Assume that having fun is your normal state, but having no fun is as unpleasant as receiving a grade that is two letters lower.
假设有娱乐是你的常态，如果没有娱乐，给你的感觉就像成绩下降两级一样。
Methods The students form a normal secondary school and those of Grade two , Grade four , Grade six form a primary school are chosen as the subject for the experiment.
方法选取小学四年级和六年级的学生作为实验对象，采用自行设计的学业成绩奖励模式与现有的学业成绩奖励模式作为自变量进行比较实验。
The quality character of water lying to transition-state between two-connected Grade was analyzed by applying Normal Distribution and Probability.
用概率分布理论分析处于相邻类别水质过渡状态水体的水质属性。
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