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—No words are strong enough to express our heartfelt thanks for your assistance. —________.
11个月前
—Would you like some pop? —________. I would like some tea.
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范讽,字补之,以荫补将作监主簿。知平阴县。会河决王陵埽,水去而土肥,失阡陌,田讼不能决,讽分别疆畔,著为券,民持去不复争。
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完成下列反应的文字表达式,在括号内注明反应类型(选填“化合”、“分解”) (1)铁丝在氧气中燃烧 ______________________________.
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已知公差不为0的等差数列{an}满足a1,a3,a4成等比关系,Sn为{an}的前n项和
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