2025年教学资料:2022-2023学年第二期高一中职数学期中考试模拟测试题答案解析
参考答案:1.D【分析】由圆的一般方程化为标准方程即得.【详解】∵圆C的方程为x2+y2+2x−4y−4=0,∴(x+1)2+(y−2)2=9,∴圆心C的坐标为(−1,2).故选:D.2.A【分析】根据函数的对称性与单调性即可得到结果.【详解】函数y=log2|x|是偶函数,且在(0,+∞)上为增函数,结合各选项可知A正确.故选A【点睛】本题主要考查函数图象的识别和判断,利用函数奇偶性和对称性的关系以及特殊值进行排除是解决本题的关键.3.B【分析】将直线的一般式化为斜截式即可求解.【详解】由3x+y−1=0,化为斜截式得y=−3x+1,所以直线3x+y−1=0的斜率为−3.故选:B.4.D【分...
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