科技说明

1、阅读() 技说明AAir pollution is a big for cities in most countries. people are dying from it. But how can we tell the air quality is good or bad?In a tree next a river in Amsterdam, birdhouse bright green when the airis clean. If youre standing nearby, the birdhouse will also give you a free Wi-Fi connect

2、ionbut only if pollution level low enough. The designer is Joris Lam. His birdhouse tells you about the air quality.Joris birdhouse is TreeWifi. It be put on a tree around your house to test theair quality. can see a screen with information about the local air quality and how to improve it.TreeWifi

3、is simple way for to know about the air pollution around them. If the birdhousedoes not glow, people should care about the environment. It reminds them to change theirlifestyles. For example, to protect the air, they can bikes or just walk instead of driving cars.“Imagine if trees gave free Wi-Fi, p

4、eople would plant more trees like crazy. Its a pity that they only give the oxygen(氧气 we ” Joris said.The birdhouse doesnt work as home for birds now. Joris and his team are trying to make somechanges to it. In the future, they hope birds in the birdhouse and the heat of its green light will be used

5、 to keep birds warm in winter.1.What does the underlined word ” in Paragraph 1 refer to? ( )A.The birdhouse.B.Air quality.C.Air pollution.2.People can get a free Wi-Fi connection when .( )people are standing nearbythe pollution level is low enoughthe quality is enoughA.C.B.3.Joris designed screen fo

6、r the birdhouse to .( )A.receive the free Wi-Fi connectionB.protect the birdhouse from the C.show information about the air quality4.In the future, the birdhouse will also be used .( )A.as a home for birdsB.to tell us the C.to give us the oxygenB 2020淄博How can 仙掌 help the world? It can provide new k

7、ind of sustainable 可续燃料). Nopalimex, company Mexico, has made one of the world first cactus-powered factories.The idea to Sosain Nopalimex when he looking save money for his food factory.He now powers his factory with cactus 气). The cost to produce the gas is half the cost of electricity.Soon, the g

8、as produced by Nopalimex also be used in cars. Nopalimex gas is made usingthe prickly 刺梨a kind of cactus.To make the the prickly pear is mixed with manure(肥料. Then the mixture produces the gas can be used as fuel.Why cactus? Fuel can be made from other plants such corn, but there are a few reasons w

9、hycactus is a better First, prickly pears need very little water and very little care, andgrow well in hot temperatures. Today, these characteristics are key. Also, unlike corn, pricklypears dont need space that could be used for other food They can grow in areas where manyfood plants cant grow. Las

10、t, after making gas from prickly pears and manure, their byproducts( 产品) can be used to help grow food.Scientists still need to do more research on making and using As projectslike Nopalimex show, we have the possibility to produce sustainable fuel power our lives.1.How can cactus help the world?( )

11、A.By saving farmers money.B.By providing a new kind of sustainable fuel.C.By taking the place corn.D.By producing a lot of electricity and gas.2.Why does Sosa power his with cactus gas? ( )A.Because he wants to save money for his food factory.B.Because he has grown a lot of cactus and in his town.C.

12、Because he wants to be well-known around the D.Because he wants to grow cactus instead of corn.3.What does the underlined word “mixture in Paragraph 2 refer to?A.The Nopalimex company.B.The manure.C.The prickly pear and manure.D.Cactus.( )4.What is Paragraph 3 mainly ( )A.How cactus is to produce ga

13、s.B.Where we can grow a lot of cactus.C.What Nopalimex does with cactus.D.Why cactus is a choice to fuel.C 2020乐山Do you know 5G?It the fifth 代of mobile network technology. These new are coming.China just issued commercial 发放商用牌照 )for 5G on June 6, 2019.This means that China companies will be able to

14、 offer 5G networks for mobile phone users.Each mobile network generation faster and more powerful than the one before it. 1G let ustalk to each other. let us send messages. 3G gave us data and the Internet. And 4G made all these things faster. What special about 5G?5G has a very short delay between

15、and receiving information. Now, 4G takes about 100to 200 毫秒) to send and receive data. But 5G will get it to 1 millisecond or less is almost real-time.This big will only make our mobile Internet faster, also deeply change our Read on to find out 5G+entertainment(娱乐)5G networks are about times faster

16、 than means you can a movie in seconds using 5G.Also, virtual reality(VR) games will more popular with The short delay of 5G will make the games feel even more real.5G+transport5G will also bring us safer self-driving cars. These cars can send 信号) to each other.They also talk traffic and road 传感). 5

17、G will allow cars to 反)even faster than human drivers.5G+smart homes5G also makes of things possible. Internet of is a large network that everything to the Internet. Smart homes are part of For example, your toaster can 自动) start making breakfast after your alarmrings. And if its sensor feels the ai

18、r becoming dry, a smart 洒器 could water your plants by itself.1.What the writers writing the third paragraph? ( )A.To explain 5G is the best of all.B.To share his knowledge about C.To encourage people to use the new network technology.D.To show the development of mobile network technology.2.What does

19、 the underlined word “delay in Paragraph 4 mean in Chinese?( )A.卡顿C.暂停B.延时D.掉线3.Which of the following is not mentioned that 5G will peoples lives? ( )A.Health care.C.Transport.B.Entertainment.D.Smart homes.4.What will people do possibly with 5G according to the passage?A.Download a movie in B.Put e

20、verything onto Internet.( )C.Make self-driving cars safer.D.Make food more easily and 5.What the main idea of the passage? )A.5G will change our lives in many ways.B.Mobile networks are changing better.C.5G will make the things possible.D.5G networks for mobile phone users are 【参考答案】A 主旨大意本是一篇说明污染是一

21、个大问,设计师 Joris Lam 设计了一个鸟舍TreeWifi。 本文介绍了 TreeWifi 的能、用途、发展趋,提醒人们注意空气质量变,保护环境。1.C 代词指代题短第一段第一 pollution is a big problem for cities in most countries. Many people are dying from ”可知代词 it 指代面的 Air pollution。故选 C。2.A 细节理解题。根据文章第段中的If youre standing nearby, the birdhouse will also give youa free Wi-Fi connection but if pollution level is low enough. ”可知 ,当人们站鸟舍附近 而且污染水平足够低时才能获得免费的无线网络。故选 A。3.C 细节理解题。根据短文第段中的People can screen with information about the loc