函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161710122335584/SYS201310221617101223355009_ST/0.png)
的定义域是
.
考点分析:
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如图所示,同时自由转动两个转盘,指针落在每一个数上的机会均等,转盘停止后,两个指针同时落在奇数上的概率是
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如果关于x二次三项式x
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在▱ABCD中,
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等于( )
A.
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B.
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C.
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D.
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如图是根据某班40名同学一周的体育锻炼情况绘制的条形统计图.那么该班40名同学一周参加体育锻炼时间的众数、中位数分别是( )
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A.16,10.5
B.8,9
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