1 . 用适当的符号(“
”、“
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”“
”“
”)填空
2______
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2
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2 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
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;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c839c42ca4cfdd2bbe2f1b5f2666dcf.png)
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;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
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.
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3 . 时间经过
(时),时针转了______ 度,等于______ 弧度;若时针长度是1厘米,则时针
(时)转出的扇形面积是______ 平方厘米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c63f6b1652d3e830ed2dbc65253d043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15694733427d51a02995963186c5c427.png)
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4 . 如图,我国的一艘海监船在D岛海域例行维权巡航,某时刻航行至A处,此时测得其东北方向与它相距16nmile的B处有一艘外国船只,且D岛位于海监船正东
处.观测中发现,此外国船只正以每时4nmile的速度沿正南方向航行.为了将该船拦截在离D岛12nmile处,不让其进入D岛12nmile内的海域,则海监船的航向为________ ,其速度的最小值为________ .(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62bde4e7b46d11c496c9a3795c24ade3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51fd2c4780079be8c3a2b82f5554f922.png)
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名校
解题方法
5 . 解关于
的不等式
.(只需结果,不需过程)
可因式分解为_____________________ .
当_________________ 时,解集为_____________________ ;
当_________________ 时,解集为_____________________ ;
当_________________ 时,解集为_____________________ ;
当_________________ 时,解集为_____________________ ;
当_________________ 时,解集为_____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ffbac75dc3443857f7b626c6aa2c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510ce4b3a2844e8defbeda04ebf33e42.png)
当
当
当
当
当
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6 . 某兴趣小组为了了解本校学生的课外阅读情况,对学校2000名学生进行了问卷调查,统计整理并绘制了如下两幅统计图.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/b4899c42-3c28-4977-8c53-712e08da428b.png?resizew=488)
请根据上述信息解答下列问题:
(1)本校各年级人数扇形统计图中,“九年级”所对应的圆心角的度数为_____________ ;
(2)阅读书籍数量最多的年级是___________ ,这一年级阅读的书籍总量是___________ ;
(3)本校平均书籍阅读量是___________ 本.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/b4899c42-3c28-4977-8c53-712e08da428b.png?resizew=488)
请根据上述信息解答下列问题:
(1)本校各年级人数扇形统计图中,“九年级”所对应的圆心角的度数为
(2)阅读书籍数量最多的年级是
(3)本校平均书籍阅读量是
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