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下列抽取样本的方式是简单随机抽样吗?为什么?在机器传送带上每隔10件抽取一件产品作为样本这个问题也不知道产品是有限还是无限呀,题目的目的是判断什么呢?如果是有限的话就应该是简 断路器的额定开断电流、关合电流、开合电流都是什么意思?请举例说明,不要复制百度百科的内容,谢谢! 湖南省衡阳市的英语单词是什么啊 优美的拟人句 I often get into trouble with police. with policI often get into trouble with police. with police 做什么句子成分? wants,she,meet,on,me,Sunday,morning,to(.)连词成句 下列关于瞳孔的说法中,错误的是 A：光过强时瞳孔缩小B：看近物时瞳孔放大 c：瞳孔是虹膜中央的圆孔 D：瞳孔的大小可随光线的强弱而改变 给我理由,在线等,会做得来啊 They had a family meeting to discuss how ------[spend]the vacation aftern dinner yesterday evening.请在虚线上填写括号内的适当形式并[详细]解释,谢谢 They had a —— vacation.A、two months B、two--months C、two months` D、two month`s they teamed up with another family to rent a house for the summer vacation怎么翻译 The pancake smells badly,and we must throw it away.改错 30个好拟人句,20个好排比句,短点 关于矛与盾 鹬蚌相争 利用鹬蚌相争 ,渔翁得利写一篇作文. 用一句话概括鹬蚌相争渔翁得利的短文内容 寓言二则 矛与盾鹬蚌相争写作方法 They'll learn much more than l'll never know中文谐音 many optimists l know are q____ to point out that others more talented than they are. It turned out that the only people___she can depend.填写什么?whom 但是这个句子有两个要点,当only修饰先行词时,关系代词不是要用that吗? Do Ben and his family need Halloween costumes? 鹬蚌相争（原文） 鹬蚌相争鹬蚌相争讲了一件什么样的故事 又说明了什么道理 杯弓蛇影 望梅止渴 买椟还珠 画蛇添足中哪个成语不同类? 宋庆龄介绍和故事宋庆龄的故事和介绍100字以内,快啊, 门店店长的年度总结怎么写要写年度总结,我是做办公用品的,, 怎样写影楼店长年终总结我是影楼店长及财务,不知道怎么写年终总结?有没有范文?救救小女子啊. 服装店长年终总结怎么写 店长年终总结范文 图为长江和黄河最终流入大海,提示是最终在一起了,猜四字成语 Don't eat the fish until it_____A.has cooked B.cooks C.will be cooked D.is cooked 英语翻译get(up to on) we like eating fish,but we don`t often cook it before we eat it猜国家名!还有一个 We like meat,bread,potatoes and vegetables best .Sometimes we eat kangaroos 宋庆龄小时候的故事