The word horsepower was first used two hundred years ago. James Watt had mad

游客2023-10-02 32

问题 The word horsepower was first used two hundred years ago. James Watt had made the world’ s first【B1】______used steam engine. He had no way of telling people【B2】______how powerful it was, for at that time there were no units for measuring power. Watt decided to【B3】______how much work one【B4】______horse could do in one minute. He called that unit one horsepower. With this unit he could measure die work his steam engine could do. He【B5】______that a horse could lift a 3,300-pound weight 10 feet into me air in one minute. His engine could lift a 3, 300-pound weight 100 feet in one minute. Because his engine did ten times as much work as the horse, Watt called it a ten horsepower engine. [br] 【B5】

选项

答案 discovered

解析 discover意为“发现”，作谓语。

转载请注明原文地址:https://www.tihaiku.com/zcyy/3063590.html

相关试题推荐

随机试题

最新回复(0)

The word horsepower was first used two hundred years ago. James Watt had mad

Companiessometimesreceivehundredsofapplicationsforasinglejob,andi

Companiessometimesreceivehundredsofapplicationsforasinglejob,andi