10-11高一下·黑龙江大庆·开学考试
1 . 函数
的一个对称中心是
![](https://img.xkw.com/dksih/QBM/2011/3/25/1577382440157184/1577382441320448/STEM/9d4ecfbc64f7400aa6204202c1c994c9.png?resizew=116)
A.![]() | B.![]() | C.![]() | D.![]() |
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10-11高一下·黑龙江大庆·开学考试
2 . 已知
,且
是第四象限的角,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df727f71d7f09832d2475f12d9b9821d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0084bf729f01f2fc41451f5ff295083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df727f71d7f09832d2475f12d9b9821d.png)
A.![]() | B.![]() | C.±![]() | D.![]() |
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10-11高一下·黑龙江大庆·开学考试
3 . 已知
中,
,
,
的对边分别为
三角形的重心为
.
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e16965b76e9302c5d63d177cf36000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f2e07c7d33985d4b447f87cabe16cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f693e870d5ccdced6e023cc4f7d621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c79f975d766486cd369ca057413e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90d7f054e8f0346479e1999622f11cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe136360ef22b283e05dc8e24fe3a8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e16965b76e9302c5d63d177cf36000.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10-11高一下·黑龙江大庆·开学考试
4 .
时,不等式
恒成立,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b8e9bb1e11d02cc2190a6e5ede4293.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3418ccc0b3589f7b1c25035458152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10-11高一下·黑龙江大庆·开学考试
5 . 将函数
按向量
平移后的函数解析式是
![](https://img.xkw.com/dksih/QBM/2011/3/25/1577382440157184/1577382441361408/STEM/0ec9eb5ed4f64344b48470c6e3c7b52e.png?resizew=69)
![](https://img.xkw.com/dksih/QBM/2011/3/25/1577382440157184/1577382441361408/STEM/289032c94f6f412a9872bb7a742da773.png?resizew=81)
A.![]() | B.![]() |
C.![]() | D.![]() |
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