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时间:2019-01-16
《八级上册数学期末试题及答案较难》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、2015年八年级(上)期末测试数学试卷(阅读卷)温馨提示:1.本试卷分阅读卷(共1~5页)和答题卷(共6~9页)满分:100分;时间:90分钟。2.请同学们务必将答题卷密封线内的项目填写清楚并将试题答案填写在答题卷相应位置。3.所有阅读卷上的答案无效,考试结束立即停笔,只上交答题卷。阅读卷保留便于老师评讲。八年级是初中阶段一个承上启下的关键时期,而我们这学期又已悄悄的逝去。在这学期里你有什么收获呢?同学们,让我们握笔凝思,沉着应答。和老师们一起来盘点近期的收获吧!一.选择题。(每题中均只有一个最佳选项,选出最佳选项
2、。本大题共12小题、每小题3分,共36分。)1.在任意△ABC与△DEF中AB=DE,若需添加两个条件使这两三角形全等。则有多少种不同的添法········································································()x/分y/千米O1234567201030405060A.6B.9C.18D.28A.1B.2.C.3D.42.下列图形中为轴对称图形的是···············································
3、·()3.点A(x,y)关于x轴对称的点为(z,x+3),关于Y轴对称的点为(z-2,y)。则点A的坐标为···········································································()A.(1,4)B.(—1,4)C.(—1,—4)D.(1,—4)4.如下图,在△ABC中∠BAC=90°且点D为BC的中点AD⊥BC,若AB=5√2,AD=5.则△ABC的周长为·········································
4、··························()A.10+10√2B.10+5√2C.20D.20+√25.能使分式的值为零的所有的值是································()八年级数学第12页 (共8页)A.B.C.或D.或6.果把分式中的x和y都扩大2倍,即分式的值····························()A.扩大4倍;B.扩大2倍;C、不变;D.缩小2倍7.一个多边形的每个外角都相等,如果它的内角与外角的度数之比为13∶2,求 这个多边形的边数······
5、··································································()A.14B.15C.16D.17x/分y/千米O1234567201030405060x/分y/千米O1234567201030405060x/分y/千米O12345672010304050608.张老师和李老师同时从学校出发,步行15千米去县城购买书籍,张老师比李老师每小时多走1千米,结果比李老师早到半小时,两位老师每小时各走多少千米?设李老师每小时走x千米,依题意,得到的方程是
6、··················································()A.B.C.D.9.下列选项中为真命题的是···················································()A.长方形菱形三角形都是轴对称图形B.两三角形中,只要有三元素对应相等则这两三角形全等C.到角两边距离相等的点在这个角的角平分线上D.在一次函数y=2x+3中,y随x的增大而增大;所以任何一次函数y都随x的增大而增大10.在全民健身环城越野赛中,甲乙两选手的行程y(千
7、米)随时间t(时)变化的图象(全程)如图所示.有下列说法:①起跑后1小时内,甲在乙的前面;②第1小时甲跑了10千米,乙跑了8千米;③乙的行程y与时间t的解析式为y=10t;④第1.5小时,甲跑了12千米.其中正确的说法有·····································································()A.1B.2x/分y/千米O1234567201030405060C.3D.4x/分y/千米O123456720103040506011.如图,在△ABC中,
8、∠ABC=45°,AC=8,F是高AD和BE的交点。若三角形ABF的面积为16,则AE的长为····························································()八年级数学第12页 (共8页)A.2B.4C.6D.8x/分y/千米O123456720103040506012.如图,已知△ABC和△DCE均
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