分解因式:2a2-4a= .
考点分析:
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反比例函数y=
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图象上有三个点(x
1,y
1),(x
2,y
2),(x
3,y
3),其中x
1<x
2<0<x
3,则y
1,y
2,y
3的大小关系是( )
A.y
1<y
2<y
3B.y
2<y
1<y
3C.y
3<y
1<y
2D.y
3<y
2<y
1
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将点A(4,0)绕着原点O顺时针方向旋转60°角到对应点A′,则点A′的坐标是( )
A.(4,-2)
B.(2,
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)
C.(2,
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)
D.(
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,-2)
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把不等式-2x<4的解集表示在数轴上,正确的是( )
A.
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B.
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C.
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D.
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一个正方体的表面展开图如图所示,则原正方体中的“★”所在面的对面所标的字是( )
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A.花
B.红
C.刺
D.桐
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