最新2018-2019年八年级数学第一次月考试卷

最新2018-2019年八年级数学第一次月考试卷八年级 数 学（总分：150分，时间：120分）班级： 姓名： 得分： 一选择题（每题4分，总40分。）1下列每组数分别是三根木棒的长度，能用它们摆成三角形的是()A3 cm，4 cm，8 cm B8 cm，7 cm，15 cmC5 cm，5 cm，11 cm D13 cm，12 cm，20 cm2如图，木工师傅在做完门框后，为防止变形常常象图中所示那样钉上两条斜拉的木条（图中的AB，CD两根木条），这样做是运用了三角形的（） （第2题图） （第3题图）A全等性 B灵活性 C稳定性 D对称性3如图，在ABC中，D是BC延长线上一点，B=50，ACD=120，则A=（）A50 B60 C70 D804已知一个多边形的内角和为1080，则这个多边形是（）A. 九边形 B. 八边形 C. 七边形 D. 六边形5以下图中能表示ABC的BC边上的高的是() A B C D6如果三角形的三个内角的度数比是2：3：4，则它是（）A锐角三角形 B钝角三角形 C直角三角形 D钝角或直角三角形7若等腰三角形中有两边长分别为2和5，则这个三角形的周长为()A9 B12 C7或9 D9或128如图，AE是ABC的中线，已知EC4，DE2，则BD的长为()A2 B3 C4 D6 (第8题图) （第9题图） 9如图，将边长相等的正方形、正五边形和正六边形摆放在平面上，则1为（）A32 B36 C40 D4210已知a，b，c是ABC的三条边长，化简|a+bc|cab|的结果为（）A2a+2b2c B2a+2b C2c D0二，填空题（每题3分，总30分。）11四边形的内角和是_12正多边形一个外角的度数是60，则该正多边形的边数是_13一个多边形的内角和是外角和的2倍，则这个多边形是 14已知ABC的两条边长分别为3和5，且第三边的长c为整数，则c的取值可以为_（答案不唯一）15如图，点D在ABC的边BC的延长线上，CE平分ACD，A80，B40，则ACE的大小是_度 （第15题图 ） （第16题图） （第17题图） （第18题图）16如图，ABCD，则DEC=100，C=40，则B的大小是 17将一副直角三角尺按如图所示摆放，则图中的度数是 18如图，ABC中，点D在BA的延长线上，DEBC，如果BAC=65，C=30，那么BDE的度数是 19如图，是六边形ABCDEF，则该图形的对角线的条数是 条 （第19题图） （第20题图）20如图，AD是ABC的中线，已知ABD的周长为25 cm，AB比AC长6 cm，则ACD的周长为_cm.三，解答题（总80分）21（10分）如图，CD是ACB的角平分线，DEBC，AED70，求EDC的度数 22.（12分）一个多边形的内角和比外角和的3倍少180,求 (1)这个多边形的边数. (2)该多边形共有多少条对角线? 23（14分）如图，已知：点P是ABC内一点（1）求证：BPCA；（2）若PB平分ABC，PC平分ACB，A=40，求P的度数 24(14分) 如图，在BCD中，BC=4，BD=5，（1）求CD的取值范围； （2）若AEBD，A=55，BDE=125，求C的度数 （第24题图）25.(14分)四边形ABCD中,A=140,D=80. (1)如图1,若B=C,试求出C的度数.(2)如图2,若ABC的平分线BE交DC于点E,且BEAD,试求出C的度数. 26(16分)如图，在ABC中，ADBC，AE平分BAC，B=70，C=30求：（1）BAE的度数； （2）DAE的度数；（3）探究：小明认为如果条件B=70，C=30改成BC=40，也能得出DAE的度数？若能，请你写出求解过程；若不能，请说明理由精编2018-2019年七年级英语上第一次月考试卷七年级 英 语 (考试时间：120分钟 总分：150分)Class: Name: Marks: 注意事项：1、答题前填写好自己的姓名、班级、考号等信息。2、请将答案正确填写在答题卡上。第卷（选择题 共85分）I. 单项选择。(A)选出可以填入空白处的最佳选项。（15小题，每题2分，共30分）( )1._ is he? He is my friend.A. What B. Where C. Who D. How( )2. Mary and Joy are _ Class One. They are _ the U.S.A.A. from; in B. in; from C. to; from D. in; to( )3. _ Yes, Im Mike.A. Whats your name? B. What are you? C. How are you? D. Are you Mike?( )4.Is this _ car? Yes, its _ English car.A. a; an B. a; a C. an; an D. an; a( )5.What are those? _ are cakes.A. These B. We C. Those D. They( )6.Whats that _ English? Its a desk.A. from B. to C. in D. /( )7. 当别人称赞你时, 你应该说: “_”。A. Thanks. B. Good. C. Yes. D. No.( )8.Is her name Sally? _A. Yes, she is. B. No, she isnt. C. Yes, its. D. No, it isnt.( )9. Im in Class 4. Are you in Class 4, _?A. either B. too C. and D. also( )10. Welcome to Beijing! _A. Welcome to Beijing, too. B. Thanks.C. Fine, thanks. D. Yes, I am.( )11. _, are you Michael? No, Im not. Im Ben.A. How are you B. OK C. Excuse me D. Thanks( )12. This is my teacher, Miss Chen. _ is from Beijing.A. She B. He C. Her D. His( )13. Linda is fifteen _.A. year B. years C. years old D. year old( )14. _ . B-O-O-K,book.A. Can you spell it, please? B.Whats this in English?B. How do you spell it? D. How are you? ( )15. What _ is Maria in? She is in _ Six.A. Class; Class B. Class; class C. class; class D. class; Class(B)选出与划线部分意思相同或相近的最佳选项。（5小题，每题1分，共5分）( )16.Whats your name? My name is Li Ming.A. You are B. I am C. I is D. She is( )17.Thank you very much. You are welcome.A. Thats OK. B. Fine, thanks. C. Nice to see you. D. Good morning( )18.How are you? Fine,thanks.A. Yes, she is. B. Goodbye! C. No,she isnt. D. Im OK.( )19.Here you are. Thanks.A. Thats OK. B. Thank. C. Thank you. D. Bye.( )20.Theyre Maria and Jane.A.They am B. They is C. They are D.You are. 完形填空。（10小题，每题1分，共10分） Hello! 21 name is Li Ying. Im twelve. Im from Kunming. Now Im in Beijing No.14 High School. Im 22 Class Five, Grade Seven. Miss Gao 23 my English teacher. She is 24 old teacher. I have(有) a pen, a ruler and two 25 in my pencil-box(文具盒). Liu Ping is in Grade Seven, too. 26 is from Guangzhou. She is my good 27 . We are in 28 same class. Now she can 29 English well(好). I think(认为) she is a good girl. Look！ 30 is that? She is Liu Ping.( )21. A. I B. My C. Your D. Me( )22. A. from B. to C. not D. in( )23. A. is B. are C. am D. be( )24. A. a B. an C. good D. /( )25. A. buses B. desks C. schoolbags D. pencils( )26. A. He B. His C. She D. Her( )27. A. friend B. teacher C. student D. mom( )28. A. these B. the C. an D. a( )29. A. spell B. speak C. help D. see( )30. A. How B. What C. Where D. Who . 阅读理解（15小题，每题2分，共30分） AName Age From TelZhong Nan 40 Beijing 8876-5342Gao Ming 13 Shanghai 5673-6981Martin 28 England 7342-6979( )31. Gao Ming is from _. A. the U.S.A. B. Japan C. China D. Canada( )32. Martin is _. A. Chinese B. Japanese C. American D. English( )33. Is Zhong Nan from China? A. No, he is. B. No, he isnt. C. Yes, he is. D. Yes, it is.( )34. How old is Zhong Nan? A. 8876-5342 B. 13 C. 28 D. 40( )35. His telephone number is 5673-6981. Who is he?A. He is Martin. B. He is Zhong Nan. C. He is Gao Ming. D. He is 40.BHello! My name is Joy. Im a girl. Im eleven. Im in Class Eight, Grade Seven. This is my friend, Joan. She is twelve. She is in a high school. She is in Class Seven, Grade Eight. My English teacher is Miss White, but her English teacher is Miss Green. Look！Whos that? Oh, shes my mom. Shes a Chinese(语文, 中文) teacher.( )36. _ is in Class Eight, Grade Seven.A. Joan B. John C. Joy D. Joe( )37. Joan is Joys _.A. teacher B. friend C. student D. mom( )38. Joan is _. A. eleven B. twelve C. thirteen D. fourteen( )39. Joys English teacher is _.A. Miss White B. Miss Green C. Joys mom D. Joan( )40. Joys mother is _.A. an English teacher B. a friendC. a student D. a Chinese teacher CHello! My name is John Brown. Im from England. Im an English teacher. Im in Beijing International School.My telephone number is 8523-3237. Zhang Hao, Alice and Yingzi are my students. Im Zhang Hao. My English name is Peter. Im eleven years old. Im from Beijing. My telephone number is 8876-5342.Alice Brown is my name. Im twelve. Im from Canada. My mom is a teacher. My telephone number is 7342-6979.Im Yingzi. Im fourteen years old. Im from Japan. 5673-6981 is my telephone number.( )41. Where is John Brown from?America B. China C. England D. Japan( )42. Peter is a .A. girl B. teacher C. mom D. student( )43. Alice is a girl. Her telephone number is .A. 5673-6981 B. 8876-5342 C. 7342-6979 D. 8523-3237( )44. How old is Yingzi?A. 11. B. 12. C. 13. D. 14.( )45.下面哪一项叙述是不正确的？A. John Brown is an English teacher. B. Zhang Hao is from China.C. Alice is a teacher. D. Yingzi is a girl student. . 补全对话。（5小题，每题2分，共10分，其中有两个选项多余）A. Welcome to China.B. Whats your telephone number?C. Are you Maria?D. Whats your name, please?E. Thats OK.F. Where are you from?G. How are you?A: Excuse me, 46. B: My name is Maria. A: 47. B: Im from Cuba.A: 48. B:It is 4383927.A: 49. B: Thank you very much.B: 50. 46._ 47._ 48._ 49._ 50._第卷（非选择题 共65分）V. 词汇（A）用所给单词的适当形式填空。（5小题，