回答下列问题。
1. What's your name?
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2. What's your number?
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3. What class are you in?
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4. Where are you from?
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5. What are you?
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6. What's your father?
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7. What's your aunt?
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8. How old are you?
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9. Do you like English?
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10. What do you like?
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11. What's five and ten?
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12. Is two and nine twelve?
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，在悬挂点等高，档距为1时，最大弧垂fm(ym)出现在
。