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最新最全的文档下载- 海南省海南中学2018届九年级中招模拟考试（一）数学试题
海南省海南中学2018届九年级中招模拟考试（一）数学试题
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题号 | 一 | 二 | 三 | 总分 | 核分人 |
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第Ⅰ卷 客观题
第Ⅰ卷的注释
| 一、单选题（共12题) | ||||||
1. 为了保证2018年博鳌亚洲论坛年会的顺利召开，海南省各部门投入了约89000名工作人员为其服务。将89000用科学记数法可表示为（ ）
A．89×103 | B．8.9×10 4 | C．8.9×103 | D．0.89×105 |
2. 由五个相同的小正方体堆成的物体如图1所示，它的主视图是（ ）![](https://wkrtcs.bdimg.com/rtcs/image?w=84.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_4","w":"84.00","h":"83.00","dataType":"png","c":"word/media/image1.png","imgOriW":84,"imgOriH":83})
A． | B． | C． | D． |
![](https://wkrtcs.bdimg.com/rtcs/image?w=86.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"86.00","h":"71.00","dataType":"png","c":"word/media/image2.png","imgOriW":86,"imgOriH":71})
![](https://wkrtcs.bdimg.com/rtcs/image?w=81.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"81.00","h":"68.00","dataType":"png","c":"word/media/image3.png","imgOriW":81,"imgOriH":68})
![](https://wkrtcs.bdimg.com/rtcs/image?w=69.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"69.00","h":"68.00","dataType":"png","c":"word/media/image4.png","imgOriW":69,"imgOriH":68})
![](https://wkrtcs.bdimg.com/rtcs/image?w=61.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"61.00","h":"68.00","dataType":"png","c":"word/media/image5.png","imgOriW":61,"imgOriH":68})
3. 数据21，12，18，16，20，21的众数和中位数分别是（ ）
A．21和19 | B．21和17 | C．20和19 | D．20和18 |
4. 如图，直线a∥b，∠1=85°，∠2=35°，则∠3=（ ）![](https://wkrtcs.bdimg.com/rtcs/image?w=121.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_4","w":"121.00","h":"100.00","dataType":"png","c":"word/media/image6.png","imgOriW":121,"imgOriH":100})
A．85° | B．60° | C．50° | D．35° |
5. 如图，在平面直角坐标系中，![](https://wkrtcs.bdimg.com/rtcs/image?w=36.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_4","w":"36.00","h":"21.00","dataType":"png","c":"word/media/image7.png","imgOriW":36,"imgOriH":21})
位于第二象限，点的坐标是，与关于y轴对称，再将向下平移4个单位长度得到，则点的对应点的坐标是（ ）
A． | B． | C． | D． |
![](https://wkrtcs.bdimg.com/rtcs/image?w=40.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"40.00","h":"21.00","dataType":"png","c":"word/media/image14.png","imgOriW":40,"imgOriH":21})
![](https://wkrtcs.bdimg.com/rtcs/image?w=43.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"43.00","h":"21.00","dataType":"png","c":"word/media/image15.png","imgOriW":43,"imgOriH":21})
![](https://wkrtcs.bdimg.com/rtcs/image?w=43.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"43.00","h":"21.00","dataType":"png","c":"word/media/image16.png","imgOriW":43,"imgOriH":21})
![](https://wkrtcs.bdimg.com/rtcs/image?w=40.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_5","w":"40.00","h":"21.00","dataType":"png","c":"word/media/image17.png","imgOriW":40,"imgOriH":21})
6. 等腰三角形的一条边长为6，另一边长为13，则它的周长为（）
A．25 | B．25或32 | C．32 | D．19 |
7. 方程![](https://wkrtcs.bdimg.com/rtcs/image?w=57.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_4","w":"57.00","h":"42.00","dataType":"png","c":"word/media/image18.png","imgOriW":57,"imgOriH":42})
的解为（ ）
A．x=3 | B．x=4 | C．x=5 | D．x=﹣5 |
8. 某药品经过两次调价，每瓶零售价由81元升为100元，已知两次提价的百分率都为x，那么x满足的方程是（ ）
A．100（1+x）2=81 | B．100（1-x%）2=81 | C．81（1+x）2=100 | D．81x2=100 |
9. 如果将抛物线y=x2+2向下平移1个单位，那么所得新抛物线的表达式是（）
A．y=(x-1)2+2 | B．y=(x+1)2+2 | C．y=x2+1 | D．y=x2+3． |
10. 如图，⊙O的直径AB垂直于弦CD，垂足为E，∠A=22.5°，OC=4，CD的长为（ ）![](https://wkrtcs.bdimg.com/rtcs/image?w=140.00&md5sum=ee9787f849721c905fc82d05aebd9244&sign=d84c253015&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=490&ipr={"t":"img","r":"r_4","w":"140.00","h":"118.00","dataType":"png","c":"word/media/image19.png","imgOriW":140,"imgOriH":118})
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