2013-2014学年度第二学期期末考试试题

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2013----2014学年度下学期期末试题集锦

2013----2014学年度下学期期末试题集锦
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30、如图,∠MON=90°,点 A、B 分别在射线 OM、ON 上移动,BD 是∠NBA 的平分线,BD 的反向延
长线与∠BAO 的平分线相交于点 C. 试猜想:∠ACB 的大小是否随 A、B 的移动发生变化?如果保持不变,请给出证明;如果随点 A、B
的移动发生变化,请给出变化范围.
已知:如图,正方形 ABCD 中,E 为 BD 上一点,AE 的延长线交 CD 于点 F,交 BC 的延 长线于点 G,连结 EC。 (1)求证:△ECF∽△EGC; (2)若 EF= 2 ,FG= 8 ,求 AE 的长。
在 Rt△ABC中,. ∠C=90°,AC=20cm,BC=15cm. 现有动点P从点A出发, 沿AC向点C方向运动,动点Q从 点C出发, 沿线段CB也向点B方向运动. 如果点P的速度是4cm /秒, 点Q的速度是2cm /秒, 它们同时出发,当有 一点到达所在线段的端点时,就停止运动。设运动的时间为t秒 求:(1)用含t的代数式表示 Rt△CPQ的面积S; (2)当t=3秒时,这时,P、Q两点之间的距离是多少? (3)当t为多少秒时,以点C、P、Q为顶点的三角形与△ABC相似?
7.如图,等腰 Rt△ABC 的直角边 AB=2,点 P、Q 分别从 A、C 两点同时出发,以相同速 度作直线运动.已知点 P 沿线段 AB 运动,点 Q 沿边 BC 的延长线运动(当点 P 运动到 点 B 时两点即停止运动),PQ 与直线 AC 相交于点 D. (1)设 AP 的长为 x,△PCQ 的面积为 S.求出 S 关于 x 的函数关系式; (2)问是否存在 x 的值,使 S△PCQ=S△ABC ?若存在,请求出 x 的值;若不存在,说明理由. (3)作 PE⊥AC 于点 E,当点 P、Q 运动时,线段 DE 的长 度是否改变?证明你的结论.(本题 9 分)

2013-2014第二学期期末考试八年级语文试题

2013-2014第二学期期末考试八年级语文试题

沛县2013-2014学年度第二学期期末检测八年级语文试题(时间:120分钟;满分:140分)一、基础知识及运用(25分)1、下列词语加点的字全都正确的一项是(3分)A.畸(qī)形污秽(huì)迸(bèng)射如法炮(paào)制B.虐(nuè)待炽(zhì)热熹(xī)微长吁(xū)短叹C.家醅(pēi)挑剔(tī)褪(tuì)尽龙吟凤哕(huì)D.执拗(niù)酷肖(xiào)挑衅(xìn)笃(dǔ)信不疑2、下列词语书写全都正确的一项是(3分)A.诚皇诚恐逢场作戏碧海丹霞哑口无言B.相形见绌无尽暇思饶有兴趣若无其事C.盛气凌人看风使舵拖泥带水众目睽睽D.沾沾自喜顾名思义彻夜不寐人情炼达3、古诗文默写。

(10分)(1),悠然见南山。

(陶渊明《饮酒》)(2)长风破浪会有时,。

(李白《行路难》)(3)安得广厦千万间,。

(杜甫《茅屋为秋风所破歌》)(4)春蚕到死丝方尽,。

(李商隐《无题》)(5)剪不断,理还乱,是离愁,。

(李煜《相见欢》)(6),自缘身在最高层。

(王安石《登飞来峰》)(7)《白雪歌送武判官归京》中与李白的“孤帆远影碧空尽,唯见长江天际流”有异曲同工之妙的句子是,。

(8)《醉翁亭记》中描写山间朝暮之景的句子是,。

4、下列各句中没有语病的一项是(3分)A.由于长江流域连续干旱,导致洞庭湖潘阳鄱阳湖水面大面积缩小,给人们的生产生活带来很大影响。

B.有人认为,央视的“开心辞典”栏目将国学娱乐化,有利于更多人研究和了解国学。

C.5月,眉山市政府召开“实现伟大中国梦、建设富裕美好和谐眉山”主题教育活动。

D.在今年的全国两会上,许多代表指出;环境污染、交通拥堵、发展成本过高,已成为城市发展必须面对的重大课题。

5、下列关于课外阅读名著及文学常识的表述不正确的一项是(3分)A.凡尔纳的小说构思巧妙、情节惊险。

北京市门头沟区2013-2014学年八年级下学期期末考试数学试卷

北京市门头沟区2013-2014学年八年级下学期期末考试数学试卷

门头沟区2013—2014学年度第二学期期末测试试卷八 年 级 数 学一、选择题(本题共30分,每小题3分)下面各题均有四个选项,其中只有一个是符合题意的. 1.点A 的坐标是(2,8),则点A 在( ) A .第一象限B .第二象限C .第三象限D .第四象限2.一元二次方程4x 2+x =1的二次项系数、一次项系数、常数项分别是( ) A .4,0,1B .4,1,1C .4,1,-1D .4,1,03.内角和等于外角和的多边形是( ) A .三角形B .四边形C .五边形D .六边形4.将方程x 2+4x +2=0配方后,原方程变形为( ) A .(x +4)2=2B .(x +2)2=2C .(x +4)2=-3D .(x +2)2=-55.下列图形中,既是轴对称图形,又是中心对称图形的是( ) A .角B .等边三角形C .平行四边形D .矩形6.若关于x 的方程(m -2)x 2-2x +1=0有两个不等的实根,则m 的取值范围是( ) A .m <3B .m ≤3C .m <3且m ≠2D .m ≤3且m ≠27.已知点(-5,y 1),(2,y 2)都在直线y =-2x 上,那么y 1与y 2大小关系是( ) A .y 1≤y 2B .y 1≥y 2C .y 1<y 2D .y 1>y 28.直线y =-x -2不经过( ) A .第一象限B .第二象限C .第三象限D .第四象限9.在菱形ABCD 中,对角线AC 与BD 交于点O ,如果∠ABC =60°,AC =4,那么该菱形的面积是( ) A .B .16C .D .810.如图,在平面直角坐标系xOy 中,以点A (2,3)为顶点作一直角∠P AQ ,使其两边分别与x 轴、y 轴的正半轴交于点P ,Q .连接PQ , 过点A 作AH ⊥PQ 于点H .如果点P 的横坐标为x , AH 的长为y ,那么在下列图象中,能表示y 与x 的 函数关系的图象大致是( )A B C D二、填空题:(本题共32分,每小题4分)11.点P(-2,3)关于x轴对称的点的坐标是.12.在函数32yx=-中,自变量x的取值范围是.13.如图,A、B两点被池塘隔开,在AB外选一点C,连接AC和BC,并分别找出它们的中点M和N.如果测得MN=15m,则A,B两点间的距离为m.14.如图,在□ABCD中,CE⊥AB于E,如果∠A=125°,那么∠BCE= °.第13题图第14题图第15题图第16题图15.有两名学员小林和小明练习射击,第一轮10枪打完后两人打靶的环数如图所示,如果通常新手的成绩都不太稳定,那么根据图中所给的信息,估计小林和小明两人中新手是(填“小林”或“小明”).16.如图,在△ABC中,∠ACB=90°,D是AB的中点,DE∥BC交AC于E.如果AC=6,BC=8,那么DE= ,CD= .17.如图,在甲、乙两同学进行的400米跑步比赛中,路程s(米)与时间t(秒)之间函数关系的图象分别为折线OAB和线段OC,根据图象提供的信息回答以下问题:(1)在第秒时,其中的一位同学追上了另一位同学;(2)优胜者在比赛中所跑路程s(米)与时间t(秒)之间函数关系式是.第17题图第18题图18.如图,在平面直角坐标系xOy中,直线x=2和直线y=ax交于点A,过A作AB⊥x轴于点B.如果a取1,2,3,…,n(n为正整数)时,对应的△AOB的面积为S1,S2,S3,…,S n,那么S1=;S1+S2+S3+…+S n=.三、解答题:(本题共36分,每题6分)19.解方程:22830.x x-+=20.已知:如图,在正方形ABCD中,E是CD边上的一点,F为BC延长线上一点,且CE=CF.(1)求证:△BEC≌△DFC;(2)如果BC+DF=9,CF=3,求正方形ABCD的面积.21.某校数学兴趣小组的成员小华对本班上学期期末考试数学成绩(成绩取整数,满分为100分)作了统计分析,绘制成如下频数分布表和频数分布直方图.请你根据图表提供的信息,解答下列问题:(1)频数分布表中a= ,b= ;(2)补全频数分布直方图;(3)数学老师准备从不低于90分的学生中选1人介绍学习经验,那么取得了93分的小华被选上的概率是.22.已知:如图,在△ABC中,90⊥,CE∥AD.如ACB∠=︒,D是BC的中点,DE BC 果AC=2,CE=4.(1)求证:四边形ACED是平行四边形;(2)求四边形ACEB的周长;(3)直接写出CE和AD之间的距离.23.如图,在平面直角坐标系xOy中,正比例函数y=x的图象与一次函数y=kx-k的图象的交点坐标为A(m,2).(1)求m的值和一次函数的解析式;(2)设一次函数y=kx-k的图象与y轴交于点B,求△AOB的面积;(3)直接写出使函数y=kx-k的值大于函数y=x的值的自变量x的取值范围.24.列方程(组)解应用题:据媒体报道,2011年某市市民到郊区旅游总人数约500万人,2013年到郊区旅游总人数增长到约720万人.(1)求这两年该市市民到郊区旅游总人数的年平均增长率.(2)若该市到郊区旅游的总人数年平均增长率不变,请你预计2014年有多少市民到郊区旅游.四、解答题:(本题共22分,第25、26题,每小题7分,第27题8分)25.已知:关于x的方程mx2+(3m+1)x+3=0.(1)求证:不论m为任何实数,此方程总有实数根;(2)如果该方程有两个不同的整数根,且m为正整数,求m的值;(3)在(2)的条件下,令y=mx2+(3m+1)x+3,如果当x1=a与x2=a+n(n≠0)时有y1=y2,求代数式4a2+12an+5n2+16n+8的值.26.阅读下列材料:问题:如图1,在□ABCD中,E是AD上一点,AE=AB,∠EAB=60°,过点E作直线EF,在EF上取一点G,使得∠EGB=∠EAB,连接AG.求证:EG =AG+BG.小明同学的思路是:作∠GAH=∠EAB交GE于点H,构造全等三角形,经过推理使问题得到解决.参考小明同学的思路,探究并解决下列问题:(1)完成上面问题中的证明;(2)如果将原问题中的“∠EAB=60°”改为“∠EAB=90°”,原问题中的其它条件不变(如图2),请探究线段EG、AG、BG之间的数量关系,并证明你的结论.图1 图227.如图1,在平面直角坐标系xOy中,等腰直角△AOB的斜边OB在x上,顶点A的坐标为(3,3).(1)求直线OA的解析式;(2)如图2,如果点P是x轴正半轴上的一个动点,过点P作PC∥y轴,交直线OA 于点C,设点P的坐标为(m,0),以A、C、P、B为顶点的四边形面积为S,求S与m之间的函数关系式;(3)如图3,如果点D(2,a)在直线AB上. 过点O、D作直线OD,交直线PC于点E,在CE的右侧作矩形CGFE,其中CG=32,请你直接写出矩形CGFE与△AOB重叠部分为轴对称图形时m的取值范围.图1 图2 图3门头沟区2013—2014学年度第二学期期末测试试卷八年级数学参考答案及评分参考一、选择题(本题共30分,每小题3分)二、填空题(本题共32分,每小题4分)三、解答题(本题共36分,每题6分) 19.(1)22830.x x -+=解:2283x x -=- (1)分 2342x x -=- (2)分 234442x x -+=-+ (3)分 ()2522x -= (4)分2x -=∴12x =+,22x =-…………………………………………………6分 20.(1)证明:∵正方形ABCD ,∴BC =CD ,∠BCE =∠DCF =90°. 又∵CE =CF ,∴△BEC ≌△DFC (SAS ). ……………4分(2)解:设BC =x ,则CD =x ,DF =9-x ,在Rt △DCF 中,∵∠DCF =90°,CF =3, ∴CF 2+CD 2=DF 2.∴32+x 2=(9-x )2.…………………………………………………………5分 解得x =4.∴正方形ABCD 的面积为:4×4=16.……………………………………6分 21.解:(1)频数分布表中a =8,b =0.08;………………………………………………2分(2)略;……………………………………………………………………………4分(3)小华被选上的概率是14.……………………………………………………6分 22.(1)证明:∵∠ACB=90°,DE ⊥BC ,∴AC ∥DE . ……………………………1分又∵CE ∥AD ,∴四边形ACED 是平行四边形. ………2分(2)解:∵四边形ACED 的是平行四边形.∴DE=AC=2.在Rt △CDE 中,∵∠CDE =90°,由勾股定理3222=-=DE CE CD .……………………………………3分 ∵D 是BC 的中点, ∴BC=2CD=34.在Rt △ABC 中,∵∠ACB =90°,由勾股定理13222=+=BC AC AB .…………………………………4分 ∵D 是BC 的中点,DE ⊥BC , ∴EB=EC=4.∴四边形ACEB 的周长= AC+CE+EB+BA=10+132.…………………5分(3)解:CE 和AD 6分23.解:(1)∵点A (m ,2)正比例函数y =x 的图象上,∴m =2.……………………………………………1分 ∴点A 的坐标为(2,2).∵点A 在一次函数y =kx -k 的图象上, ∴2=2k -k ,∴k =2.∴一次函数y =kx -k 的解析式为y =2x -2.………………………………2分 (2)过点A 作AC ⊥y 轴于C .∵A (2,2), ∴AC =2. ……………………………………………………3分 ∵当x =0时,y =-2, ∴B (0,-2),∴OB =2. ……………………………………………………………………4分∴S △AOB =12×2×2=2. ……………………………………………………5分 (3)自变量x 的取值范围是x >2.…………………………………………6分 24.解:(1)设这两年市民到郊区旅游总人数的年平均增长率为x . …………………1分由题意,得 500(1+x )2=720. ………………………………………………3分 解得 x 1=0.2,x 2=-2.2 ∵增长率不能为负,∴只取x =0.2=20%.………………………………………………………4分 答:这两年市民到郊区旅游总人数的年平均增长率为20%.…………5分(2)∵720×1.2=864.∴预计2014年约有864万人市民到郊区旅游.…………………………6分四、解答题:(本题共22分,第27、28题,每小题7分,第29题8分)25.解:(1)当m=0时,原方程化为x+3=0,此时方程有实数根x=-3.…………1分当m≠0时,原方程为一元二次方程.∵△=(3m+1)2-12m=9m2-6m+1=(3m-1)2.∵m≠0,∴不论m为任何实数时总有(3m-1)2≥0.∴此时方程有两个实数根.………………………………………………2分综上,不论m为任何实数时,方程mx2+(3m+1)x+3=0总有实数根.(2)∵mx2+(3m+1)x+3=0.解得x1=-3,x2=1m-.………………………………………………3分∵方程mx2+(3m+1)x+3=0有两个不同的整数根,且m为正整数,∴m=1.………………………………………………………………………5分(3)∵m=1,y=mx2+(3m+1)x+3.∴y=x2+4x+3.又∵当x1=a与x2=a+n(n≠0)时有y1=y2,∴当x1=a时,y1=a2+4a+3,当x2=a+n时,y2=(a+n)2+4(a+n)+3.∴a2+4a+3=(a+n)2+4(a+n)+3.化简得2an+n2+4n=0.即n(2a+n+4)=0.又∵n≠0,∴2a=-n-4.…………………………………………………6分∴4a2+12an+5n2+16n+8=(2a)2+2a•6n+5n2+16n+8=(n+4)2+6n(-n-4)+5n2+16n+8=24.…………………………………7分26.解:(1)证明:如图,作∠GAH=∠EAB交GE于点H.∴∠GAB=∠HAE. ………………………………………………………1分∵∠EAB=∠EGB,∠APE=∠BPG,∴∠ABG=∠AEH. …………………………………………………………2分∵又AB=AE,∴△ABG≌△AEH. …………3分∴BG=EH,AG=AH.∵∠GAH=∠EAB=60°,∴△AGH是等边三角形.∴AG=HG.∴EG=AG+BG. ……………………………………………………………4分(2)线段EG、AG、BG之间的数量关系是.EG BG=-…………5分理由如下:如图,作∠GAH=∠EAB交GE的延长线于点H.∴∠GAB=∠HAE.∵∠EGB=∠EAB=90°,∴∠ABG+∠AEG=∠AEG+∠AEH =180°.∴∠ABG=∠AEH.∵又AB=AE,∴△ABG≌△AEH. ………………6分∴BG=EH,AG=AH.∵∠GAH=∠EAB=90°,∴△AGH是等腰直角三角形.=HG.∴.EG BG=-…………………………………………………………7分27.解:(1)设直线OA的解析式为y=kx.∵直线OA经过点A(3,3),∴3=3k,解得k=1.∴直线OA的解析式为y=x. ………………………………………………2分(2)过点A作AM⊥x轴于点M.∴M(3,0),B(6,0),P(m,0),C(m,m).当0<m<3时,如图1.S=S△AOB-S△COP=12AD·OB-12OP·PC=116322m m⨯⨯-⋅=2192m-.………………………………………………4分当3<m<6时,如图2. S=S△COB-S△AOP=12PC·OB-12OP·AD=116322m m⨯⨯-⋅=33322m m m-=.……………………………………5分当m>6时,如图3. S=S△COP-S△AOB=12PC·OP-12OB·AD=116322m m⋅-⨯⨯2192m=-.…………………………………………6分图1 图2 图3(3)m的取值范围是32m ,94≤m<3. ……………………………………8分说明:若考生的解法与给出的解法不同,正确者可参照评分参考相应给分,谢谢!。

安龙县2013—2014学年第二学期期末考试试卷(八年级数学)

安龙县2013—2014学年第二学期期末考试试卷(八年级数学)

2013—2014学年度第二学期学习水平测试试卷八 年 级 数 学一、选择题(每小题3分,共30分)1有意义的x 的取值范围是( )A 、13x >B 、13x >-C 、13x ≥D 、13x ≥-2 )A 、3B 、-3C 、±3D 、93、如图,在等腰梯形ABCD 中,AB ∥CD ,对角线AC 平分∠BAD ,∠B =60°,CD =2cm ,则梯形ABCD 的面积为( )cm ².A 、B 、6C 、D 、124、已知函数y kx b =+的图象如图,则2y kx b =+的图象可能是( )第4题 A B C D5、如图,在ABCD 中,AD =5,AB =3,AE 平分∠BAD 交BC 边于点E ,则线段BE 、EC 的长度分别为( )A 、2和3B 、3和2C 、4和1D 、1和46、如图,菱形ABCD 中,∠B =60°,AB =4,E 、F 分别是BC 、CD 的中点,连接AE 、EF 、AF ,则△AEF 的周长为( )A 、B 、C 、D 、6第3题 第5题 第6题7、已知一个直角三角形的两边长分别为5和4,则第三边长是( )A 、5B 、25CD 、38、下列命题中错误的是( )A 、平行四边形的对边相等B 、两组对边分别相等的四边形是平行四边形C 、矩形的对角线相等D 、对角线相等的四边形是矩形9、小高从家门口骑车去上班,先走平路到达点A ,再走上坡路到达点B ,最后走下坡路到达工作单位,所用时间与蹻的关系如图所示。

下班后,如果他沿原路返回,且走平路、上坡路、下坡路的速度分别保持和去上班时一致,那么他从单位到家门口需要的时间是( )A 、12分钟B 、15分钟C 、25分钟D 、27分钟10、一次函数1y kx b =+与2y x a =+的图象如图,则下列结论:①0k <;②0a >;③当3x <时,12y y <中,正确的个数是( )A 、0B 、1C 、2D 、3第9题 第10题二、填空题(每小题2分,共20分)11、函数y =中,自变量x 的取值范围是 ; 12、已知1234,,,x x x x 的标准差为3,则数据123441,41,41,41x x x x ++++的方差是 ;13、如图,一棵大树在一次强台风中于离地面3m 处折断倒下,树干顶部在根部4m 处,这棵大树在折断前的高度为 ; 第13题14、观察一下几组勾股数,并寻找规律:①3,4,5;②5,12,13;③7,24,25;④9,40,41;…请你写出有以上规律的第⑤组勾股数: ;15、直线28y x =+与x 轴和y 轴的交点的坐标分别是 、 ;16、对于任意不相等的两个数a ,b ,定义一种运算※如下:a ※b ,如3※2=32=-,那么12※4= ;17、若实数x ,y 满足3y =,则x y 的值是 ;18、一次函数(1)5y m x =++,y 值随x 增大而减小,则m 的取值范围是 ;19、如右图矩形纸片ABCD 中,AD =5,AB =10,按如图方式折叠,使点B 与点D 重合,折痕为EF ,则DE = ;20、如图,△ABC 是等腰直角三角形,BC 是斜边,将△ABP 绕点A 逆时针旋转后,能与△'ACP 重合,如果AP =3,那么'PP 的长等于 .第19题 第20题三、计算题(共50分)21、(5分)计算:()101152π-⎛⎫-+-+- ⎪⎝⎭22、(5分)先化简,再求值:232224x x x x x x ⎛⎫-÷ ⎪+--⎝⎭,其中4x =23、(12分)如图,在△ABC 中,D 是BC 边上的一点,E 是AD 的中点,过点A 作BC 的平行线交BE 的延长线于F ,且AF =DC ,连接CF .(1)求证:D 是BC 的中点;(6分)(2)如果AB =AC ,试猜测四边形ADCF 的形状,并证明你的结论.(6分)24、(8分)有一只乌鸦在一棵6m高的小树上觅食,它的巢筑在距该树24m的一棵大树上,大树高18m,且巢离树顶部2m,当它听到巢中幼鸟的叫声时,立即赶过去,若它飞行速度为5m/s,则它至少需要多少时间才能赶回巢中?25、(8分)在“不闯红灯,珍惜生命”活动中,文明中学的关欣和李好两位同学某天来到城区中心的十字路口,观察、统计上午7:00—12:00中闯红灯的人次.制作了如下的两个数据统计图.(1)求图(一)提供的五个数据(各时段闯红灯人次)的众数和平均数;(2)估计一个月(按30天计算)上午7:00—12:00在该十字路口闯红灯的未成年人约有人次;(3)请你根据统计图提供的信息向交通管理部门提出一条合理化建议。

2013-2014学年度第二学期期末考试(含答案)高 二 年 级 英 语 学 科 试 题

2013-2014学年度第二学期期末考试(含答案)高 二 年 级 英 语 学 科 试 题

2013-2014学年度第二学期期末考试(含答案)高二年级英语学科试题(考试时间:120分钟)本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。

满分150分,用时120分钟。

第I卷(选择题共115分)注意事项:1. 答题前, 考生在答题卡上务必用直径0.5 毫米黑色墨水签字笔将自己的姓名、准考证号填写清楚,并贴好条形码。

请认真核准条形码上的准考证号、姓名。

2. 每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

在试题卷上作答无效。

第一部分听力(共两节,满分30 分)第一节(共5小题;每小题1.5分, 满分7. 5 分)1.Why does the woman say no?A. Linda is waiting for themB. Linda is having lunch outsideC. Linda has had her lunch already2. How about the woman‟s house?A. Bigger than Allen‟sB. Bigger than Mary‟sC. Smaller than Mary‟s3. What does the woman mean?A. Going there by themselvesB. Asking someone for help in finding the wayC. Not parking the car according to the map4. What does the man mean?A. She should refuse to do him a favorB. Jason will not help her with her TVC. She should give Jason a hand5. What does the man want to do?A. He‟d like to stop for a breakB. He actually has no choice21世纪教育网C. He has to keep on with the job第二节(共15小题;每小题1.5分, 满分22. 5分)21世纪教育网6. When did Steve first plan to get back?A. Either on Friday evening or Sunday eveningB. Either on Friday morning or Sunday afternoonC. Either on Friday evening or Sunday morning7. What party is held on Saturday morning?A. Steve‟s birthday partyB. Paula‟s birthday partyC. The woman‟s birthday party8. When will Steve probably return at last?A. Surely on Friday morningB. Maybe on Friday eveningC. Of course on Friday evening9. What are the speakers talking about?A. A football game they saw the night beforeB. TV programs they saw the night beforeC. A film they have just seen10. What did the man probably do last night?A. He watched football gameB. He saw a filmC. He worked11. How much of the film did the woman see?A. Part of the filmB. The end of the filmC. The whole of the film12. What does the man take besides Morning Post?A. New YorkersB. N ewsweekC. New Scientist13. What‟s the price of Morning Post?A. Two dollars and fifty centsB. One dollarC. Three dollars and fifty14. What‟s New Yorkers?A. A magazineB. A pressC. A book15. Where does the conversation probably take place?A. On the streetB. At a camera shopC. At the woman‟s house16. Why can‟t the woman come over?A. She has a research projectB. She doesn‟t know the man‟s sister very wellC. She has to go to a graduation17. What can you learn from the conversation?A. The woman has the same interest as the man‟s sisterB. The woman shows no interest in what the man has told herC. The woman doesn‟t like to make friends with the man‟s sister18. What kind of house is Foulsham Houae?A. An old farm houseB. A large house for people to come to listen to its storyC. A hours with a history of nearly two hundred years19. Which of the following is true?A. The house has a room for four cars at the back of the houseB. There is a parking lot behind the houseC. The road behind the house is wide enough for 4 cars to go20. What can we infer according to the passage?A. Harvey wants some money to make the house meet today‟s needs21世纪教育网B. Harvey wants people to know the history of the houseC. Harvey wants to sell the house第二部分:英语知识应用(共两节,满分45分)第一节单项填空(共15小题;每小题1分,满分15分)从A,B,C.D四个选项中,选出可以填入空白处的最佳选项。

2013—2014学年第二学期八年级数学期末试题(含答案)

2013—2014学年第二学期八年级数学期末试题(含答案)

2013—2014学年度第二学期期末考试八年级数学试题(90分钟完成)一、选择题(每小题给出四个选项中只有一个是正确的,请把你认为正确的选项选出来,并将该选项的字母代号填入答题纸的相应表格中.) 1x 的取值范围是A.3x 2≥B. 3x 2>C. 2x 3≥ D. 2x 3>2.下列二次根式中,最简二次根式是3.下列命题的逆命题成立的是A .对顶角相等B .如果两个实数相等,那么它们的绝对值相等C .全等三角形的对应角相等D .两条直线平行,内错角相等4.如图,矩形ABCD 中,AB=3,AD=1,AB 在数轴上,若以点A 为圆心,对角线AC 的长为半径作弧交数轴的正半轴于M ,则点M 表示的实数为A . 2.5B .C.D.15.如果一个四边形的两条对角线互相垂直平分且相等,那么这个四边形是 A.平行四边形 B. 菱形 C.正方形 D. 矩形6.在平面直角坐标系中,将正比例函数y=kx (k >0)的图象向上平移一个单位,那么平移后的图象不经过A.第一象限B. 第二象限C.第三象限D. 第四象限 7.下列描述一次函数y=-2x+5图象性质错误的是A. y 随x 的增大而减小B. 直线经过第一、二、四象限C.直线从左到右是下降的D. 直线与x 轴交点坐标是(0,5)8.商场经理要了解哪种型号的洗衣机最畅销,在相关数据的统计量中,对商场经理来说最有意义的是A.平均数B.众数C.中位数D.方差9. 小华所在的九年级一班共有50名学生,一次体检测量了全班学生的身高,由此求得该班学生的平均身高是1.65米,而小华的身高是1.66米,下列说法错误的是 A .1.65米是该班学生身高的平均水平 B .班上比小华高的学生人数不会超过25人 C .这组身高数据的中位数不一定是1.65米D .这组身高数据的众数不一定是1.65米10.如图,已知ABCD的面积为48,E 为AB连接DE ,则△ODE 的面积为 A.8 B.6 C.4 D.3第4题图第10题图 B D二、填空题:11.在一次学校的演讲比赛中,从演讲内容、演讲能力、演讲效果三个方面按照5:3:2计算选手的最终演讲成绩。

2013-2014学年度第二学期期末考试(含答案)

2013-2014学年度第二学期期末考试(含答案)

2013-2014学年度第二学期期末考试(含答案)第Ⅰ卷选择题(共60分)(考试时间100分钟,满分120分,请将答案填写在答题卡上,否则不得分。

)注:H的原子量1,C的原子量12,O的原子量16一、选择题(本大题共20小题,每小题只有1个选项符合题意,每题3分,共60分)1.哥本哈根世界气候大会上,商讨了《京都议定书》一期承诺到期后的后续方案,即2012年至2020年的全球减排协议。

大会倡导“节能减排”和“低碳经济”。

下列做法不符合这一理念的是()A.推广利用CO2与环氧丙烷和琥珀酸酐的三元共聚物的生物降解材料B.使用填埋法处理未经分类的生活垃圾C.推广煤的干馏、气化、液化技术,提供清洁、高效燃料和基础化工原料D.发展水电,开发新能源,如核能、太阳能、风能等,减少对化石能源的依赖2.下列各化合物的命名中正确的是()A. CH2=CH-CH=CH2 1,3-二丁烯B. 3-丁醇C. 甲基苯酚D. 2-甲基丁烷3.下列有关高分子材料的表述不正确的是()A.合成高分子材料都很难降解B.塑料、合成纤维、黏合剂、涂料等都是合成高分子材料C.棉花、羊毛、天然橡胶等属于天然高分子材料D.线型和体型高分子材料在溶解性、热塑性和热固性等方面有较大的区别4.①丁烷②2—甲基丙烷③戊烷④2—甲基丁烷⑤2,2—二甲基丙烷,物质沸点的排列顺序正确的是()A.①>②>③>④>⑤B.⑤>④>③>②>①C.③>④>⑤>①>②D.②>①>⑤>④>③5.某有机化合物的结构简式如下:此有机化合物属于()①烯烃②多官能团有机化合物③芳香烃④烃的衍生物⑤高分子化合物A.①②③④B.②④C.②④⑤ D.①③⑤6.下列有关除去杂质(括号内物质)的操作中,错误的是()A.FeCl2(FeCl3):加入过量铁粉振荡,然后过滤B.苯(苯酚):加入NaOH溶液振荡,然后分液C.乙醛(乙酸):加入新制的生石灰,然后蒸馏D.乙酸乙酯(乙酸):加入乙醇和浓硫酸,然后加热7.下列化学式只表示一种纯净物的是()A.C3H8 B.C4H9Cl C.C2H4Cl2 D.C8.如图分别是A、B两种物质的核磁共振氢谱,已知A、B两种物质都是烃类,都含有6个氢原子,试根据两种物质的核磁共振氢谱推测A、B有可能是下面的()A.A是C3H6,B是C6H6 B.A是C2H6,B是C3H6C.A是C2H6,B是C6H6 D.A是C3H6,B是C2H69.最简式相同,但既不是同系物,又不是同分异构体的是()①辛烯和3-甲基-1-丁烯②苯和乙炔③1-氯丙烷和2—氯丙烷④甲基环己烷和乙烯A.①②B.②③C.③④D.②④10.下列表格中烷烃的一氯代物只有一种,仔细分析其结构和组成的变化规律,判断第4位烷烃的分子式是()A.C23H48 B.C33H68C.C43H88 D.C53H10811.下列关于有机物的说法中不正确的是()A.所有的碳原子在同一个平面上B.水解生成的有机物可与NaOH溶液反应C.不能发生消去反应D.能够发生加成反应12.卤代烃RCH2CH2X分子中的化学键如图所示,则下列说法正确的是()A.当该卤代烃发生水解反应时,被破坏的键是①和③B.当该卤代烃发生水解反应时,被破坏的键是①C.当该卤代烃发生消去反应时,被破坏的键是①和④D.当该卤代烃发生消去反应时,被破坏的键是①和②13.能在有机物的分子中引入羟基的反应类型有:①酯化反应;②取代反应;③消去反应;④加成反应;⑤水解反应;⑥还原反应。

2013-2014学年度高一第二学期期末考数学试题

2013-2014学年度高一第二学期期末考数学试题

2013-2014学年第二学期高一期末考试题数 学(2014年7月)考试时间:120分钟,满分150分.一、选择题: 本大题共10小题,每小题5分,满分50分.1.设集合{}220,S x x x x R =+=∈,{}220,T x x x x R =-=∈,则S T ⋂=( ). A.{}0 B.{}0,2 C. {}0,2- D. {}0,2,2- 2.函数()lg 1()2x f x x +=-的定义域是( ). A .()1,-+∞ B .[)1,-+∞ C .()1,2-D .()()1,22,-⋃+∞3.sin 600︒的值为( ).A .12 B .- C .12- D4. 在ABC ∆中,已知a =b =6A π=,则角B 的大小为( ).A.3π B.4π C.3π或23πD.6π或56π5. 在数列{}n a 中,若12a =,11,n n a a n N *+=-∈,则该数列的通项公式是( ). A .21n + B .1n + C .1n - D .3n -6. 等比数列4,2-,1,,第三项到第七项的和为( ).A .4716 B .12916 C .1132D .1116 7. 设l 为直线,α、β为两个不同平面,则下列命题正确的是( ).A .若//l α,//l β,则//αβB .若l α⊥,l β⊥,则//αβC .若l α⊥,//l β,则//αβD .若αβ⊥,//l α,则l β⊥8. 某四面体的三视图如图所示,该四面体四个面的面积中最大的是( ).正视图侧视图俯视图A .8 B. C .10 D . 9.圆2240x y x +-=在点(P 处的切线方程为(). A .20x -=B .40x -=C .40x +=D .20x +=10.如右图所示,正方形ABCD 边长为3,点E 在CD 上,点F 在BC 上,且2DE EC =,2CF FB =,则AE AF 的值为( ).A .9B .10C .11D .12二、填空题:本大题共4小题,每小题5分,满分20分.11. 已知函数()()()1f x x x a =++是偶函数,则a = .12.已知某圆柱底面周长是2π,高是3,则它的侧面积是 ,体积是 . 13. 已知向量a 与向量b 的夹角是60,6a =,4b =,则向量b 在向量a 上的投影是_____________.14. 函数()lg 1f x x =-的单调递减区间是 .三、解答题:本大题共6小题,满分80分. 解答须写出文字说明、证明过程和演算步骤. 15.(本小题满分12分) 已知函数()2sin 12f x x π⎛⎫=-⎪⎝⎭. (1)求3f π⎛⎫⎪⎝⎭的值; (2)若4cos 5θ=,3,22πθπ⎛⎫∈ ⎪⎝⎭,求6f πθ⎛⎫- ⎪⎝⎭.16.(本小题满分12分)在等差数列{}n a 中,已知35a =,713a =. (1)求数列{}n a 的首项和公差d ; (2)求数列{}1n a +的前n 项和n S .17.(本小题满分14分)如图所示,四棱锥P ABCD -的底面ABCD 是边长为2的菱形,60BAD ∠=,2PB PD ==,PA =(1)证明:PC BD ⊥;(2)求四棱锥P ABCD -的体积.18.(本小题满分14分)如图所示,过圆224x y +=外一点()2,3P 引该圆的两条切线PA 和PB ,A 、B 为切点. (1) 求直线AB 的方程; (2) 求P 到直线AB 的距离.19.(本小题满分14分)是否存在这样的三角形?它的三边长是三个连续的自然数,且最大角是最小角的2倍,若存在,求出所有这样的三角形;若不存在,说明理由.20.(本小题满分14分)设数列{}n a 的前n 项和n S 满足11221n n n S a ++=-+,n N *∈,且1a 、25a +、3a 成等差数列. (1) 求1a ;(2)求数列{}n a 的通项公式; (3) 证明:对于任意的n N *∈,有1211132n a a a +++<.。

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试卷代号1354国家开放大学(中央广播电视大学)2014年春季学期“开放本科”期末考试高级英语阅读(2) 试题2014年7月.注意事项一、将你的学号、姓名及分校(工作站)名称填写在答题纸的规定栏内。

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Information for the ExamineesThis examination consists of two sections. These are:Section I: New Words (60 points, 40 minutes)Section II: Reading Comprehension (40 points, 50 minutes)The total marks for this examination are100 points.Time allowed for completing this exan1ination is 90 minutes.Section I New wordsColumn A Column B1. ______ egalitarian A. unknown2. ______ anonymous B. make someone feel better3. ______ drawback C. writing as an art form4. ______ international D. show in the form of a picture5. ______ reassure E. animals of the same type6. ______ calligraphy F. equal7. ______ depict G. garbage8. ______ species H. not flexible9. ______ trash I. among other countries10. _____ rigid J. disadvantage, unfavourable aspectcognitive colleagues identity intuition involvedmaturation memory neuroscientist psychologist researchersDear Rosemary,As you know, I’ve been looking for my identical twin sister for years, and I finally found her! Just as psychologists predict, we have many similarities. As you know, I’ve been 11 with work on the science of the brain. As a 12 I’ve studied long-term 13 , or how adults remerber events from childhood. Well, my sister is a 14 studying the same area, but with children. She wants to find out how memory changes with 15 or how the early memories of children and teenagers differ. We met by accident at a conference on 16 science. There were many 17 there, and one of my 18 from institue told me she had seen a woman who looked exactly like me. I went to the room where this woman was giving a presentation. I didn’t want to bother her, so I hid my 19 by sitting in the back. Her presentation was interesting, and afterward, I went to the front of the room. She looked at me without saying a word---then we just hugged each other. She said that her 20 told her that we’d find each other soon. It’s incredible, but I feel like I’ve known her all my life. Sh e’s coming to my house for dinner now; we both love to cook. More later!Your friend,ConnieSection II Reading ComprehensionCareer ChangeA People who are thinking about changing careers are often afraid of what will happen if they quit their job. Will they find another one? Will they like another field as well as the one they are in now? Will they be able to grow and advance in a new organization?B As these questions come to mind, they should try to figure out the answers so they can reach a decision. Although there is a high rate of unemployment in some countries, there are usually jobs for skilled workers who can use computers or other equipment. Those who have specialized training in these areas can generally find a position without too much effort.C The question of whether they'll like another field more than their current one is also a crucial one. While it's nice to dream about having another job, the reality may be that they aren't suited for it. For example, if an architect likes to cook but has no idea about how to run a business, it may be risky for him to open a restaurant. He can cook for his friends on weekends and satisfy his dreams of being a chef in that way.D Another good way for a person to find out if she will be successful in a new field is to try it out as a part -time job. Being an event planner sounds glamorous, but helping friends with parties or weddings might show her that it's also very stressful. However, if she has the creativity and organization necessary for such a position, she can continue to plan events for friends until she builds up a reputation. Then she can leave her current job to look for a job in event planning knowing that she'll be successful in this area.E Once a person has found his or her specialty and decides on the change, it's necessary to stick with it until the business gets off the ground. This usually takes about five years. If the move has been from one company to another, the person should stay until it is clear he is doing a good job and can advance to a higher position. Following this advice will make the transition smoother and the career change successful. (371 words)Complete the following statements by choosing the best from the answers A, B, C, or D.21. According to the reading, people who think about changing careers generally _______A. quit their jobsB. are afraid of quitting their jobsC. find another one right awayD. grow and advance in a new organization22. There is a high rate of unemployment in some countries, but skilled workers ________A. lose their jobsB. try to reach a decisionC. use computersD. with training can still get jobs23. lf a person dreams about doing another job, ________.A. he is suited for itB. he can run a businessC. he still may not be able to do itD. he will be satisfied as a chef24. Having a part-time job ___________.A. is a good way to try another careerB. sounds glamorousC. is very stressfulD. builds up a person's career25. You should stay in a new career at least five years because _________.A. it's your specialtyB. you moved from one company to anotherC. you can do a good job and advance in that timeD. the transition will be smootherTelecommunitingA As cities become more expensive and crowded, workers often have to move farther away from their offices in order to find affordable housing in desirable neighborhoods. Sometimes they have to travel an hour or more to work and black and endure a lot of traffic. One popular alternative to the frustrating morning commute is telecommuting. Telecommuniting involves working from home and communicating with an employer by phone, fax, or computer. Changing technology makes telecommuting increasingly easy and popular. Some telecommuters work at home full-time, while others go into the office one or two days and work at home the rest of the wek. It is estimated that between 18 and 23 million people telecommute in the United States, and between 1.6 and 2 million people telecommute in both the U.K. and Germany. And the numbers are growing. Why are so many people telecommuting? What are the advantages, and do they outweigh the disadvantages?B Telecommuting has many advantages. In addition to saving people from the stressful morning commute, it also allows for more flexibility in the workplace. Telecommuters can plan their own schedules; they can customize their work environments; and they can work from anywhere. Often, people with children like to telecommute because it means building a work schedule around family demands and commitments. Additionally, home-offices can provide good tax benefits for telecommuters. Finally, for those who don’t like the office atmosphere, office politics, or those long, never-ending meetings, telecommuting can provide a release. Telecommuting not only provides advantages to the worker, it benefits the environment as well. It contributes to cleaner air (less pollution emitted from cars), decreased traffic, and job growth in rural areas that might not otherwise offer employment options.C Telecommuting has disadvantages as well. For instance, some workers may telecommute not out of choice but because the employer doesn’t wish to provide office space, a work station, or the benefits that on-site employees receive. Another drawback is that not everyone can telecommute. Certain jobs, such as media and publishing, consulting, sales, and telemarketing lend themselves better to telecommuting than others. Some people find it very difficult to work at home. The TV, the refrigerator, the bed, e-mail, and the telephone can be big disastractions for telecommuters. On the other hand, some telecommuters can’t separate work from home and have a tendency to overwork. Other disadvantages of telecommuting include the difficulty of office relationships. Sometimes if a worker splits his or her time between home and theoffice, co-workers who don’t have the opportunity to work at home might feel resentful. Managers might feel powerless to control employees who aren’t on site. Finally, if working from home makes you feel isolated or lonely, then telecommuting is probably not for you.D Jeff and Nancy found a way to use telecommuting to change their lives. “Not only do we have a better lifestyle, we have a better life,”says Nancy. Three years ago, the couple sold their Manhattan apartment and bought a mobile home. When they are not traveling around the United States, they live in their adobe bungalow in Santa Fe, New Mexico. “When we saw Santa Fe, we fell in love with the place immdediately. But before selling our New York apartment, we spent the year making connectins and researching our options for work that we could do.” Nancy does work for a publisher, and Jeff works as an independent consultant. Both invested in laptops and say that technology such as wireless Web access and cell phones help them when they’re on the road. Recently, Nancy wrote cookbook for campers that she has started selling through specialty catalogs and Web sites. “Through telecommuting we are able to make enough money to survive without dipping into our net egg, and we haven’t given up any of the things we enjoy. Telecommuting is our livelihood.”E According to statistice, the number of telecommuters in the United States rose by 3 million between 1999 and 2000. Will the numbers continue to improve, perhaps everyone will be working in “virtual offices”and the traditional office will disappear. No one knows for sure, but we can be certain that telecommuting is not a fad. It is a practical alternative to the traditional office job, an alternative which is here to stay.Decide whether the following statements are true or false. Write "T" for True and "F" for False on the Answer Sheet.26. People who like working in an office will probably like telecommuting.27. Telecommuting is possible for people in all professionals.28. Telecommuting has helped Jeff and Nancy change their lifestyle.29. Telecommuting is more flexible than traditional office work.30. Telecommuting is a fad that will probably disappear soon.。

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