| 阅读理解。 |
| Many years ago when people had no thermometers (温度计), they usually touched a thing to see how hot or cold it was. The following experiment shows how easy it was to make a mistake (错误). Take three glasses: the first one with hot water, the second one with very cold water and the third one with water at room temperature. Then you put a finger of one hand in the hot water, and a finger of the other hand in the cold water. You hold your fingers in the two glasses for a minute. Then you use the two fingers, one after another, to see how hot or cold the water in the third glass is. You will find that the water is warm to the finger that was in the cold water before, but the finger which was in the hot water will feel cold in the third glass of water. You will often make a mistake if you take something that seems to you for a real fact. That is why you must always find the temperature in a scientific way. You must not try to tell the temperature as it seems (好像) to you. |
| 1. The experiment tells us that sometimes it is _____ to make a mistake. |
| A. interesting B. difficult C. easy D. helpful |
| 2. The water in the third glass is _____. |
| A. colder than the water in the first glass B. hotter than the water in the first glass C. colder than the water in the second glass D. as cold as the water in the second glass |
| 3. What will you find if you put the finger which was in the first glass into the second glass according to (根据) the experiment? |
| A. The water is hotter than it is in the first glass. B. The water is as hot as it is in the first glass. C. The water is at the room temperature. D. The water is colder than it is in the first glass. |
| 4. How should we find the temperature according to (根据) the passage? |
| A. Try to tell as it seems to us. B. Try to use our fingers. C. Try to tell in a scientific way. D. Try to touch something to see how hot it is. |
| 5. You will often make a mistake if you take something that _____. |
| A. seems to you for a real fact B. is a real fact C. finds in a scientific way D. uses by your own hands |