问题
选择题
到一个三角形三个顶点距离相等的点有（ ）
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答案
答案：A
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到一个三角形三个顶点距离相等的点有（ ）
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答案：A
| 阅读理解。 |
| Skin-diving (潜水) is a new sport today. This sport takes you to a new wonderful world. It is like a visit to the moon! When you are under the water, it is easy for you to climb big rocks (岩石), because you are no longer (不再) heavy. Here, under the water, everything is blue and green. During the day, there is enough light. When fish swim nearby, you can catch them with your hands. When you have a tank (罐) of air on your back, you can stay in deep (深) water for a long time. But you must be careful when you dive in deep water. To catch fish is one of the most interesting parts of this sport. Besides (除此以外), there are more uses for skin-diving. You can clean ships without taking them out of the water. You can get many things from the deep water. Now you see the skin-diving is useful and interesting. |
| 1. Skin-diving is going to take you to _____. |
[ ] |
| A. the deep water B. be in danger C. mountains |
| 2. You can climb big rocks easily under the water because _____. |
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| A. you are stronger B. the fish nearby help you C. you are lighter than on land |
| 3. Under the water, a skin-diver _____ in the daytime. |
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| A. can see everything clearly B. can't see anything clearly C. can see nothing |
| 4. With a tank of air on your back, you can _____. |
[ ] |
| A. catch fish very easily B. stay under the water for a long time C. have more fun |
| 5. From the passage we can know that skin-diving is _____. |
[ ] |
| A. harmful B. not useful C. useful and interesting |