百度知道 - 信息提示

The article mainly in the outline subjective happy heart's concept and in our country peasant laborer's present situation's foundation, discusses the peasant laborer subjective happy heart the research main point: Including peasant laborer subjective happy heart influencing factor and research aim. Provides the background frame and the instruction direction for the peasant laborer subjective happy heart's research. 后面的:[abstract]: The article mainly in the outline subjective happy heart's concept and in our country peasant laborer's present situation's foundation, discusses the peasant laborer subjective happy heart the research main point: Including peasant laborer subjective happy heart influencing factor and research aim: Studies the farmer subjective happy heart from the culture and education degree dimension related. Provides the new angle and the rich research variable dimension for the peasant laborer subjective happy heart's research. [key word]: Peasant laborer subjective happy heart influencing factor years of schooling

这周，为了加强我们对距离-时间和速度-时间概念的理解，我们要探索一些基本的数学概念。这周我要求你们用applet（一种java程序），app（一种计算机应用程序），拓展插件或者是那种能够加强我们数学课测量确定性的在线的“游戏”，有效数字用“+”/-”或者"x"和“/”,舍入规则也一样。一旦你找到了网站，玩了游戏或是使用了程序，然后请给其他同学写段关于其实用性和建议的评论。 tips：好多词很陌生，不明所以，估计是专业知识。只能帮你倒这儿了。凑合着看，没有比我好的请采纳~