根据Then in Utah in 1912, policeman Lester Wire developed the first electric traffic light system with red and green lights. Two years later, the first electric signal was installed in Cleveland.可知,故选B。 根据整段的叙述可知,作者是按照时间顺序介绍交通信号灯的发展历史的。故选B。 反馈 ...
aThe Rose Festival is a traditional festival of Bulgaria.The first Rose Festival was in 1903. 罗斯节日是Bulgaria.The第一1903年节日是的罗斯一个传统节日。 [translate] awich place? 哪个地方? [translate] ause the train instead. 改为使用火车。 [translate] aTechnical secondary school students 技术...
【答案】electricity;electric【核心短语/词汇】save electricity节约用电;turn off关掉【翻译】为了节约用电,我们应该在自然光线充足时关掉电灯。【解析】考查词性变化。save electricity节约用电,固定搭配短语。turn off the electric lights关掉电灯,the electric lights意思是电灯,electric是形容词,作定语修饰名词lights。
electrical distribution or lighting equipment was involved in more than 36,000 home structure fires each year. Since these causes ranked first for property damage and third among major fire causes, as well as causes of fires leading to injuries and death, flickering light bulbs should not be tak...
aBuildings were often designed without concern for daylighting potential as a source of usable light. Electric lighting is unnecessary when good daylighting is available. 大厦经常被设计了,不用关心为采光潜力作为能用的光的来源。 当好采光是可利用的时,电照明设备是多余的。[translate]...
The idea for traffic lights began in the 1800s when a system was required to control the ever-increasing flow of horse-drawn traffic.In 1868,in London,a signal was installed(安装) at the crossing of George Street and Bridge Street,near Parliament.This provided walkers a safe crossing.The ...
The nominal reason for daylight saving time has long been to save energy. The time change was first instituted in the U.S. during World War I, and then reinstituted again during WW II, as a part of the war effort. During the Arab oil embargo, when Arab members of the Organization of...
“Oh, really? I don’t think she is s4enough. I will teach her how to speak to me. Whipping is the only way black people l5.” A few days later Adolph, another slave, went to talk to Tom. “Do you know that Mrs St Clare is going to sell us? I was b6the curtains(窗帘) ...
Thomas Edison lit up the world with his invention of the electric light.Without him,the world might still be in the dark.However,the electric light was not his only invention.He also invented the motion picture camera and 1200 other things.About every two weeks he created something new. Thom...
当我们打开电气开关,灯就亮了 翻译结果3复制译文编辑译文朗读译文返回顶部 当我们打开电气开关,灯就亮了 翻译结果4复制译文编辑译文朗读译文返回顶部 当我们把在一个电开关、轻的是关于 翻译结果5复制译文编辑译文朗读译文返回顶部 当我们起动一个电开关时,光打开 ...