名校
1 . 把下列各式因式分解:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfdb71089c581d4a65a944f18fcfc40.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a9bcbc55d73d2a4babcdbffcbe767c.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c453f99cdb9720028730eeda963af59c.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfdb71089c581d4a65a944f18fcfc40.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a9bcbc55d73d2a4babcdbffcbe767c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c453f99cdb9720028730eeda963af59c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ba88559de978f7bc67c13ffdd68b20.png)
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2 . 已知
且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd4d16cd99889e66aedca09ad344b4d.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64724e5b93a28328a0556d41309696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd4d16cd99889e66aedca09ad344b4d.png)
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3 . 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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4 . 观察下列关于x的单项式,探究其规律:
,按照上述规律,则第2020个单项式是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9ccb85ad1a181da01d6c45ea1f673e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 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.![]() ![]() |
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6 . 在
中,
,若
,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9a7d5b5aaa6c73bd2ea6ef7c7a51d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.60 | D.80 |
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7 . 某地区
年元旦的最高气温为
,最低气温为
,那么该地区这天的最低气温比最高气温低( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151e5633a5d0cc30b254167e3dda5803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5a9089d9a44abd4667373073af0096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384cb9a621cc2a4a009f53bf62257612.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 下列图形中,只是中心对称图形而不是轴对称图形的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 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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10 . 函数
中自变量
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e575925106069560a5f218df5ce0051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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