名校
1 . 已知m,n为空间中两直线,
,
为两不同平面,已知命题
若
,
,则
;命题
若
,
,
,
,则
.则p,
,
,
这四个命题中真命题的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539a38ada26356d73024fb8533449c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b610e3c5b3d78a5730e7f3d736ac28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539a38ada26356d73024fb8533449c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042a14e1c3c915ad11544c9e1e57da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808c6d37467a5c995d71e49408503927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4ded3c4bc7a2212f2a0eb5f9753de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91f6e960a6e58be7d6e716bc8e56920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75e02007b9f26aa9d9d2c7c5336e6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023f27651898c2b97ac82242d32177a8.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2 . 已知命题P:单位向量的方向均相同,命题q:实数a的平方为负数.则下列说法正确的是
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-09-11更新
|
319次组卷
|
3卷引用:重庆市区县2018-2019学年高二下学期期末数学(理)试题
3 . 已知命题
,
,
,
,有下列命题:
①
;②
;③
;④
.其中真命题是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510464eabf0d8c1d03d67f79be19cbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad4e13675773aa73edb90977c509a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9395bb671c68b418ec6931cfc8366e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25502e2eb59aadd27fd50f41de87b8c.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2431aa4b275bf0478bb944e90e18a1ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df555956505b2a9ac2fbc061adcff221.png)
A.①② | B.①③ | C.②④ | D.③④ |
您最近一年使用:0次