1 . 直线
的一个方向向量
则
与直线
的夹角为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a25ab2832b8d1e5bd4c8fb440565d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
您最近一年使用:0次
13-14高一下·四川资阳·期末
名校
2 . 如图,
的
边长为
,
分别是
中点,记
,
,则
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844515840/STEM/c84dfcef31194835bb0c4c1a41af2c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce1e07d1031dd1208dca2528f25fb57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1027d1dead0c4e4351a50f45a051caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63404a6da223146b50ece9918c3a364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaee68b99d6e767daae1fe065011fcfc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573007838855168/1573007844515840/STEM/c84dfcef31194835bb0c4c1a41af2c23.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2016-12-04更新
|
306次组卷
|
3卷引用:上海市上海中学2018-2019学年高二上学期期中数学试题
3 . 已知
是
内一点,且满足
,记
、
、
的面积依次为
,则
等于________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf963beea63513855e70359c6bf077e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2694c32ca1e120e988012b7ecd74f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5dbede0ae298e66ca5af37df8754aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b280088a8f97b52c2145bc709434e7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1627178de6edc574614a630f65775709.png)
您最近一年使用:0次
名校
4 . 已知
、
、
为直线
上不同的三点,点
直线
,实数
满足关系式
,有下列结论中正确的个数有 ( )
①
;
②
;
③
的值有且只有一个;
④
的值有两个;
⑤ 点
是线段
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1151f8c08cbf023437e179bbeac74132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee21177a6c6f8778f4400f2de3f94165.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c594ce8ea75457957753206eacf5e7.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d40d19588540c14a1fc1a4532146a2.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
⑤ 点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2015-06-04更新
|
542次组卷
|
2卷引用:上海市奉贤中学2018-2019学年高二上学期10月月考数学试题