人教版初一下册数学期中练习题.doc_第1页
人教版初一下册数学期中练习题.doc_第2页
人教版初一下册数学期中练习题.doc_第3页
人教版初一下册数学期中练习题.doc_第4页
人教版初一下册数学期中练习题.doc_第5页
已阅读5页,还剩1页未读 继续免费阅读

下载本文档

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

(1) 已知三角形三边长分别为3、(12)、8,则的取值范围是_(2) 已知点M(1-a,a+2)在第二象限,则a的取值范围是_。(3) 某书城开展学生优惠售书活动,凡一次性购书不超过200元的一律九折优惠,超过200元的,其中200元按九折算,超过200元的部分按八折算。某学生第一次去购书付款72元,第二次又去购书享受了八折优惠,他查看了所买书的定价,发现两次共节省了34元钱。则该学生第二次购书实际付款 元。(4)原点O的坐标是 ,x轴上的点的坐标的特点是 ,y轴上的点的坐标的特点是 ;点M(a,0)在 轴上。(5) 点P到x轴的距离是2,到y轴的距离是3,则P点的坐标是 。(6) 线段CD是由线段AB平移得到的。点A(1,4)的对应点为C(4,7),则点B(4,1)的对应点D的坐标为_。(7) 在平面直角坐标系内,把点P(5,2)先向左平移2个单位长度,再向上平移4个单位长度后得到的点的坐标是 。若点B(a,b)在第三象限,则点C(a+1,3b5) 在第_象限。(8) 若点B(a,b)在第三象限,则点C(a+1,3b5) 在第_象限。(9)如果点M(x+3,2x4)在第四象限内,那么x的取值范围是_。(10)已知点P在第二象限,且横坐标与纵坐标的和为1,试写出一个符合条件的点P 。点K在第三象限,且横坐标与纵坐标的积为8,写出两个符合条件的点 。(11)已知,则点(,)在 。(12)一个长方形在平面直角坐标系中三个顶点的坐标为( 1, 1)、( 1,2)、(3, 1),则第四个顶点的坐标为( )A(2,2) B(3,2) C(3,3) D(2,3)(13)已知三角形的三个顶点坐标分别是(-1,4),(1,1),(-4,-1),现将这三个点先向右平移2个单位长度,再向上平移3个单位长度,则平移后三个顶点的坐标是( )A、(-2,2),(3,4),(1,7); B、(-2,2),(4,3),(1,7);C、(2,2),(3,4),(1,7); D、(2,-2),(3,3),(1,7)(14)在平面直角坐标系中,将三角形各点的纵坐标都减去3,横坐标保持不变,所得图形与原图形相比( ) A.向右平移了3个单位 B.向左平移了3个单位C.向上平移了3个单位 D.向下平移了3个单位(15)锐角三角形的三条高都在 ,钝角三角形有 条高在三角形外,直角三角形有两条高恰是它的 。(16)若等腰三角形的两边长分别为3cm和8cm,则它的周长是 。(17)在ABC中,若A=C=B,则A= ,B= ,这个三角形是 (18)在ABC中,如果BAC=50,B=_。(19)一个多边形的内角和是1980,则它的边数是_,共有条对角线_,它的外角和是_。(20)如图,已知直线ABCD,当点E直线AB与CD之间时,有BEDABECDABECDE成立;而当点E在直线AB与CD之外时,下列关系式成立的是()ABEDABECDE或BEDABECDEBBEDABECDECBEDCDEABE或BEDABECDEDBEDCDEABE(21)已知一多边形的每一个内角都等于150,则这个多边形是正( )(A) 十二边形 (B) 十边形 (C) 八边形 (D) 六边形(22)中华人民共和国国旗上的五角星,它的五个锐角的度数和是( )A、500 B、100 0 C、180 0 D、 200 0(23)在ABC中,三个内角满足BA=CB,则B等于( )A、70 B、60 C、90 D、120(24)在锐角三角形中,最大内角的取值范围是( )A、090 B、60180 C、6090 D、6090(25)在五边形ABCDE中,A=D,C+E=2B,A-B=45,求A、B的度数(26)在ABC中,已知ABC=66,ACB=54,BE是AC上的高,CF是AB上的高,H是BE和CF的交点,求ABE、ACF和BHC的度数.(27)下列长度的三条线段可以组成三角形的是( )(A) 3、4、2 (B)12、5、6 (C)1、5、9 (D)5、2、7(27)在平面直角坐标系中,点A(-3,0),B(5,0),C(0,4)所组成的三角形ABC的面积是( )A、32; B、4; C、16; D、8(28)在ABC中,A=(BC)、BC=20,求A、B、C的度数。(29)如图,在ABC中,ABC与ACB的平分线交于点I,根据下列条件求BIC的度数.(1)若ABC=50,ACB=80,则BIC=_;(2)若ABC+ACB=116,则BIC=_;(3)若A=56,则BIC=_;(4)若BIC=100,则A=_;(5)通过以上计算,探索出您所发现规律:A与BIC之间的数量关系是_。图11(30)已知,如图9,点B、F、C、E在同一直线上,AC、DF相交于点G,ABBE,垂足为B,DEBE,垂足为E,且ABDE,BFCE那么:A与 D有怎样的关系?你能说出理由吗? ABFCEGD图9(31)已知:如图11,是和的平分线,那么吗?请说明理由(32)一个三角形的两边长分别为3和7,且第三边长为整数,这样的三角形的周长最小值是( ) A14 B15 C16 D17图3(33)图3是一个等边三角形木框,甲虫在边框上爬行(,端点除外),设甲虫到另外两边的距离之和为,等边三角形的高为,则与的大小关系是()无法确定AEBCD图7(34)如图7,已知ABC中,BD是ABC的角平分线,DEBC,交AB于E,A60,C=80,求:BDE各内角的度数(35)下列各点中,在第二象限的点是 ( )A(2,3) B(2,3) C(2,3) D(2, 3)(36)若点P(x ,y)的坐标满足xy=0(xy),则点P在 ( )A原点上 Bx轴上 Cy轴上 Dx轴上或y轴上(37)将某图形的横坐标都减去2,纵坐标保持不变,则该图形 ( )A向右平移2个单位 B向左平移2 个单位 C向上平移2 个单位 D向下平移2 个单位(38)一只蚂蚁由(0,0)先向上爬4个单位长度,再向右爬3个单位长度,再向下爬2个单位长度后,它所在位置的坐标是_(Liu Hua is Li Weis pen pal, and now he is in a high school in Sydney. This is a letter from Liu Hua 1 Li Wei.) Dear Li Wei, Thank you for your postcard. I am 2 to you in the reading room. Now I have many new friends here. Jim is one of them. He is 13 years old, his mother is an American, 3 his father is from Canada. He often 4 me to go to his home for dinner. His family like China very much. At the school, we have many good teachers. One of them is from the USA. We 5 her Miss Green. She teaches 6 English. Our French teacher is Mr Brown. He comes 7 Paris. He loves us very much, and we all love him. Our Chinese teacher is Mr Scott, Jims father. After school, he often talks to me 8 Chinese. 9 is your English now? I want to know something 10 you very much. Please write to me soon.Yours,Liu Hua1. A. with B. to C. fromD. for 2. A. asking B. telling C. telephoning D. writing 3. A. but B. so C. becauseD. then 4. A. gives B. gets C. asks D. lets5. A. say B. ask C. call D. teach 6. A. us B. we C. our D. ours 7. A. in B. from C. at D. to 8. A. with B. in C. for D. about 9. A. What B. When C. Why D. How 10. A. about B. for C. with D. of (A)My name is Jack Wilson. I am from Toronto, Canada. Its far from Shijiazhuang. I am 13 years old. I am a schoolboy. I know China is a great country. I want to learn Chinese. I want to go on a trip to China. There are twenty-four students in my class. My classmates are from six countries. They are learning English. My parents are from France. They speak French. I speak English and French. There are five Chinese students here in my class. We are good friends. 1. Jack is from_. A. Toronto B. Shijiazhuang C. China D. France 2. Jack wants to_. A. go to France B. learn French C. go to China D. learn English 3. Jacks class has_ students. A. six B. five C. fourteen D. twenty-four 4. Jack can speak_. A. English and French B. Chinese and English C. English and Japanese D. French and Chinese 5._ students are Chinese in Jacks class. A. Six B. Five C. Four D. Nineteen (B)Mr. Hu teaches us P.E. this term. He is a nice teacher from England. He is very tall. He likes wearing a white shirt and black trousers. He speaks English very well. We like his classes because his classes are very interesting. His home is not so far from the school. Sometimes we go to his home and play with his twin sons. His sons are only two years old. They look the same and often wear the same clothes. Mr. Hu calls them Da Ming and Xiao Ming. 根据短文内容回答下列问题 1. What does Mr Hu teach? 2. Where is he from? 3. Where does he live? 4. How old are his sons? 5. What are his sons names? 从下面方框中的A-G选项中选择适当的答语,补全对话其中有两项是多余选项 A. Yes, but only a little. B. The people and the food. C. No, I come from Australia. D. I like it very much. E. What about you? F. Yes, I like it. G. Were from Canada.1. Where are you from? _ 2. Do you speak English? _ 3. How do you like China? _ 4. What do you like about China?_ 5. Do you come from England?_ 1.Thepostofficeis_FifthAvenue.A.ofB.onC.acrossD.from2._,isthereapayphoneintheneighborhood?A.ImsorryB.SorryC.ExcusemeD.Excuse3.Theyre_Australia.WereChinese.A.comefromB.comingfromC.fromD.for4.-CanIhelpyou?-_.A.Yes,youB.No,youcantC.IdlikeapizzaD.Ilikeapizza5._you_soccerovertheweekend?A.Did,playedB.Do,playedC.Did,playD.Did,plaied6.Ifyouwant_jazz.PleasegototheFantasticHouse.A.listentoB.hearC.tolistentoD.tolisten7.Thewoman_glassesisourEnglishteacher.

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论