《最新浙江省杭州市萧山区瓜沥片届九年级第一次中考模拟考试数学优秀名师资料.doc》由会员分享，可在线阅读，更多相关《最新浙江省杭州市萧山区瓜沥片届九年级第一次中考模拟考试数学优秀名师资料.doc（22页珍藏版）》请在三一文库上搜索。
1、浙江省杭州市萧山区瓜沥片2012届九年级第一次中考模拟考试数学杭州萧山瓜沥片2012届第一次中考模拟 数学问卷 一、选择题(本题共10小题，每小题3分，共30分) 1(,3的相反数是( ) A( B( C(3 D(,3 22(已知地球上海洋面积约为316 000 000km，316 000 000这个数用科学记数法可表示为( ) 8769 A(3.1610 B(3.1610 C(3.1610 D(3.1610 3(如图所示的物体有两个紧靠在一起的圆柱体组成，它的主视图是( ) (364(若m?2,2，则m等于( ) A(2 B(4 C(6 D(8 5(有一组数据:3，4，5，6，6，则下列四个
2、结论中正确的是( ) A(这组数据的平均数、众数、中位数分别是4.8，6，6 B(这组数据的平均数、众数、中位数分别是5，5，5 C(这组数据的平均数、众数、中位数分别是4.8，6，5来源:Z#xx#k.Com D(这组数据的平均数、众数、中位数分别是5，6，6 5y,6(若点(1,)23,y、(，y)、(，y)都在反比例函数的图象上，则( ) 123xA(yyy, B(yyy, C(yyy, D(yyy, 1232131231327(在Rt?ABC中，?C=90?，AB=5，BC=3，以AC所在的直线为轴旋转一周，所得圆锥的表面积为( )来源:学*科*网Z*X*X*K 12,15,24,30
3、, A( B( C( D( 8. 已知:m, n是两个连续自然数(m1 12、 13、 4 a(a,3)56,3，33:2,，414、 15、 16、; 3三、解答题(本题共7小题，共66分，各小题都必须写出解答过程) ,2017、(6分)(1)计算:( (,2)，9,(sin45:,1)19，3,1, = (3分) 442(2)解: 2x,4x,1,0 13222(1)x,x,x, (1分)来源:学科网ZXXK 226611 ? (各1分) x,，x,122218. (8分) 解:(1)由表格或树状图可得，所有等可能的结果有12种，其中|m+n|,1的情况有5种，(3分) 5P,所以|m+n
4、|,1的概率为;(2分) 121(2)点(m，n)在函数y=-1/x上的概率为(3分) 4?EBC=60?， 19.(8分) 解:由?ABC=120?可得?EBC=60?，在Rt?BCE中，CE=51，因此tan60?=错误未找到引用源。，BE=错误未找到引用源。， (3分) 在矩形AECF中，由?BAD=45?，得?ADF=?DAF=45?， 因此DF=AF=51， (2分) ?FC=AE=34+30=64， ?CD=FC,FD?64,51=13， (2分) 因此BE的长度约为30cm，CD的长度约为13cm(1分) the direct punishment 0.5-10,000 yuan
5、, responsible for the direct responsibility for the accident and the responsibility of leadership, such as concerning administrative sanctions should be dealt with by the personnel Department of the company. (3) personal injury accident occurs, the direct punishment 500-1000, who is directly respons
6、ible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the accident, reported without undue delay or false, to inform the administrative leadership of the criticism, resulting in serious consequences, the pursuit of leadership, along
7、 with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 ste
8、el fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and testing results for grade 3 GB50236-2002 industrial pipe welding engineering code for construction and acceptance of field equipment 4 HGJ222-92 t
9、echnical specification for welding of aluminium and its alloys 5 low temperature steel welding procedure 6 SH3525-2004 petrochemical JB/ T4708-2000 of welding procedure qualification for steel pressure vessels 7 JB/4709-2000 8 JB4730-2005 pressure vessel welding procedures of steel pressure vessel N
10、DT 9 JB/T4744-2000 steel pressure vessel products mechanical properties test of welded plate II, mechanical equipment installation engineering 1 GB150-98 2 GB50128-2005 vertical cylindrical steel pressure vessel steel welded tank code for construction and acceptance of 3 JB/ T4735-1997 steel welded
11、20.(10分)解:(1)?直线y,kx，b过A(0，,2)，B(1，0)两点 1,2b,?错误未找到引用源。， ,，,0kb1,2b,?错误未找到引用源。 ,k,21,?已知函数的表达式为y,2x,2(3分)来源:学+科+网 ?设M(m，n)作MD?x轴于点D ?S,2， ?OBM1?，OB,MD,2 21?错误未找到引用源。n,2 2?n,4 (4分) ?将M(m，4)代入y,2x,2得4,2m,2， ?m,3 ?M(3，4)在双曲线错误未找到引用源。上， k2,4 ?错误未找到引用源。，3?k,12 212y,?反比例函数的表达式为错误未找到引用源。 (5分) x(2)存在。 (6分)
12、过点M(3，4)作MP?AM交x轴于点P， ?MD?BP， ?PMD,?MBD,?ABO OA2,?tan?PMD,tan?MBD,tan?ABO,2 (8分) OB1PD,2?在Rt?PDM中，错误未找到引用源。， MD?PD,2MD,8， ?OP,OD，PD,11 ?在x轴上存在点P，使PM?AM，此时点P的坐标为(11，0) (10分) 21.(10分) 解答:(1)证明:连接EC， ?AD?BE于H，?1,?2， ?3,?4 ?4,?5,?3， 来源:Zxxk.Com 又?E为弧CF中点， ?6,?7， ?BC是直径， ?E,90?， ?5，?6,90?， 又?AHM,?E,90?，
13、?AD?CE， ?2,?6,?1， ?3，?7,90?， 又?BC是直径， ?AB是半圆O的切线; (5分) the direct punishment 0.5-10,000 yuan, responsible for the direct responsibility for the accident and the responsibility of leadership, such as concerning administrative sanctions should be dealt with by the personnel Department of the company.
14、(3) personal injury accident occurs, the direct punishment 500-1000, who is directly responsible for the accident responsibility, give notice of criticism and 50-100 economic sanctions against them. (4) to conceal the accident, reported without undue delay or false, to inform the administrative lead
15、ership of the criticism, resulting in serious consequences, the pursuit of leadership, along with 500-1000 punishment. (5) significant near miss should be attempted as the case of responsible for the accident and construction team injuries accident penalty provisions, mutatis mutandis. Eight, should perform in the construction standards and specifications, serial number a 1 GB3323-2005 steel fusion welded butt joints, welding engineering-Ray lighting and quality rating of 2 GB11345-89 steel welds manual methods of ultrasonic inspection and