2024年100所名校高考模拟金典卷 24新高考·JD·英语-Y 英语答案

2024年100所名校高考模拟金典卷 24新高考·JD·英语-Y 英语答案，目前2024卷临天下答案网已经汇总了2024年100所名校高考模拟金典卷 24新高考·JD·英语-Y 英语答案的各科答案和试卷，获取更多{{papers_name}}答案解析，请在关注本站。

本文从以下几个角度介绍。

1、2023-2024全国100所名校高考模拟金典卷英语4
2、2024100所名校高考模拟金典卷英语四答案
3、100所名校高考模拟金典卷2024英语二
4、100所名校高考模拟金典卷英语2024答案
5、100所名校高考模拟金典卷2024英语1
6、2023-2024一百所名校高考模拟金典卷英语二答案
7、2023-2024100所名校高考模拟金典卷英语十二
8、2024全国100所名校高考模拟金典卷英语
9、100所名校高考模拟金典卷英语2024听力
10、100所名校高考模拟金典卷英语一2024

30.What can we learn from the passage?A.Space exploration settles differences between nations.B.The longing for solving problems on Earth is universal.C.Mastering more than one language is a trend among astronauts.D.Cooperation in the space field bridges the gap between cultures.CLighting has come a long way since Tom Edison lit his first incandescent bulb(白炽灯泡)in the 1880s.LED bulbs are popping up everywhere now,on planes,car headlights,in yourphone.And engineers are exploring more ways to use LEDs-everything from wireless datastreaming to secure communication systems and in-flight networking.Engineer Harald Haas,co-founder of pureLiFi,explains how LEDs can be used totransmit information,"LEDs have the property that we can change the light thatcomes out of an LED very,very quickly.That change in the brightness is what weexploit in order to encode data extremely fast,so that a receiver will then see thesechanges in the light intensity in a way a human eye would not be able to detect.Thenwe have algorithms (to recover these changes and get back the data stream.There are many advantages to using LEDs to transmit information.For one thing,LEDs can communicate much faster than WiFi.What's more,the visible lightspectrum (is about ten thousand times larger than the radio spectrum.Thiswould allow communication systems to not only use a spectrum that's already been setup,but vast amount of free spectrum,which is in cars,in our LED lights at home,instreetlights and so on."It's ubiquitous.It's already there,"Haas says.LiFi would also be more secure than WiFi.Because light can't go through walls,people would not be able to log on to LiFi networks in the same way that they're ableto log on to and eavesdrop on (ongoing WiFi communications.Haas argues thatLiFi would also be available in places where communication is typically difficult whenwe can't use radio.One interesting application could be to use car headlights to communicate withother drivers on the road."We can use these LEDs to transmit data from car to car.Normally you see the car in front of you,but if you were able to relay high-definitionvideo from,say,three cars in front of you,you could see earlier what's happening.This is a way we can enhance safety on our roads,"Haas says.高二英语第7页（共10页）