When__was__the__steam__engine___?A.inventB.inventedC.discoverD.discovered 相关知识点: 试题来源: 解析 解析:discover指“发现或找到”某种自然界本来已存在、但以前未被人类发现或认识的事物,invent指发明创造出自然界本来不存在的东西。答案:B 本语段选自《灰雀》,这篇课文讲述的是列宁、灰雀和一个孩子...
When the steam engine was invented in the 18th century, it began one of the greatest revolutions in our world. The invention of the petrol engine at the end of the 19th century led to another enormous change in our lives. And the computer is almost certainly going to be no less ...
A.when the steam engine was invented, it soon replaced water as a source of power, so water was useless for a certain period B.Factories could be built far from coal fields, because coal is portable C.It was convenient to build a factory in the coal fields ...
sconflictwithherson?A.Toleadintheuseofperiodintexting.B.Toemphasizethegreatpowerofwords.C.Toshowyoungsters?attitudestowardstexting.D.Tosuggesttherightuseofpunctuationmarks.( )6.WhyisJuanAbenanteRinconmentionedinthetext?A.Tomakeassessmentsontherecentstudy.B.Toconfirmthefindingsoftherecentstudy.C.Toputforwa...
Unit 6 When was it invented (时间:120分钟 分值:120分)第一部分 听力(共四大题,满分20分)Ⅰ.短对话理解(共5小题;每小题1分,满分5分)你将听到五段对话。每段对话后有一个小题,请在每小题所给的A、B、C三个选项中选出一个最佳选项。每段对话读两遍。( )1.What does the girl think is the mo...
When James Watt built his big steam-engines for industry, he invented a feedback device, a system which now plays a vital part in automation.Feedback【B1】that a machine can control its own【B2】. Watt"s invention was the "governor",【B3】task was to keep the engine speed【B4】, ...
When was the solar panel invented? What is the photovoltaic effect? Why are solar panels used in outer space? Editorial Contributors George Duval George Duval is a writer and expert in sustainability and environmental studies. After graduating with a B.A. in Sustainability from Florida International...
In 1903, the first controllable airplane was invented, and after World War I, it became a fast way to transport people and goods. After World War II, ___9___ and airplanes became popular as methods of transportation. Then, after high-speed rail was first introduced in Japan in 1964, ...
Tom saw a traffic accident when he ___ his bicycle along the road.A.ridesB.has rodeC.was ridingD.had rode 免费查看参考答案及解析 题目: —Can you tell me ___—Yesterday.A.when did he buy the carB.where did he buy the carC.when he bought the carD.where he bought the car 免...
It was invented in 1825, was invented by Sun Sun Sun Sun after several tests, using the principles of steam engines invented, when successful, heard voices and see if he will run, believe that the ghost, went home, closed the door, afraid to go out. He has become one the most importa...