已知正项等差数列{an}的前n项和为Sn，其中a1≠a2，am、ak、ah都是数
题型：解答题
问题：
| 已知正项等差数列{an}的前n项和为Sn，其中a1≠a2，am、ak、ah都是数列{an}中满足ah-ak=ak-am的任意项． （Ⅰ）证明：m+h=2k； （Ⅱ）证明：Sm•Sh≤Sk2； （III）若
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题型：解答题
请根据表格中的内容完成句子。
John是一个独立、细心的孩子，他每周都要简单总结一下自己的生活。
1. It was rainy last Monday. John _____________ on the playground (操场).
2. It _____________ cold last Tuesday. John _____________ pizza at the restaurant.
3. It was _____________ last Wednesday. John _____________ to the park in the afternoon.
4. It was _____________ last Thursday. John _____________ a film at the cinema.
5. It _____________ _____________ last Friday. John _____________ a kite in the park.
