When did people start to use wind to produce electricity? A. Several centuries ago. B. At the beginning of the 19th century C. In the mid-19century. D. At the E. nd of the 19th century 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
When we did the experiment of static electricity, a plastic rod was rubbed with a piece of cloth and it attracted some small pieces of paper. This phenomenon shows that ___. A. the plastic rod becomes magnetic B. the plastic rod has positive charge C. the plastic rod has negative charge...
【题目】When Ben Franklin lived, people did not know much about electricity. Ben wascurious about it. He knew it could make sparks. He sometimes saw the sparks when heput his key into a lock.One day it was raining. Ben looked at a flash of lightning. It looked like a big spark.He...
andreducingelectricityusagearesomegreatwaystostart.Reduce,ReuseandRecyclewillhelp conservenaturalresourcesandenergy.Itwillalsosaveyouandyourcommunity.Besuretostart doingyourparttosaveourbeautifulhometoday! ( )1.WhydidIPCCreleaseitsfirstassessmentofclimatescience? A.Toappealtopeopletoreducecarbonlevels. B.Tostate...
The electricity can be used right away. This energy can also be stored and used later. People use bicycle - powered energy to run small devices(设备),such as small televisions and fans. They often use less than 100 watts per hour. However,it would be a mistake to use pedal power to ...
1. Old people can improve blood circulation by ___. A.listening to music with the reading penB.enjoying the mopping machine working. C.using the electric foot basinD.cleaning their faces 2. Which of the followings is TRUE? A.Kids
Electricity hardly gains a fair start before the internal combustion engine overtakes it.(电力刚获得一个好的开头,而内燃机又赶上了它。) 可见不但不用过去完成和过去动词,而且用了现在完成和现在动词。这样一来,更可表示二者之间,为时极暂,简直是相接连了。
26、e at night and the station was 46 of people. They were waiting to buy tickets of the last train. He bought the 47 ticket. And he was very happy. At that time, a woman with a crying baby walked to him. She asked him to give her the ticket. So he did. He thought they nee...
原创力文档创建于2008年，本站为文档C2C交易模式，即用户上传的文档直接分享给其他用户（可下载、阅读），本站只是中间服务平台，本站所有文档下载所得的收益归上传人所有。原创力文档是网络服务平台方，若您的权利被侵害，请发链接和相关诉求至2885784724@qq.com 电话：400-050-0827(电话支持时间：9:00-18:30) ...
A.Rich people. B.Sick people. C.Travellers. D.Workers.4. When it was first used. what did the word "restaurant" refer to? A.A person. B.A place. C.Illness. D.Soup.5. When did restaurants begin to grow internationally? A.In the 1600s. B.In the 1700s. C.In the 1800s. D....