问题
填空题
已知圆锥的底面半径为2cm，母线长是4cm，则圆锥的侧面积是______cm2（结果保留π）．
答案
底面圆的半径为2，则底面周长=4π，侧面面积=
×4π×8=8πcm2．1 2
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已知圆锥的底面半径为2cm，母线长是4cm，则圆锥的侧面积是______cm2（结果保留π）．
底面圆的半径为2，则底面周长=4π，侧面面积=
×4π×8=8πcm2．1 2
| 阅读下列短文，选择正确的答案。 |
| All the cities are quite the same. Living in a modern Australian city is not very different from living in an American city. But there are some differences on farms. In many parts of the world, farmers and their families live in villages or towns. In the United States, each farm family lives in its own fields. Usually their neighbors live far away. It's hard for them to see each other on weekdays. Their children take school buses to the nearest schools. These schools are only for the farm families in this area (地区). In some areas, there are small schools for a few farm families,and the children walk to schools. Life keeps changing for everyone. So do farmers. Today there are cars, good roads, radios, television sets and there are modern machines for farming. All of these are changing farm life. |
| 1. Living in a modern Australian city is almost living in an American city. |
[ ] |
| A. different from B. comfortable like C. the same to D. the same as |
| 2. Usually farm families live in . |
[ ] |
| A. big cities B. the country C. the island D. every town |
| 3. The farmers in can visit each other easily on weekdays． |
[ ] |
| A. the world B. America C. Australia D. the United States |
| 4. How do the farmers' children go to school? |
[ ] |
| A. They ride their bikes to schools. B. They only walk to schools. C. They can go to schools in a car. D. They can take school buses or walk to schools. |
| 5. What about the farmers' life now? |
[ ] |
| A. Their life is poor. B. Their life is changing. C. They don't like their life. D. Their life is comfortable. |