真题
1 . 抛物线
的焦点坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6deb111a4452382f1b355bb29d0b30e4.png)
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2 . 已知
,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b171a841a4cbdc3dcc2525fe71689efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5754d49487357469b2176a3816a05cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce5e8c9425762d1948baca7c2210d67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5e1e33c1259195f7bb0198a3e6f65a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
4 . 为了解推动出口后的亩收入(单位:万元)情况,从该种植区抽取样本,得到推动出口后亩收入的样本均值
,样本方差
,已知该种植区以往的亩收入
服从正态分布
,假设推动出口后的亩收入
服从正态分布
,则( )(若随机变量Z服从正态分布
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1e75c0fb70228642ce0bcde6a71349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a23d14a37c1a373f8a8c6dbceab073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b983d819103e25258261b4cca5a8c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9750907d86afd23d16fd4d09df24bde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b1ecb95a3f7eb469cd959c570dec34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6945ae476e29d63ec39c37e92be040f4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
5 . 已知
,且
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e533b8b204982c7d42001a20b9548a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d76ee2e81f447f84a3e0b39c0388ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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真题
6 . 设全集
,集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2143cff1201a49034668264e48d1e17.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4f59a3fd052f229e79e5aefa517913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141bca64b2f409a93f2a7a9d5a32d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2143cff1201a49034668264e48d1e17.png)
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7 . 已知气候温度和海水表层温度相关,且相关系数为正数,对此描述正确的是( )
A.气候温度高,海水表层温度就高 |
B.气候温度高,海水表层温度就低 |
C.随着气候温度由低到高,海水表层温度呈上升趋势 |
D.随着气候温度由低到高,海水表层温度呈下降趋势 |
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8 . 曲线
在
处的切线与坐标轴围成的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afd544220ffdc0c5368e69c0016e41d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edaef66a0582e95fb5c57a405acdea9a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 已知
,
,且
是奇函数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8066c2d6115e3ede16f0bfa2f42f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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真题
10 . 已知
为第一象限角,
为第三象限角,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292d729b44dd285370df8b0d4ca4f83.png)
_______ .
![](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/3ed4e997f39b42b14e66de808562cd79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d22d4624a11130c947cb4e32a06c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292d729b44dd285370df8b0d4ca4f83.png)
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