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【多选题】
平均数的作用()A.
反应总体的一般水平
B.
对不同时间、不同地点、不同部门的同质总体平均数进行对比
C.
测定总体各单位的离散程度
D.
测定总体各单位分布的集中趋势
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举一反三
【简答题】影响旅游者态度改变的因素包括哪些?
【简答题】绘制如下等轴测图并按图示进行标注。
【单选题】Modern industrial society grants little status to old people. In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life ...
A.
no formal systems exist in modern industrial society
B.
old people have no status in modern industrial society
C.
young people have chances in modern industrial society
D.
knowledge changes rapidly in modern industrial society
【简答题】It benefits us a lot to study the humanities. But we 1. to miss many opportunities if we study the humanities alone. We should try our best to become 2. and 3. skillful to meet the needs of modern lif...
【简答题】试画出独立光伏发电系统的示意图。
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