学前教育活动评价的基本要素包括____________、____________、____________、____________。
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consumption energy harmony nature pollution protect recycle reserve sustainable waste
排列42531的逆序数是,它是排列。(填“奇”或“偶”)
1) The Internet has good effects on children’s lives. For example, the Internet has opened the world for everyone; we are 1.__________ to the world; we can learn about the events that are happening far away; we can all be part of a 2._________ 3.________ now.