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直线x+y=1与圆x2+y2-4x-10y+13=0的位置关系为 (填相交,相切...
直线x+y=1与圆x2+y2-4x-10y+13=0的位置关系为 (填相交,相切,相离之一)
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,若f(m+1)>f(2),则实数m的取值范围是( )
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D.m<-3或m>1
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①∠ABC=90°;
②k
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A.0 个
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C.2个
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已知四棱锥P-ABCD的三视图如图所示,则该四棱锥的侧面积为( )
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如图,在边长为1的正方体ABCD-A
1B
1C
1D
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1C
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D.无法计算
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