1 . 在四面体
中,
与
互相垂直,
,且
,则四面体体积的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ba108d7d2d4807f2c74a22e536fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280aaf7973d8ef68845fa8a24101082c.png)
A.4 | B.6 | C.8 | D.4.5 |
您最近一年使用:0次
解题方法
2 . 设
,当
变化时
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd54a4134aef3f68a9c068ee4dade284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf27e0ac992edacdf11c649113e9445e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 中国女排精神代代相传.某网站对出战2024年巴黎奥运会的中国女排12人大名单进行了预测:主攻队员4人,副攻队员3人,二传和接应各2人,自由人1人.在中国女排每场比赛7人的首发阵容中,主攻和副攻各2人,二传和接应各1人,自由人1人.如果按照该网站预测的12人大名单出战,首发阵容方案数为( )
A.144 | B.140 | C.72 | D.36 |
您最近一年使用:0次
4 . 如图所示,已知一质点在外力的作用下,从原点
出发,每次向左移动的概率为
,向右移动的概率为
.若该质点每次移动一个单位长度,设经过5次移动后,该质点位于
的位置,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44601dd2b96423c6b5a76948a3c11db0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 设
,则对任意实数
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba7c05a0dc7f162fb73b17101bfe6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa38a1bd5bc252a8578b23737d0d46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0929250c9250852da75fdc5d207d5f4.png)
A.必要而不充分条件 | B.充分而不必要条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
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解题方法
6 . 已知等边
的边长为1,点
分别为
的中点,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35afaafb9232be2798dfadf872217c21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68028d33ab8a11b4cd40ecfdd253b1d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 设函数
.若实数
使得
对任意
恒成立,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ddf48f76beaa3c1247157892bea6de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6600d4eaf69d7c52b2807da79ae3d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35752a15613c2009617851faa6559eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb2f87452a6a5fe9dd73766b16d66bf.png)
A.![]() | B.0 | C.1 | D.![]() |
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解题方法
8 . 已知复数
满足
,则复数
在复平面对应的点在( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6dfdde80c1a7d451a9f05b999cab4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
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9 . 在
中,内角
所对的边分别为
已知
的外接圆半径
是边
的中点,则
长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832a6ae04b25ef0896bd607cdcda60ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904cfd440c5acd15d2c16aa830faebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e3476a6ec1a527dc6abbee1f74ac14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 已知抛物线
的焦点为
,动点
在
上,点
与点
关于直线
对称,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6ce39c72b38fa1a2b3275188b27689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db0a1cbf7b0ed76c443b953af8734d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c19ec66bbb4cefd58395ed4f3e54979.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次