最新黄冈数学中考试题及答案优秀名师资料.doc
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1、2012年黄冈数学中考试题及答案2012黄冈中考数学 一(填空题:(每小题3分,共30分) 1(; 3,_2(2003年5月19日,国家邮政局特别发行“万众一心 抗击非典”邮票,收入全部捐赠给卫生部门,用以支持抗击“非典”斗争,其邮票发行量为12500000枚,用科学记数法表示正确的是 ; 23(分解因式: ; ax,2ax,a,x,24(函数函数中自变量的取值范围是 ; y,xx,15(从甲、乙、丙三个厂家生产的同一种产品中各抽取8件产品,对其中使用寿命跟踪调查(结果如下:(单位:年) 甲:3,4,5,6,8,8,8,10 乙:4,6,6,6,8,9,12,13 丙:3,3,4,7,9,10
2、,11,12 三个厂家在广告中都称该产品的 使用寿命是8年,请根据结果判断厂家在广告中分别运用了平均数、 众数、中位数中的哪一种集中趋势的特征数: 图A 甲 ,乙 ,丙 ; 12y,x,2x6(二次函数,当 时, x2;且y随的增大而减小; 图B xy,0b7(两个长、宽各为米、米的矩形花圃,都修建了形状不同的一条宽为米的小路,问:ac这两条小路的面积是否相等, (填相等或不相等),若相等,面积是 ; 8(五个正整数从小到大排列,若这组数据的中位数是4,唯一众数是5,则这五个正整数的和为 ; 9(已知:如图,CD是?O的直径,AE切?O于点B,DC的延长 20:线交AB于点A,?A =,则?D
3、BE,_; 10(党的十六大提出全面建设小康社会,加快推进社会主义现代化, 力争国民生产总值到2020年比2000年翻两番。在本世纪的头二十年 (2001年,2020年),要实现这一目标,以十年为单位计算,设每 个十年的国民生产总值的增长率都是x,那么x满足的方程为 ; 二(选择题(每小题4分,共24分) 在每个小题给出的四个备选答案中,只有一个是符合题目要求的,请把所选答案前的字母填写在下表中。 11 12 13 14 15 16 11(下列各式中,正确的是 main construction machines configured list of main construction equ
4、ipment number equipment name model units number remark, lifting and transportation equipment 1 car SCC6000 3 2 1 rental car SCC2600 1 rental car QY50C 2 4 car QY25C 4-owned 5-owned truck crane QY12C 3 6 TC6024 tower crane-owned 2-7 TC5513 3 tower cranes-lease 8 upgrade SMZ20 3 owned 9 flatbed traile
5、r 10 truck 25t 50T 2 rental 5-owned 11 tools 1.5T set SY5250GJB3A 2-owned 12 concrete pump truck set 5 lease 13 SY5310THB40R 14 2 rental of concrete pump truck forklift truck 5T 1-owned 25t 2 owned 16 15 electric winch hoists 10T 3 owned 17 manual hoists 10T 40 owned 18 manual hoists 5T 10 owned 19
6、manual Hu Lu 2T 3T 10 owned 20 manual hyacinth 10 owned 21 hydraulic jack 20T 15 owned 22 hydraulic jack 10T 10-owned three-, welding and lathe equipment and pipeline installation machinery 1 C620 3 2 radial drilling machine-owned Z50 4 3-owned semi-automatic cutting machine GZ-100A 15-owned 4 wheel
7、 cutter 400 20 5 plasma cutting machine 25-owned owned 150 100-owned 6 angle grinder 7 angle grinder diameter 100 180 owned 8 internal grinding machine 75 owned 9 electric test pump SY600 4-owned 2U-6/8 10 portable air compressor 2-owned 1/2 4 11 tube Bender 5-owned 12 electric pipe threader 5 out o
8、f . A comprehensive system of education for construction through technology to give the low-down, deeper knowledge of engineering construction personnel, enhance the quality of construction, security, and civil construction. (2) machine check: needed for construction machinery inventory verification
9、, see construction equipment, machinery is intact, a variety of motor are working properly, is safe and reliable. Detection tools are complete and in good condition, discovered the problem in time to replace or repair. (3) all pipes, pipe fittings, valves, welding material must have the materials qu
10、ality certificate, its content and form must ,231,23653826 (B) (C) (D) (A) a,a,aa,a,a,9,,3a,9a,3,12(将一张矩形纸对折再对折(如图),然后沿着图中的虚线剪下,得到?、?两部分,将?展开后得到的平面图形是、 A 矩形 B 三角形 C 梯形 D 菱形 13(某中学人数相等的甲、乙两班学生参加了同一次数学测验,班平均分和方差分别为 22,82分,,82分,,245,,190,那么成绩较为整齐的是 xxSS甲乙乙甲(A) 甲班 (B) 乙班 (C) 两班一样整齐 (D)无法确定 14(某商场的营业额199
11、9年比1998年上升10,,2000年比1999年上升10,,而2001年和2002年连续两年平均每年比上一年降低10,,那么2002年的营业额比1998年的营业额 (A) 降低了2, (B) 没有变化 (C) 上升了2, (D) 降低了1.99, 15(下列各图中,每个正方形网格都是由四个边长为,的小正方形组成,其中阴影部分面积5为的是 2(D) (A) (C) (B) 16(某村办工厂今年前5个月生产某种产品的总量c(件)关于时间t(月)的函数图象如图所示,则该厂对这种产品来说 c(件)(A) 1月至3月每月生产总量逐月增加,4、5两月每 月生产总量逐月减少 (B) 1月至3月每月生产总量
12、逐月增加,4、5两月每 月生产总量与3月份持平 (C)1月至3月每月生产总量逐月增加,4、5两月均停止生产 Ot(月)31254(D)1月至3月每月生产总量不变, 4、5两均停止生产 三(解答题:(96分) 611,1,3(1,3),,()17(7分)计算 232,3main construction machines configured list of main construction equipment number equipment name model units number remark, lifting and transportation equipment 1 car
13、SCC6000 3 2 1 rental car SCC2600 1 rental car QY50C 2 4 car QY25C 4-owned 5-owned truck crane QY12C 3 6 TC6024 tower crane-owned 2-7 TC5513 3 tower cranes-lease 8 upgrade SMZ20 3 owned 9 flatbed trailer 10 truck 25t 50T 2 rental 5-owned 11 tools 1.5T set SY5250GJB3A 2-owned 12 concrete pump truck se
14、t 5 lease 13 SY5310THB40R 14 2 rental of concrete pump truck forklift truck 5T 1-owned 25t 2 owned 16 15 electric winch hoists 10T 3 owned 17 manual hoists 10T 40 owned 18 manual hoists 5T 10 owned 19 manual Hu Lu 2T 3T 10 owned 20 manual hyacinth 10 owned 21 hydraulic jack 20T 15 owned 22 hydraulic
15、 jack 10T 10-owned three-, welding and lathe equipment and pipeline installation machinery 1 C620 3 2 radial drilling machine-owned Z50 4 3-owned semi-automatic cutting machine GZ-100A 15-owned 4 wheel cutter 400 20 5 plasma cutting machine 25-owned owned 150 100-owned 6 angle grinder 7 angle grinde
16、r diameter 100 180 owned 8 internal grinding machine 75 owned 9 electric test pump SY600 4-owned 2U-6/8 10 portable air compressor 2-owned 1/2 4 11 tube Bender 5-owned 12 electric pipe threader 5 out of . A comprehensive system of education for construction through technology to give the low-down, d
17、eeper knowledge of engineering construction personnel, enhance the quality of construction, security, and civil construction. (2) machine check: needed for construction machinery inventory verification, see construction equipment, machinery is intact, a variety of motor are working properly, is safe
18、 and reliable. Detection tools are complete and in good condition, discovered the problem in time to replace or repair. (3) all pipes, pipe fittings, valves, welding material must have the materials quality certificate, its content and form must 22x,1x,2x18(10分)化简求值:; ,,x,其中x,2,12x,2x,2x,1. 19(8分)某电
19、视机场2000年生产一种彩色电视机,每台成本3000元,由于该厂不断进行技术改造,连续两年降低成本,到2002年这种彩色电视机成本仅1920元,问平均每年降低成本百分之几, main construction machines configured list of main construction equipment number equipment name model units number remark, lifting and transportation equipment 1 car SCC6000 3 2 1 rental car SCC2600 1 rental car Q
20、Y50C 2 4 car QY25C 4-owned 5-owned truck crane QY12C 3 6 TC6024 tower crane-owned 2-7 TC5513 3 tower cranes-lease 8 upgrade SMZ20 3 owned 9 flatbed trailer 10 truck 25t 50T 2 rental 5-owned 11 tools 1.5T set SY5250GJB3A 2-owned 12 concrete pump truck set 5 lease 13 SY5310THB40R 14 2 rental of concre
21、te pump truck forklift truck 5T 1-owned 25t 2 owned 16 15 electric winch hoists 10T 3 owned 17 manual hoists 10T 40 owned 18 manual hoists 5T 10 owned 19 manual Hu Lu 2T 3T 10 owned 20 manual hyacinth 10 owned 21 hydraulic jack 20T 15 owned 22 hydraulic jack 10T 10-owned three-, welding and lathe eq
22、uipment and pipeline installation machinery 1 C620 3 2 radial drilling machine-owned Z50 4 3-owned semi-automatic cutting machine GZ-100A 15-owned 4 wheel cutter 400 20 5 plasma cutting machine 25-owned owned 150 100-owned 6 angle grinder 7 angle grinder diameter 100 180 owned 8 internal grinding ma
23、chine 75 owned 9 electric test pump SY600 4-owned 2U-6/8 10 portable air compressor 2-owned 1/2 4 11 tube Bender 5-owned 12 electric pipe threader 5 out of . A comprehensive system of education for construction through technology to give the low-down, deeper knowledge of engineering construction per
24、sonnel, enhance the quality of construction, security, and civil construction. (2) machine check: needed for construction machinery inventory verification, see construction equipment, machinery is intact, a variety of motor are working properly, is safe and reliable. Detection tools are complete and
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