1 . 单项式
的系数是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e014ba165d8b007249c97be4e590c3f2.png)
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2 . 若空间四边形
的两条对角线
的长分别是8,12,则过
的中点
且平行于
的截面四边形的周长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c06c3dd8b12d1cdfd5fb66b0d6568d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b93f77f3887084f97658c81d8a1af45d.png)
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2016-12-01更新
|
1040次组卷
|
4卷引用:2011-2012学年安徽省太湖中学高一第二学期期中考试数学试卷
(已下线)2011-2012学年安徽省太湖中学高一第二学期期中考试数学试卷(已下线)2010-2011学年福建省南安一中高二下学期期末考试数学(文)人教A版 全能练习 必修2 第二章 第二节 2.2.3 直线与平面平行的性质人教A版高中数学必修二2.2.2平面与平面平行的判定2
名校
3 . 如图,在等腰梯形
中,
,对角线
于点
,
,
,垂足分别为
、
,
,
,则
等于( )
![](https://img.xkw.com/dksih/QBM/2020/11/7/2588054244679680/2592877909073920/STEM/75755a13628a49cb9ed3b274b80b92ae.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c826d790b1efb02bbd2acfc3b26e8e.png)
![](https://img.xkw.com/dksih/QBM/2020/11/7/2588054244679680/2592877909073920/STEM/75755a13628a49cb9ed3b274b80b92ae.png?resizew=210)
A.9 | B.10 |
C.11 | D.12 |
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