海淀2015.01期末试卷
【英语】北京市海淀区2015届高三上学期期末考试试卷.docx

北京市海淀区2015 届高三上学期期末考试英语试卷满分 :班级: _________姓名:_________考号:_________一、单选题(共15 小题)1. My normal monthly emails to and _______ pen pals have disappeared with my tight schedule.A . in B. forC. from D. through2. ---Have you heard about the shark attack accident at the SeaWorld show?---Yeah, how horrible! A trainer ______ in front of the audience.A . had been killed B. has been killedC. was killed D. is killed3. The Subway Line 16 _______ in Beijing is planned to open this year.A . being built B. buildingC. built D. to build4. This room isn ’t actually _______ I wanted when I made my reservation.A . what B. whereC. which D. whether5. My boss is very generous, and he is ______ generous when we get a big order.A . very B. most C. only D .rather6. The spread of the Ebola virus in Nigeria is believed _______ by August, 2014.A . to be controlled B. to have been controlledC. to control D. to have controlled7. We have an adviser on hand in this activity _______ you have any worries or problems.A . when B. now thatC. though D. in case8. ---Do I have to bring my camera tomorrow afternoon?---I think so . We _______ the Botanical Garden then.A . will be visiting B. are visitingC. have visited D. visit9. ---The zookeeper was really annoyed with me.--- How could he have been if you _______ stones at the animals?A . didn ’t throw B. don ’t throwC. hadn ’t thrown D. haven ’t thrown10. Every Monday, my English teacher would cheerfully ask me _______ my weekend had been.A . that B. if C. what D .how11. With doubts _______ through my mind, I felt it necessary to carry out a research.A . to run B. runC. running D. having run12. ---You seem busy these days.---Yes. I ’m writing a story .You know, it ’s really not easy to write _______ with attractive plots.A . thisB. oneC. itD. that13. According to the latest BBC news, a five-year-old boy from England _______ the youngest computer specialist in the world .A . became B. becomesC. had become D. has become14 . The glorious moment would live in my mind ________ our football team won the championship.A . when B. where C. that D .which15. ---Tom, why don ’t we help our son work on his papers?---We’ vealready done more than we ________ . He is on his own this time.A . would B. should C. could D .might二、完形填空(共 1 小题)16.阅读下面短文,掌握其大意,从每题所给的 A 、 B、 C、 D 四个选项中,选出最佳选项。
2015年海淀区高三第一学期期末练习英语试卷及答案

海淀区高三年级第一学期期末练习英语2015.01本试卷共12页,共150分。
考试时长120分钟。
注意事项:1.考生务必将答案答在答题卡上,在试卷上作答无效。
2.答题前考生务必将答题卡上的姓名、准考证号用黑色字迹的签字笔填写。
3.答题卡上选择题必须用2B铅笔作答,将选中项涂满涂黑,黑度以盖住框内字母为准,修改时用橡皮擦除干净。
非选择题必须用黑色字迹的签字笔按照题号顺序在各题目的答题区域内作答,未在对应的答题区域内作答或超出答题区域作答的均不得分。
第一部分:听力理解(共三节,30分)第一节(共5小题;每小题1.5分,共7.5分)听下面5段对话。
每段对话后有一道小题,从每题所给的A、B、C三个选项中选出最佳选项。
听完每段对话后,你将有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话你将听一遍。
1. What musical instrument can the woman play?A. The guitar.B. The violin.C. The piano.2. Where does the conversation probably take place?A. At home.B. In a shop.C. In a restaurant.3. What will the woman probably do on Thursday?A. Have dinner with the man.B. Go to a classical concert.C. Prepare for a job interview.4. What does the man think of the woman in language learning?A. Smart.B. Talented.C. Hard-working.5. What was wrong with the woman’s watch?A. 5 minutes fast.B. 15 minutes slow.C. 15 minutes fast.第二节(共10小题;每小题1.5分,共15分)听下面4段对话或独白。
【物理】北京市海淀区2015届高三上学期期末试题(精校解析版).docx

北京市海淀区2015 届高三上学期期末考试物理试卷一、本题共10 小题,每小题 3 分,共 30 分.在每小题给出的四个选项中,有的小题只有一个选项是正确的,有的小题有多个选项是正确的.全部选对的得 3 分,选不全的得 2 分,有选错或不答的得0 分.把你认为正确的答案填涂在答题纸上.1.在真空中有两个固定的点电荷,它们之间的静电力大小为 F .现保持它们之间的距离不变,而使它们的电荷量都变为原来的 2 倍,则它们之间的静电力大小为()A .FB.1FC. 2FD. 4F 2【答案】 D.【解析】距离改变之前:F= kQq2①r当电荷量都变为原来的 3 倍时: F 1= k 2Q 2q②r 2联立①②可得: F 1=4 F,故 ABC 错误, D 正确.【考点】库仑定律..2.关于电场强度和磁感应强度,下列说法中正确的是()A .电场强度的定义式E= F适用于任何静电场qB.电场中某点电场强度的方向与在该点的带正电的检验电荷所受电场力的方向相同C.磁感应强度公式B= F说明磁感应强度 B 与放入磁场中的通电导线所受安培力 F 成IL正比,与通电导线中的电流I 和导线长度L 的乘积成反比D .磁感应强度公式B= F说明磁感应强度的方向与放入磁场中的通电直导线所受安培IL力的方向相同【答案】 AB【解析】电场强度的定义式E=适用于任何电场.故 A 正确;根据电场强度方向的规定:电场中某点电场强度的方向与在该点的带正电的检验电荷所受电场力的方向相同.故 B 正确;磁感应强度公式B= F是定义式,磁感应强度的大小与方向由磁场本身决定,与放入磁场IL中的通电导线所受安培力 F 无关,与通电导线中的电流I 和导线长度L 的乘积无关.故C 错误;根据左手定则,磁感应强度的方向与置于该处的通电导线所受的安培力方向垂直.故D 错误.【考点】磁感应强度;电场强度..3.在如图所示电路中,电压表、电流表均为理想电表,电源内阻不可忽略.开关S闭合后,在滑动变阻器R1的滑片 P 向右端滑动的过程中()A .电压表的示数减小B .电压表的示数增大C.电流表的示数减小 D .电流表的示数增大【答案】 BD.【解析】当滑片右移时,滑动变阻器接入电阻增大,则外电路总电阻增大,电路中总电流减小,电源的内电压减小,则由闭合电路欧姆定律可知,电路的路端电压增大,故电压表示数增大;由欧姆定律可知,R3上的分压减小,而路端电压减小,故并联部分的电压增大,则电流表示数增大,故BD 正确, AC 错误;【考点】闭合电路的欧姆定律..4.如图所示为研究影响平行板电容器电容大小因素的实验装置.设两极板的正对面积为S,极板间的距离为d,静电计指针偏角为θ,平行板电容器的电容为C.实验中极板所带电荷量可视为不变,则下列关于实验的分析正确的是()A .保持 d 不变,减小B.保持 d 不变,减小C.保持 S 不变,增大D.保持 S 不变,增大S,则 C 变小,θ变大S,则 C 变大,θ变大d,则 C 变小,θ变大d,则 C 变大,θ变大【答案】 AC.【解析】根据电容的决定式C=rS得知,当保持 d 不变,减小 S,则 C 变小,电容器的4kd电量 Q 不变,由电容的定义式C= Q分析可知板间电势差增大,则静电计指针的偏角θ变U大.故 A 正确, B 错误.根据电容的决定式C=rS得知,保持 S 不变,增大 d ,则 C 变4 kd小,电容器极板所带的电荷量Q 不变,则由电容的定义式C= 分析可知板间电势差增大,静电计指针的偏角 θ变大,故 C 正确, D 错误.【考点】电容器的动态分析..5.如图所示, a 、 b 、 c 是一条电场线上的三点,一个带正电的粒子仅在电场力的作用下沿这条电场线由 a 运动到 c 的过程中, 其动能增加. 已知 a 、b 间距离等于b 、c 间距离,用 φ、aφ、φ 分别表示 a 、b 、c 三点的电势,用 E 、E 、E 分别表示a 、b 、c 三点的场强大小.根bcabc据上述条件所做出的下列判断中一定正确的是()A .E> E > Ec C .φa ﹣ φ ﹣φ > φ>φa =Eb =Ec B .E abb =φbc D . φa bc【答案】 D .【解析】 电场线的疏密表示场强的相对大小, 一条电场线不能确定电场线的疏密, 故无法知道电场强度的大小关系.故A 、B 错误.由于 E 的大小不确定,由公式U =Ed 不分析电势差的大小,故 C 错误.顺着电场线电势一定逐渐降低,则φ> φ> φ.故 D 正确.abc【考点】电场线. .6.如图甲所示,一闭合线圈固定在垂直于纸面的匀强磁场中,且线圈平面与磁场垂直.设垂直纸面向里为磁感应强度B 的正方向,磁感应强度 B 随时间而变化的情况如图乙所示,图甲中线圈上的箭头的方向为感应电流i 的正方向.则在下图中给出的线圈中感应电流 i 随时间而变化的图象可能的是()A .B .C .D .【答案】 C .【解析】设垂直纸面向里的磁感应强度方向为正,线圈中顺时针方向的感应电流为正,由乙可知:线圈中在前0.5s 内磁场增加,则根据楞次定律可得:逆时针方向的感应电流,即为负值.在前0.5s 到 1s 内,若磁场方向垂直向里(正方向)时,且磁场减小的;根据楞次定律可知,感应电流的方向顺时针方向,即为正值.再根据法拉第电磁感应定律,则有感应电动势恒定,则感应电流也恒定,综上所述,故 C 正确, ABD 错误;【考点】法拉第电磁感应定律;闭合电路的欧姆定律..7.如图甲所示,一理想变压器原、副线圈匝数之比为55: 6,其原线圈两端接入如图乙所示的正弦交流电,副线圈通过电流表与负载电阻R=48Ω相连.若交流电压表和交流电流表都是理想电表,则下列说法中正确的是()A .变压器输入电压的最大值是220VB .若电流表的示数为 0.50A ,变压器的输入功率是12WC.原线圈输入的正弦交变电流的频率是50HzD .电压表的示数是 24 2 V【答案】 BC【解析】由图乙可知交流电压最大值U m=220 2 V,故A错误;理想变压器原、副线圈匝数之比为55:6,电阻 R 的电压为U2n2 U16220 24V ,电压表的示数是24V.电n155阻为 48Ω,所以流过电阻中的电流为0.5A,变压器的输入功率是:P入P出U 22242=12W .故B正确,D错误;由图乙可知交流电周期T=0.02s,可由R48周期求出正弦交变电流的频率是50Hz,故 C 正确.【考点】变压器的构造和原理..8.如图所示, A l和 A 2是两个规格完全相同的灯泡, A l与自感线圈L 串联后接到电路中,A 2与可变电阻串联后接到电路中.先闭合开关S,缓慢调节电阻R,使两个灯泡的亮度相同,再调节电阻R1,使两个灯泡都正常发光,然后断开开关S.对于这个电路,下列说法中正确的是()A .再闭合开关S 时, A 2先亮, A l后亮B .再闭合开关S 时, A l和 A 2同时亮C.再闭合开关S,待电路稳定后,重新断开开关S, A 2立刻熄灭, A 1过一会儿熄灭D .再闭合开关S,待电路稳定后,重新断开开关S, A l和 A 2都要过一会儿才熄灭【答案】 AD【解析】再次闭合开关S 时,滑动变阻器R 不产生感应电动势,灯泡 A 2立刻正常发光,线圈的电流增大,产生自感电动势,根据楞次定律得知,感应电动势阻碍电流的增大,使得电流逐渐增大, A l灯逐渐亮起来.故 A 正确, B 错误;再闭合开关S,待电路稳定后,重新断开开关 S,A l和 A 2与 L 、R 构成一个闭合回路,由于自感,A l和A2都要过一会儿才熄灭.故C 错误, D 正确.【考点】自感现象和自感系数..9.如图所示,在光滑绝缘水平面上,两个带等量正电的点电荷分别固定在 A 、 B 两点, O 为 AB 连线的中点, MN 为 AB 的垂直平分线.在MN 之间的 C 点由静止释放一个带负电的小球(可视为质点),若不计空气阻力,则()A .小球从 C 点沿直线MN 向 N 端运动,先做匀加速运动,后做匀减速运动B .小球从C 点运动至距离该点最远位置的过程中,其所经过各点的先电势先降低后升高C.小球从 C 点运动至距离该点最远位置的过程中,其电势能先减小后增大D.若在两个小球运动过程中,两个点电荷所带电荷量同时等量地缓慢增大,则小球往复运动过程中的振幅将不断增大【答案】 C.【解析】等量正点电荷的电场是非匀强电场,小球从 C 点沿直线 MN 向 N 端运动,电场强度是变化的,所受的电场力是变化的,故先做变加速运动,后做变减速运动,故 A 错误. MO 段电场线方向向上, ON 段电场线方向向下,则小球从 C 点运动至距离该点最远位置的过程中,电势先升高后降低.故 B 错误.小球从 C 点运动至距离该点最远位置的过程中,电场力先做正功后做负功,其电势能先减小后增大,故 C 正确.伴随两个点电荷电荷量的增加,由于对小球在同一位置的电场力变大,减速的距离减小,故振幅变小,故 D 错误.【考点】电场线. .10.回旋加速器在核科学、核技术、核医学等高新技术领域得到了广泛应用,有力地推动了现代科学技术的发展.回旋加速器的原理如图所示, D1和 D 2是两个正对的中空半圆金属盒,它们的半径均为 R,且分别接在电压一定的交流电源两端,可在两金属盒之间的狭缝处形成变化的加速电场,两金属盒处于与盒面垂直、磁感应强度为 B 的匀强磁场中. A 点处的粒子源能不断产生带电粒子,它们在两盒之间被电场加速后在金属盒内的磁场中做匀速圆周运动.调节交流电源的频率,使得每当带电粒子运动到两金属盒之间的狭缝边缘时恰好改变加速电场的方向,从而保证带电粒子能在两金属盒之间狭缝处总被加速,且最终都能沿位于D2盒边缘的 C 口射出.该回旋加速器可将原来静止的α粒子(氦的原子核)加速到最大速率 v,使它获得的最大动能为E k.若带电粒子在 A 点的初速度、所受重力、通过狭缝的时间及 C 口的口径大小均可忽略不计,且不考虑相对论效应,则用该回旋加速器()A .能使原来静止的质子获得的最大速率为vB .能使原来静止的质子获得的动能为E kC.加速质子的交流电场频率与加速α粒子的交流电场频率之比为1: 1D .加速质子的总次数与加速α粒子总次数之比为2:1【答案】 D.【解析】设 D 形盒的半径为R.根据 qvB=m v2,解得粒子获得的最大 v=qBR,R 相同, v R m与比荷成正比.由于质子的比荷是α粒子的 2 倍,则质子获得的最大速率为2v.带电粒子1222q B R,不改变 B 和 R,该回旋加速器加速获得的最大动能 E K = mv2 =α粒子获得的最22m大动能等于加速质子的最大动能,故 A 、B 错误;交变电场的周期与带电粒子运动的周期相等,带电粒子在匀强磁场中运动的周期T= 2 m,频率 f==Bq与比荷成正比,所以加速Bq 2 m质子的交流电场频率与加速α粒子的交流电场频率之比为2: 1,故 C 错误;设加速电压为U,加速次数为n,则 E K =nqU,n= Ek, E K和 U 相等,则加速质子的总次数与加速α粒子qU总次数之比为2: 1,故 D 正确.【考点】质谱仪和回旋加速器的工作原理..二、本题共 2 小题,共15 分.11.指针式多用电表是电路测量的常用工具.现用多用电表测量一个定值电阻的阻值(阻值约为一百多欧姆).(1)将红、黑表笔分别插入“+”、“﹣”插孔,接下来必要的操作步骤和正确的顺序是__________.(请将必要步骤前的序号按正确的顺序写出)①将选择开关旋转“× 10的”位置;②将选择开关旋转“× 100的”位置;③用两支表笔的金属部分分别接触电阻的两条引线;④根据指针所指刻度和选择开关的位置,读出电阻的阻值;⑤将两支表笔直接接触,调整“欧姆调零旋钮”使指针指向“0Ω”.(2)若正确测量时指针所指刻度如图10 所示,则这个电阻阻值的测量值是_______ Ω.(3)在使用多用电表测量电阻时,若双手捏住红、黑表笔金属部分,则测量结果将_______.(选填“偏大”或“偏小”)【答案】( 1)①⑤③④;( 2)130;( 3)偏小.【解析】( 1)待测电阻阻值约为一百多欧姆,用欧姆表测电阻,将选择开关旋转“× 10的”位置,然后进行欧姆调零,具体操作是:将红黑表笔短接,调节调零旋钮调零,使指针指在右侧零刻度线处;再测出电阻阻值,因此合理是实验步骤为:①⑤③④.(2)由图示表盘可知,待测电阻阻值为:13×10=130Ω;(3)由于人体是导体,在使用多用电表测量电阻时,若双手捏住红、黑表笔金属部分,测量的是导体与人的并联电阻,电阻越并越小,因此,测量结果将偏小.【考点】用多用电表测电阻. .12.在“描绘小灯泡的伏安特性曲线”实验中,小灯泡的额定电压为2.5V ,额定功率为0.5W ,此外还有以下器材可供选择:A .直流电源3V (内阻不计)B.直流电流表0~300mA (内阻约为5Ω)C.直流电流表0~3A (内阻约为0.1 Ω)D.直流电压表0~ 3V (内阻约为3k Ω)E.滑动变阻器100 Ω, 0.5AF.滑动变阻器10Ω, 2AG.导线和开关实验要求小灯泡两端的电压从零开始变化并能进行多次测量.(1)实验中电流表应选用_____-,滑动变阻器应选用_________(均填写仪器前的字母)(2)在图 1 所示的虚线框中画出符合要求的实验电路图(虚线框中已将所需的滑动变阻器画出,请补齐电路的其他部分,要求滑片P 向 b 端滑动时,灯泡变亮) ;(3)根据实验数据,画出的小灯泡I ﹣ U 图线如图 2 所示.由此可知,当电压为0.5V 时,小灯泡的灯丝电阻是 ________Ω;(4)根据实验测量结果可以绘制小灯泡的电功率P 随其两端电压 U 或电压的平方U 2 变化的图象, 在图 3 中所给出的甲、 乙、丙、丁图象中可能正确的是_______.(选填 “甲 ”、“乙 ”、“丙”或 “丁 ”)【答案】( 1) B ;F ( 2)如答图所示; ( 3)5.0;( 4)甲、丙【解析】( 1)灯泡的额定电流 I=P 0=0.5 B ;=200mA ;故电流表选择 U 02.5因本实验只能接用分压接法,故滑动变阻器选择小电阻F ;( 2)根据实验要求可知,滑动变阻器采用分压接法,并且测量电路应与滑动变阻器的左半部分并联;电流表采用外接法;原理图如下;(3)由画出的伏安特性曲线可知, U =0.5V 时,电流 I=0.10A ,则对应的电阻 U 0.5R= ==5Ω;I0.1(4)由 P= U2可知, P 与 U 为二次函数关系,图象开口向上;故甲正确;RP 与 U2,在 R 不变时为正比例关系,由于R 随电压的增大而减小;故丙图正确;【考点】描绘小电珠的伏安特性曲线..三、本题包括 6 小题,共 55 分.解答应写出必要的文字说明、方程式和重要的演算步骤.只写出最后答案的不能得分,有数值计算的题,答案中必须明确写出数值和单位.13.如图所示,在沿水平方向的匀强电场中有一固定点O,用一根长度为l=0.20m 的绝缘轻线把质量为m=0.10kg 、带有正电荷的金属小球悬挂在O 点,小球静止在 B 点时轻线与竖直方向的夹角为θ=37°.现将小球拉至位置A,使轻线水平张紧后由静止释放.g 取 10m/s2,sin37 =0°.60 ,cos37 °=0.80 .求:(1)小球所受电场力的大小;(2)小球通过最低点 C 时的速度大小;(3)小球通过最低点 C 时轻线对小球的拉力大小.【答案】( 1)电场力的大小为0.75N,方向水平向右;(2)小球运动通过最低点 C 时的速度大小为1m/s;(3)小球通过最低点 C 时细线对小球的拉力大小为 1.5N.【解析】( 1)小球受重力mg、电场力 F 和拉力 T,其静止时受力如答图 2 所示.根据共点力平衡条件有:F=mgtan37 °=0.75N(2)设小球到达最低点时的速度为v,小球从水平位置运动到最低点的过程中,根据动能定理有: mgl ﹣ Fl = 1mv22解得: v=2gl (1tan 370 ) =1.0m/s。
2014-2015学年北京市海淀区初一第一学期期末数学试题(含答案)

海淀区七年级第一学期期末练习数学2015.1班级姓名成绩一.选择题(本大题共30分,每小题3分)在下列各题的四个备选答案中,只有一个是正确的.请将正确选项前的字母填在表格中相应的位置.1.-A . 2B .21-C .21D .-22.全面贯彻落实“大气十条”,抓好大气污染防治,是今年环保工作的重中之重.其中推进燃煤电厂脱硫改造15000 000千瓦是《政府工作报告》中确定的重点任务之一.将数据15 000 000用科学记数法表示为A .15×106B . 1.5×107C .1.5×108D .0.15×108 3.下列各式结果为正数的是A .22--()B .32-() C .2--D .2--()4.下列计算正确的是A .2527a a a +=B .523a b ab-=C .523a a -=D .3332ab ab ab -+=5.如图,把原来弯曲的河道改直,A ,B 两地间的河道长度变短,这样做的道理是 A .两点确定一条直线 B .两点确定一条线段 C .两点之间,直线最短 D .两点之间,线段最短BA6.从三个不同方向看一个几何体,得到的平面图形如图所示,则这个几何体是A .圆柱B .圆锥C .棱锥D .球7.若2是关于x 的方程112x a +=-的解,则a 的值为 A .0B .2C .2-D .6-8.有理数a ,b 在数轴上的位置如图所示,则下列各式成立的是A .b -a >0B .-b >0C .a >-bD .-ab <0 9.已知33x y -=,则53x y -+的值是 A .8B .2C .2-D .8-10.已知线段AB =6cm ,若M 是AB 的三等分点,N 是AM 的中点,则线段MN 的长度为 A .1cmB .2cmC .1.5cmD .1cm 或2cm二.填空题(本大题共24分,每小题3分) 11.比较大小:2-3-(填“>”,“<”或“=”). 12.写出一个以1为解的一元一次方程. 13.若=2040α∠′,则α∠的补角的大小为.14.商店上月收入为a 元,本月的收入比上月的2倍还多5元,本月的收入为元(用含a 的式子表示).15.若22(3)0a b -++=,则2a b -的值为_____________.16.将一副三角板如图放置,若=20AOD ∠︒,则BOC ∠的大小为____________.0 ba17.已知关于x 的方程7kx x =-有正整数解,则整数k 的值为.18.有一组算式按如下规律排列,则第6个算式的结果为________;第n 个算式的结果为_________________________(用含n 的代数式表示,其中n 是正整数).1 = 1 (-2) + (-3) + (-4) = -9 3 + 4 + 5 + 6 + 7 = 25 (-4) + (-5) + (-6) + (-7) + (-8) + (-9) + (-10) = -49 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 = 81…… 三.解答题(本大题共18分,第19题6分, 第20题各4分,第21题各8分) 19.计算:(1)12(18)(7)15--+--;(2)()()2316821⎪⎭⎫⎝⎛-÷-+-⨯⎪⎭⎫ ⎝⎛-.20.如图,平面上四个点A ,B ,C ,D .按要求完成下列问题: (1)连接AD ,BC ;(2)画射线AB 与直线CD 相交于E 点;(3)用量角器度量得∠AED 的大小为_________(精确到度).B A21.解方程:(1)2(10)6x x x -+=;(2)12324x x+-=+.四.解答题(本大题共12分,每小题4分)22.先化简,再求值:()()a a a a a 3225222---+,其中5-=a .23. 点A ,B ,C 在同一直线上,AB =8,AC : BC =3 : 1,求线段BC 的长度.24.列方程解应用题:甲种铅笔每支0.4元,乙种铅笔每支0.6元,某同学共购买了这两种铅笔30支,并且买乙种铅笔所花的钱是买甲种铅笔所花的钱的3倍,求该同学购买这两种铅笔共花了多少钱?五.解答题(本大题共16分,第25题5分,第26题各5分,第27题各6分)25.如图,将连续的偶数2,4,6,8,10,…排成一数阵,有一个能够在数阵中上下左右平移的T 字架,它可以框出数阵中的五个数.试判断这五个数的和能否为426,若能,请求出这五个数,若不能,请说明理由.26. 用“☆”定义一种新运算:对于任意有理数a 和b ,规定a ☆b =22ab ab a ++. 如:1☆3=2132131⨯+⨯⨯+=16. (1)求(-2)☆3的值;(2)若(12+a ☆3)☆(-12)=8,求a 的值; (3)若2☆x =m ,1()4x ☆3=n (其中x 为有理数),试比较m , n 的大小.27.如图1,AOB=α∠,COD β∠=,OM ,ON 分别是∠AOC ,∠BOD 的角平分线. (1)若∠AOB =50°,∠COD =30°,当∠COD 绕着点O 逆时针旋转至射线OB 与OC 重合时(如图2),则∠MON 的大小为______________;(2)在(1)的条件下,继续绕着点O 逆时针旋转∠COD ,当∠BOC =10°时(如图3),求∠MON 的大小并说明理由;(3)在∠COD 绕点O 逆时针旋转过程中,∠MON =__________________________.(用含αβ,的式子表示).图3N MDCB OA图2NMD(C )B OA图1N M DCB O A海淀区七年级第一学期期末练习数 学参考答案及评分标准2015.1说明: 合理答案均可酌情给分,但不得超过原题分数 . 一、选择题(本大题共30分,每小题3分)二、填空题(本大题共24分,每小题3分)11.> 12.x =1(答案不唯一) 13.15920'︒ 14.(2a +5) 15.8 16.160︒ 17.0或6 18.-121; 12(1)(21)n n +-- (第一个空1分,第二个空2分)三、解答题(本大题共18分,第19题6分,第20题4分,第21题8分) 19.(1)解:原式1218715=+--30715=--=8. ………………………………3分(2)解:原式=4(6)9+-⨯ ………………………………2分 =-50. ………………………………3分 20.(1)图略; ………………………………1分 (2)图略; ………………………………3分 (3)30︒ (误差1︒不扣分). ………………………………4分 21.(1)解:原方程可化为2106x x x --=.………………………………2分 510x =-.………………………………3分2x =- . ………………………………4分 (2)解:原方程可化为2(1)12(2)x x +=+-. ………………………………2分2214x x +=-. 312x = .4x =. ………………………………4分四.解答题(本大题12分,每小题4分)22.解:原式2225226a a a a a =+--+ ………………………………1分244a a =+. ………………………………2分当5a =-时,原式24(5)45=⨯--⨯………………………………3分10020=-80=. ………………………………4分23.解:由于AC : BC =3 : 1,设BC x =,则3.AC x = 第一种情况:当点C 在线段AB 上时,AC BC AB +=.因为 AB =8,所以 38.x x += 解得 2.x =所以 2.BC = ………………………………2分第二种情况:当点C 在AB 的延长线上时,.AC BC AB -=因为 AB =8, 所以 38.x x -= 解得 4.x =所以 4.BC = …………………………4分综上,BC 的长为24或.24.解:设该同学购买甲种铅笔x 支,则购买乙种铅笔(30-x )支. ………………1分根据题意可列方程 0.630)30.4x x -=⨯(. …………………………2分 解得 x = 10. …………………………3分则 0.63010)0.4101-+⨯=(元. 答:该同学购买这两种铅笔共花了16元. …………………………4分C BA CB五、解答题(本大题共 16分,第25题5分,第26题5分,第27题6分)25. 解:这五个数的和能为426. 原因如下:设最小数为x ,则其余数为10,12,14,20x x x x ++++. ………………1分 由题意得,(10)(12)(14)(20)426x x x x x ++++++++=. ………………3分 解方程得, x =74. …………………………4分 所以这五个数为74,84,86,88,94. …………………………5分26. (1)解:(-2)☆32232(2)3(2)32=-⨯+⨯-⨯+-=-. …………………………1分(2)解:2111133238(1)2222a a a a a ++++=⨯+⨯⨯+=+☆. ……………………2分解得, 3.a = …………………………3分(3)解:由题意222222242m x x x x =+⨯+=++,21113234444n x x x x =⨯+⨯⨯+=, 所以 2220m n x -=+>.所以 m n >. …………………………5分27.(1)40°. …………………………1分(2)解:因为∠BOD =∠BOC+∠COD=10°+30°=40°,因为ON 平分∠BOD , 所以∠BON =11402022BOD ∠=⨯=. 因为∠AOC =∠BOC+∠AOB=10°+50°=60°, 因为OM 平分∠AOC , 所以∠COM =11603022AOC ∠=⨯=. 所以∠BOM =∠COM-∠BOC=30°-10°=20°.所以∠MON =∠MOB+∠BON=20°+20°=40° . …………………………4分(3)12αβ+() 或11802αβ-+(). …………………………6分2118(1)()28(1)()8(1)8.22a a a +⨯-+⨯+⨯-++=课时安排:2 课时教学过笛的呢?(展示课件第四屏)2.思考:为什么爷爷的芦笛声会让强强感到一股浓浓的海水味呢?想象中的爷爷的芦笛声到底给了强强怎样的感受呢?3.带着美好的憧憬,齐读第一小节。
2014-2015学年北京市海淀区2015届九年级上学期期末考试数学试题(含答案)

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2014-2015 海淀区初三数学第一学期期末练习 2015.1
一、选择题
1.方程 x2 3x 5 0 的根的情况是( )
2014-2015学年北京市海淀区初一第一学期期末数学试题(含答案)

海淀区七年级第一学期期末练习数学2015.1班级姓名成绩一.选择题(本大题共30分,每小题3分)在下列各题的四个备选答案中,只有一个是正确的.请将正确选项前的字母填在表格中相应的位置.题号 1 2 3 4 5 6 7 8 9 10 答案1.-A . 2B .21-C .21D .-22.全面贯彻落实“大气十条”,抓好大气污染防治,是今年环保工作的重中之重.其中推进燃煤电厂脱硫改造15000 000千瓦是《政府工作报告》中确定的重点任务之一.将数据15 000 000用科学记数法表示为A .15×106B . 1.5×107C .1.5×108D .0.15×108 3.下列各式结果为正数的是A .22--()B .32-()C .2--D .2--()4.下列计算正确的是A .2527a a a +=B .523a b ab-=C .523a a -=D .3332ab ab ab -+=5.如图,把原来弯曲的河道改直,A ,B 两地间的河道长度变短,这样做的道理是 A .两点确定一条直线 B .两点确定一条线段 C .两点之间,直线最短 D .两点之间,线段最短BA6.从三个不同方向看一个几何体,得到的平面图形如图所示,则这个几何体是A .圆柱B .圆锥C .棱锥D .球7.若2是关于x 的方程112x a +=-的解,则a 的值为 A .0B .2C .2-D .6-8.有理数a ,b 在数轴上的位置如图所示,则下列各式成立的是A .b -a >0B .-b >0C .a >-bD .-ab <0 9.已知33x y -=,则53x y -+的值是 A .8B .2C .2-D .8-10.已知线段AB =6cm ,若M 是AB 的三等分点,N 是AM 的中点,则线段MN 的长度为 A .1cmB .2cmC .1.5cmD .1cm 或2cm二.填空题(本大题共24分,每小题3分) 11.比较大小:2-3-(填“>”,“<”或“=”). 12.写出一个以1为解的一元一次方程. 13.若=2040α∠′,则α∠的补角的大小为.14.商店上月收入为a 元,本月的收入比上月的2倍还多5元,本月的收入为元(用含a 的式子表示).15.若22(3)0a b -++=,则2a b -的值为_____________.16.将一副三角板如图放置,若=20AOD ∠︒,则BOC ∠的大小为____________.0 ba17.已知关于x 的方程7kx x =-有正整数解,则整数k 的值为.18.有一组算式按如下规律排列,则第6个算式的结果为________;第n 个算式的结果为_________________________(用含n 的代数式表示,其中n 是正整数).1 = 1 (-2) + (-3) + (-4) = -9 3 + 4 + 5 + 6 + 7 = 25 (-4) + (-5) + (-6) + (-7) + (-8) + (-9) + (-10) = -49 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 = 81…… 三.解答题(本大题共18分,第19题6分, 第20题各4分,第21题各8分) 19.计算:(1)12(18)(7)15--+--;(2)()()2316821⎪⎭⎫⎝⎛-÷-+-⨯⎪⎭⎫ ⎝⎛-.20.如图,平面上四个点A ,B ,C ,D .按要求完成下列问题: (1)连接AD ,BC ;(2)画射线AB 与直线CD 相交于E 点;(3)用量角器度量得∠AED 的大小为_________(精确到度).B A21.解方程:(1)2(10)6x x x -+=;(2)12324x x+-=+.四.解答题(本大题共12分,每小题4分)22.先化简,再求值:()()a a a a a 3225222---+,其中5-=a .23. 点A ,B ,C 在同一直线上,AB =8,AC : BC =3 : 1,求线段BC 的长度.24.列方程解应用题:甲种铅笔每支0.4元,乙种铅笔每支0.6元,某同学共购买了这两种铅笔30支,并且买乙种铅笔所花的钱是买甲种铅笔所花的钱的3倍,求该同学购买这两种铅笔共花了多少钱?五.解答题(本大题共16分,第25题5分,第26题各5分,第27题各6分)25.如图,将连续的偶数2,4,6,8,10,…排成一数阵,有一个能够在数阵中上下左右平移的T 字架,它可以框出数阵中的五个数.试判断这五个数的和能否为426,若能,请求出这五个数,若不能,请说明理由.26. 用“☆”定义一种新运算:对于任意有理数a 和b ,规定a ☆b =22ab ab a ++. 如:1☆3=2132131⨯+⨯⨯+=16. (1)求(-2)☆3的值;(2)若(12+a ☆3)☆(-12)=8,求a 的值; (3)若2☆x =m ,1()4x ☆3=n (其中x 为有理数),试比较m , n 的大小.27.如图1,AOB=α∠,COD β∠=,OM ,ON 分别是∠AOC ,∠BOD 的角平分线. (1)若∠AOB =50°,∠COD =30°,当∠COD 绕着点O 逆时针旋转至射线OB 与OC 重合时(如图2),则∠MON 的大小为______________;(2)在(1)的条件下,继续绕着点O 逆时针旋转∠COD ,当∠BOC =10°时(如图3),求∠MON 的大小并说明理由;(3)在∠COD 绕点O 逆时针旋转过程中,∠MON =__________________________.(用含αβ,的式子表示).图3N MDCB OA图2NMD(C )B OA图1N M DCB O A海淀区七年级第一学期期末练习数 学参考答案及评分标准2015.1说明: 合理答案均可酌情给分,但不得超过原题分数 . 一、选择题(本大题共30分,每小题3分)二、填空题(本大题共24分,每小题3分)11.> 12.x =1(答案不唯一) 13.15920'︒ 14.(2a +5) 15.8 16.160︒ 17.0或6 18.-121; 12(1)(21)n n +-- (第一个空1分,第二个空2分)三、解答题(本大题共18分,第19题6分,第20题4分,第21题8分) 19.(1)解:原式1218715=+--30715=--=8. ………………………………3分(2)解:原式=4(6)9+-⨯ ………………………………2分 =-50. ………………………………3分 20.(1)图略; ………………………………1分 (2)图略; ………………………………3分 (3)30︒ (误差1︒不扣分). ………………………………4分 21.(1)解:原方程可化为2106x x x --=.………………………………2分 510x =-.………………………………3分2x =- . ………………………………4分 (2)解:原方程可化为2(1)12(2)x x +=+-. ………………………………2分2214x x +=-. 312x = .4x =. ………………………………4分四.解答题(本大题12分,每小题4分)22.解:原式2225226a a a a a =+--+ ………………………………1分244a a =+. ………………………………2分当5a =-时,原式24(5)45=⨯--⨯………………………………3分10020=-80=. ………………………………4分23.解:由于AC : BC =3 : 1,设BC x =,则3.AC x = 第一种情况:当点C 在线段AB 上时,AC BC AB +=.因为 AB =8,所以 38.x x += 解得 2.x =所以 2.BC = ………………………………2分第二种情况:当点C 在AB 的延长线上时,.AC BC AB -=因为 AB =8, 所以 38.x x -= 解得 4.x =所以 4.BC = …………………………4分综上,BC 的长为24或.24.解:设该同学购买甲种铅笔x 支,则购买乙种铅笔(30-x )支. ………………1分根据题意可列方程 0.630)30.4x x -=⨯(. …………………………2分 解得 x = 10. …………………………3分则 0.63010)0.41016-+⨯=(元. 答:该同学购买这两种铅笔共花了16元. …………………………4分C BA CB五、解答题(本大题共 16分,第25题5分,第26题5分,第27题6分)25. 解:这五个数的和能为426. 原因如下:设最小数为x ,则其余数为10,12,14,20x x x x ++++. ………………1分 由题意得,(10)(12)(14)(20)426x x x x x ++++++++=. ………………3分 解方程得, x =74. …………………………4分 所以这五个数为74,84,86,88,94. …………………………5分26. (1)解:(-2)☆32232(2)3(2)32=-⨯+⨯-⨯+-=-. …………………………1分(2)解:2111133238(1)2222a a a a a ++++=⨯+⨯⨯+=+☆. ……………………2分解得, 3.a = …………………………3分(3)解:由题意222222242m x x x x =+⨯+=++,21113234444n x x x x =⨯+⨯⨯+=, 所以 2220m n x -=+>.所以 m n >. …………………………5分27.(1)40°. …………………………1分(2)解:因为∠BOD =∠BOC+∠COD=10°+30°=40°,因为ON 平分∠BOD , 所以∠BON =11402022BOD ∠=⨯=. 因为∠AOC =∠BOC+∠AOB=10°+50°=60°, 因为OM 平分∠AOC , 所以∠COM =11603022AOC ∠=⨯=. 所以∠BOM =∠COM-∠BOC=30°-10°=20°.所以∠MON =∠MOB+∠BON=20°+20°=40° . …………………………4分(3)12αβ+() 或11802αβ-+(). …………………………6分2118(1)()28(1)()8(1)8.22a a a +⨯-+⨯+⨯-++=③ 指导背诵这段话。
2014-2015学年北京市海淀区初一第一学期期末数学试题(含答案)

海淀区七年级第一学期期末练习数学2015.1班级姓名成绩一.选择题(本大题共30分,每小题3分)在下列各题的四个备选答案中,只有一个是正确的.请将正确选项前的字母填在表格中相应的位置.题号 1 2 3 4 5 6 7 8 9 10 答案1.-A . 2B .21-C .21D .-22.全面贯彻落实“大气十条”,抓好大气污染防治,是今年环保工作的重中之重.其中推进燃煤电厂脱硫改造15000 000千瓦是《政府工作报告》中确定的重点任务之一.将数据15 000 000用科学记数法表示为A .15×106B . 1.5×107C .1.5×108D .0.15×108 3.下列各式结果为正数的是A .22--()B .32-()C .2--D .2--()4.下列计算正确的是A .2527a a a +=B .523a b ab-=C .523a a -=D .3332ab ab ab -+=5.如图,把原来弯曲的河道改直,A ,B 两地间的河道长度变短,这样做的道理是 A .两点确定一条直线 B .两点确定一条线段 C .两点之间,直线最短 D .两点之间,线段最短BA6.从三个不同方向看一个几何体,得到的平面图形如图所示,则这个几何体是A .圆柱B .圆锥C .棱锥D .球7.若2是关于x 的方程112x a +=-的解,则a 的值为 A .0B .2C .2-D .6-8.有理数a ,b 在数轴上的位置如图所示,则下列各式成立的是A .b -a >0B .-b >0C .a >-bD .-ab <0 9.已知33x y -=,则53x y -+的值是 A .8B .2C .2-D .8-10.已知线段AB =6cm ,若M 是AB 的三等分点,N 是AM 的中点,则线段MN 的长度为 A .1cmB .2cmC .1.5cmD .1cm 或2cm二.填空题(本大题共24分,每小题3分) 11.比较大小:2-3-(填“>”,“<”或“=”). 12.写出一个以1为解的一元一次方程. 13.若=2040α∠′,则α∠的补角的大小为.14.商店上月收入为a 元,本月的收入比上月的2倍还多5元,本月的收入为元(用含a 的式子表示).15.若22(3)0a b -++=,则2a b -的值为_____________.16.将一副三角板如图放置,若=20AOD ∠︒,则BOC ∠的大小为____________.0 ba17.已知关于x 的方程7kx x =-有正整数解,则整数k 的值为.18.有一组算式按如下规律排列,则第6个算式的结果为________;第n 个算式的结果为_________________________(用含n 的代数式表示,其中n 是正整数).1 = 1 (-2) + (-3) + (-4) = -9 3 + 4 + 5 + 6 + 7 = 25 (-4) + (-5) + (-6) + (-7) + (-8) + (-9) + (-10) = -49 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 = 81…… 三.解答题(本大题共18分,第19题6分, 第20题各4分,第21题各8分) 19.计算:(1)12(18)(7)15--+--;(2)()()2316821⎪⎭⎫⎝⎛-÷-+-⨯⎪⎭⎫ ⎝⎛-.20.如图,平面上四个点A ,B ,C ,D .按要求完成下列问题: (1)连接AD ,BC ;(2)画射线AB 与直线CD 相交于E 点;(3)用量角器度量得∠AED 的大小为_________(精确到度).B A21.解方程:(1)2(10)6x x x -+=;(2)12324x x+-=+.四.解答题(本大题共12分,每小题4分)22.先化简,再求值:()()a a a a a 3225222---+,其中5-=a .23. 点A ,B ,C 在同一直线上,AB =8,AC : BC =3 : 1,求线段BC 的长度.24.列方程解应用题:甲种铅笔每支0.4元,乙种铅笔每支0.6元,某同学共购买了这两种铅笔30支,并且买乙种铅笔所花的钱是买甲种铅笔所花的钱的3倍,求该同学购买这两种铅笔共花了多少钱?五.解答题(本大题共16分,第25题5分,第26题各5分,第27题各6分)25.如图,将连续的偶数2,4,6,8,10,…排成一数阵,有一个能够在数阵中上下左右平移的T 字架,它可以框出数阵中的五个数.试判断这五个数的和能否为426,若能,请求出这五个数,若不能,请说明理由.26. 用“☆”定义一种新运算:对于任意有理数a 和b ,规定a ☆b =22ab ab a ++. 如:1☆3=2132131⨯+⨯⨯+=16. (1)求(-2)☆3的值;(2)若(12+a ☆3)☆(-12)=8,求a 的值; (3)若2☆x =m ,1()4x ☆3=n (其中x 为有理数),试比较m , n 的大小.27.如图1,AOB=α∠,COD β∠=,OM ,ON 分别是∠AOC ,∠BOD 的角平分线. (1)若∠AOB =50°,∠COD =30°,当∠COD 绕着点O 逆时针旋转至射线OB 与OC 重合时(如图2),则∠MON 的大小为______________;(2)在(1)的条件下,继续绕着点O 逆时针旋转∠COD ,当∠BOC =10°时(如图3),求∠MON 的大小并说明理由;(3)在∠COD 绕点O 逆时针旋转过程中,∠MON =__________________________.(用含αβ,的式子表示).图3N MDCB OA图2NMD(C )B OA图1N M DCB O A海淀区七年级第一学期期末练习数 学参考答案及评分标准2015.1说明: 合理答案均可酌情给分,但不得超过原题分数 . 一、选择题(本大题共30分,每小题3分)二、填空题(本大题共24分,每小题3分)11.> 12.x =1(答案不唯一) 13.15920'︒ 14.(2a +5) 15.8 16.160︒ 17.0或6 18.-121; 12(1)(21)n n +-- (第一个空1分,第二个空2分)三、解答题(本大题共18分,第19题6分,第20题4分,第21题8分) 19.(1)解:原式1218715=+--30715=--=8. ………………………………3分(2)解:原式=4(6)9+-⨯ ………………………………2分 =-50. ………………………………3分 20.(1)图略; ………………………………1分 (2)图略; ………………………………3分 (3)30︒ (误差1︒不扣分). ………………………………4分 21.(1)解:原方程可化为2106x x x --=.………………………………2分 510x =-.………………………………3分2x =- . ………………………………4分 (2)解:原方程可化为2(1)12(2)x x +=+-. ………………………………2分2214x x +=-. 312x = .4x =. ………………………………4分四.解答题(本大题12分,每小题4分)22.解:原式2225226a a a a a =+--+ ………………………………1分244a a =+. ………………………………2分当5a =-时,原式24(5)45=⨯--⨯………………………………3分10020=-80=. ………………………………4分23.解:由于AC : BC =3 : 1,设BC x =,则3.AC x = 第一种情况:当点C 在线段AB 上时,AC BC AB +=.因为 AB =8,所以 38.x x += 解得 2.x =所以 2.BC = ………………………………2分第二种情况:当点C 在AB 的延长线上时,.AC BC AB -=因为 AB =8, 所以 38.x x -= 解得 4.x =所以 4.BC = …………………………4分综上,BC 的长为24或.24.解:设该同学购买甲种铅笔x 支,则购买乙种铅笔(30-x )支. ………………1分根据题意可列方程 0.630)30.4x x -=⨯(. …………………………2分 解得 x = 10. …………………………3分则 0.63010)0.41016-+⨯=(元. 答:该同学购买这两种铅笔共花了16元. …………………………4分C BA CB五、解答题(本大题共 16分,第25题5分,第26题5分,第27题6分)25. 解:这五个数的和能为426. 原因如下:设最小数为x ,则其余数为10,12,14,20x x x x ++++. ………………1分 由题意得,(10)(12)(14)(20)426x x x x x ++++++++=. ………………3分 解方程得, x =74. …………………………4分 所以这五个数为74,84,86,88,94. …………………………5分26. (1)解:(-2)☆32232(2)3(2)32=-⨯+⨯-⨯+-=-. …………………………1分(2)解:2111133238(1)2222a a a a a ++++=⨯+⨯⨯+=+☆. ……………………2分解得, 3.a = …………………………3分(3)解:由题意222222242m x x x x =+⨯+=++,21113234444n x x x x =⨯+⨯⨯+=, 所以 2220m n x -=+>.所以 m n >. …………………………5分27.(1)40°. …………………………1分(2)解:因为∠BOD =∠BOC+∠COD=10°+30°=40°,因为ON 平分∠BOD , 所以∠BON =11402022BOD ∠=⨯=. 因为∠AOC =∠BOC+∠AOB=10°+50°=60°, 因为OM 平分∠AOC , 所以∠COM =11603022AOC ∠=⨯=. 所以∠BOM =∠COM-∠BOC=30°-10°=20°.所以∠MON =∠MOB+∠BON=20°+20°=40° . …………………………4分(3)12αβ+() 或11802αβ-+(). …………………………6分2118(1)()28(1)()8(1)8.22a a a +⨯-+⨯+⨯-++=3、讨论加点词的作用:1)“我感到一股生命的力量在我手中跃动。
海淀区2014-2015八年级英语期末试题及答案-八年级英语答案.doc

海淀区八年级第一学期期末练习英语参考答案及听力录音材料2015. 1听力理解(共26 分)一、听对话选择与对话内容相符的图片。
(共 4 分,每小题 1 分)1.B2. B3. C4. A二、听对话或独白,选择最佳选项。
(共12 分,每小题 1 分)5. C6. A7. B8. C9. C 10. B 11. A 12. C 13. A 14. C 15. A 16. B三、听对话,记录关键信息。
(共10 分,每小题 2 分)17. food 18. front 19. Use 20. 3/three 21.fruit知识运用(共20 分)四、单项填空(共10 分,每小题 1 分)22.C 23. A 24. D 25.B 26.B 27.A 28. D 29. B 30. C 31. D五、完形填空(共 10 分,每小题 1 分)32.A 33. D 34. B 35. C 36. A 37.B 38.D 39. C 40.B 41. A阅读理解(共36 分)六、阅读理解(共 20 分,每小题 2 分)42. D 43. C 44. A 45. C 46.A 47.B 48. A 49. B 50. D 51.C七、阅读短文,还原句子。
(共 8 分 , 每小题2 分)52. A 53. E 54. C 55. B八、阅读短文,回答问题。
(共 8 分,每小题 2 分)56.People love a famous person too much. / Loving a famous person too much.57.Yes. / Yes, they do.58.They will probably feel more lonely and worried.59.Don't love a famous person too much.书面表达(共18 分)九、完成句子(共 8 分,每小题 2 分)60.keep61.good at62.play a part /role63. If you have ( any ) problems/ questions / a problem /question十、文段表达(共 10 分)64.A new term means that all of us have the chance to start over again. After the relaxing winter vacation, it ’s time to make new term ’s resolutions to help me be better.My first resolution is about improving relationships with my family and friends. I am going tospend more time with my family. Maybe we can take up a new hobby together! Doing more things together with my family will make my family happy. I am also going to help my friends more. For example, I can help them with their English. Helping my friends will show them that I care about them. Another one is about how to do better at school. I am going to read more books in English. That is going to help me learn more English words. Besides, reading is fun.My resolutions are promises to myself. I believe I can be anything I want if I try my best.附1:书面表达评分标准:请先根据文章整体内容和语言表达确定档次,然后根据语言质量在该档次内评出分数。
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海淀区高三年级第一学期期末练习英语试题2015.121. My normal monthly emails to and ______ pen pals have disappeared with my tight schedule.A. inB. forC. fromD. through22. - Have you heard about the shark attack accident at the SeaWorld show?- Yea, how horrible! A trainer ______ in front of the audience.A. had been killedB. has been killedC. was killedD. is killed23. The Subway Line 16 ______ in Beijing is planned to open this year.A. being builtB. buildingC. builtD. to build24. This room isn’t actually ______ I wanted when I made my reservation.A. whatB. whereC. whichD. whether25. My boss is very generous, and he is ______ generous when we get a big order.A. veryB. mostC. onlyD. rather26. The spread of the Ebola virus in Nigeria is believed ______ by August, 2014.A. to be controlledB. to have been controlledC. to controlD. to have controlled27. We have an adviser on hand in this activity ______ you have any worries or problems.A. whenB. now thatC. thoughD. in case28. - Do I have to bring my camera tomorrow afternoon?- I think so. We ______ the Botanical Garden then.A. will be visitingB. are visitingC. have visitedD. visit29. - The zookeeper was really annoyed with me.- How could he have been if you ______ stones at the animals?A. didn’t throwB. don’t throwC. hadn’t thrownD. haven’t thrown30. Every Monday, my English teacher would cheerfully ask me ______ my weekend had been.A. thatB. ifC. whatD. how31. With doubts ______ through my mind, I felt it necessary to carry out a research.A. to runB. runC. runningD. having run32. - You seem busy these days.- Yes. I’m writing a story.You know, it’s really not easy to write ______ with attractive plots.A. thisB. oneC. itD. that33. According to the latest BBC news, a five-year-old boy from England ______ the youngest computer specialist in the world.A. becameB. becomesC. had becomeD. has become34. The glorious moment would live in my mind ______ our football team won the championship.A. whenB. whereC. thatD. which35. - Tom, why don’t we help our son work on his papers?- We’ve already done more than we ______. He is on his own this time.A. wouldB. shouldC. couldD. might完型填空He Had a GoIt was a cool spring evening in Melbourne, Australia. I drove to my boxing gym for a Friday night training session. After ______ (36) up, I started training. Then I noticed a tall and slimyoung man walking through the doors. There was something about him that caught my ______ (37).Before long, I realized that he might have a mental illness. Having volunteered for mental illness support groups, I really ______ (38) his problems when I looked at him.He paid for the session, put on a pair of gloves and then started hitting the punching bags. I watched him from a ______ (39) and wanted to help him to punch straighter and better. Then I felt it was best to leave that up to the trainer who was ______ (40) watching him.After a few seconds of punching the bag, he stopped and started staring at the ______ (41). The trainer went up to him and ______ (42) to help him. It was almost like he woke up from a dream. He ______ (43) eye contact with the ceiling at once.Then the bell rang and it was the end of the round. ______ (44) rounds we are required to do five pushups (俯卧撑), ______ (45) all the boys that were training that night did five pushups. He ______ (46) to complete his five pushups. The bell sounded again and the next round began. He punched the bags for a few seconds and then he ______ (47). This time he was staring at the walls which were decorated with boxing posters.It was clear to me that he could not ______ (48) for long.When I finished training, I decided to go up to him and offer him my help. I held the bag for him and asked him to punch. He ______ (49) the bag a few times and then stopped again.I smiled at him and asked, “Do you like boxing?”He replied with a very shy ______ (50) on his face, “Yes, boxing is alright.”What else could I do than ______ (51) this man and his willingness to give it a go? Most people put self-imposed (自我强加的) ______ (52) on their lives and stop themselves from having a go. I kept thinking about this man while admiring him for even turning up to a boxing gym, let alone training at what appeared to be his ______ (53).There are many lessons to learn from this man. What I ______ (54) admired about this man was that he had a go! That is what ______ (55) ordinariness from greatness.So what will you have a go at?36. A. lifting B. running C. warming D. going37. A. heart B. attention C. breath D. imagination38. A. experienced B. mentioned C. overcame D. understood39. A. Distance B. box C. poster D. screen40. A. still B. Even C. also D. ever41. A. bags B. Walls C. ceiling D. trainer42. A. offered B. promised C. seemed D. planned43. A. made B. broke C. kept D. avoided44. A. Before B. Through C. During D. Between45. A. For B. But C. Or D. so46. A. struggled B. Preferred C. refused D. decided47. A. slowed B. stopped C .continued D. hesitated48. A. stand B. Stay C. concentrate D. remember49. A. hit B. felt C. grasped D. watched50. A. view B. look C. sight D. scene51. A. Accept B. appreciate C. motivate D. notice52. A. targets B. burdens C. limitations D. minds53. A. worst B. fullest C. greatest D. hardest54. A. Really B. hardly C . Merely D. nearly55. A. Prevents B. protects C. Transforms D. separates阅读理解 ASummer is slipping away from me. Some days, it makes me want to cry. Other days, I feel a sense of expectation within me just thinking about fall that makes me want to burst. Tonight, all five of us were in the family room doing our own things.At this moment, my littlest kid is my number one trouble and my number one joy. He has a tooth on the way and although it’s such a tiny thing, it’s causing so much grief. I’m holding hi m a lot and I’m not going to lie. I live for his afternoon nap (小睡) so I’m able to actually get dressed and use the restroom.The big E is starting school soon. The other day, I found myself a bit depressed about the end of summer and the beginning of another school year. I looked out of our front window with eyes that were heavy and a bit teary. Then, I suddenly realized just how silly this end of summer depression of mine is. I can’t change time. But, I can change my emotions and my thoughts. I decided not to spend my final days of summer vacation walking around with a sad face. I decided to hug the last few days of summer and remind myself that before I know it, we will be back in our school routine and all will go well.This week we plan on meeting teachers. I’m taking my girl to have her nails done before her first day of kindergarten. We want t o bake a few dozen cookies. We’ll take our evening walks as usual and stay up late. And last but not least, I’ll get school cloth ready, I’ll pack lunches and write lunch notes, we’ll read“The Kissing Hand,”like we normally do, and I’ll tuck (掖好被子) my third grader and kindergartener in their little beds before the big first day.Thank you summer, you’ve been warm and wonderful, you’ve been sweet and sticky, you’ve been refreshing and exactly what we need. And your sunsets have been amazing, so thank you.56. According to Paragraph 1, the author __________.A. feels excitedB. has mixed feelingsC. feels worriedD. has bad feelings57. How will the author spend the final days of the summer vacation?A. Live a simple life.B. Stay at home and relax herself.C. Treasure the vacation.D. Walk around with a depressed face.58. From the passage, we can learn that the author __________.A. is fond of reading novelsB. has two annoying childrenC. often takes evening walksD. has no time to get dressedBEver walked to the shops only to find, once there, you’ve completely forgotten what you went for? Or struggled to remember the name of an old friend? For years we’ve accepted that a forgetful brain is as much a part of ageing as wrinkles and grey hair. But now a new book suggests that we’ve got it all wrong.According to The Secret Life of the Grown-up Brain, by science writer Barbara Strauch, when it comes to the important things, our brains actually get better with age. In fact, she argues that some studies have found that our brain hits its peak between our 40s and 60s –much later than previously thought.Furthermore, rather than losing many brain cells as we age, we retain them, and even produce new ones well into middle age. For years it’s been assumed that brain, much like the body,declines with age. But the longest, largest study into what happens to people as they age suggests otherwise.This continuing research has followed 6,000 people since 1956, testing them every seven years. It has found that on average, participants performed better on cognitive (认知的) tests in their 40s and 50s than they had done in their 20s. Specifically, order people did better on tests of vocabulary, verbal memory (how many words you can remember) and problem solving.Where they performed less well was number ability and perceptual speed – how fast you can push a button when ordered. However, with more complex tasks such as problem-solving and language, we are at our best at middle age and beyond. In short, researchers are now coming up with scientific proof that we do get wiser with age.Neuroscientists are also finding that we are happier with ageing. A recent US study found older people were much better at controlling and balancing their emotions. It is thought that when we’re younger we need to focus more on the negative aspects of life in order to learn about the possible dangers in the world, but as we get older we’ve lea rned our lessons and are sub-consciously aware that we have less time left in life: therefore, it becomes more important for us to be happy.59. Barbara Strauch probably agrees that __________.A. the young are better at handling important thingsB. people’s brains work best between their 40s and 60sC. ageing leads to the decline of the function of the brainD. wrinkles and grey hair are the only symbols of ageing60. The continuing research has found older people perform better on __________.A. vocabulary testsB. number abilityC. perceptual speedD. body balance61. People are happier with age because __________.A. they learn to value the time leftB. they know how to share feelingsC. they cannot focus on negative aspectsD. they do not realize the possible dangers62. What is the main idea of the passage?A. People get wiser with age.B. People get more forgetful with age.C. People get happier with age.D. People get more self-aware with age.CEveryone procrastinates. We put things off because we don’t want to do them, or because we have too many other things on our plates. Putting things off – big or small –is part of being human. But procrastination does have consequences. When your procrastination leaves you feeling discouraged, it is time to take action, and one of the best ways to get rid of it is to make an un-scheduled.An un-schedule is a weekly calendar of all the ways in which your time is already accounted for. You consider not only your timed commitments such as classes and meetings, but also your untimed activities such as meals, exercise, time with friends, and the like. Once you have made your un-schedule, you may be able to see your time is often filled with more activities than you realize, for instance, that you really don’t have five hours to spend writing on the night before your paper is due. Procrastinators’ views of time tend to be unrealistic, and the un-schedule can help you outline a realistic plan. By planning accordingly, you will not only get a better night’s sleep, you may also end up with a better paper.The un-schedule might also be a good way to get started on a larger project, such as a term paper or an honors paper. You may think that you have “all semester” to get the writing done, butif you really map out how much time you have available to write on a daily and weekly basis, you will see that you need to get started sooner, rather than later. In addition, the un-schedule may reveal especially busy weeks or months, which will help you budget time for long-term projects. Perhaps most importantly, the un-schedule can help you examine how you spend your time. You may be surprised at how much time you spend watching television, and decide to make a change. It’s especially important that you build time for fun activities into your un-schedule. Otherwise, you will procrastinate in order to steal time for relaxation.You can also use the un-schedule to record your progress towards your goal. Reward yourself for your small successes. Seeing what you’ve achieved wi ll help you reinforce (强化) the productive behavior, and you will feel more motivated in the following process.As you explore ways to conquer procrastination, don’t expect overnight transformation. You developed the habit over a long time; you aren’t going stop magically. But you can change the behavior, bit by bit. If you start to make an un-schedule now, you will eventually develop new habits.63. From Paragraph 2, we can know that procrastinators __________.A. usually have sleeping problemsB. tend to be unrealistic in daily lifeC. spend more time in doing exerciseD. often fail to notice untimed activities64. Which of the following statements best reflects an un-schedule?A. “Now I have more time for fun.”B. “I can start my big project later.”C. “I’ll treat myself to a movie for my progress.”D. “I’m going to have more time to finish my paper.”65. According to the writer, people need to make an un-schedule because of their __________.A. interests in doing things differentlyB. determination to try out new thingsC. inability to manage time properlyD. lack of concentration on a project66. The author writes the passage to __________.A. show concernsB. offer suggestionsC. express dissatisfactionD. make commentsDI wish documentaries, not movies. I read history books, not fiction. I use every free moment to accomplish one of the tasks on my never-ending checklist, and I am completely filled with thoughts of productivity. An hour sleeping is an hour wasted. And like the rest of 21st century America, I like it. But this fixation on productivity is increasingly destroying character and transforming men into robots.New York Times columnist David Brooks warned American University students of this cultural decline in a speech. “We cut off all things spiritual and emotional in a competitive urge to stand out”, he said, “The pressure to succeed professionally, to acquire skills, to do the things you need to do to succeed in an information age economy really became the overwhelming (难以应付的) pressure, and it sort of eclipses the thinking about character and morality.Many students happily go to college, viewing it as a next step on their rise to professional achievement. Forcing as many success-building activities into their schedules as they can, they enjoy keeping busy with little sleep. “Today’s outstanding kids are likely to spend their afternoons and weekends shuttling from one skill-improving activity to the next,” Brooks wrote in an articl e, “We fear failure more than we desire success.”A century ago, college was about character building. Today, our characters are in decline. We are experts on economics, material things and professional skills. We fail to discuss and understand relationships, emotions and all things spiritual. Philosophers Karl Popper divided the world into two categories: Clocks and Clouds. Clock problems are those that can be taken apart, examined and solved through deductive reasoning (演绎推理). Clouds cannot be taken apart. Cloud problems represent whole systems that need to be understood in a different way.“When we have a Cloud problem, we try to turn into a Clock problem,” Brooks said. And in a reason-centered culture, adding titles to one’s resume becomes a tren d. At American University, 85 percent of seniors (and 89 percent of business majors) graduate with at least one practical experience which is often helpful to a student’s future career, but can sometimes draw focus away from academics.To prevent the d eath of man’s character, Brooks urges rediscovering our human natures through falling in love. And by love he means love for a task, job, or another person. “Synchronicity is key to happiness,” he said. Rather than crazily increasing our long lists of accomplishments, we need to lose ourselves in what we do, and success will come on its own.67. From Paragraph 1, we can learn that people __________.A. are controlled by timeB. are keen on reading booksC. are changing their charactersD. are eager to achieve more68. In Paragraph 2, the underlined word “eclipses” means __________.A. deletesB. weakensC. worsensD. emphasizes69. The last paragraph mainly tells us that __________.A. love is more important than focusB. the focus on human natures countsC. more work contributes to happinessD. success comes from devotion to work.70. The purpose of this passage is to __________.A. bring awareness to character buildingB. stress the importance of productivityC. warn about the pressure to seek successD. criticize students’desire for achievements七选五Weighing the OptionsMaking decisions when sh opping is often a tough call. Even if you’re satisfied with the first dress you try on, would you go on looking for alternatives, comparing styles and prices, until literally dropped dead?Psychology researchers have studied how people make decisions and concluded there are two basic styles. “Maximizes” like to take their time and weigh a wide range of options, – sometimes every possible one –before choosing. “Satisficers” would rather be fast than thorough.__________ (71) So even if they see what would seem to meet their requirements, the y can’t make a decision until after they’ve examined every option to make sure that they’re making the best possible choice. Researchers followed 548 job-seeking college seniors at 11 schools from October through their graduation in June. They found that the maximizers landed better jobs. __________ (72)“The maximizers is kicking himself because he can’t examine every option and at some point had to just pick something,” they say. “Maximizers make best decisions and end up feeling bad about them. __________ (73)”Satisficers also have high standards, but they are happier than maximizers. Maximizers tend to be more depressed and to report a lower satisfaction with life, his research found.Faced with so many choices in our lives, we need to learn how not to waste time and energy onour decision-making._________ (74) For instance, if you’re picking a restaurant for lunch meeting, first deciding on a certain part of town or type of cuisine can narrow your options.Once you’ve arrived at a decision, stick with it. __________ (75) To limit the number of options you can set a time for decision-making. Say you are buying a new bag, you could spend an amount of time studying features, price and value – but if you give yourself only five minutes to make a decision, and there are only bags you can consider, you’ll save time. You’ll be happier with your decision, too.A. Maximizers are people who want the best.B. First of all, decrease your range of options.C. Comparing is often a must when you make a decision.D. Just accept that no decision is ever completely perfect.E. Satisficers make good decisions and end up feeling good.F. The other is to make decisions more accurately at the beginning.G. Their starting salaries were 20 percent higher but they felt worse about their jobs. WRITING 1 你的英国朋友Tom 将来你家共度除夕,你打算当天下午去地铁站接他。