(2008•大兴安岭)函数
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中,自变量x的取值范围是
.
考点分析:
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(2008•大兴安岭)如图,将△ABC沿DE折叠,使点A与BC边的中点F重合,下列结论中:①EF∥AB且EF=
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AB;②∠BAF=∠CAF;③S
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A.1
B.2
C.3
D.4
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(2008•大兴安岭)已知5个正数a
1,a
2,a
3,a
4,a
5的平均数是a,且a
1>a
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3>a
4>a
5,则数据:a
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3B.a,
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a,
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D.
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,
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(2008•大兴安岭)关于x的分式方程
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C.m<-5时,方程的解为负数
D.无法确定
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