1 . 已知
,观察并找规律,计算
的结果是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf97e84debf6d2df3920d585a8930ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3689dc9626426d7e40a86be1523a4f.png)
A.42 | B.120 | C.210 | D.840 |
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2 . 与《九章算术》的类似题,今有善行者每刻钟比不善行者多行六十尺,不善行者先行两百尺,善行者行八百尺追上.设善行者每刻钟行
尺,则列方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知:点
在
上,点
在
上,
和
相交于点
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21ba36b2d2b82f18e7fb548c9a12766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26b33f5b71039c35ac5e93795e254f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/9671368f-911e-4d5c-8daf-61ec72d82e77.png?resizew=177)
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4 . 列二元一次方程组解应用题:某大型超市投入15000元资金购进A、B两种品牌的矿泉水共600箱,矿泉水的成本价和销售价如表所示:
(1)该大型超市购进A、B品牌矿泉水各多少箱?
(2)全部销售完600箱矿泉水,该超市共获得多少利润?
类别/单价 | 成本价(元/箱) | 销售价(元/箱) |
A品牌 | 20 | 32 |
B品牌 | 35 | 50 |
(2)全部销售完600箱矿泉水,该超市共获得多少利润?
您最近一年使用:0次
名校
5 . 如图,等边
的三个顶点都在
上,
是
的直径.若
,则劣弧
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/2/a4760dcd-8918-49cb-9aff-c6223a1695ce.png?resizew=131)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
6 . 若一元二次方程
有两个不相等的实数根,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9080124b199b1e89dc16d0e12af028dd.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
名校
7 . 为保证中小学生每天锻炼一小时,某校开展了形式多样的体育活动项目,小明对某班同学参加锻炼的情况进行了统计,并绘制了下面的统计图(1)和图(2),则扇形统计图(2)中表示“足球”项目扇形的圆心角的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/454ad148-6835-4ac3-bf94-1fa0e590d7fb.png?resizew=415)
A.45° | B.60° | C.72° | D.108° |
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名校
8 . 为庆祝2015年元旦的到来,学校决定举行“庆元旦迎新年”文艺演出,根据演出需要,用700元购进甲、乙两种花束共260朵,其中甲种花束比乙种花束少用100元,已知甲种花束单价比乙种花束单价高20%,乙种花束的单价是多少元?甲、乙两种花束各购买了多少?
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名校
9 . 已知
,则x的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f436c527cb7ca18d8195e5a2f1b0c34f.png)
您最近一年使用:0次
名校
10 . 如图,在
中,
,
,
,
,
,
分别为
,
,
的中点,连接
,
,则四边形
的周长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc50ecfa45216f8d098662452cf8d08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/9a65700a-94c7-4aa3-b25c-f6325d6355dc.png?resizew=161)
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