2013中考选择填空120题(精选)
2013中考选择填空120题（精选）
( )1.Cathy likes playing _____piano, but she doesn’t like playing _____basketball.
A.the , the
B. /, the
C. the , /
D. /, /
( )2. Were you born ______July 11,1994?
A. in
B. on
C. from
D. at
( )3.The man took away the dictionary but did not ______.
A. pay it
B. pay for it
C.cost it
D. spend it ( )4. English teachers often encourage the students _______ English aloud.
A. read
B. reading
C. to read
D. readed ( )5.--- ______he ever ______abroad ?
---No, never.
A. Did, go
B. Is, been C Has, been D. Has, gone ( )6. How long may I ______ the history books?
A. keep
B. lend
C. borrow
D. give
( )7. She______ an English teacher.
A. uses to
B. used to
C. use to be
D. used to be
( )8. One day the librarian ______ an idea.
A. came up
B. came with
C. came up with
D. came up to
( )9. Now her lost books are usually______ the library.
A .returned
B .returned to C. paid D. paid to
( )10. It was raining hard, so they decided_____ soccer.
A. to stop to play
B. stopping to play
C. to stop playing
D. stopping playing
( )11. Can you ______who has lost the watch?
A. look for
B. look up
C. find
D. find out
( )12. My postcard is still on the desk. Why ______you ______it ?
A. haven't , posted
B. didn't, post
C. wasn't posting
D. won't, post ( )13. The man ____France will give us a talk ____his country.
A. from, on
B. of, in
C. of, about
D. from, of
( )14. He is too old to ______the name of that book.
A. pick up
B. think of
C. come up
D. fill in
( )15. Someone is knocking at the door. It ____my father. It's time for him to be back.
A. can be
B. may not be
C. must be
D. mustn’t be ( )16. I don’t know where Mr. White has gone. You’d better ask ____.
A. else somebody
B. other somebody
C. somebody else
D. anybody else ( )17. When he saw a ticket on the ground, he stopped ____.
A. to pick it up
B. pick it up
C. to pick up it
D. pick up it ( )18. He says that he will ______to me in three days.
A. return the money
B. return back the money
C. get the money back
D. pay back the money
( )19. Father ______the city of New York three days ago.
A. leave
B. left to
C. left off
D. left for
( )20. Tom ______ there for 10 months since he ______ back to his hometown.
A. has lived, gets
B. has lived, got
C. lived, go
D. lived, has got
( )21. He is _______ to London for holidays?
A. consider going
B. to considering going
C. consider to go
D. considering going
( )22. The film is very ___. Tom is very ____.
A. exciting, excited
B. excited, exciting
C. exciting, exciting
D. excited, excited
( )23. _______the weather will be like tomorrow, we’ll go camping.
A. No matter how
B. No matter what's
C. No matter what
D. No matter if
( )24. There is a ______ river near our village.
A. Three-hundreds-meters-long
B. three-hundred-meter-long
C. three-hundred-meters-long
D. three hundred meters long
( )25. He has not had a night ____for two weeks, but he still feels ____.
A. off, happy
B. away, happily
C. off, happily
D. away, happy ( )26. It makes him ____.
A. feel angrily
B. feel angry
C. to feel angry
D. feeling angry ( )27. It's ____good food that we all like it very much.
A. so a
B. such a
C. so
D. such
( )28. When you ____the street, you must look first.
A. across
B. go cross
C. cross
D. goes across
( )29. Look! Mrs. Green is talking ____the students of Class I on the ground.
A. among
B. in the middle of
C. between
D. at
( )30. Her teacher thinks ____other.
A. high
B. highly
C. well
D. good
( )31. Shenzhou IX is the ____of all the people in China.
A. pride
B. proud
C. prideful
D. proudly
( )32.---Have you finished your homework_____?
---No, not_____.
A.already, already
B.yet, yet
C.already, yet
D.yet, already ( )33. Neither you or he ______ Hawaii before.
A. has gone to
B. have gone to
C. have been to
D. has been to
( )34. Jinan is very famous ______Baotu Spring.
A. to
B. of
C. in
D. for
( )35. Bruce has lived here ______last year.
A. /
B. for
C. before
D. since
( )36. Waikiki is one of the best beaches ______ surfing in Honolulu.
A. to
B. for
C. with
D. in
( )37. I've never ______ him before.
A. heard of
B. hear from
C. heard to
D. hear about
( )38. ---Excuse me. Could you tell me ____?
---Certainly.
A. when can I get to the station
B. I can get to which station
C. which station can I get to
D. how I can get to the station
( )39. Then he slowed ______ as the wind became stronger and the waves higher.
A. under
B. below C .down D .slowly ( )40. All of us except him _______ to Hong Kong.
A. have gone
B. has gone
C. have been
D. has been ( )41.How long has Jim ____ at this school?
A. arrived
B. come
C. studied
D. gone
( )42. The little girl is afraid of ____ at night.
A. go
B. goes
C. going
D. went
( )43. As soon as he ____, he will write to me.
A. arrives at
B. arrives
C. reaches
D. gets
( )44. The teacher is ____ with what we did.
A. pleased
B. please
C. pleasure
D. pleasant
( )45. ____ will he be back? In a week.
A. How long
B. How soon
C. How often
D. How many ( )46. I have to do my homework for ______ every day.
A. one and half hour
B. one and a half hour
C. one and half hours
D. one and a half hours
( )47. Who plays tennis ______ Li Na?
A. so well as
B. as well as
C. so better than
D. as good as
( )48. The girl had a short rest and did her homework ______ she reached home.
A. after
B. before
C. when
D. since
( )49. We have known each other ______ we were young.
A. for
B. since
C. after
D. before
( )50. They ______ very busy last month.
A. are
B. were
C. be
D. have been
( )51. There ______ a park near our school since two years ago.
A. is
B. was
C. has been
D. will be
( )52. Lucy is very free. Look, she ______ a model ship.
A. makes
B. made
C. has made
D. is making ( )53. Many students in our class ______ glasses over their eyes in class.
A. put on
B. dress
C. wear
D. get dressed ( )54. What do you think we should ________ improve our environment?
A. do
B. to
C. do for
D. do to
( )55. They've found a way to ______ that waste thing.
A. do
B. do with
C. throw
D. move away
( )56. We find the book very ______.
A. interest
B. interesting
C. interests
D. interested
( )57. She has _____ finished her lunch, but she hasn't washed her bowls ______.
A. already, yet
B. just, already
C. already, just
D. just, yet ( )58.Mr Liu has been here ______ ten years ago.
A. for
B. since
C. in
D. at
( )59. They went to London ______ just over five months.
A. for
B. since
C. before
D. when
( )60. The weather was ______ it is today.
A. not as wetter as
B. not wetter than
C. more wetter than
D. wetter as ( )61. The little boy was ________with the big boy because he was ____words to him.
A. fond, speaking
B. angry, saying
C. angry, talking
D. friendly, telling ( )62. Lucy, please don't play with fire. __________.
A. How can you say like that?
B. It's right.
C. It doesn't matter.
D. Sorry, I won't do it again.
( )63. We don't know If it _____. If it_____, we won' t go out for a walk.
A. rains, will rain,
B. rains, rains
C. will rain, will rain
D. will rain, rains
( )64. It's difficult _____your sound because the noise is too high.
A. to listen
B. to know
C. to learn
D. to hear
( )65. He says ____he will be back soon.
A. when
B. what
C. that
D. where
( )66. He told a very ____story about his life in America.
A. live
B. living
C. lively
D. life
( )67. If you don't get up early, you' ll ____the early bus.
A. not miss
B. miss
C. catch
D. lost
( )68. How long ____it ___to go there by train?
A. do, take
B. does, take
C. does, spend
D. does, play
( )69. A young man practiced ______ English with Mr. Green.
A. speak
B. speaking
C. to speak
D. speak in
( )70. She says she can get to Rt-mart from her home on foot_____ ten minutes.
A. after
B. in
C. before
D. about
( )71. We should help her when she is ________.
A. in trouble
B. in a trouble
C. in the trouble
D. in troubles ( )72. The policeman kept the thief ________ for four hours.
A. standing
B. to stand
C. to sit
D. siting
( )73. I want to visit England ______.
A. if it possible
B. as soon possible
C. as soon as possible
D. if possible ( )74. They ______Hong Kong twice.
A. have gone to
B. have been to
C. have been in
D. have gone in ( )75. I have never seen _____film before.
A. a so interesting
B. a such interesting
C. so a interesting
D. such an interesting
( )76. Everyone went to the zoo last Sunday ______Jim.
A. but
B. not
C. except
D. besides
( )77. What ______just now?
A. was happened
B. were happened
C. happened
D. happens ( )78. If you miss so many lessons, you must fall behind ____ classmates.
A.another
B. the others
C. other
D. the other
( )79. ______ did Lin Tao say about Mount Tai?
A. What
B. How
C. When
D. Why ( )80. I’m afraid ______ you may be late.
A. when
B. that
C. why
D. how
( )81. I ______ able to sing any song but this one.
A. may
B. can
C. am
D. would
( )82. Everybody is here _______ Jim Green.
A. as
B. with
C. on
D. except
( )83. Which of these do you think is ____ useful invention?
A.the more
B. the second more
C. most
D. the second most
( )84. Do you know where ______ from?
A. he come
B. he comes
C. did he come
D. does he came ( )85. Our teacher saw us ______ on the desks and went out of the classroom.
A. to sit
B. sat
C. siting
D. sitting
( )86. I______ math and science.
A. interest
B. am interesting
C. am interested
D. am interested in ( )87. Linda will look after the children _____ we’re away.
A. that
B. during
C. while
D. where
( )88. David was born _____.
A. since twenty years ago
B. for twenty years
C. twenty years ago
D. just over twenty years
( )89.Mike _____ his homework three hours ago.
A. finished
B. has finished
C. is finishing
D. is going to finish ( )90.---____ have you been at this school, Mr Li ?
---I've been here since 2003.
A. When
B. How long
C. What time
D. How often
( )91.Allan cut the big birthday cake _____ small pieces.
A. as
B. to
C. into
D. in
( )92.When he was a child, he was always _______ out new ideas.
A. try
B. trying
C. taking
D. tried
( )93There_________ a basketball match this afternoon.
A is going to be
B is going to have
C are going to be
D are going to have ( )94.It’s very kind ____ you _____lend your bike to me.
A. of, to
B. for, in
C. for, to
D. of, in
( )95.---Are you ________ with what he said?
---No, but he really made me ________.
A. annoyed; disappointed
B. annoyed; disappointing
C. annoying; disappointed
D. annoying; disappointing
( )96.“ ______ do you write to your parents ?”“ Once a month.”
A. How long
B. How much
C. How far
D. How often
( )97.He asked who was _______ in your class.
A. the oldest
B. oldest
C. older
D. the older ( )98.The teacher told us ______ Exercise 1 in our exercise books.
A. do
B. to do
C. doing
D. does
( )99.I found _____ very difficult to learn math well.
A. what
B. it
C. that
D. this
( )100.I' m ______ to trouble you.
A. glad
B. afraid
C. fear
D. sorry
( )101.---I haven’t seen the film Pirates of the Caribbean: On stranger Tides.
---____________.
A.Neither have I
B. So have I
C. Neither I have
D. So I have ( )102. Lucy looked for her book, but she couldn’t find it _____.
A. somewhere
B. everywhere
C. anywhere
D. nowhere
( )103.No one told us _____, so we need your help.
A. how should we do
B. how to do it
C. what should we do
D. what to do it ( )104. They were very proud______ their daughter.
A. for
B. of
C. with
D. about
( )105.---When did you ______the book to the library?
---Yesterday afternoon.
A. borrow
B. lend
C. give
D. return
( )106.---Jack, you look tired. What’s wrong?
---I was _______ busy _______ I didn't go to bed until midnight yesterday.
A too, to
B enough, to
C so , that
D such, that
( )107.All of us find important to study English. Please study hard.
A. one
B. that
C. this
D. it
( )108.—Can you speak English?
— Yes, only________
A. few
B. a few
C. little
D. a little
( )109. I have two pens. One is red, ________ is black.
A. other
B. another
C. the other
D. the others
( )110.---Jack, what do you usually do after supper?
---Well, I ______stay at home and watch TV, but now I ______taking a walk.
A. used to, used to
B. used to, am used to
C, am used to, used to D, am used to, am used to
( )111.---Do you like the hero in the book _________ fights for freedom all the time?
---Yes, of course. I think he is great.
A. which
B. who
C. what
D. whom
( )112.---A number of students in the dinning hall.
---Let me count. The number of the students about 300.
A.are, is
B. are, are
C. is, are
D. is, is
( )113.---The guitar might belong to Alice.
---It be hers. She doesn’t play the guitar.
A. might
B. mustn’t
C. can’t
D. may
( )114. My hobby is ______all kinds of coins.
A. to collect
B. to collecting
C. to pick up
D. picking up ( )115.Shenzhou IX _______to space in 2012.
A.sent
B. was sent
C. has sent
D. was sending
( )116.I know _______English words and just ________Japanese.
A. a little, a few
B. a few, a little
C. little, few
D. few, little ( )117.---Sorry! I can’t help you now
--- ___________.
A. You’re welcome.
B. That’s all right.
C. Thank you.
D. You’re right.
( )118.Do you know the girl _______big eyes and long black hair?
A.in
B. of
C. with
D. on
( )119.You need some help with your English,_______?
A.needn’t you
B. doesn’t you
C. haven’t you
D. don’t you
( )120. ---Did you finish your homework on time yesterday.
---No, I didn't _______ on time. By the time I finished it, all my classmates_______.
A. finish it, handed it in
B. finish it, had handed in it
C. make it, handed it in
D. make it, had handed it in
中考数学几何选择填空压轴题精选
中考数学几何选择填空压轴题精选 一．选择题（共13小题） 1．（2013?蕲春县模拟）如图，点O为正方形ABCD的中心，BE平分∠DBC交DC于点E，延长BC到点F，使FC=EC，连接DF交BE 的延长线于点H，连接OH交DC于点G，连接HC．则以下四个结论中正确结论的个数为（） ①OH=BF；②∠CHF=45°；③GH=BC；④DH2=HE?HB． A．1个B．2个C．3个D．4个 2．（2013?连云港模拟）如图，Rt△ABC中，BC=，∠ACB=90°，∠A=30°，D1是斜边AB的中点，过D1作D1E1⊥AC于E1，连结BE1交CD1于D2；过D2作D2E2⊥AC于E2，连结BE2交CD1于D3；过D3作D3E3⊥AC于E3，…，如此继续，可以依次得到点E4、E5、…、E2013，分别记△BCE1、△BCE2、△BCE3、…、△BCE2013的面积为S1、S2、S3、…、S2013．则S2013的大小为（） A．B．C．D． 3．如图，梯形ABCD中，AD∥BC，，∠ABC=45°，AE⊥BC于点E，BF⊥AC于点F，交AE于点G，AD=BE，连接DG、CG．以下结论：①△BEG≌△AEC；②∠GAC=∠GCA；③DG=DC；④G为AE中点时，△AGC的面积有最大值．其中正确的结论有（） A．1个B．2个C．3个D．4个 4．如图，正方形ABCD中，在AD的延长线上取点E，F，使DE=AD，DF=BD，连接BF分别交CD，CE于H，G下列结论： ①EC=2DG；②∠GDH=∠GHD；③S△CDG=S?DHGE；④图中有8个等腰三角形．其中正确的是（） A．①③B．②④C．①④D．②③ 5．（2008?荆州）如图，直角梯形ABCD中，∠BCD=90°，AD∥BC，BC=CD，E为梯形内一点，且∠BEC=90°，将△BEC绕C点旋转90°使BC与DC重合，得到△DCF，连EF交CD于M．已知BC=5，CF=3，则DM：MC的值为（） A．5：3B．3：5C．4：3D．3：4 6．如图，矩形ABCD的面积为5，它的两条对角线交于点O1，以AB，AO1为两邻边作平行四边形ABC1O1，平行四边形ABC1O1的对角线交BD于点02，同样以AB，AO2为两邻边作平行四边形ABC2O2．…，依此类推，则平行四边形ABC2009O2009的面积为（） A．B．C．D． 7．如图，在锐角△ABC中，AB=6，∠BAC=45°，∠BAC的平分线交BC于点D，M，N分别是AD和AB上的动点，则BM+MN的最小值是（） A．B．6C．D．3 8．（2013?牡丹江）如图，在△ABC中∠A=60°，BM⊥AC于点M，CN⊥AB于点N，P为BC边的中点，连接PM，PN，则下列结论：①PM=PN；②；③△PMN为等边三角形；④当∠ABC=45°时，BN=PC．其中正确的个数是（） A．1个B．2个C．3个D．4个 9．（2012?黑河）Rt△ABC中，AB=AC，点D为BC中点．∠MDN=90°，∠MDN绕点D旋转，DM、DN分别与边AB、AC交于E、F两点．下列结论： ①（BE+CF）=BC； ②S△AEF≤S△ABC； ③S四边形AEDF=AD?EF； ④AD≥EF； ⑤AD与EF可能互相平分， 其中正确结论的个数是（） A．1个B．2个C．3个D．4个
中考英语综合填空练习题
中考英语综合填空练习题 一. 阅读下面短文，然后从文前方框内所给的词中选出适当的词，并用其正确形式填空（每空限选一词）。 （一） ----------------------------------------------------------- call , swim , anything , clever , bear , can , his , give , girl , something , read , take ------------------------------------------------------------- Many years ago , there was a family ___1___ Franklin . They lived in Boston . There were five ___2___ and six boys in the family . On a January day in 1760 , another baby boy ___3___ . They boy’s mother and his father ___4___ the boy a name — Benjamin . Benjamin was the ___5___ of all the children . He could read when he was five and he ___6___ write by the time he was seven . When he was eight he was sent to school . In school Benjamin had been good at ___7___ and writing but not good at maths . He read all of ___8___ father’s books . And whenever （每当）he had a little money , he bought a book with it . He liked books . They told him how to do ___9___ . At that time he invented the paddles （脚蹼）for ___10___ . （二） ------------------------------------------------------ say , surprise , do , in , friend , to , visits , we , usual , or , welcome , time , for , but , ideas ------------------------------------------------------- Manners are important in every country , ___1___ people have different ___2___ about their manners . What is good in one country may not be ___3___ in another . Chinese people are ___4___ to know the fact that an Englishman ___5___ stop to talk and shake hands with his friend ___6___ the street . They just say hello ___7___ each other and then pass on . English people think that ___8___ Chinese end our ___9___ to friends all of a sudden . They ___10___ begin to show that they want to go 15 ___11 20 minutes before they leave their ___12___ house . And they do this two or three ___13___ within 20 minutes . It is important ___14___ people to understand each other . Here is a ___15___ , “When in Rome , do as the Romans do .” （三） ---------------------------------------------------------- need , animal , I , put , make , except , find , end , look , since , little , enough
(完整版)中考选择填空压轴题专项练习
20 2.（ 2015?苏州）如图，在一笔直的海岸线 初二中考数学压轴题专题 珏辅砸专项突服（一）i*空、选抒压紬礎 选择题中的压轴题和一般选择题相比，具有综合性较强、数形兼备、解题方法多样化、充满思 辨性等特点，要求学生综合运用多种知识解题，思维要有一定的广度和深度，并会运用多种不同的 方法灵活解题?这类题目重点考察学生综合分析问题、解决问题的能力 解题方法：解答这类题目的方法除常用的直选法、观察法外，重点要掌握排除法和代入法 ?根据 题目条件从四个选项中逐次排除选项的方法，包括分析排除法和反例排除法两种 ?若用一般方法不能 求解时，可采用代入法，就是根据题目的有关条件，采用某些特殊情况分析问题，或采用某些特殊 值代入计算分析，或将题目中不易求解的字母用符合条件的某些具体的数字代入，化一般为特殊来 分析问题，通常包括已知代入法、选项代入法和特殊值代入法等 ?特别注意：这些方法在通常都是要 综合灵活运用，不能生搬硬套 ? 填空题与选择题相比，没有选项，因此没有错误选项的干扰，但也就缺少了有关信息提示，给 解题增加了一定难度，要求学生要有扎实、熟练的基础知识和基本技能 ?还要灵活运用多种不同的解 题方法? 解题方法：解答填空题常用的方法有直接求解法、数形结合法、构造法、分类讨论法与转化法 等直接求解法就是从已知出发，逐步计算推出未知的方法，或者说由“因”索“果”的方法 很多题目都 需要将题目中的条件与相关图形或图象结合起来考察，这就是数形结合法 ?有时在分析解题过程中所 需要或所缺少的有关条件可通过作辅助线或建立模型等方法来解决问题的方法就是构造法 ?在题目 的相关条件或信息不够明确具体时， 则应分情况求解，也就是分类讨论法?把不易解决的问题或难点, 通过第三个等价的量，转化为已知的或易于解决的问题来解题的方法就是转化法 苏州市中考真题赏析 1. （ 2014?苏州）如图，△ AOB 为等腰三角形，顶点 A 的坐标（2, △ A'0'B',点A 的对应点A 在x 轴上，则点 0的坐标 为（ ） .■），底边0B 在x 轴上?将 △ AOB 绕点B 按顺时针方向旋转一定角度后得 （第 B .
中考数学选择填空压轴题训练整理
1. 如图，C为⊙O直径AB上一动点，过点C的直线交⊙O于D、E两点，且∠ACD=4°5， D F⊥AB 于点F,EG⊥AB 于点G,当点C在AB上运动时，设AF=x ，DE=y ，下列中图象中， 能表示y 与x的函数关系式的图象大致是 2. 如图，在ABCD中，AB=6，AD=9，∠BAD的平分线交BC于点E，交DC 的延长线于点F，BG⊥AE，垂足为G，BG=4 2 ，则ΔCEF的周长为（） （A）8 （B）9.5 （C）10 （D）11.5 3、如图，矩形纸片ABCD中，AB=4，AD=3，折叠纸片使AD边与 对角线BD重合，折痕为 D G，则 A G的长为（） 4 A 1 B．． 3 3 C．D．2 2 4．下面是按一定规律排列的一列数：D C A′ 第1 个数：1 1 1 2 2 ； A G 图 B 第2 个数： 2 3 1 1 ( 1) ( 1) 1 1 1 3 2 3 4 ； 第3 个数： 2 3 4 5 1 1 ( 1) ( 1) ( 1) ( 1) 1 1 1 1 1 4 2 3 4 5 6 ； 第n 个数： 2 3 2n 1 1 1 ( 1) ( 1) ( 1) 1 1 1 L 1 ．n 1 2 3 4 2n 那么，在第10 个数、第11 个数、第12 个数、第13 个数中，最大的数是（） A．第10 个数B．第11 个数C．第12 个数D．第13 个数 5．如图，点A的坐标为( －1，0) ，点B在直线y=x 上运动，当线段AB最短时， 点B的坐标为 y 2 2 2 2 （）（，）（）（ A 0 0 B ， ） B （C）（－1 2 ， － 1 2 ） （D） （－ 2 2 ， － 2 2 ）A O x （第 5 题图）
【英语】 中考英语完形填空练习题基础、提高、难题_汇总(含答案)1
【英语】中考英语完形填空练习题基础、提高、难题_汇总(含答案)1 一、中考英语完形填空（含答案详细解析） 1．阅读下面短文，从短文后各题所给的四个选项（A、B、C、D）中，选出可以填入空白 处的最佳选项。 In Chicago, the USA, there was a girl called Jenny. She was very polite and ready to help everybody. One day she found a brown paper bag on the way to school. She opened it and saw there was a lot of 1 in it. She thought she should hand it in to the teacher, so she 2 it in her schoolbag first. When she went to the office, her teacher wasn't 3 . As it was time for class, she hurried to the classroom. After class, she told her friend, Linda, about the money that she 4 . Then, her greedy （贪婪的） friend 5 away the bag. After school, Jenny wanted to go to the 6 office again, but she found the money was missing. The next day when the children were playing a game, Linda fell down and was hurt very badly. The other children stood around her and didn't know 7 to do. Jenny kept calm and did 8 to stop bleeding. She told the others to go to teachers for 9 . Soon a teacher took Linda to the 10 and the doctor examined her carefully. Within a week she was all right again. Jenny became very 11 in the school. 12 three days, Linda came to Jenny's house. Her 13 turned red. She was crying. She gave Jenny the 14 paper bag with the money in it and said, "Jenny. I have taken the money away. That day when you helped me, I felt very ashamed and now I decide to tell you the 15 . You are such a nice friend! 16 please don't tell the teachers about this!" Then Jenny said," You are now 17 , but you have done a bad thing. Though I will not tell anyone. I want you not to be greedy and never to do anything wrong. The girl thanked Jenny and 18 . At the end of the term Jenny was given a 19 for being a very helpful girl in the school. Linda became an honest girl and was 20 greedy. Once wrong, never be wrong forever. 1. A. bread B. paper C. money D. fruit 2. A. got B. kept C. Sent D. caught 3. A. away B. out C. oft D. in 4. A. lost B. found C. Saved D. made 5. A. took B. brought C. put D. moved 6. A. workers′B. teachers′ C. doctors′ D. headmaster′s 7. A. where B. how C. when D. what 8. A. nothing B. everything C. something D. anything 9. A. leave B. treatment C. action D. help 10. A. office B. classroom C. hospital D. school 11. A. popular B. healthy C. proud D. quiet 12. A. In B. After C. Later D. Before
全国中考数学填空题精选
2017年中考填空题精选一、填空题 1．（常德）计算：|﹣2|﹣ =． 2．（3分）分式方程+1=的解为． 3．（3分）命题：“如果m是整数，那么它是有理数”，则它的逆命题为：． 4．（3分）彭山的枇杷大又甜，在今年5月18日“彭山枇杷节”期间，从山上5棵枇杷树上采摘到了200千克枇杷，请估计彭山近600棵枇杷树今年一共收获了枇杷千克． 5．（3分）如图，已知Rt△ABE中∠A=90°，∠B=60°，BE=10，D是线段AE上的一动点，过D作CD交BE于C，并使得∠CDE=30°，则CD长度的取值范围是． 6．（3分）如图，正方形EFGH的顶点在边长为2的正方形的边上．若设AE=x，正方形EFGH的面积为y，则y与x的函数关系为． 7．（3分）如图，有一条折线A1B1A2B2A3B3A4B4…，它是由过A1（0，0），B1（2，2），A2（4，0）组成的折线依次平移4，8，12，…个单位得到的，直线y=kx+2与此折线恰有2n（n≥1，且为整数）个交点，则k 的值为． 8．（郴州市）在平面直角坐标系中，把点A（2，3）向左平移一个单位得到点A′，则点A′的坐标为．9．（3分）把多项式3x2﹣12因式分解的结果是．10．（3分）为从甲、乙两名射击运动员中选出一人参加市锦标赛，特统计了他们最近10次射击训练的成绩，其中，他们射击的平均成绩都为8.9环，方差分别是S 甲 2=0.8，S 乙 2=1.3，从稳定性的角度来看的成绩更稳定．（填“甲”或“乙”） 11．（3分）已知圆锥的母线长为5cm，高为4cm，则该圆锥的侧面积为cm2（结果保留π） 12．（3分）从1、﹣1、0三个数中任取两个不同的数作为点的坐标，则该点在坐标轴上的概率是．13．（3分）已知a1=﹣，a2=，a3=﹣，a4=，a5=﹣，…，则a8=． 14．（怀化市）因式分解：m2﹣m=． 15．（4分）计算：=． 16．（4分）如图，在?ABCD中，对角线AC、BD相交于点O，点E是AB的中点，OE=5cm，则AD的长是cm． 17．（4分）如图，⊙O的半径为2，点A，B在⊙O上，∠AOB=90°，则阴影部分的面积为．18．（4分）如图，AC=DC，BC=EC，请你添加一个适当的条件：，使得△ABC≌△DEC． 19．（4分）如图，在菱形ABCD中，∠ABC=120°，AB=10cm，点P是这个菱形内部或边上的一点．若以P，B，C为顶点的三角形是等腰三角形，则P，A（P，A两点不重合）两点间的最短距离为cm．
中考数学几何选择填空压轴题精选配答案
中考数学几何选择填空压轴题精选配答案 Pleasure Group Office【T985AB-B866SYT-B182C-BS682T-STT18】
2016中考数学几何选择填空压轴题精选(配答案)一．选择题（共13小题） 1．（2013蕲春县模拟）如图，点O为正方形ABCD的中心，BE平分∠DBC交DC 于点E，延长BC到点F，使FC=EC，连接DF交BE的延长线于点H，连接OH交DC于点G，连接HC．则以下四个结论中正确结论的个数为（） ①OH=BF；②∠CHF=45°；③GH=BC；④DH2=HEHB． A ．1个B ． 2个C ． 3个D ． 4个 2．（2013连云港模拟）如图，Rt△ABC中，BC=，∠ACB=90°，∠A=30°，D1是斜边AB的中点，过D1作D1E1⊥AC于E1，连结BE1交CD1于D2；过D2作 D2E2⊥AC于E2，连结BE2交CD1于D3；过D3作D3E3⊥AC于E3，…，如此继续，可以依次得到点E4、E5、…、E2013，分别记△BCE1、△BCE2、△BCE3、…、△BCE2013的面积为S1、S2、S3、…、S2013．则S2013的大小为（） A ．B ． C ． D ． 3．如图，梯形ABCD中，AD∥BC，，∠ABC=45°，AE⊥BC于点E，BF⊥AC于点F，交AE于点G，AD=BE，连接DG、CG．以下结论： ①△BEG≌△AEC；②∠GAC=∠GCA；③DG=DC；④G为AE中点时，△AGC的面积有最大值．其中正确的结论有（） A ．1个B ． 2个C ． 3个D ． 4个 4．如图，正方形ABCD中，在AD的延长线上取点E，F，使DE=AD，DF=BD，连接BF分别交CD，CE于H，G下列结论：
中考数学压轴题(选择填空)
中考数学压轴题解题技巧 数学综压轴题是为考察考生综合运用知识的能力而设计的，集中体现知识的综合性和方法的综合性，多数为函数型综合题和几何型综合题。 函数型综合题：是给定直角坐标系和几何图形，先求函数的解析式，再进行图形的研究，求点的坐标或研究图形的某些性质。求已知函数的解析式主要方法是待定系数法，关键是求点的坐标，而求点的坐标基本方法是几何法（图形法）和代数法（解析法）。 几何型综合题：是先给定几何图形，根据已知条件进行计算，然后有动点（或动线段）运动，对应产生线段、面积等的变化，求对应的（未知）函数的解析式，求函数的自变量的取值范围，最后根据所求的函数关系进行探索研究。一般有：在什么条件下图形是等腰三角形、直角三角形，四边形是平行四边形、菱形、梯形等，或探索两个三角形满足什么条件相似等，或探究线段之间的数量、位置关系等，或探索面积之间满足一定关系时求x的值等，或直线（圆）与圆的相切时求自变量的值等。求未知函数解析式的关键是列出包含自变量和因变量之间的等量关系（即列出含有x、y的方程），变形写成y＝f（x）的形式。找等量关系的途径在初中主要有利用勾股定理、平行线截得比例线段、三角形相似、面积相等方法。求函数的自变量的取值范围主要是寻找图形的特殊位置（极端位置）和根据解析式求解。而最后的探索问题千变万化，但少不了对图形的分析和研究，用几何和代数的方法求出x的值。 解中考压轴题技能：中考压轴题大多是以坐标系为桥梁，运用数形结合思想，通过建立点与数即坐标之间的对应关系，一方面可用代数方法研究几何图形的性质，另一方面又可借助几何直观，得到某些代数问题的解答。关键是掌握几种常用的数学思想方法。 一是运用函数与方程思想。以直线或抛物线知识为载体，列（解）方程或方程组求其解析式、研究其性质。 二是运用分类讨论的思想。对问题的条件或结论的多变性进行考察和探究。 三是运用转化的数学的思想。由已知向未知，由复杂向简单的转换。中考压轴题它是对考生综合能力的一个全面考察，所涉及的知识面广，所使用的数学思想方法也较全面。因此，可把压轴题分离为相对独立而又单一的知识或方法组块去思考和探究。 解中考压轴题技能技巧： 一是对自身数学学习状况做一个完整的全面的认识。根据自己的情况考试的时候重心定位准确，防止“捡芝麻丢西瓜”。所以，在心中一定要给压轴题或几个“难点”一个时间上的限制，如果超过你设置的上限，必须要停止，回头认真检查前面的题，尽量要保证选择、填空万无一失，前面的解答题尽可能的检查一遍。
【英语】中考英语语法填空练习题经典1
【英语】中考英语语法填空练习题经典1 一、初三中考语法填空（含答案详细解析） 1．阅读下面的短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。 Sitting at a desk in a classroom all day can be pretty boring. With a bike, the reading class can be ________ （interesting） than before. The teachers in ________ school in the USA have tried this. The Read and Ride program ________（begin） five years ago. As part of the Read and Ride program, the teachers change the students'________ （desk）into exercise bikes. With this program, one classroom in the school has enough bikes for each student in class. ________ is possible for the students to ride bikes and read books at the same time. Even common classrooms have one bike at the back of them. The students who cannot sit still can use the bike ________ （do） exercise. The exercise bikes are not only good for the students' health but helpful in ________ （improve）the efficiency of the students' study. When students are bored with study, they can relax themselves ________ riding the bikes for a while. After keeping trying the program for one year, the teachers found that the students ________ took part in the program did much better in reading tests. ________ amazing it is! 【答案】 more interesting；a；began；desks；It；to do；improving；by；who/that；How 【解析】【分析】文章大意：文章介绍了美国的一所学校采取的一种有趣的教学方法来提高学生们的阅读能力，这种方法是边骑车边阅读。这种方法的使用收到了良好的效果。（1）句意：使用自行车，阅读课比以前更有趣。根据than，可知应使用形容词的比较级，interesting的比较级为more interesting，故答案是more interesting。 （2）句意：美国一个学校的老师尝试了这一种方法。school使用的单数形式，而且并没有特指哪一所学校，因此应使用不定冠词，school是以辅音字母开始，因此应使用不定冠词a，故答案是a。 （3）句意：边阅读边骑自行车的项目开始于五年前。根据five years ago可知应使用过去时，begin的过去式是began，故答案是began。 （4）句意：作为阅读和骑行计划的一部分，老师将学生的课桌变成了自行车。一个班里的学生不只有一个，因此课桌也就不止一个，因此应使用复数形式desks，故答案是desks。 （5）句意：对于学生来说在同一时间边骑自行车边阅读成为了可能。固定搭配，it is+形容词+for sb to do，对于某人来说做某事怎样，故答案是it。 （6）句意：那些不能坐下的学生仍然可以使用自行车做练习。做练习是使用自行车的目的，因此应使用动词不定式做目的状语，故答案是to do。 （7）句意：运动自行车不仅有利于学生们的健康，而且能够帮助学生们提高他们的学习效率。in为介词，介词后的动词使用动名词，故答案是improving。 （8）句意：他们可以通过骑一会自行车来放松。骑自行车是他们放松的方式，一般使用by来引出方式状语，故答案是by。 （9）句意：老师发现那些参加了该项目的学生在阅读考试的时候做的更好。本句为定语从句，先行词students属于人，而且在从句中做主语，因此关系代词可以使用who或者
中考数学综合题专题【成都中考B卷填空题】专题精选七
中考数学综合题专题【成都中考B 卷填空题】专题精选七 1．在Rt △ABC 中，∠C ＝90°，AC ＝6，cot B ＝ 4 3 ，P 、Q 分别是边AB 、BC 上的动点，且AP ＝BQ ．若PQ 的垂直平分线过点C ，则AP 的长为_____________． 2．如图，在△ABC 中，AB ＝AC ＝5，BC ＝6，D 是AC 边的中点，E 是BC 边上一动点（不与端点重合），EF ∥BD 交AC 于F ，交AB 延长线于 G ，H 是BC 延长线上一点，且CH ＝BE ，连接FH ． （1）连接AE ，当以GE 为半径的⊙G 和以FH 为半径的⊙F 相切时，tan ∠BAE 的值为____________； （2）当△BEG 与△FCH 相似时，BE 的长为_________________． 3．在直角梯形ABCD 中，AD ∥BC ，∠C ＝90°，AD ＝1，AB ＝5，CD ＝4，P 是腰AB 上一动点，PE ⊥CD 于E ，PF ⊥AB 交CD 于F ，连接PD ，当AP ＝________________________时，△PDF 是等腰三角形． 4．如图，∠AOB ＝30°，n 个半圆依次相外切，它们的圆心都在射线OA 上，并与射线OB 相切．设半圆C 1、半圆C 2、半圆C 3、…、半圆C n 的半径分别是r 1、r 2、r 3、…、r n ，则 r 2012 r 2011 ＝ ___________． A B C P Q A B C D E F H A B C P D E F 1 2 3
5．如图，n 个半圆依次外切，它们的圆心都在x 轴的正半轴上，并与直线y ＝ 3 3x 相切．设 半圆C 1、半圆C 2、半圆C 3、…、半圆C n 的半径分别是r 1、r 2、r 3、…、r n ，则当r 1＝1时，r 3＝___________，r 2012＝___________． 6．如图，在△ABC 中，AB ＝AC ＝10cm ，BC ＝16cm ，长为4cm 的动线段DE （端点D 从点B 开始）沿BC 边以1cm /s 的速度向点C 运动，当端点E 到达点C 时运动停止．过点E 作EF ∥AC 交AB 于点F ，连接DF ，设运动的时间为t 秒． （1）当t ＝_______________秒时，△DEF 为等腰三角形； （2）设M 、N 分别是DF 、EF 的中点，则在整个运动过程中，MN 所扫过的面积为___________cm 2． 7．如图，在平面直角坐标系中，直线l 1：y ＝ 3 4 x 与直线l 2：y ＝－ 4 3 x ＋ 20 3 相交于点A ，直 线l 2与两坐标轴分别相交于点B 和点C ，点P 从点O 出发，以每秒1个单位的速度沿线段OB 向点B 运动；同时点Q 从点B 出发，以每秒4个单位的速度沿折线B →O →C →B 的方向向点B 运动，过点P 作直线PM ⊥OB ，分别交l 1、l 2于点M 、N ，连接MQ ，设点P 、Q 运动的时间为t 秒（t ＞0）． （1）点Q 在OC 上运动时，当t ＝_______________秒时，四边形CQMN 是平行四边形； （2）当t ＝_______________秒时，MQ ∥OB ．
2018年全国各地中考数学选择、填空压轴题汇编(四)
2018年全国各地中考数学选择、填空压轴题汇编（四） 参考答案与试题解析 一?选择题（共18小题） 1. （2018?杭州）如图，已知点P是矩形ABCD内一点（不含边界），设/ PAD=0i, / PBA=0 2,Z PCB=0 3,Z PDC=0 4,若/ APB=8C°，/ CPD=50，贝9（） A .( 0i+M) — (伦+依)=30°B.(他+M) — ( 0i+釘=40 C. ( 0i+ E2)-( (3+ (4) =70° D. ( 0i+ E2) + ( (3+(4) =180 解：??? AD // BC，Z APB=80， ???/ CBP=Z APB -Z DAP=80 -(， ABC( 2+80 —(， 又???△ CDP 中，Z DCP=180 —Z CPD—Z CDP=130 —(， ???Z BCD( 3+130°—(， 又???矩形ABCD 中，Z ABC + Z BCD=180， ?- (+800— (+(+130°- (=180° 即((+() — ( (+() =30°, 故选：A.
2.（2018?宁波）如图，在△ ABC 中，Z ACB=90，Z A=30°，AB=4，以点B 为
圆心，BC 长为半径画弧，交边AB 于点D ，贝A 匚的长为（ ） ???/ B=60° , BC=2 故选：C . （2018?嘉兴）如图，点C 在反比例函数y± （x >0）的图象上，过点C 的直 A ，B ,且AB=BC ，△ AOB 的面积为1,贝U k 的值为 B. 2 C . 3 D . 4 解：设点A 的坐标为（a ，0）， ???过点C 的直线与x 轴，y 轴分别交于点A, B , 且AB=BC ，△ AOB 的面积为1, k ???点 C （-a , —）， ???点B 的坐标为（0, “二） 解得，k=4, 故选：D . X2 27T 180 = _ 5 ???「的长为 B . y 解：???/ ACB=90 , AB=4，/ A=30° , D 'J n 3. 线与x 轴，y 轴分别交于点 A .吉n A . 1
中考数学专题汇总试卷填空题难题
中考选填空题 难题汇总 1.如图,矩形ABCD 沿着直线BD 折叠,使点C 落在C 1处,BC 1交AD 于点E,AD=10,AB=5，则DE 的长为 ． 2.如右图,正方形纸片ABCD 的边长为3,点E,F 分别在边BC,CD 上,将AB,AD 分别沿AE,AF 折叠,点B,D 恰好都落在点G 处.已知BE=1,则EF 的长为 . 3.如图,AB=4,射线BM 和AB 互相垂直,点D 是线段AB 上的一个动点,点E 在射线BM 上,DB BE 2 1=,作EF ⊥DE 并截取EF=DE,连结AF 并延长交射线BM 于点C.设x BE =,y BC =,则y 关于x 的函数解析式是 4.如图,现有两个边长为1:2的正方形ABCD 和A /B /C /D /，已知点B 、C 、B /、C /在同一条直线上，通过截割、 平移、旋转的方法，拼出两个相似比为1:3的三角形. (1)求=''''D C B A ABCD S S 正方形正方形 ； (2)借助原图拼图，并简要说明过程: 5.有5个相同的小正方形组成的十字形纸片,现需要将该纸片剪拼成一个与它面积相等的大正方形的纸片,如果限定裁剪线为两条,能否做到 （填能或不能）若能:请确定裁剪线的位置;若不能:请简要说明 理由.
6.如图,△ABC 绕点A 顺时针旋转450得到△C B A ''若∠BAC=900,AB=AC=2,则图中阴影部分的面积等于 . 7.如图,若双曲线x k y = 与边长为5的等边△AOB 的边OA 、AB 分别相交于C 、D 两点,且OC=3BD,则实数k 的值为______ 8.如图,在扇形OAB 中,∠AOB=1100,半径OA=18,将扇形OAB 沿着过点B 的直线折叠,点O 恰好落在?AB 上的 点D 处,折痕交OA 于点C,则?AD 的长等于 9.如图,Rt △ABC 中,∠C=900,∠ABC=300 ，AB=6.点D 在AB 边上, (1)若D 为AB 三等分点，则CD= ； (2)点E 是BC 边上一点（不与点B 、C 重合），若DA=DE,则AD 的取值范围是___________________． 10.小敏在数学课外小组活动中遇到这样一个问题： 如果α，β都为锐角，且1tan 2α=，1tan 3 β=，求αβ+的度数． 小敏是这样解决问题的： 如图1,把α,β放在正方形网格中,使得ABD α∠=,CBE β∠=,且BA ，BC 在直线BD 的两侧,连接AC,可证得△ABC 是等腰直角三角形,因此可求得αβ+=∠ABC = °. 请参考小敏思考问题的方法解决问题： 如果α，β都为锐角,当tan 4α=，3tan 5 β= 时，在图2的正方形网格中，利用已作出的锐角α,画出∠MON=αβ-，由此可得αβ-=______°.
江苏省中考数学几何填空题精选48题
2008年江苏省中考数学几何填空题精选48题 1（08年江苏常州）3.如图,在△ABC 中BE 平分∠ABC,DE ∥BC,∠ABE=35°, 则∠DEB=______°,∠ADE=_______°. 2（08年江苏常州）5.已知扇形的半径为3cm,扇形的弧长为πcm,则该扇形的面积是______cm 2 ,扇形的圆心角为______°. 3（08年江苏常州）8.若将棱长为2的正方体切成8个棱长为1的小正方体,则所有小 正方体的表面积的和是原正方体表面积的_______倍; 若将棱长为3的正方体切成27个棱长为1的小正方体,则所有小正方体的表面积的和是原正方体表面积的_______倍; 若将棱长为n(n>1,且为整数)的正方体 切成n 3 个棱长为1的小正方体,则所有小正方体的表面积的和是原正方体表面积的_______倍. 4（08年江苏淮安）12．已知⊙O 1与⊙O 2的半径分别为2cm 和3cm ，当⊙O 1与⊙O 2外切时，圆心距O 1O 2=______ 5（08年江苏淮安）13．如图，请填写一个适当的条件：___________,使得DE ∥ AB. 6（08年江苏连云港）11．在Rt ABC △中，90C ∠=，5AC =，4BC =，则tan A = 4 5 ． 7（08年江苏连云港）14．如图，一落地晾衣架两撑杆的公共点为O ，75OA =cm ，50OD =cm ．若撑杆下端点A B ，所在直线平行于上端点C D ，所在直线，且90AB =cm ，则CD = cm ．60 8（08年江苏连云港）15．如图，扇形彩色纸的半径为45cm ，圆心角为40，用它制作一个圆锥形火炬模型的侧面（接头忽略不计），则这个圆锥的高约为 44.7 cm ．（结果精确到0.1cm ．参考数据：2 1.414≈， 3 1.732≈，5 2.236≈，π 3.142≈） 9（08年江苏南京）13．已知1O 和2O 的半径分别为3cm 和5cm ，且它们内切，则圆心距12O O 等于 cm ．2 _4 （第14题图） 40 （第15题图） S B A 45cm (第3题）A B C D E
中考数学填空题压轴题精选
A C B H E F P G 2017年中考压轴填空题精编 2301．如图，在△ABC 中，∠ACB ＝90°，AC ＝BC ＝1，E 、F 为线段AB 上两动点，且∠ECF ＝45°，过点E 、F 分别作AC 、BC 的垂线相交于点P ，垂足分别为G 、H ，则PG ·PH 的值为___________． 2302．已知抛物线C 1：y ＝ax 2 ＋bx ＋c 的顶点为P ，与x 轴交于A 、B 两点（点A 在点B 左侧），点P 关于 x 轴的对称点为Q ，抛物线C 2的顶点为A ，且过点Q ，对称轴与y 轴平行，若抛物线C 2的解析式为y ＝x 2 ＋2x ＋1，直线y ＝2x ＋m 经过A 、Q 两点，则抛物线C 1的解析式为______________． 2303．有四张正面分别标有数字－3，0，1，5的不透明卡片，它们除数字不同外其余全部相同，现将它们 背面朝上，洗匀后从中任取一张，将该卡片上的数字记为a ，则使关于x 的分式方程 1－ax x －2 ＋2＝ 1 2－x 有正整数解的概率为____________． 2304．如图，点A 在抛物线y ＝x 2 －3x 的对称轴上，点B 在抛物线上，若AB 的最小值为2，则点A 的坐 标为____________． 2305．如图，在四边形ABCD 中，∠ABC ＝120°，∠ADC ＝90°，AB ＝2，BC ＝4，BD 平分∠ABC ，则AD ＝____________． D A C
A B C P D 2306．已知直线y ＝ 1 2 x －1与双曲线y ＝ 2 x 的一个交点坐标为（a ，b ）（a ＜0），则 1 a ＋ 1 2b 的值为____________． 2307．已知直线y ＝kx ＋4与y 轴交于点A ，与双曲线y ＝ 5 x 相交于B 、C 两点，若AB ＝5AC ，则k 的值为_____________． 2308．已知二次函数y ＝－( x －m )2＋m 2 ＋1，当－2≤x ≤1时有最大值4，则m 的值为___________． 2309．如图，在△ABC 中，AB ＝AC ＝5，BC ＝6，点P 是BC 边上一动点，且∠APD ＝∠B ，射线PD 交AC 于D ．若以A 为圆心，以AD 为半径的圆与BC 相切，则BP 的长是___________． 2310．将一副三角板按如图所示放置，∠BAC ＝∠BDC ＝90°，∠ABC ＝60°，∠DBC ＝45°，AB ＝2，连接AD ，则AD ＝____________． 2311．已知当0＜x ＜ 7 2 时，二次函数y ＝x 2 －4x ＋3－t 的图象与x 轴有公共点，则t 的取值范围是______________． A D B C
精品 中考数学填空题选择题难题 题集
初中数学填空题精选 1．如图，已知△ABC 中，AB=5，AC=3，则BC 边上的中线AD 的取值范围是________________． 2．如图，已知抛物线y =x 2+bx+c 经过点（0,-3），请你确定一个b 的值，使该抛物线与x 轴的一个交点 在（1,0）和（3,0）之间，你所确定的b 的值是_________． 3．如图，△ABC 中，∠C=900 ，点O 在边BC 上，以O 为圆心，OC 为半径的圆交边AB 于点D 、E ，交边BC 于点F ，若D 、E 三等分AB ，AC=2，则⊙O 的半径为__________． 4.半径分别为10和17的两圆相交，公共弦长为16，则两圆的圆心距为__________． 5.已知方程( 2013x )2-2012·2014x-1=0的较大根为a ，方程x 2＋2013x-2014=0的较小根为b ，则a-b=______． 6.从甲地到乙地有A 1、A 2两条路线，从乙地到丙地有B 1、B 2、B 3三条路线，从丙地到丁地有C 1、C 2两条 路线．一个人任意选了一条从甲地到丁地的路线，他恰好选到B 2路线的概率是_________． 7.如图，在半径为4，圆心角为90°的扇形OAB 的AB ︵ 上有一动点P ，过P 作PH ⊥OA 于H ．设△OPH 的 内心为I ，当点P 在AB ︵ 上从点A 运动到点B 时，内心I 所经过的路径长为___________． 8.在平面直角坐标系中，已知点P 1的坐标为（1，0），将其绕原点按逆时针方向旋转30°得到点P 2，延 长OP 2到点P 3，使OP 3=2OP 2，再将点P 3绕原点按逆时针方向旋转30°得到P 4，延长OP 4到点P 5，使OP 5=2OP 4， 如此继续下去，则点P 2014的坐标是_____________． 9.木工师傅可以用角尺测量并计算出圆的半径r ．如图，用角尺的较短边紧靠⊙O ，并使较长边与⊙O 相 切于点C ．假设角尺的较长边足够长，角尺的顶点为B ，较短边AB=8cm ．若读得BC 长为acm ，则用含a 的代数式表示r 为_____________． 10.已知A （-3，0），B （0，-4），P 为反比例函数y= 12 x （x ＞0）图象上的动点，PC ⊥x 轴于C ，PD ⊥y 轴于D ，则四边形ABCD 面积的最小值为___________．