| 阅读理解。 |
| The horsepower was first used two hundred years ago. James Watt had made the world's first widely used steam engine. He had no way of telling people exactly how powerful it was, for at that time there were no units for measuring power. Watt decided to find out how much work one strong horse could do in one minute. He called that init one horsepower. With this unit he could measure the work his steam engine could do. He discovered that a horse could lift a 3,300-pound weight 10 feet into the 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. |
| 1. Watt made the world's first _____. |
| A. train B. engine C. steam engine D. bus |
| 2. Watt wanted to find a way _____. |
| A. to lift a 3,300-pound weight B. to show how useful his steam engine was C. to tell people exactly how powerful his steam engine was D. to measure the weight of his steam engine |
| 3. What does one horsepower mean? It means _____. |
| A. one horse's power B. what one strong horse can do in one minute C. what one horse can do in a day D. what work one horse can do as much as possible |
| 4. Which is not true? |
| A. Watt decided to find out how much work one strong horse could do in one minute. B. Watt decided to make the world's first widely used horse engine. C. He wanted to find a way to tell people exactly how powerful his engine was. D. He wanted to measure the work his engine could do. |
| 5. The best headline for the article is _____. |
| A. Horsepower B. Watt's steam engine C. A ten-horsepower engine D. The beginning of horsepower |