一 : 72西航港一中2014-2015学年(下期)半期数学考试题
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? _?__?__?_____??____??___名??姓 ?? 线 ? ? ? ? ? ? ? ? ? 号?考? ? ? 订 ? ? ? ? ?级?班? ? ? ? ? ? ? ? ? 装 ? ? ? 室?考?????????
西航港一中2013-2014学年(下期)半期考试题
5.下列从左边到右边的变形,是因式分解的是:( )
A.?a?3??a?3??a2
?9 B.x2?x?5?x数 学
?x?1??5
八 年 级
C.x2?1?x??
x?
1?说明:(1)本试卷分A、B卷,满分150分,其中A卷100分,B卷50分。 ?x??
D.x2
?4x?4??x?2?2 6、在联欢晚会上,有A、B、C三名同学站在一个三角形的三个顶点位
A
卷(100分)
置上,他们在玩抢凳子游戏,要求在他们中间放一个木凳,谁先抢到凳子谁获一.选择题(每小题3分,共30分)
胜,为使游戏公平,则凳子应放的最适当的位置是在△ABC的( ) A、三边中线的交点 B、三条角平分线的交点 请把正确答案的序号填写在相应题号的栏目内,填在其它地方不给分。
C、三边上高的交点 D、三边中垂线的交点
7、2011江西7.如图,在下列条件中,不能证明△ABD≌△ACD的是( ) ). A.BD=DC, AB=AC B.∠ADB=∠ADC,BD=DC C.∠B=∠C,∠BAD=∠CAD D. ∠B=∠C,BD=DC
8.如果不等式3x?2?2x?m的解集是x?3,则m的取值范围是( ) 一、选择题:(每小题3分,共30分) A.m?1 B.m?1 C.m?1 D.m?1
1.不等式x?3?0的解集是( )
9.已知一次函数y=kx+b的图像,如图所示,当y?0时,
第7题
A.x?3 B.x??3 C.x?3 D.x??3 2.多项式x2
?xy分解因式的结果是( ) x的取值范围是( ?)
A.x?0 B.x?0 C.x?1 D.x?1
A.x(x?y)
B.x(1?y)
C.x(y?x)
D.x(x?1)
10.下列各式中,能用完全平方公式分解因式的是( ).
3、下列中,既是轴对称图形又是中心对称图形的有( )
A. 4个 B. 3个
C. 2个
D. 1个
A.4x2-4x+1 B.4x2+4x-1 C.x2-xy+y2 D.x2
-x12
二、填空题(每小题4分,共16分)
11.不等式2x?2?4的正整数解是
?2x?1
4.不等式组?
?
x?2?0的解集在数轴上表示为
12、分解因式是 13、如图,在一个长、宽、高分别为4㎝、3
㎝、12㎝的长方体盒子中,有一K( )
根长为20㎝的木棒置入其中,则木棒留在外面的长度最少为
14若点P(a,4?a)是第二象限的点,则a必须满足
F
G
三、解下列各题(每小题6分,共18分) 15.⑴.分解因式: x2
?a?b??4?b?a?
(2)给出三个多项式X =2a2
+3ab+b2
,Y =3a2
+3ab,Z = a2
+ab,请你任选两个进行加(或减)法运算,再将结果分解因式.
?2x?5?3?x?(3).解不等式组?
2???
x?1x ?2
?并把解集表示在数轴上.
3
四、做图题
16.(本题9分)△ABC在平面直角坐标系xOy中的位置如图所示. (1)作△ABC关于点C成中心对称的△A1B1C1;
(2)将△A1B1C1绕点顶点坐标A1顺时针方向旋转90°后得到的△A2B2C,作出△A2B2C2; (3)写出△A2B2C2的三个顶点坐标。
五、证明题(共8分)
17题如图19,在?ABC中,?C?900,AC=BC,AD平分?CAB交BC于点D,DE⊥AB于点E,若AB=6cm. 你能否求出?BDE的周长?若能,请求出;若不能,请说明理由.
五、解下列各题(18题9分,19题10分,共19分)
18、(2012肇庆)如图5,已知AC⊥BC,BD⊥AD,AC 与BD 交于O,AC=BD. 求证:(1)BC=AD;
D
(2)△OAB是等腰三角形.
C
A
B
图
5
(19)本题10分)某食品厂生产一种巧克力糖每千克成本为24元,其销售方案有如下两种:
方案一:若直接给本厂设在武汉的门市部销售,则每千克售价为32元,但门市部每月需
上缴有关费用2400元;
方案二:若直接批发给本地超市销售,则出厂价为每千克28元.
若每月只能按一种方案销售,且每种方案都能按月销售完当月产品,设该厂每月的销售量为x千克.
(1)求方案一和方案二的利润Y1和Y2与X的函数关系式。
(2)你若是厂长,如何选择销售方案,可使工厂当月所获利润更大?(分三种情况讨论) (3)厂长看到会计送来的第一季度销售量与利润关系的报表后(下表),发现该表填写
的销售量与实际有不符之处,请找出不符之处,并计算第一季度的实际销量总量.
B卷(共50分)
一、填空题(每小题4分,共20分)
20.如图,在△ABC中,∠CAB=70°.在同一平面内,将△ABC绕点A旋转到△AB′C′的位置,使得CC′∥AB,则∠BAB′=______.
?21、不等式组?1
?3x?1?2m
的解集是x < 6m + 3 ,则m的取值范围是 ??2x?m?0
_________.
22.2.在等腰三角形ABC中,AB=AC=5,BC=6,D是BC上一点,作DE⊥AB,DF⊥AC,则DE+DF= .
23、某种肥皂原零售价每块2元,凡购买2块以上(包括2块),商场推出两种优惠销售办
法.第一种:一块肥皂按原价,其余按原价的七折销售;第二种:全部按原价的八折销售.你在购买相同数量肥皂的情况下,要使第一种方法比第二种方法得到的优惠多,最少需要买( )块肥皂.
24.如图,矩形ABCD中,AB=12,AD=10,将此矩形折叠,使点B落在AD边的中点E处,则折痕FG的长为__________.
A
F
E
B
C
D
第20题 第22题
第24题 第
25题.题图,?ABC中,?BAC=120?,以BC为边向外作等边?BCD,把?ABD绕着点D按 顺时针方向向旋转60?得到?ECD的位置。若AB=3,AC=2,求?BAD的度数和线段AD的长度。(A、C、E在同一直线上)(共9分)
26题.已知在△ABC中,AC=BC,∠ACB=90°,点D是AB的中点,点E是AB边上一点. (1)直线BF垂直于直线CE于点F,交CD于点G(如图①),求证:AE=CG; (2)直线AH垂直于直线CE,垂足为点 H,交CD的延长线于点M(如图②),找出图中与BE相等的线段,并证明.(共10分)
第24题图
四、(共11分)
28.一手机经销商计划购进某品牌的A型、B型、C型三款手机共60部,每款手机至
少要购进8部,且恰好用完购机款61000元.设购进A型手机x部,B型手机y部.三款手机的进价和预售价如下表:
⑴.用含x,y的式子表示购进C型手机的部数; ⑵.求出y与x之间的函数关系式;
⑶.假设所购进手机全部售出,综合考虑各种因素,该手机经销商在购销这批手机过程
中需另外支出各种费用共1500元.
①求出预估利润P(元)与x(部)的函数关系式;(注:预估利润P=预售总额-购机款-各种费用)
②求出预估利润的最大值,并写出此时购进三款手机各多少部.
二 : 2014-2015学年59中初三年级期中考试单选及二卷【青岛开发区
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1.---Linda, do Chinese people celebrate ________Easter Day?
----No. This is the first time I have celebrated ______festival.
A. the; the B. the; a C. /; the D. /; a
2. ---How do you study ____a test?
--- I study ______working ____a group.
A. for, by, with B. for, by, at C. for, in, with D. of, in, by
3. He _____listen to pop music, but now he ______dancing.
A. is used to, used to B. used to, is used to C. used to, is used for D. used to, used to
4. ---I don’t believe the toy is made _____hand. The patterns are really fine.
---- I don’t believe it, either. But no machine is used during the whole process.
A. for B. with C. by D. in
5. If our government ______attention to controlling food safety now, our health ____in danger.
A. won’t pay, is B. doesn’t pay; is C. won’t pay, will be D. doesn’t pay, will be
6. In our school library there ___a very small number of books on science, and in these years the number of them _____growing larger and larger.
A. are, is B. is, are C. have, are D. have, is
7. ---Would you like to watch Transformer 4 in the IMAX theatre with me?
----I’d love to, ____I have watched it twice. The movie is really a treat to eyes.
A. if B. since C. because D. even though
8. I don’t think it is good for young people to ___too much time ___online.
A. spend, chatting B. take, chatting C. spend, to chat D. take, to chat
9. We can’t work out the physics problem. Can you tell us ____?
A. how to do B. what to do it C. how to do it D. what should we do
10. He decides __________his life and promises _______a better person.
A. to change, to be B. changing, being C. changing, to be D. to change, being
11. --–Will we have dinner at the Hope Restaurant?
---- We’ll go there if the show ___ before 6. but I don’t know if there __ any free tables then.
A. will end, are B. will end, will be C. ends, are D. ends, will be
12. The poor girl’s parents ____last year. Since then she _____her grandparents’ home.
A. were died, have lived in B. were dead, had come to C. died, has come to D. died, has lived in
13. He finds studying in groups ___to improve spoken English. Because they often waste time talking in Chinese instead of in English in the end.
A. interesting B. scared C. helpful D. useless
14. Meimei emailed to me and said she would live in London for ___four or five years.
A. other B. the other C. another D. the others
15. ---Excuse me. Could you tell me ____?
--- Certainly. Go straight ahead and you will see it on your right.
A. where the post office is B. where was the post office C. where is the post office
16. ---An iPad is really a great thing.
----- I agree. However, ____. Using iPads too much has a bad influence on us.
A. every dog has its day B. the grass is always greener on the other side
C. no pains, no gains D. every coin has two sides.
17. When you meet some new words, you can _________in your dictionary.
A. look it up B. look up it C. look them up D. look up them
18. I don’t find ___possible to learn a foreign language without much memory work.
A. this B. that C. which D. it
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19. ---I feel stressed from time to time. Could you give me some advice?
---- _________sharing your worries with your parents.
A. Why don’t you B. How about C. Why not D. Would you like
20. Jenny is practicing the piano. ______she is playing!
A. How careful B. How carefully C. What careful D. What carefully
21. In China, people _______say ―toilet‖ or ―washroom‖ instead of ―restroom‖.
A. normally B. especially C. specially D. politely
22. ---Who will take part in the contest?
--- ________
---I asked who would take part in the contest.
A. Excuse me B. Pardon C. Sorry D. Why not
23. The girl doesn’t have a partner to ______
A. practice English B. practice English in C. practice English with D. practice English on
24. Not only ____of the movie, but they have already seen it.
A. they have heard B. have they heard C. they heard D. did they hear
25. ---What do you think of my shirt? It _____cotton.
----- It looks nice on you.
A. is made in B. is made up of C. is made of D. is made into
1. Father’s Day __________on the 3 Sunday in June.
2. He is looking forward to ________more about the accident.
3. Our English teacher thinks _____is important when we learn English grammar.
4. On Mid-autumn night, my mom often ________some mooncakes, and fruits in the garden.
5. We have learned so many new words today, boys and girls. Please remember_them after class.
6. Tea ________in many different areas in China.
7. Why don’t you join an English club _______speaking English?
South Korean actor Kim Soo-hyun’s popularity has swept(横扫) _____Asia. He is ______so popular because of the role he played in the popular TV drama My love from the Star. In the drama, Kim plays a 400-year-old alien and ends up ____in love with a modern-day actress.
This is not the first success for the young star. Since he ______a professional actor seven years ago, Kim _____more than 20 prizes for acting. Kim’s serious attitude(态度) towards acting brings ____great success. A director once said that the dramas with Kim in were all popular. It is because ―he always studies the story very ________before acting out the character.‖ As you can see, attitude is everything. Your success ___________your attitude.
任务阅读
Baseball—it’s just a word, but for millions of Americans, ① after-noons…
For many people, baseball is the game of fathers and sons. Fathers and sons catch with each other on lawns (草坪) in the US. A father’s favorite team becomes his son’s. Grandfathers talk to their grandsons about games played long ago.
Many American kids collect baseball cards. The cards have pictures of their favorite players on them. In school, friends exchange baseball cards. ② ③Baseball players are known as ―the boys of summer‖ because the sport is most often played in summer. You don’t need to be of a certain size or shape to play baseball. You don’t have to be tall like a basketball player or strong like an American footballer. You just need to want to have fun.
Baseball is not as fast-paced a game as basketball. When you go to see a game, there’s time to relax, talk and get 青岛开发区官厅市场附近
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to know other people.
Baseball may not be the most popular sport in the US, but it is the most traditional. It’s not just a game any more, but an important part of American culture, like apple pie and grandma’s house.
1. 将①句子改成被动语态 (2分) _____________________________________
2. 将②排序(2分) ________________________________________________
3. 将③译成汉语(2分)__________________________________________________
4. To play baseball, you need to be very strong or tall, don’t you? (1分)___________
5. Which game is faster, baseball or basketball? (1分)______________
任务阅读
When I was 5 years old, I went to the USA with my mom. I can still remember the first Halloween holiday I had in the USA.
On the morning of Halloween, we paid a visit to a pumpkin farm. Each of us brought a pumpkin to school with us. I used the pumpkin to make a lantern which had two triangle eyes and a scary mouth.
In the afternoon, we put on the Halloween costumes and went on parade in school. Some of the costumes were nice, but some of them looked scary. I chose to wear a suit of Superman’s clothes.
I did a lot of things that day, but the part I liked best was ―trick or treat‖ in the evening. was beating very fast. A lady came out, and I said carefully to her, ―Trick or treat.‖ My voice was very low, and even myself could hardly hear it. To my surprise, the lady was so kind to give me two candy bars, and I was so excited, thanked the lady and moved on. I couldn’t remember how many houses I visited, but I could remember how many candies I got—I got 91 pieces of candy that day, and I was so proud of myself.
What a happy Halloween I had! And I wish we could have a Halloween every month!
根据短文内容,完成句子(每空一词,1分)。
My First Halloween in America
Activities at Halloween
In the morning we visited a pumpkin farm and brought (1) ____ to school.
In the afternoon we went on parade in school in Halloween (2) ______ .
In the evening “Trick or treat” was my (3) ______part.
At last I got 91 pieces of candy. This made me feel (4)_ __of myself.
I wish there could have (5)________Halloweens a year!
6. 将画线部分译为汉语(1分) ______________________________________
7. 给短文起个题目(1分) _______________________________
作文: How I change (初中三年里的前后变化,包括外貌,兴趣爱好,行为习惯等)
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三 : 北京三帆中学2013-2014学年八年级度第二学期期中数学考试试卷 89
北京三帆中学2013-2014学年度第二学期期中考试试卷
初二 数学
班级_____ 姓名_____ 学号_____ 成绩_____
注意:(1)时间100分钟,满分100分; (2)请将答案填写在答题纸上。
一、选择题(每小题3分,共30分)
1. 下面四个图案,它们绕中心旋转一定的角度后,都能和原来的图案相互重合,其中有一个图案与其余三个图案旋转的角度不同,它是( ).
2. 下列长度的线段中,可以构成直角三角形的是( ).
A.7,24,25
B.13,16,17 C.17,21,21 D.
18,24,36 3. 下列给出的条件中,不能判定四边形ABCD是平行四边形的是( ). A.AB=CD,
AD=BC B.AD=BC,AD∥BC C.AB=CD, AD∥BC D.AB∥CD,∠A=∠C
4. 一次函数y?mx?m(m为常数且m≠0),若y随x增大而增大,则它的图象经过( ). A.第一、二、三象限 B.第一、二、四象限 C.第一、三、四象限 D.第二、三、四象限 5.已知一次函数y=kx+b的图象(如右图),当x<0时,y的取值 范围是( ).
A.y>0 B.y<0 C.?2<y<0 D.y<?2
6.从平行四边形的一个锐角顶点引另两条边的垂线,两垂线的夹角为135°,则此平行四边形的四个角依次是( ).
A. 45°,135°,45°,135° B. 50°,135°,50°,135° C. 45°,45°,135°,135° D. 以上都不对
7.如图,将平行四边形ABCD沿AE翻折,使点B恰好落在AD上的点F处,则下列结论不一定成....立的是( ). .A.AF=EF C.AE=AF
B.AB=EF D.AF=BE
B
第7题图
F
D
8. 如图,△DEF是由△ABC绕着某点旋转得到的,则这点的 坐标是( ).
A.(1, 1) B.(0, 1) C.(-1, 1)
D.(2, 0)
9. 如果三角形的两条边分别为4和6,那么连结该三角形三边中点所得三角形的周长可能是下列数据中的( ).
A.6 B.8
C.10 D.12
10.如右图,向放在水槽底部的烧杯注水(流量一定),注满烧杯后,继续注水,直至注满水槽,水槽中水面上升高度h与注水时间t之间的函数关系大致是下列图象中的( ).
第8题图
A
B
C
D
二、填空题(每小题3分,共24分) 11.函数y?
12. 如图,在四边形ABCD中,E是BC边的中点,连结DE并延长, 交AB的延长线于F点,AB=BF.添加一个条件,使四边形ABCD 是平行四边形.你认为可添加 .
第12题图
x的取值范围是_____________.
13. 已知直线y=kx+m 和直线y= -3x平行,且过点(1,-2), 则m=___________.
14. 在平行四边形中,一组邻边的长分别为8cm和6cm,一个锐角为60°, 则此平行四边形的面积为 .
班级_____ 姓名_____ 学号_____
15. 直角三角形纸片的两直角边长分别为3和4,现将△ABC如图那样折叠,使点A与点B重合,折
痕为DE,则AE的长为________.
第15
16. 已知A( 4,3 ) 、 B( 2,?1 ), 若点P为y轴上一点,则PA+PB的最小值为17. 已知A(0,2)、B (-1,0) 、C (2,1),若以A、B、C、D为顶点的四边形为平行四边形,则D点
坐标为 .
18.如图1,正六边形ABCDEF的面积为2,把它的各边延长一倍得到新正六边形A1BC(如11D1E1F1
图2),称为第一次扩展;把正六边形A1BC的各边延长一倍得到正六边形A2B2C2D2E2F2(如11D1E1F1图3),称为第二次扩展;则正六边形A2B2C2D2E2F2的面积为···,第n次扩展后,得到正六边形AnBnCnDnEnFn的面积为_______.
AB
2
图1
图2
图3
2
1
A1
2
.........
三、解答题 (第19、20题每题4分,第20~24题每题5分,共28分)
19. 如图,在□ABCD中,已知AD=8cm,AB=6cm, DE平分∠ADC交BC边于点E,求BE的长度.
20. 若y -2与x+2成正比例,且x=0时,y=6, (1)求出y与x之间的函数关系式;
(2)如果点P(m,3)在这个函数的图象上,求m的值.
21. 已知:如图,A、C是□DEBF的对角线EF所在直线上 的两点,且AE=CF.求证:四边形ABCD是平行四边形.
22. 已知:如图,在△ABC中,∠ACB=90°,∠A=30°,AB=4,
D是AB延长线上一点且∠CDB=45°, 求:DB与DC的长.
23. 如图,在平面直角坐标系xOy中,一次函数y?kx?b的图象与x轴交于点A(?3,0), 与y轴交于
4
点B,且与正比例函数y?x的图象的交点为C(m,4) .
3(1) 求一次函数y?kx?b的解析式;
4
(2) 根据图象,写出关于x的不等式x≥kx+b的解集.
3
(3) 若点D在第二象限,△DAB是以AB为直角边的 等腰直角三角形,写出点D的坐标.
24. (1) 如图,将△ABC绕顶点B按顺时针方向旋转60°,得到△DBE,连结AD、DC、CE,则△BCE
为 三角形;
(2) 在(1)的条件下,若∠DCB=30°.求证:DC2+BC2=AC2.
班级_____ 姓名_____ 学号_____
四、解答题(第25、26、27题每题6分,共18分) 25.已知:一次函数y?
1
x?3的图象与正比例函数y?kx的图象相交于点A(a ,1). 2
(1)求正比例函数y?kx的解析式;
(2)点P在坐标轴上(不与点O重合),若PA=OA,直接写出点P的坐标; (3)直线x?m与一次函数的图象交于点B
图象交于点C,若△ABC的面积记为S,求S函数关系式,写出自变量的取值范围 .
26. 如图, 已知□ABCD中, AD=a, E在AC的延长线上, 连接DE并延长DE到F,使得EF=DE,连接BF. (1) 判断BF与AC的位置关系,并证明;
(2) 若AC=2CE,?ADC=60°,AC⊥DC,求四边形ABFD的面积.
27.一列快车从甲地驶往乙地,一列慢车从乙地驶往甲地, 两车同时出发,设慢车行驶的时间为x(h),两车之间的 .....距离为y(km),图中的折线表示y与..
根据图象进行以下探究: 图象理解:(1)求快车的速度;
(2)求线段BC所表示的y与
yx之间的函数关系.
x之间的函数关系式,并写出自变量x的取值范围;
问题解决:(3)若第二列快车也从甲地出发驶往乙地,速度与第一列快车相同.在第一列快车与
慢车相遇30分钟后,第二列快车与慢车相遇.求第二列快车比第一列快车晚出发多少小时?
北京三帆中学2013-2014学年八年级度第二学期期中数学考试试卷 89_北京三帆中学
附加题:(每题5分,共10分) 1.阅读下面材料:
小明遇到这样一个问题:如图1,在边长为m(m?3)的正方形ABCD各边上分别截取AE=BF=CG=DH
AFQ=∠BGM=∠CHN=∠DEP=45°时,求正方形MNPQ的面积。
A
图1
小明发现:分别延长QE,MF,NG,PH,交FA,GB,HC,ED的延长线于点R,S,T,W,可得△RQF,△SMG,△TNH
,△WPE是四个全等的等腰直角三角形(如图2) 请回答:
(1)若将上述四个等腰直角三角形拼成一个新的正方形(无缝隙,不重叠),则这个新的正方形
的边长为__________;正方形MNPQ的面积为____________. 参考小明思考问题的方法,解决问题:
(2)如图3,在等边△ABC各边上分别截取AD=BE=CF,再分别过点D,E,F作BC,AC,AB
的垂线,得到等边△RPQ,若S?RPQ?
2. 求证: 平行四边形两条对角线的平方和等于四条边的平方和.
初二数学试卷第6页(共6页)
,则AD的长为__________. 图3
B
初二数学试卷第7页(共6页)
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