函数y=
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最小正周期T为
.
考点分析:
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如图,半径为1的半圆O与等边三角形ABC夹在两平行线l
1,l
2之间,l∥l
1,l与半圆相交于F,G两点,与三角形ABC两边相交于E,D两点.设弧
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的长为x(0<x<π),y=EB+BC+CD,若l从l
1平行移动到l
2,则函数y=f(x)的图象大致是( )
A.
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B.
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C.
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D.
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过点(
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)引直线l与曲线y=
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相交于A,B两点,O为坐标原点,当△ABO的面积取得最大值时,直线l的斜率等于( )
A.
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B.
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C.
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D.
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如果,正方体的底面与正四面体的底面在同一平面α上,且AB∥CD,正方体的六个面所在的平面与直线CE,EF相交的平面个数分别记为m,n,那么m+n=( )
A.8
B.9
C.10
D.11
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阅读如下程序框图,如果输出i=5,那么在空白矩形框中应填入的语句为( )
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A.S=2*i-2
B.S=2*i-1
C.S=2*I
D.S=2*i+4
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若S
1=
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x
2dc,S
2=
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dx,S
3=
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e
xdx,则 S
1,S
2,S
3 的大小关系为( )
A.S
1<S
2<S
3B.S
2<S
1<S
3C.S
2<S
3<S
1D.S
3<S
2<S
1
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