1966 AMC 12 第 2 题
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2.
若三角形的底边增加 ，而这条底边上的高减少 ，则面积的变化为：
When the base of a triangle is increased and the altitude to this base is decreased the change in area is:
增加
increase
增加
increase
减少
decrease
减少
decrease
其他年份的第 2 题
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