百度试题 结果1 题目When were the first modern traffic lights invented? A. In 1903. B. In l908. C. In 1912. 相关知识点: 试题来源: 解析 C [解析] 反馈 收藏
Telephone, calculator, car, personal computer, TV, light bulb, alarm, clock, microwave oven, electric slipper. Teacher: There are many useful things in the world. They help us a lot in life. (Show some pictures on the screen) When were they invented?Students: ___.①The telephone was ...
2 Many people in old days played the early form of this modern game. Cuju(蹴鞠), a ball-kicking game in China, was reported as early as 2, 500 B. C. . Around the same time in Greece, people were also playing a similar ball game without using their hands. But mod ern soccer ...
The squares were only there for twenty days, but in that time they produced enough power to make a TV work 1,400 hours! Imagine putting these squares under all the streets in Tokyo. One day, we may turn our streets into power stations!We can also use body heat. Every day, 250,000 ...
traffic lights. The idea of having a third “warning” light, was also patented by African-American inventor, businessman Garrett Augustus Morgan, Sr. in the year 1923. In the 1920’s, several automated traffic signals were installed in major cities around the world. The modern traffic light...
B.The apples were thrown by the same student.C.Somebody was once hurt by thrown waste there.D.The school may find out about the problem and set new rules. 免费查看参考答案及解析 题目: When were the cars invented A.In 1885.B.In 1842.C.In 1927. 免费查看参考答案及解析 题目: How ...
on the screen to the students: Telephone, calculator, car, personal computer, TV, light bulb, alarm, clock, microwave oven, electric slipper. Teacher: There are many useful things in the world. They help us a lot in life. (Show some pictures on the screen) When were they invented?
It is said that they were invented by Zhuge Kongming, also known as Zhuge Liang. Zhuge Kongming watched the direction of ___ and made a sky lantern with a message for help. Today, sky lanterns are used at festivals and other celebrations. People get together to fly them into the night...
boywereliftedout. Buttheboy wasn?toutoftrouble.Hehad lackedoxygenlongenoughthathewasn?tbreathing.Hewasplacedonhisside,andanadulthit himhardontheback.Itwasonlywhen Madison heardhimcrythatsheknewhewasallright.It tookMadisonlongertorecoverthantheboy,who wastakentohospitalandlefthospitalthatsame night.She,...
Unit9 Whenwasitinvented?Period2SectionA 2a---2c electricity/ilektrisəti/n.电；电能 In moderncitieswecan’tlivehappilywithoutelectricity.知识拓展 electricity 电，名词；如Noelectricity,nomodernlife.没有电就没有现代生活。electric，形容词，电的，如electriclight；电灯；electr...