It was Children's Day yesterday, we 1the park. Our teacher was 2us.

    3 many people there. Some Young Pioneers (少先队员)4 near the river.

    5 sang and danced. There were some6 on the river. There was a hill

    7. Some boys8 in the river. We sat under 9 apple tree with our teacher. We 10on Children's Day yesterday.

读图，比较图中河流abc三处的位置与三幅断面图，回答下题．

①有利于不断增强公有制经济的控制力

②表明非公有制经济地位提升

③将为各类产权的保护提供法律保障

④有利于各种资本形式交叉持股、相互融合

人的生活离不开营养物质和氧气，同时还需要排出体内产生的代谢废物．人体是一个统一的整体，各个系统之间存在着密切的联系．下图是人体进行消化吸收、呼吸、循环、排泄等生理活动的部分结构示意图，请据图回答下列问题（ 中填标号，_____上填文字）：