问题
填空题
在Rt△ABC中，AD是斜边BC上的高，如果BC=a，∠B=30°，那么AD等于（ ）。
答案
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在Rt△ABC中，AD是斜边BC上的高，如果BC=a，∠B=30°，那么AD等于（ ）。
| 用方框中所给词的正确形式完成对话 | |
B: I've been to Korea 2 my parents. A: Did you 3 a good journey? B: Certainly. We visited places of 4 . A:I hear you are going 5 to Australia for the summer holidays. B: Yes, I’m 6 to my hometown to see my grandparents. A : How long are you going 'to stay there? B: Less 7 two months. And I'll be back to school 8 new term 9 . A : How long will your family stay in Korea? B: We won't 10 Korea until my father finishes his work. |