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【单选题】
数学是人们对( )定性把握和定量刻画、逐渐抽象概括、形成方法和理论,并进行广泛应用的过程。
A.
事物
B.
客观世界
C.
物体
D.
量
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【单选题】Why does the man dislike living in the city?
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【简答题】平面束的方程A 1 x+B 1 y+C 1 z+D 1 +λ(A 2 x+B 2 y+C 2 z+D 2 )=0是否包含所有过直线 的平面.
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【单选题】设集合A={(x,y)|x 2 +y 2 ≤1},集合B={(x,y)|log |x| |y|≤log |y| |x|,|x|<1,|y|<1},则在直角坐标平面内,A∩B所表示的平面区域的面积为 [ ]
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【单选题】Why does the man dislike living in the city?
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