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1 . 如图所示的三棱锥A-BCD中,令
,
,
,且M,G分别是BC,CD的中点,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc03a3ba496faee748a8d63e5d4fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381985fdee6a1ac3ad4a73f5f653b84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc09d87cf940d0e0c1f7ce6640b15fd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-06-04更新
|
179次组卷
|
2卷引用:陕西省榆林市第一中学2023-2024学年高二上学期期中考试数学试题
名校
2 . 已知空间三点
,
,
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6dcd362a44588747e88b206e7c5ca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4caba22130af21cbde75bd92ba2aea8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7caeeea2761360cf6ab346e7259b3fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbaeae7045ad94158cdf5ae97073bc17.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
3 . 已知椭圆
上有一点P到右焦点的距离为4,则点P到左焦点的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c732a50945ba0d08a4e3e0c4796c74.png)
A.6 | B.3 | C.4 | D.2 |
您最近一年使用:0次
2024-05-29更新
|
202次组卷
|
2卷引用:陕西省榆林市第一中学2023-2024学年高二上学期期中考试数学试题
4 . 已知
,
,则p是q的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc11e9183ffccd297df4a1c18618bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcaf6c835001bd10ed0848767f020bca.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分又不必要条件 |
您最近一年使用:0次
2023高三上·全国·专题练习
5 . 命题“
且
”的否定形式是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c45652c7f3b1edd06a64a960d9f899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ebbc663960ae18efcf94ee01683595.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2023高三上·全国·专题练习
6 . 已知命题
若
,则
命题
若
,则
在命题①
②
③
④
中,真命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67303a54055cf262f1e86ef4b04adc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8b7a58977d945746870cfb93ea7018.png)
![](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/74a260a35c3eee25831df954e4f56315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f2c9b79767e6ded620edba63701bcc.png)
A.①③ | B.①④ | C.②③ | D.②④ |
您最近一年使用:0次
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7 . 如图,在平行六面体
中,
为
的交点.若
,则向量
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f05389f5270a557638d69fc0b0f9f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad6afd51e8d1edcf96dc140caae9edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfb9769a14ebf5cbc5fa0c06ce96435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1b000652db5cf562b3e0711f6a6b7a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 已知平面
的法向量分别为
,则这两个平面的位置关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6853c1e102814f6bf87686c02e8add.png)
A.平行 | B.相交但不垂直 | C.相交垂直 | D.不能确定 |
您最近一年使用:0次
9 . 已知函数
,则“
是偶函数”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f3546ae33c15a22ef762d907736348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e7490f5a6ddb2feae7b184cc9d4dca.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
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10 . 已知双曲线的方程为
,则该双曲线的焦距为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa4714c98ff5ed7679c197ca6c49a41.png)
A.2 | B.4 | C.![]() | D.6 |
您最近一年使用:0次
2024-04-16更新
|
341次组卷
|
2卷引用:山东省烟台市2023-2024学年高二上学期期末考试数学试卷