最新广东省深圳市宝安实验中学九年级中考数学模拟优秀名师资料.doc

广东省深圳市宝安实验中学九年级中考数学模拟中考试题8 1. ,6的绝对值是( ) 11(A) 6 (B) ,6 (C) (D) ,662. 据深圳特区报2月28日报告，2011年底我市机动车保有量为200.8万辆，汽车保有量排名全国第二将数据200.8万保留三个有效数字，用科学记数法表示为( ) 6267(A) 2.008×10 (B) 2.01×10 (C) 2.01×10 (D) 0.201×10 3. 下列食品商标中，即是轴对称又是中心对称图形的是( ) (A) (B) (C) (D) 4. 下列运算正确的是( ) 32632522222(A) a?a,a (B) (a),a (C) (a，b)(a,b),a,b (D) (a，b),a，b 5. 根据深圳空气质量时报显示，2013年5月10日15时我市部分环境监测站“PM2.5的24小时滑动平均分指数“如下表所示: 监测站名称 盐田福田 南山 宝安 罗湖 龙岗 PM2.5 55 60 73 53 55 40 24小时滑动平均分指数 对于这组数据，下列说法中错误的是( ) (A) 平均数是56 (B) 众数是55 (C) 中位数是55 (D) 方差是7 6. 如图，在?ABC中，D、E分别是边AB、AC的中点，?B,50?，现将?ADE沿DE折叠，点A落在三角形所在的平面内的点A，则?BDA的度数为( ) 11(A) 50? (B) 60? (C) 70? (D) 80? 7. 小明在白纸上任意画一个锐角，他画的角在30?到60?之间的概率是( ) 1112(A) (B) (C) (D) 36238. 下列叙述正确的个数是( ) 222?相等的角是对顶角;?长度相等的弧是等弧;?若a,b，则a,b是确定事件;?一元二次方程x―x―1,0有两个不相等的实数根; (A) 1个 (B) 2个 (C) 3个 (D) 4个 9. 如图是一个圆形人工湖的示意图，弦AB是湖上的一座桥，已知桥AB长100m，测得圆周角?ACB,60?，则这个人工湖的直径AD为( ) Colorimetric tube 1 0 mL glass. 4, the analysis step preparation of the sample solution: precision weighing approximately 0.01 g~1.0 g sample (accurate to 0.0001 g) in 1 ... V2--determination of sampling volume. Unit ml (mI. ); M--quality of the sample, expressed in grams (g); The atomic weight of 55.84--Fe; 2--conversion factors. 6, precision under repeatability conditions to obtain the absolute value of the difference of two independent test results shall not exceed the arithmetical average of the 10%. Food additives sweet agent [saccharin sodium, and sweet pigment, and acetyl sulfa acid potassium (Ann game honey], and coloring agent of test according to focus introduced anti-oxidant of detection (BHA, and BHT, and PG, and TBHQ),] GB2760 GB/T5009.30, and GB/T5009.32, and GB/T5009.35, and food in the often using of anti-oxidant main has BHA, and BHT, and PG, and TBHQ tert-butyl hydroxy fennel ether (BHA) 2,6-II tert-butyl on cresol (BHT ) Of tert-butyl hydroxy anisole (BHA) 2,6-di-tert-butyl-p-cresol (BHT) testing in accordance with GB/T5009.30 vapor phase chromatography and thin-layer chromatography, this section focuses on Colorimetry. Principle 1, obtained by steam distillation of the sample. separate the BHT, methanol absorption, o-anisidine and sodium nitrite solution orange-red, extracted with chloroform, compared with standard sizing. 2, anhydrous calcium chloride reagent. Methanol. Chloroform. Methanol (50%). Sodium nitrite solution (3 g/l): keep in dark place. O-anisidine solution; weighing 125 mg o-anisidine in 50mL the second Brown volumetric flask, add 25mL methanol and shake to dissolve, and 50mg activated carbon, shake10032003(A) (B) (C) (D) 150m 1003mmm33210. 已知二次函数y,ax，bx，c(a?0)的图象如图所示，现有下列结论:?abc>0;?b2,4ac<0;?4a,2b，c<0;?b,,2a;其中结论正确的是( ) (A) ?? (B) ?? (C) ?? (D) ?? 11. 观察下列图形及图形所对应的算式，根据你发现的规律计算:1，8，16，24，……，8n(n是正整数)的结果是( ) 2222 (A) (2n，1) (B) (2n,1) (C) (n，2) (D) n(第9题) (第10题) (第11题) 12. 如图，?ABC和?ADE都是等腰直角三角形，?BAC,?DAE,90?，四边形ACDE是平行四边形，连结CE?CE,BD;??ADC是等腰Rt?;??ADB交AD于F，连结BD交CE于点G，连结BE;下列结论中:,?AEB;?CD?AE,EF?CG;一定正确的结论有( ) (A) 1个 (B) 2个 (C) 3个 (D) 4个 2213. 因式分解:,3x，6xy,3y,______________________ m+n3m-n14. 如果单项式2xy与单项式xy是同类项，则mn,________ ky,(k,0)15. 如图，已知函数y,,x，1的图象与x轴、y轴分别交于C、B两点，与双曲线交于A、D两点，x若BC,2AB，则k的值为____________ 12y,x16. 如图，将抛物线平移得到抛物线m，抛物线m经过点A(,6，0)和原点O(0，0)，它的顶点为P，对312y,x称轴与抛物线交于点Q，则图中阴影部分的面积为________ 3(第12题) (第15题) (第16题) Colorimetric tube 1 0 mL glass. 4, the analysis step preparation of the sample solution: precision weighing approximately 0.01 g~1.0 g sample (accurate to 0.0001 g) in 1 ... V2--determination of sampling volume. Unit ml (mI. ); M--quality of the sample, expressed in grams (g); The atomic weight of 55.84--Fe; 2--conversion factors. 6, precision under repeatability conditions to obtain the absolute value of the difference of two independent test results shall not exceed the arithmetical average of the 10%. Food additives sweet agent [saccharin sodium, and sweet pigment, and acetyl sulfa acid potassium (Ann game honey], and coloring agent of test according to focus introduced anti-oxidant of detection (BHA, and BHT, and PG, and TBHQ),] GB2760 GB/T5009.30, and GB/T5009.32, and GB/T5009.35, and food in the often using of anti-oxidant main has BHA, and BHT, and PG, and TBHQ tert-butyl hydroxy fennel ether (BHA) 2,6-II tert-butyl on cresol (BHT ) Of tert-butyl hydroxy anisole (BHA) 2,6-di-tert-butyl-p-cresol (BHT) testing in accordance with GB/T5009.30 vapor phase chromatography and thin-layer chromatography, this section focuses on Colorimetry. Principle 1, obtained by steam distillation of the sample. separate the BHT, methanol absorption, o-anisidine and sodium nitrite solution orange-red, extracted with chloroform, compared with standard sizing. 2, anhydrous calcium chloride reagent. Methanol. Chloroform. Methanol (50%). Sodium nitrite solution (3 g/l): keep in dark place. O-anisidine solution; weighing 125 mg o-anisidine in 50mL the second Brown volumetric flask, add 25mL methanol and shake to dissolve, and 50mg acti。