初中毕业会考数学试卷(新课程)-初中三年级数学试题练习、期中期末试卷-初中数学试卷
初中毕业会考数学试卷(新课程)-初中三年级数学试题练习、期中期末试卷、测验题、复习资
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初中毕业会考数学试卷(新课程)
考生注意:本试卷共十道大题,其中正卷八道题,满分100分;另附加题二道题,共20分,时量120分钟.
一、填空题(本题共12个小题,每小题2分,共24分)
1.函数中自变量的取值范围是.
2.如右图,已知,,则,
.
3.永州市现共有11个县(区),总地域面积约亩,用科学记数法(保留三个有效数字)表示这一数据为亩.
4.工人师傅在安装木制门框时,为防止变形常常像图中所示,钉上两条斜拉的木条,这样做的原理是根据三角形的性.
5.不等式组的解集是.
6.的平行四边形是菱形(填一个合适的条件).
7.如图所示是体的展开图.
8.在建设社会主义新农村活动中,张村、李村为合理利用资源,优化环境,兴建了一批沼气池,设张村已建沼气池个,李村所建沼气池的数目是张村的2倍少1个,则李村所建沼气池数目为个(用代数式表示).
9.如图为九嶷山风景区的几个景点的平面图,以舜帝陵为坐标原点,建立平面直角坐标系,则玉王宫岩所在位置的坐标为.
10.如图所示,在等腰三角形中,,,那么底边上的高cm.
11.在10000株樟树苗中,任意测量20株的苗高,这个问题中,样本容量是.
12.如右图所示为农村一古老的捣碎器,已知支撑柱的高为0.3米,踏板长为1.6米,支撑点到踏脚的距离为0.6米,现在踏脚着地,则捣头点上升了米.
二、选择题:(每题只有一个正确选项,请将正确选项的代号填入下表,本题共8个小题,每小题3分,共24分)
13.
在中,无理数的个数是()
A.1B.2C.3D.4
14.在下列二次根式中,与是同类二次根式的是()
A.B.C.D.
15.在下列图形中,既是中心对称又是轴对称的图形是()
(纸风车)(中国国蝶)(美丽的地板)(稻草人)
A.
B.
C.
D.
16.已知,下列四个不等式中,不正确的是()
A.B.C.D.
17.小慧今天到学校参加初中毕业会考,从家里出发走10分钟到离家500米的地方吃早餐,
吃早餐用了20分钟;再用10分钟赶到离家1000米的学校参加考试.下列图象中,能反映这一过程的是()
18.在2,3,4,5,五个数据中,平均数是4,那么这组数据的方差是()
A.2B.10C.D.
19.某市电视台在今年5月举办的“开心就唱”歌手大赛活动中,号召观众发短信为参赛者投支持票,投票短信每1万条为1组,每组抽出1个一等奖,3个二等奖,6个三等奖.张艺同学发了1条短信,她的获奖概率是()
A.B.C.D.
20.如图,在半径为的圆内作一个内接正方形,然后作这个正方形的内切圆,又在这个内切圆中作内接正方形,依此作到第个内切圆,它的半径是()
A.B.C.D.
三、(本题含两个小题,每小题6分,共12分)
21.计算:.
22.化简求值:
,其中,.
四、(本题满分6分)
23.请画出已知图形(如图所示)关于直线的对称图形.(保留作图痕迹,不写画法)
五、(本题满分8分)
24.已知正比例函数经过点.(如图所示)
(1)求这个正比例函数的解析式.
(2)该直线向上平移3个单位,求平移后所得直线的解析式.
六、(本题满分8分)
25.2006年“五一”长假期间,永州市政府在阳明山风景区举办了“阳明山‘和’文化节”,参加人数多达26000人,7天内参加人员按地域来源分类统计的结果是:
一.永州市内人数占50%;
二.湖南省内,永州市外的来客占25%;
三.中国内地,湖南省外的来客占12%;
四.港、澳、台三地同胞占8%;
五.国外游客占5%.
扇形统计图如右图所示:
(一)把各地域代号与扇形区域代号的对应关系,
用线段连接起来:
一
二三四五
1
2
3
4
5
(二)求参加“阳明山‘和’文化节”活动的港、澳、台同胞的人数.
七、(本题满分8分)
26.李大伯承包了一片荒山,在山上种植了一部分优质油桃,今年已进入第三年收获期.今年收获油桃6912千克,已知李大伯第一年收获的油桃重量为4800千克.试求去年和今年两年油桃产量的年平均增长率,照此增长率,预计明年油桃的产量为多少千克?
八、(本题满分10分)
27.如图的内接中,外角的角平分线与相交于点,,垂足为,,垂足为.问:(1)与是否相等?为什么?
(2)图中有哪几组相等的线段?
(3)当满足什么条件时,,为什么?
(附加题)九、(本题满分10分)
28.已知抛物线经过点.
(1)求抛物线的解析式.
(2)设抛物线顶点为,与轴交点为.求的值.
(3)设抛物线与轴的另一个交点为,求四边形的面积.
(附加题)十、(本题满分10分)
29.如图,以为圆心的两个同心圆中,大圆的直径交小圆于两点,大圆的弦切小圆于点,过点作直线,垂足为,交大圆于两点.
(1)试判断线段与的大小关系,并说明理由.
(2)求证:.
(3)若是方程的两根(),求图中阴影部分图形的周长.
初中毕业会考试卷参考答案及评分标准
数学(新课标)
一、填空题(12个小题,每题2分,共24分)1.2.3.4.稳定
5.或6.对角线互相垂直或(一组)邻边相等
7.六棱锥8.9.10.611.2012.0.8
二、选择题(8个小题,每题3分,共24分)
题号
13
14
15
16
17
18
19
20
答案
B
C
C
B
D
A
B
A
三、计算(共2题,每题6分,共12分)
21.解:原式=···················································································· 3分.····································································· 6分
22.化简求值:
解:原式··································································· 2分
.······································································································· 3分当时,······················································································· 4分.························································································· 6分
四、作图题(共6分)
23.(画出了轴对称图形6分,无作图痕迹扣2分)
五、(共8分)
24.(1)解:由函数经过点,可得:,解析式为:.······· 4分
(2)解:直线向上平移3个单位后,得到的解析式为:.············· 8分
六、(本题共8分)
25.(1)一二三四五
12345
(2)解:(人)··········································································· 4分
答:参加“和”节的港、澳、台同胞的人数为2080人.················································ 8分七、(本题共8分)
26.解:设油桃今年和去年的年平均增长率为,依题意得:······································· 1分.································································································· 3分
解方程得:或(舍去负根)得.··································· 5分
预计明年的产量为:(千克).············································ 7分
答:年平均增长率为20%,照此增长率,预计明年的产量为8294.4千克.···················· 8分
八、(本题共10分)
27.(1)答:相等.······································································································ 1分因为为的角平分线(已知),
.
,..································································································· 3分
(2).(写出一组得1分)··················· 7分
(3)且时,,······································· 9分
因为为直角,所以为直角,为的角平分线,
,所以.···················································· 10分
附加题九、(本题共10分)
28.(1)解方程组得,.·················································································· 3分
(2)顶点.················································· 6分
(3)在中,令得,,
令得或,.············································································ 8分
四边形(面积单位)···················································· 10分
十、(本题满分10分)
29.(1)相等.············································································································· 1分连结,则,故.····································································· 3分
(2)由,得,······································· 4分
又由,得.····························································· 5分.································································································ 6分(3)解方程得:,,··························································· 7分,,
在中,,
,.
在中,,
,,
弧长,,······· 9分
阴影部分周长.················································ 10分
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