问题
选择题
| 若△ABC中，AB=13，AC=15，高AD=12，则BC的长是（ ） |
| A. 14 B.4，14 C. 4 D. 5，14 |
答案
答案：B
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| 若△ABC中，AB=13，AC=15，高AD=12，则BC的长是（ ） |
| A. 14 B.4，14 C. 4 D. 5，14 |
答案：B
| 完形填空。 | ||||
| In most parts of the world, many students help their schools make less pollution. They join " 1 ". In a meaningful club, people work together 2 our environment clean. Here are some things students often do. No-garbage (废料,垃圾) lunches. How much do you throw away 3 lunch? Environment clubs ask students to bring heir lunches in bags that can 4 again. Every week, they will choose the classes that makes the least garbage and report them to the whole school. No-car day. On a no-car day, 5 comes to school in a car. Neither the students nor the teachers! Cars give pollution to the air. 6 remember: walk, jump, bike or run. Use your legs! It's lots of fun. 7 the water! Did you know that some toilets could 8 twenty to forty cubic (立方的) meters of water an hour? In a year, to your 9 , that would fill a small river! In environment clubs, students repair those broken toilets 10 . We love our environment. Let's work together and make it clean. | ||||
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