2016年陕西省西安市碑林区西北工大附中中考数学八模试卷
一、选择题
1．5月是西安樱桃上市的季节，如果+3吨表示运入仓库的樱桃吨数，那么运出5吨樱桃表示为（ ）
A．﹣3吨 B．+3吨 C．﹣5吨 D．+5吨
2．下面几个几何体，主视图是圆的是（ ）
A．![](https://wkrtcs.bdimg.com/rtcs/image?w=67&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"67","h":"66","dataType":"png","c":"word/media/image1.png","imgOriW":67,"imgOriH":66})
B． C． D．
3．下列计算中，不正确的是（ ）
A．a2•a5=a10 B．a2﹣2ab+b2=（a﹣b）2
C．﹣（a﹣b）=b﹣a D．3a3b2÷a2b2=3a
4．如图，AB∥CD，AD=CD，∠1=70°30'，则∠2的度数是（ ）
![](https://wkrtcs.bdimg.com/rtcs/image?w=130&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"130","h":"121","dataType":"png","c":"word/media/image5.png","imgOriW":130,"imgOriH":121})
A．40°30' B．39°30' C．40° D．39°
5．如图，AB是⊙O的直径，弦CD⊥AB，∠CDB=30°，CD=2![](https://wkrtcs.bdimg.com/rtcs/image?w=20&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"20","h":"18","dataType":"png","c":"word/media/image6.png","imgOriW":20,"imgOriH":18})
，则S阴影=（ ）
![](https://wkrtcs.bdimg.com/rtcs/image?w=125&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"125","h":"114","dataType":"png","c":"word/media/image7.png","imgOriW":125,"imgOriH":114})
A．π B．2π C．![](https://wkrtcs.bdimg.com/rtcs/image?w=33&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"33","h":"35","dataType":"png","c":"word/media/image8.png","imgOriW":33,"imgOriH":35})
D．π
6．若正比例函数y=（1﹣2m）x的图象经过点A（x1，y1）和点B（x2，y2），当x1＜x2时，y1＞y2，则m的取值范围是（ ）
A．m＜0 B．m＞0 C．m＜![](https://wkrtcs.bdimg.com/rtcs/image?w=13&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"13","h":"35","dataType":"png","c":"word/media/image10.png","imgOriW":13,"imgOriH":35})
D．m＞
7．如图，在平行四边形ABCD中，点E在边DC上，DE：EC=3：1，连接AE交BD于点F，则△DEF的面积与△BAF的面积之比为（ ）
![](https://wkrtcs.bdimg.com/rtcs/image?w=124&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"124","h":"98","dataType":"png","c":"word/media/image11.png","imgOriW":124,"imgOriH":98})
A．3：4 B．9：16 C．9：1 D．3：1
8．已知点P（a+1，﹣![](https://wkrtcs.bdimg.com/rtcs/image?w=13&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"13","h":"35","dataType":"png","c":"word/media/image12.png","imgOriW":13,"imgOriH":35})
+1）关于原点的对称点在第四象限，则a的取值范围在数轴上表示正确的是（ ）
A．![](https://wkrtcs.bdimg.com/rtcs/image?w=127&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"127","h":"29","dataType":"png","c":"word/media/image13.png","imgOriW":127,"imgOriH":29})
B． C． D．
9．如图，在Rt△ABC中，∠BAC=90°，D、E分别是AB、BC的中点，F在CA延长线上，∠FDA=∠B，AC=6，AB=8，则四边形AEDF的周长为（ ）
![](https://wkrtcs.bdimg.com/rtcs/image?w=126&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"126","h":"117","dataType":"png","c":"word/media/image17.png","imgOriW":126,"imgOriH":117})
A．16 B．20 C．18 D．22
10．在平面直角坐标系中，二次函数图象交x轴于（﹣5，0）、（1，0）两点，将此二次函数图象向右平移m个单位，再向下平移n个单位后，发现新的二次函数图象与x轴交于（﹣1，0）、（3，0）两点，则m的值为（ ）
A．3 B．2 C．1 D．0
二、填空题
11．在四个实数![](https://wkrtcs.bdimg.com/rtcs/image?w=13&md5sum=171a2135306f3988f5f1e9bbc4004a78&sign=c9d59dd4ca&rtcs_flag=1&rtcs_ver=3.1&l=webapp&bucketNum=88&ipr={"t":"img","w":"13","h":"35","dataType":"png","c":"word/media/image18.png","imgOriW":13,"imgOriH":35})
，0，﹣1，中，最大的是 ．
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