2018年杭州市西湖区中考三模
杭州市西湖区中考物理三模试卷

杭州市西湖区中考物理三模试卷姓名:________ 班级:________ 成绩:________一、选择题 (共18题;共36分)1. (2分) (2020八上·九龙坡期末) 关于声的知识,下列说法正确的是()A . 超声波就是传播速度大于340m/s的声波B . 通常我们是根据音调来分辨不同人说话的声音C . 在城市道路两旁设置隔声板,是为了在声源处减弱噪声D . 利用超声波可除去人体内的结石,说明声波可以传递能量2. (2分)男同学的声音比女同学沉闷、浑厚但嗓门大,原因是男孩的()A . 声带振动频率高,振幅小B . 声带振动频率高,振幅大C . 声带振动频率小,振幅小D . 声带振动频率小,振幅大3. (2分) (2016八上·九台期中) 我们通过声音能区分不同的人,主要是依据说话人声音的()A . 音色B . 音调C . 响度D . 速度4. (2分)如图所示,将碎冰块放入易拉罐中宾过加入适量的盐,用筷子搅拌大约半分钟,测得易拉罐中冰和盐水混合物的温度低于0℃,同时会发现易拉罐的下部有白霜形成.这些白霜的形成属于物态变化中的()A . 凝固B . 凝华C . 液化D . 升华5. (2分) (2018八上·泰州期中) 如图所示,乙容器内盛有水,甲容器盛有下表所列的一种液体。
在一个标准的大气压下,对甲容器的底部持续加热,最终发现乙容器内的水沸腾了。
则甲容器内盛的液体是()A . 液态氨B . 酒精C . 水D . 煤油6. (2分)(2017·松北模拟) 某中学生的信息档案中,错误的信息是()A . 身高1.68mB . 质量50kgC . 体温37℃D . 心率70次/s7. (2分)如图所示,有一束光线射入杯中,在杯底形成光斑,逐渐往杯中加水,光斑将()A . 向右移动B . 向左移动C . 不动D . 无法判断8. (2分)在图所示的光现象中,属于光的反射现象的是()A .B .C .D .9. (2分) (2017八上·滦南月考) 小明同学在做凸透镜成像实验时,先在光屏上得到烛焰缩小的像,保持透镜位置不变,对调蜡烛和光屏的位置,结果在光屏上形成()A . 倒立缩小的实像B . 正立放大的虚像C . 倒立放大的实像D . 不能成像10. (2分)一名同学用天平测物体的质量,在调节天平时,他把天平放在水平工作台上后,忘记了移动游码,当时游码处在0.2g的位置,就调节平衡螺母,使横梁平衡,测量时物体放在左盘,在右盘放入50g、10g、5g的砝码各一个,指针正好指在分度盘的中央刻度线,则被测物体的质量是()A . 65gB . 65.2gC . 64.8gD . 无法确定11. (2分)甲、乙两实心金属块,m甲=4m乙, V甲=2V乙,则甲的密度是乙密度的()A . 0.25倍B . 0.5倍C . 2倍D . 4倍12. (2分)我国发射的“神州Ⅲ号”载人宇宙飞船完成科学实验任务后,在内蒙古准确返回,成功着陆。
浙江省杭州市西湖区2018年中考数学模拟试题4 精品

浙江省杭州市西湖区2018年中考数学模拟试题4考生须知:1. 本试卷分试题卷和答题卷两部分. 满分120分, 考试时间100分钟.2. 答题时, 应该在答题卷指定位置填写校名, 姓名,填涂考试号.3. 所有答案都必须做在答题卷标定的位置上, 请务必注意试题序号和答题序号相对应.试题卷一. 仔细选一选(本题有10个小题,每小题3分,共30分)下面每小题给出的四个选项中,只有一个是正确的。
注意可以用多种不同的方法来选取正确答案。
1. 反比例函数xm y 12+=的图象在 ( ) A. 第一、三象限 B. 第一、四象限 C. 第一、二象限 D. 第三、四象限 2. 抛物线42+=x y 的顶点坐标是A.(4,0)B. (-4,0)C.(0,-4)D.(0,4) 3.在Rt△ABC 中,∠C=90°,当已知∠A 和a 时,求c ,应选择的关系式是( )A . sin A a c =B .cosA a c =C .tan A c a =⋅D .tan Aac =(第5题)10 1520 学生数(人)518 10 4 锻炼时间(h )5.为了解初三学生的体育锻炼时间,小华调查了某班45名同学一周参加体育锻炼的情况,并把它绘制成折线统计图。
那么关于该班45名同学一周参加体育锻炼时间的说法错误的是( )A .众数是9B .中位数是9C .平均数是9D .锻炼时间不低于9小时的有14人6.如图所示的正方体,用一个平面截去它的一个角,则截面不可能是( )A .锐角三角形B .等腰三角形C .等腰直角三角形D .等边三角形8.设0<k <2,关于x 的一次函数2(1)y kx x =+-,当1≤x ≤2时的最大值是( ) (A )22k - (B )1k - (C )k (D )1k + 9.如图,边长为a 的六角螺帽在桌面上滚动(没有滑动)一周,则它的中心O 点所经过的路径长为( ) A .6a B .5aC .2a π Dπ10.如图,ABCD 、CEFG 是正方形,E 在CD 上,直线BE 、DG 交于H , BD 、AF 交于M ,当E 在线段CD (不与C 、D 重合)上运动时,下列四个结论:① BE ⊥GD ;② AF 、GD 所夹的锐角为45°;③;④ 若BE 平分∠DBC ,且HE ·HB=4-ABCD 的面积为4。
浙江省杭州市西湖区2018年中考数学模拟试题3 精品

浙江省杭州市西湖区2018年中考数学模拟试题3满分120分, 考试时间100分钟.一、仔细选一选(本题有10个小题,每小题3分,共30分) 1.下列计算正确的是( ) A .347a a a +=B .347a a a ⋅=C .347()a a =D .632a a a ÷=2.温家宝总理强调,“十二五”期间,将新建保障性住房36 000 000套,用于解决中低收入和新参加工作的大学生住房的需求.把36 000 000用科学记数法表示应是( ) A. 3.6×118 B. 3.6×118 C. 36×118D. 0.36×1183. 如图,已知△ABC 中,∠ABC=45°,F 是高AD 和BE 的交点,CD=4,则线段DF 的长度为( ) A.B . 4 C.D.第3题图 第4题图 第5题图 第7题图4.如图,一束光线从y 轴上点A (0,1)发出,经过x 轴上点C 反射后,经过点B (6,2),则光线从A 点到B 点经过的路线长度为( )A .6 B..85.用四个全等的矩形和一个小正方形拼成如图所示的大正方形,已知大正方形的面积是144,小正方形的面积是4,若用x ,y 表示矩形的长和宽(x >y),则下列关系式中不正确的是( ) A. x+y=12 B. x -y=2. C. xy=35 D. x 2+y 2=1446.已知1212,1212+--=+-=--xx x x N M ,x 为整数,则N M ,的大小关系是( ) A. N M > B. N M = C. N M < D. 无法确定7.如图,△MBC 中,∠B=90°,∠C=60°,MB=,点A 在MB 上,以AB 为直径作⊙O 与MC 相切于点D ,则CD 的长为( )A. 2B. 3C. 2D. 3 8.如图,A 、B 是双曲线 y =kx (k >0) 上的点, A 、B 两点的横坐标分别是a 、2a ,线段AB 的延长线交x 轴于点C ,若S △AOC =6.则k 的值为( ) A.1 B.2 C.4 D.无法确定9.Rt △ABC 中,∠C=90°,c b a 、、分别是∠A 、∠B 、∠C 的对边,那么c 等于 ( )第15题图A.cos sin a A b B +B.sin sin a A b B +C.B b A a sin sin + D.BbA a sin cos + 10.如图,P 是菱形ABCD 的对角线AC 上一动点,过P 垂直于AC 的直线交菱形ABCD 的边于M 、N 两点,设AC=2,BD=1,AP=x ,则△AMN 的面积为y ,则y 关于x 的函数图象的大致形状是( )A. B. C. D. 二、认真填一填(本题有6小题,每小题4分,共24分) 11.多项式324x x -+在实数范围进行因式分解可得 . 12.如图,已知△ABC 是等边三角形,点B 、C 、D 、E 在同一直线上,且CG=CD ,DF=DE ,则∠E = 度.13.用一张半径为24cm 的扇形纸片做一个如图所示的圆锥形小丑帽子侧面(接缝忽略不计),如果做成的圆锥形小丑帽子的底面半径为10cm ,那么这张扇形纸片的面积是 . 14.线段a x y +-=21(1≤x ≤3),当a 的值由-1增加到2时,该线段运动所经过的平面区域的面积为 .15.如图,若干全等正五边形排成环状.图中所示的是前3个五边形,要完成这一圆环还需要 个五边形.16.如图,有n+1个等腰梯形,上底、两腰长皆为1,下底长为2,且下底均在同一直线上,设四边形P 1M 1N 1N 2面积为S 1,四边形P 2M 2N 2N 3的面积为S 2,……,四边形P n M n N n N n+1的面积记为S n ,则S n = .三、全面答一答(本题有7小题,共66分) 17.计算(本小题满分6分) (1) 计算:-(1-)2018-(3.14-π)0×2sin30º+2-1×4(2)先化简,再求值:(2-a )(211--a a ),其中2=a18.(本小题满分8分)如图在8×8的正方形网格中建立直角坐标系,第12题图第16题图M 4M 3M 2M 1第10题图第13题图已知A (2,4),B (4,2).C 是第一象限内的一个格点,由点C 与线段AB 组成一个以AB 为底,且腰长为无理数的等腰三角形.(1)填空:C 点的坐标是_ _____,△ABC 的面积是___________;(2)在图上将△ABC 绕点C 旋转180º得到△A 1B 1C 1,写出点A 1、B 1的坐标,以及在旋转过程中线段AB 所扫过的面积.20.(本小题满分10分)如图,一架飞机由A 向B 沿水平直线方向飞行,在航线AB 的正下方有两个山头C 、D .飞机在A 处时,测得山头C 、D 在飞机的前方,俯角分别为60°和30°.飞机飞行了6千米到B 处时,往后测得山头C 的俯角为30°,而山头D 恰好在飞机的正下方.求(1)求B 、C 的距离,(2)求山头C 、D 之间的距离.21.(本小题满分10分)我市组织10辆汽车装运完A 、B 、C 三种不同品质的水果共100吨到外地销售,按计划10辆汽车都要装满,且每辆汽车只能装同一种水果,根据下表提供的信息,解答以下问题:(1)设装运A 种水果的车辆数为x ,装运B 种水果的车辆数为y,求y 与x 的函数关系式; (2)如果装运每种水果的车辆数都不少于2辆,那么车辆的安排方案有几种? (3)若要使此次销售获利最大,应采用哪种安排方案?并求出最大利润的值.22.(本小题满分12分)如图,在梯形ABCD 中,AD ∥BC ,AD=3,DC=5,AB=24,∠B=45°. 动点M 从B 点出发沿线段BC 以每秒2个单位长度的速度向终点C 运动;动点N 同时从C 点出发第18题图C第20题图备用图沿线段CD 以每秒1个单位长度的速度向终点D 运动.设运动的时间为t 秒. (1)求BC 的长.(2)当MN ∥AB 时,求t 的值. (3)试探究:t 为何值时,△MNC 为等腰三角形.23.(本小题满分12分)如图,在平面直角坐标系中,O 是坐标原点,直线943+-=x y 与x 轴,y 轴分别交于B ,C 两点,抛物线c bx x y ++-=241经过B ,C 两点,与x 轴的另一个交点为点A ,动点P 从点A 出发沿AB 以每秒3个单位长度的速度向点B 运动,运动时间为t (0<t <5)秒. (1)求抛物线的解析式及点A 的坐标;(2)以OC 为直径的⊙O ′与BC 交于点M ,当t 为何值时,PM 与⊙O ′相切?请说明理由. (3)在点P 从点A 出发的同时,动点Q 从点B 出发沿BC 以每秒3个单位长度的速度向点C 运动,动点N 从点C 出发沿CA 以每秒5103个单位长度的速度向点A 运动,运动时间和点P 相同. ①记△BPQ 的面积为S ,当t 为何值时,S 最大,最大值是多少?②是否存在△NCQ 为直角三角形的情形,若存在,求出相应的t 值;若不存在,请说明理由.2018年数学中考模拟卷参考答案及评分标准(第三套)第22题图(3分)二、认真填一填(本题有6小题,每小题4分,共24分)11.)2)(2(2-+-x x x ; 12. 15; 13. 240π; 14. 6; 15. 7;3121n n ++三、全面答一答(本题有7小题,共66分)19.(本小题满分8分)解:(1)∵点(3,9)都在一次函数kx y =的图象和二次函数2ax y =的图象上 ∴,39k = 239∙=a∴3=k , 1=a ………2分(2)P (小胜得奖品)=92,P (小阳得奖品)=91;(3)52+=x y . ………3分20.(本小题满分10分) 解 :(1)BC=33 ……4分 (2)CD=21 … 6分21.(本小题满分10分)解(1)装A 种为x 辆,装B 种为y 辆,装C 种为10-x-y 辆,由题意得:12108(10)100x y x y ++--= 102y x ∴=- ----------------3分(2)1010(102)x y x x x --=---=故装C 种车也为 x 辆.21022x x ⎧∴⎨-⎩≥≥ 解得2 4.x ≤≤ x 为整数, 2,3,4x ∴=故车辆有3种安排方案. ----------------3分22.(本小题满分12分) 解:(1)如图①,过A 、D 分别作AK BC ⊥于K ,DH BC ⊥于H ,则四边形ADHK 是矩形∴3KH AD ==.在Rt ABK △中,sin 454AK AB =︒== 2cos 45424BK AB =︒== 在Rt CDH △中,由勾股定理得,3HC =∴43310BC BK KH HC =++=++= -----------------------------------------------3分(3)分三种情况讨论:①当NC MC =时,如图③,即102t t =- ∴103t =(第22题图①) A D C B K H (第22题图②) A D C B G M NADCBMNAD CBM NH E②当MN NC =时,如图④,过N 作NE MC ⊥于E 解法一:由等腰三角形三线合一性质得()11102522EC MC t t ==-=- 在Rt CEN △中,5cos EC tc NC t -== 又在Rt DHC △中,3cos 5CH c CD == ∴535t t -= 解得258t = 解法二:∵90C C DHC NEC =∠=∠=︒∠∠,∴NEC DHC △∽△ ∴NC EC DC HC = 即553t t -= ∴258t = ③当MN MC =时,如图⑤,过M 作MF CN ⊥于F 点.1122FC NC t ==解法一:(方法同②中解法一)132cos 1025tFC C MC t ===- 解得6017t =解法二:∵90C C MFC DHC =∠=∠=︒∠∠, ∴MFC DHC △∽△ ∴FC MCHC DC= 即1102235t t -= ∴6017t =综上所述,当103t =、258t =或6017t =时,MNC △为等腰三角形-------------6分23.(本小题满分12分) 解:(1)在943+-=x y 中,令x=0,得y=9;令y=0,得x=12. ∴C(0,9),B(12,0)又抛物线经过B ,C 两点,∴⎩⎨⎧=++-=.01236,9c b c 解得⎪⎩⎪⎨⎧==.9,49c b∴949412++-=x x y(第22题图⑤)A DCBH N MF于是令y=0,得0949412=++-x x ,解得x 1=-3,x 2=12. ∴A(-3,0). …………………………4分(2)当t=3秒时,PM 与⊙O ′相切. 连接OM.∵OC 是⊙O′的直径,∴∠OMC=90°. ∴∠OMB=90°. ∵O ′O 是⊙O′的半径,O′O⊥OP ,∴OP 是⊙O′的切线. 而PM 是⊙O′的切线,∴PM=PO. ∴∠POM=∠PMO.又∵∠POM+∠OBM=90°,∠PMO+∠PMB=90°,∴∠PMB=∠OBM. ∴PM=PB. ∴PO=PB=21OB=6. ∴PA=OA+PO=3+6=9.此时t=3(秒). ∴当t=3秒,PM 与⊙O ′相切. . …………………………………………………………………… 4分(3)①过点Q 作QD ⊥OB 于点D.∵OC ⊥OB ,∴QD ∥OC.∴△BQD ∽△BCO. ∴OC QD =BCBQ. 又∵OC=9,BQ=3t ,BC=15,∴9QD =153t ,解得QD=t 59∴S △BPQ =21BP•QD= t t 22710272+-.即S=t t 22710272+- S=8135)25(10272+--t .故当25=t 时,S 最大,最大值为8135。
2018年杭州市中考模拟数学试卷(附参考答案)

2018年杭州市中考数学模拟试卷考生须知:1.本试卷分试题卷和答题卷两部分,满分120分,考试时间100分钟.2.答题时,应该在答题卷指定位置内写明校名、姓名和准考证号.3.所有答案都必须做在答题卷指定位置上,请务必注意试题序号和答题序号相对应.4.考试结束后,上交试题卷和答题卷.一. 选择题(本题有10个小题,每小题3分,共30分)下面每小题给出的四个选项中, 只有一个是正确的. 注意可以用多种不同的方法来选取正确答案.1、下列各数中,比1小的数是( ▲ )A .-1+2B .C .π-D .0(3)-2、把y y x -2分解因式是( ▲ )A .2(1)y x -B .(1)y x +C .(1)y x -D .(1)(1)y x x +-3、如图,在△ABC 中,DE∥BC,AD=6,DB=3,则的值为( ▲ )A .B .C .D .4、一只不透明的袋子中装有4个黑球、2个白球,每个球除颜色外都相同,从中任意摸出3个球,下列事件为必然事件的是( ▲ )A .至少有1个球是黑球B .至少有1个球是白球C .至少有2个球是黑球D .至少有2个球是白球5、若一个直六棱柱的三视图如图所示,则这个直六棱柱的体积为( ▲ )A . 4B .5.4C .5D .5.5 6、已知方程012=-+x x,下列说法中正确的是(▲ )A .该方程有两个相等的实数根B .该方程有两个不相等的实数根,且它们互为相反数C .该方程有一根为251+D. 该方程有一根为黄金分割比7、下列各式计算正确的有( ▲ )A.323452)2()q (q p q p p =÷B. 25)5)(5(2--=--+-a a a C. 2322(5)210x x y x x y --=-- D.2121422+=---a a a a8、已知点A (﹣1,m ),B (1,m ),C (2,m +1)在同一个函数图象上,这个函数图象可以是( ▲ )A .B .C .D .9、已知⊙O 的半径为3,△ABC 内接于⊙O ,AB=32,AC=33,D 是⊙O 上一点,且AD=3,则CD 的长应是( ▲ ) (西湖区试题改编) A .3 B .3或6 C .3 D .3或610、如图,在菱形ABCD 中,AB CF AD CE BC AG CD AH ⊥⊥⊥⊥,,,,垂足分别为点H ,G ,E ,F.若图中四边形APCQ 的面积为菱形ABCD 的四分之一,则sinB 的值( ▲ ) (课本改编) A.23 B.43 C.55 D.54二. 填空题(本题有6个小题, 每小题4分, 共24分) )要注意认真看清题目的条件和要填写的内容, 尽量完整地填写答案.11、用科学记数方法表示=0000907.0 .12、已知ab b a =+,则=--)1(1b a )( . 13、如图,直线AB ∥CD ,BC 平分∠ABD ,∠1=67°,则∠2= 度.14、为了喜迎2022年杭州承办第19届亚运会,某校举行文艺演出,组建46人的合唱队和30人的舞蹈队,现根据演出需要,从舞蹈队中抽调部分同学参加合唱队,使合唱队的人数恰好是舞蹈队人数的3倍.设从舞蹈队中抽调x 人参加合唱队,可列方程为 .(杭州市中考试题改编) 15、若关于x,y 方程组⎩⎨⎧+=--=+4633232k y x k y x 的解为⎩⎨⎧==by ax ,且3<k ,则t=a-3b 的取值范围是 .(杭州市中考试题改编) 16、如图,在平行四边形ABCD 中,AB=10,AD=15,tanA=34,点P 为AD 边上任意一点,连接PB ,将PB 绕着P 点逆时针旋转90得到线段PQ ,若点Q 恰好落在平行四边形ABCD 的边所在的直线上,则PB= . (杭州市中考试题改编)三. 解答题 (本题有7个小题, 共66分)解答应写出文字说明,证明过程或推演步骤.如果觉得有些题目有点困难,那么把自己能写出的解答写出一部分也可以. 17、(本题6分)“你记得父母的生日吗?”这是某校在九年级学生中开展主题为“感恩”教育时设置的一个问题,有以下四个选项:A .父母生日都记得;B .只记得母亲生日;C .只记得父亲生日;D .父母生日都不记得.在随机调查了(1)班和(2)班各50名学生后,根据相关数据绘出如图所示的统计图. (1)补全频数分布直方图;(2)据此推算,九年级共900名学生中,“父母生日都不记得”的学生共多少名?(3)若两个班中“只记得母亲生日”的学生占22%,则(2)班“只记得母亲生日”的学生所占百分比是多少?18、(本题8分)已知111222---++=x xx x x A (1)化简A ; (2)当x 满足不等式组,且x 为整数时,求A 的值.19、(本题8分)如图,△ABC 中,AB=AC ,D 是BC 中点,BE⊥AC 于E , (1)求证:△ACD∽△BCE;(2)若AB=5,BC=6,求CE 的长.(课本改编)20、(本题10分)如图,正比例函数x y 21-=的图象与反比例函数1k y x-=的图象分别交于M ,N 两点,已知点M (﹣2,m ). (1)求N 的坐标;(2)若1122(,),(,)A x y B x y 是反比例函数1k y x-=图像上的两点,当12y y >时,比较12,x x 的大小.(课本改编)21、(本题10分)如图,在△ABC 中,BA=BC ,以AB 为直径的⊙O 分别交AC ,BC 于点D ,E ,BC 的延长线与⊙O 的切线AF 交于点F . (1)求证:∠ABC=2∠CAF;(2)若AC=102,CE :EB=1:4,求CE ,AF 的长. (课本改编)22、(本题12分)设抛物线C 的解析式为k k kx x y )3(22++-=,k 为实数.(1)①求出该抛物线的顶点坐标(用k 表示);②说明当k 变化时,该抛物线的顶点在一条定直线上;(2)已知一直线与该抛物线中任意一条都相截,且截得的线段长都为6,求这条直线的解析式.(全国数学竞赛试题改编) 23、(本题12分)如图1,在△ABC 中,BC=4,以线段AB 为边作△ABD,使得AD=BD ,连接DC ,再以DC 为边作△CDE,使得DC=DE ,∠CDE=∠ADB=α.(1)如图2,当∠ABC=45°且α=90°时,用等式表示线段AD ,DE 之间的数量关系; (2)将线段CB 沿着射线CE 的方向平移,得到线段EF ,连接BF ,AF . ①若α=90°,依题意补全图3,求线段AF 的长; ②求出线段AF 的长(用含α的式子表示).数学参考答案及评分标准一、选择题(每小题3分,共30分)二、填空题(每小题4分,共24分)11.51007.9-⨯ 12. 1 13. 46 14.)30(346x x -=+ 15. -14<t<14 16. 28,54,8 三、解答题 (本题有7个小题, 共66分)17、解:(1)一班中A 类的人数是:50﹣9﹣3﹣20=18(人). 1分 如图所示.1分(2)(名); 2分(3)设(2)班“只记得母亲生日”的学生有x 名,依题意得:,解得x=13,∴,即(2)班“只记得母亲生日”的学生所占百分比是26%. 2分 ﹣)∵19、(1)证明:∵AB=AC,D 是BC 中点, ∴AD⊥BC,∴∠ADC=90°, 1分 ∵BE⊥AC, ∴∠BEC=90°,∴∠ADC=∠BEC, 1分 而∠ACD=∠BCE,∴△ACD∽△BCE. 2分 (2)∵△ACD∽△BCE∴AC CDBC CE = 2分 ∴536=CE ∴518=CE 2分20、解:(1)∵点M (﹣2,m )在正比例函数y=﹣21x 的图象上, ∴m=﹣21×(﹣2)=1, ∴M(﹣2,1), 2分∴根据中心对称性得到N(2,-1) 2分(2)∵反比例函数y=1k x-的图象经过点M (﹣2,1), ∴反比例函数的解析式为y=﹣x2. 1分因为A,B 是反比例函数y=2x -图像上的两点,所以有121222,y y x x --==, 1分 ∵12y y >∴1222x x ->- ∴21122()0x x x x -> 2分①当12,x x 同号时,21x x >; ②当12,x x 异号时,有12x x <. 2分 (图像法分情况讨论也好,给分)21.(1)证明:如图,连接BD . ∵AB 为⊙O 的直径, ∴∠ADB=90°,∴∠DAB+∠ABD=90°. 2分 ∵AF 是⊙O 的切线, ∴∠FAB=90°, 1分 即∠DAB+∠CAF=90°. ∴∠CAF=∠ABD. ∵BA=BC,∠ADB=90°, ∴∠ABC=2∠ABD. ∴∠ABC=2∠CAF. 2分 (2)解:如图,连接AE . ∴∠AEB=90°. 设CE=x , ∵CE:EB=1:4,∴EB=4x,BA=BC=5x ,AE=3x . 在Rt△ACE 中,AC 2=CE 2+AE 2. 即(210)2=x 2+(3x )2. ∴x=2.∴CE=2, 3分∴EB=8,BA=BC=10,AE=6. ∵tan∠ABF BAAFEB AE ==∴1086AF =. ∴AF=7.5 2分22、(1)①配方得,()k k x y 32+-=,顶点坐标为()k k 3,; 3分②设顶点坐标为(x,y ),则x=k,y=k 3,消去k 得到直线x y 3=,该抛物线的顶点在定直线x y 3=上; 3分(2)要使该直线与抛物线中任意一条相截且截得线段长都是6,则该直线必须平行于x y 3=, 2分设其为b x y +=3,考虑其与2x y =相交于点A,B ,分别过点A 作x 轴的垂线,过点B 作y 轴的垂线,交于点C ,则⎩⎨⎧+==bx y x y 32,即有032=--b x x ,解出2433,bx C B +±=, 2分所以BC=321=AB ,即有3=-C B x x ,所以有4b+3=9,解之23=b ,所以这条直线的解析式为233+=x y . 2分23、解:(1)AD+DE=4,理由是:如图1,∵∠ADB=∠EDC=∠α=90°,AD=BD ,DC=DE , ∴AD+DE=BC=4; 2分(2)①补全图形,如图2, 2分 设DE 与BC 相交于点H ,连接AE , 交BC 于点G ,∵∠ADB=∠CDE=90°, ∴∠ADE=∠BDC, 1分 在△ADE 与△BDC 中,,∴△ADE≌△BDC,∴AE=BC,∠AED=∠BCD. 2分 ∵DE 与BC 相交于点H , ∴∠GHE=∠DHC,∴∠EGH=∠EDC=90°,∵线段CB 沿着射线CE 的方向平移,得到线段EF , ∴EF=CB=4,EF∥CB, ∴AE=EF,∵CB∥EF,∴∠AEF=∠EGH=90°,∵AE=EF,∠AEF=90°,∴∠AFE=45°,∴AF==4; 2分②如图2,过E作EM⊥AF于M,∵由①知,AE=EF=BC,∴∠AEM=∠FME=,AM=FM,∴AF=2FM=EF×sin=8sin. 3分。
2018年杭州市西湖区中考模拟测试初中科学试卷

2018年杭州市各类高中招生文化模拟考试科 学考生须知:1.本科目试卷分试题卷和答题卷两部分。
满分 160分,考试时间120分钟。
2•答题前,必须在答题卷的密封区内填写姓名和考号。
3. 所有答案都必须做在答题卡标定的位置上,务必注意试题序号和答题序号相对应。
4. 本试卷可能用到的相对原子质量:H-1、C-12、0-165. 本试卷g 取10N/kg试题卷一、选择题(每小题 3分,共60分,每小题只有一个选项最符合题意) 1•下列实验操作,有明显错误的是肌加热灌体 乩检査气密性 匚滴加液体 D 一稀釋浊硫醜2•某外控型食品保鲜剂以淀粉、二氧化硅(SiO 2)为载体,吸附酒精制作而成,保鲜原理是酒精缓慢挥发,在食品周围形成一定浓度的气体保护层。
下列说法错误的是A •二氧化硅中Si 元素的化合价为+4价B •酒精挥发属于化学变化C •酒精挥发时分子之间的间隔变大D •该保鲜剂遇明火可能发生爆炸3. 2017年入冬以来,我省病毒性流感活动水平上升较快,很多人感觉今冬流感“来势汹 汹”。
下列说法正确的是A . 5.小明是一位健康的九年级男生,比较符合他的实际情况的是A .身高约178dmB .正常步行速度约 1.2m/sC .站立时对地面的压强约100PaD .游泳时受到的浮力约 5000N6 .蝴蝶兰利用其植株的叶片、茎尖等结构,经消毒处理后接种到培养基上,可培育出大 九年级《科学》试卷•第 1页(共8页)流感病毒没有细胞结构,不属于生物 流感病毒是本次流感的传染源 病毒性流感属于消化道传染病对未患流感的同学注射流感疫苗属于保护易感人群4.如下图所示的三种细胞均来自同一人体,对该三种细胞叙述正确的是神经细胞 A .都有细胞膜、细胞质、细胞核 C .形态各异,但都属于同一组织卵细胞 成熟的红细胞B .都能起到运输氧的作用 D .都由细胞分裂、分化而形成量的植株。
下列繁殖方式与培育蝴蝶兰有着本质区别的是A •用嫁接的方法培育果树优良品种 C .采用人工授粉培育杂交水稻7.下列实验不能达到实验目的的是&下列有关人体结构与功能相适应的叙述,错误的是A .肾小管细长而曲折,缠绕着大量的毛细血管,有利于血液滤过B .肺泡壁由一层上皮细胞构成,有利于气体交换C .心房与心室之间的房室瓣,能防止血液倒流回心房D .小肠内密布小肠绒毛,有利于增加小肠的吸收面积 9. 有关地球自转的叙述正确的是A .自转的方向是自东向西B .自转一周的时间为一年10. 1985年,科学家发现了一种叫做“足球烯”的超导物质,它的一个分子由 子构成,因形似足球而得名。
2018年杭州中考科学三模试卷全真模拟_20180602

2018年杭州市高中招生文化考试模拟卷一、选择题(每小题3分,共60分.每小题只有一个正确答案)1.如图所示的实验操作中正确的是()A.制取氢气B.加热液体C.测定溶液PHD.过滤2.2015年5月16日,杭州某化工有限公司发生一起二硫化碳(CS2)泄漏事故。
二硫化碳是一种易挥发、易燃、有毒、难溶于水的液体。
下列说法不正确的是()A.二硫化碳中硫的化合价为-2价,它不属于氧化物B.二硫化碳的化学性质很活泼,充分燃烧生成二氧化碳和二氧化硫C.二硫化碳是一种重要的化学试剂,应该密封保存D.二硫化碳泄露后,可用水稀释溶解而除去3.巴西曾出现寨卡病的暴发流行,寨卡病毒通过蚊虫叮咬传播,孕妇感染寨卡病毒后,其产下的婴儿会出现小头症。
下列有关说法中不正确的是()A.寨卡病毒非常微小,没有细胞结构B.最好的防治措施是消灭蚊子,属于切断传播途径C.寨卡病患者在一周左右会自愈,是因为体内T淋巴细胞产生了抗体D.孕妇感染寨卡病毒后产下的婴儿会出现小头症,可能是寨卡病毒通过母婴传播进入已成型的婴儿体内,并影响婴儿的大脑发育4. 人体血液循环系统由心脏、血管和血液组成,输送营养物质和代谢废物。
针对下列图示,描述不正确的是()A.丙图中,如果曲线代表二氧化碳的变化,则血管B表示肺泡周围的毛细血管B.乙图为某人的心动周期,在两小时内,此人的心房收缩期时间是900秒C.丙图中,如果曲线代表氧气的变化,则血管B表示组织细胞间的毛细血管D.甲图A血管表示医生给病人静脉注射时,针刺入的血管5.如图所示,在与打火机出气孔相连的导气管外部中央滴了一滴水,然后打开打火机气阀,点燃末端排出的气体,导气管外的水滴迅速变成了冰粒。
关于该装置发生的现象,说法错误的是()A.导气管外的水滴变成冰粒,是熔化现象B.气阀打开后,液态的丁烷汽化并吸热C.导气管末端的丁烷气体燃烧时,化学能转化为内能D.打火机中的丁烷是通过压缩体积的方法使它液化的6.医生在治疗感染H7N9病毒的患者过程中,发现抗病毒药物对一些重症患者很难起作用,研究证明H7N9病毒已出现变异,下列对这一现象的解释中正确的是()A.抗病毒药物选择使H7N9病毒产生了抗药性变异 B.H7N9病毒的繁殖速度越来越快C.抗病毒药物选择使有耐药变异的H7N9病毒留下来 D.抗病毒药物的质量越来越差7.据杭州网报道,2016年1月14日进行的省十二届人大常委会第二十六次会议上,审议通过了关于修改《浙江省人口与计划生育条例》的决定,并于通过当天起施行,这意味着,浙江的二孩实施细则正式出台了。
2018西湖区中考模拟卷
2018年杭州市各类高中招生文化模拟考试语文考生烦知:1.本科目試卷分試题巷和答趣卷两部分。
满分120分,考试时间120分钟2.答题前,必须在答题卷的指定区滅内填涂校名,姓名、考号、座位等有关信息。
3.所有答案都必須做在答题卷标定的位置上,务必注意題序号和答题序号相对应。
4.考试鲒束后,只上交答题卷试题卷一(30分)1.下列各句中,没有错别字且加点字的注音正确的一项是( )A.夜间滥用远光灯是人们深恶.(è)痛绝的违法行为之一,极易引发恶性交通事故。
B.很难想像他看上去一副儒雅书生的模.(mú)样,竟然是一位驰聘警界的风云人物C.“中国好字帖.(tiě)”大賽起动以来,便有许多书法爱好者踊跃访问网站参与互动。
D.徘徊.(huái)在古镇的街头巷口,游客们仿佛置身于岁月的繁华、沧桑中,感慨万分。
2.下列句子中加点的词语使用恰当的项是( )A.朗读时必需..真正理解文句的意思,否则音质再好、语言再流畅也是枉然无功,甚至还会产生歧义。
B.“一带一路”构想传承和延续了古丝綢之路的精神,被赋予了时代的新内涵,为地区和全球可持续増长开辟..了新空间。
C.一位退休女护土跪地30分钟救人的举动被热心人拍了下来,并发送到了朋友圈,很快成为了人们道听途说....的热门话题。
D.清晨,在高大茂密的树林里,我边走边学着噪鹃的叫声,很快就听见它们鳞次栉...比.的应和声,美妙极了。
3.阅读下面的文字,完成(1)(2)两小题。
①随着五水共治工作的不断推进,西潮区将开展新一轮污水“零直排”小区创建工作,以改善污水入河情况。
所谓“零直排”,指的是将原先的雨水立管进行顶部割接后作为废水管纳入污水管网,同时新增一根雨水立管,接入城市雨水管网。
②这样做是为了防止废水里的氮、磷成分引发河水营养化,进而造成水体污染为目的。
③去年,莲花东村通过这种方式,彻底实现了小区内部的雨污分流;解决了困扰已久的阳台水治理,成果明显。
2017-2018年浙江省杭州市西湖区保俶塔学校三模试题(无听力部分无答案)
2017-2018学年保俶塔三模试卷(6月)第二部分阅读理解(共两节,满分40分)第一节(共15小题,每小题2分,满分30分)阅读下列表格和短文,从每题所给的四个选项(A、B、C、D)中选出最佳选项。
AJane Eyreby Charlotte Bronte(Author)★★★★★81 customer reviewsSee all 2 formsHardcover $18.99Paperback $10.70★★★★Top Customer ReviewsBy Barnes Noble on March 18, 2017Yes, Jane Eyre is a classic, and it' s worth reading! This is a good (though long) story. I enjoyed the character development, and there are interesting comments on society. I had not read this in high school or college, so I'm glad I read it now!★★★★★By Teresa on February 20, 2014I bought this book on 9th last month, and finished it in just two days. I really learn a lot from this book. First your future is decided by yourself. Jane had a terrible childhood but it didn’t influence her future because she believe in herself and her ability to overcome. Second, if you choose to get married, do so only for love. Jane thought love is free. She'd rather be alone than marry someone who can' t win her heart.10%off before July 8, 2018 Click here to buy it!16. Barnes Noble gave his review on___________A July 8, 2018.B January 9, 2014.C. March 18, 2017D. February 20, 201417. You can find the following information on the web page EXCEPT_______A. the number of buyersB. the name of the bookC the number of customer's reviewsD the price of the book18. What did Teresa learn from the book?A Don' t be afraid to speak your mindB Some interesting comments on societyC. Beauty lies in lovers' eyesD. You decide your own future.【答案】16-18 CADBI had hidden the long black bag in the garage for the past two days. Tonight, in the dark, I would finally take it away. If everything went OK, it would be done by morning. But I had to be sure no one, not even my wife, saw me It was more difficult to get away from the party than I expected. I said that the children were tired and needed to get to bed. It was partly true. But the main reason for leaving was that I wanted to complete my plan.First I had to get the kids to sleep. That was never easy at any time and tonight it was even more difficult. The eldest one wanted to know why we left the party early. I told him 10: 30 pm was not early. As usual, I read them a bed time story, but I had to stop myself reading too quickly or they would learn my secret.Silence finally came, and feeling like a thief in the night, I went out of the house and into the garage. Taking one end, I dragged(拖曳)the bag out from its hiding place and took it into the garden. I was worried that my neighbours might see me and call the police.It was already eleven o'clock. By the light of the moon I started working, trying to make as little noise as possible. And that was not easy with a saw(锯子)and a hammer.After much effort, my work was finally completed. I looked down at my watch. It wasexactly 4: 00 am. Then went inside to have a shower and get a few hours of sleep. It wouldn't be Tong now before the kids would rush int my room and wake me up to tell me about the new tree-house Father Christmas had brought them this year.19. Why did the man feel nerious?A. He left the party too lateB. He was afraid of the darknessC. He didn’t know where the black bag wasD He worried that others would discover his secret20. The underline word "they " in Paragraph 3 refers to______A. thievesB parentsC. childrenD. neighbours21. In what order did the man do the following?a. Read the kids a storyb. Had a showerc. Worked in the moonlightd. Dragged the bag from the garagee. Went to a party.A. e-d-a-b-cB. e-a-d-c-bC. a-b-e-d-cD. a-e-d-c-b22. How would the children feel when they saw the man’s work?A Relaxed B. Excited C. Tired D. Angry【答案】19-22 DCBBCA city without cars would be very strange, right? But Venice is such a city.Venice is in the northeast of Italy. It wasn’t built on land, like Beijing or Shanghai, but on more than 110 islands. Seawater is everywhere around the city.Even so, travel isn't that difficult. The waterways have always been the best way to get around. There are 117 waterways and more than 400 bridges that can lead you where you want to go, people in Venice move from place to place by boat. They like to enjoy the scenery(风光)and cool summer nights while taking boat trips. They can talk to other people as they go along.Venice grew out of small islands in saltwater lakes when some Italians escaped from a war more than 1, 500 years ago, and built homes there.Weather makes the city special, but it is also a big problem. Sometimes tourists will have such strange experiences. One moment they walk across the Rialto Bridge, and there's nothing special. But when they come back to the bridge an hour later, it’s underwater and everyone is wearing rain shoes.Once, people used too much underground water. This made the city get lower, little by little. Now the city has gone down by 23 centimeters. Another problem is the rising seawater. The temperature has risen over the years This has made arctic(北冰洋的) ice melt(融化).Every year, high waters hit the city in autumn and winter When a lot of water comes, more than half of the city is underwater.Scientists are trying different ways to stop the city from getting even lower. The Italian government has asked some of Italy's biggest companies to build the MOST project, which was planned to be built under the seawater to op the rising water. Anyway, this project is helping solve the problem.23. According to the article, which picture shows the right position of Venice?24. The best way to travel in Venice is by water, because________A. 117 waterways can make your trip easyB. you can talk to other people while you go alongC. you can enjoy the scenery and cool summer nightsD, it is not only easy but also you can enjoy yourself better25. Which is NOT the reason why the city gets lower and lower?A. The higher temperatureB Overused underground waterC. Too many waterwaysD. The rising seawater26. The article is mainly about____of VeniceA. the waterways and bridgeB the MOST project and problemsC. the specials and problemsD. the history and scenery【答案】23-26 BACCDUmbrellas are certainly one of life’s necessary helpers. But as anyone ever caught in a heavy rain will tell you, they’re far from perfect. So, many creative designers made efforts to challenge. Here are three unusual umbrellas that can solve the rainy day problems:SenzProblem: Common umbrellas love to invert(翻转) when it’s windy.The Senz umbrella changes the found shape into the one that is long in the back and short in the front. The design is much stronger against even strong against even strong winds, and according to their tests, it won 't invert in a windy stormKazbrellaProblem: Once closed, umbrellas drip(滴水)all over everything and they need a lot of room to open up.The Kazbrella tries to solve this problem. It opens in a special way. When closed, it looks like the common umbrella upside down, but when it opens, it is similar to the common one. The designallows the wet side of the umbrella to be inside once you fold it. As a result, getting in and out of your car is not a problem. You can close Kazbrella into the smallest space of a car door, remaining dry.Rain shieldProblem: Rain can hit you from all directions.In the face of a heavy rainstorm, a little more surface area would be a big help. So the Rain Shield has been given an extension(延伸)to one side, giving the protection from the side way rain and lowering the risk of being invert. And its bendy (弯曲)design means it is easy to take.Don't you think that these umbrellas are fascinating? The good news is that you can buy Sen and Kazbrellas in London now.27. According to the first paragraph, we know that the common umbrellas__________A are useful but not perfect enoughB can only be used in a heavy rainC. can protect us very well in a heavy rainD are challenges for creative designers28.Senz will not invert because of the____A.signB.weightC.shapeD.color29. Picture_______ shows the right way to open the Kazbrella30. If you use Rain Shield in a heavy rainstorm,______A. it will not drip all over everythingB. it can protect you from sideway rainC it's easier to get in and out of the carD. it's not convenient enough to take【答案】27-30 ABAB第二节(共5小题,每小题2分,满分10分)阅读下面(第3l-35题)有关内容。
2018年浙江省杭州市西湖区中考物理模拟试卷(4月份)
2018年浙江省杭州市西湖区中考物理模拟试卷(4月份)一、选择题(每小题3分,每小题只有一个选项最符合题意)1.(★★★)小明是一位健康的九年级男生,比较符合他的实际情况的是()A.身高约178dmB.正常步行速度约1.2m/sC.站立时对地面的压强约100PaD.游泳时受到的浮力约5000N2.(★★★★)如图所示,小明分别用甲、乙两个滑轮组匀速提起重力为G的物体,且物体上升速度相同。
若不计绳重及摩擦,每个滑轮质量相同,对比两个滑轮组,下列说法正确的是()A.甲的拉力小于乙的拉力B.甲、乙绳子自由端移动的速度相等C.甲、乙的机械效率相等D.拉力甲的功率大于拉力乙的功率3.(★★★)下面的流程图是用来说明单缸四冲程汽油机的一个工作循环。
对图中甲、乙的叙述正确的是()A.甲是做功冲程B.乙冲程中活塞向上运动C.甲冲程中气体内能增加D.乙冲程中两个气门同时打开4.(★★★)在如图所示的滚摆实验中,下列说法正确的是()A.滚摆下降时,动能减小,重力势能增加B.滚摆运动时,有部分机械能转化为其它形式的能C.滚摆运动至最低点时,动能为零D.滚摆运动至最高点时,一切外力突然消失,滚摆会继续向上转动5.(★★)甲、乙是两个质量相等的容器,放在同一水平桌面上,容器底面积S 甲>S 乙;容器中装入等质量的水且液面高度相同(如图所示),若两容器底部受到水的压强分别用p 甲和p 乙表示,两容器对桌面的压强分别用p′甲和p′乙表示,则()A.p甲=p乙p′甲=p′乙 B.p甲<p乙 p′甲<p′乙C.p甲=p乙 p′甲<p′乙 D.p甲<p乙 p′甲>p′乙6.(★★★)4月2日8时,我国“天宫一号”目标飞行器已再入大气层,绝大部分器件在再入大气层过程中燃烧销毁,结束它的历史使命。
下列说法正确的是()A.这一天,杭州地区昼短夜长B.“天宫一号”坠落过程中只受到重力作用C.“天宫一号”在大气层中的燃烧现象属于自燃D.“天宫一号”坠毁时将依次通过暖层、中间层、对流层和平流层二、填空题7.(★★★)2016年5月,科学家又发现了9颗位于宜居带(适合生命存在的区域)的行星。
浙江省杭州市西湖区2018年中考数学模拟试题9 精品
浙江省杭州市西湖区2018年中考数学模拟试题9考生须知:1.本试卷分试题卷和答题卷两部分,满分120分,考试时间100分钟2.答题时,应该在答题卷指定位置内写明校名、姓名和准考证号3.所有答案都必须做在答题卷标定的位置上,请务必注意试题序号和答题序号相对应4.考试结束后,上交试题卷和答题卷试题卷一.仔细选一选(本题有10个小题,每小题3分,共30分)下面每小题给出的四个选项中,只有一个是正确的,请把正确选项前的字母填在答题卷中相应的格子内,注意可以用多种不同的方法来选取正确答案。
1. 计算 (– 1)0= ( )A. – 1B. 1C. 0D. 2 2. 一个物体的俯视图是含圆心的圆,则它的主视图是( )A. 扇形B. 四边形C. 三角形D. 弓形 3. 的算术平方根是81( )A. 9B. ±9C. 3D. ±3 4. 把一块直尺与一块三角板如图放置,若∠1=45°,则∠2的度数为( )A 、115°B 、120°C 、145°D 、135°5. 已知二次函数)1(43222<a a ax x y +-=,当自变量x 取m 时对应的函数值小于0,当自变量x 分别取m -1、m +1时对应的函数值为y 1、y 2,则y 1、y 2必满足( ) A .y 1>0,y 2>0 B .y 1<0,y 2<0C .y 1<0,y 2>0D .y 1>0,y 2<07. 给出下列命题:① 3.50万精确到百分位;② 若关于x 的方程232x mx +=-的解是正数,则m >-6;③ 等腰三角形的中线、高、角平分线互相重合;④ 平分弦的直径必垂直于这条弦;⑤ 二次函数)0(2≠++=a c bx ax y ,当x 取值1x ,2x 时(12x x ≠),函数值相等,则当x 取12x x +时,函数值为c . 其中真命题有( )A .1个 B.2个 C.3个 D.4个 8. 如图,在矩形中截取两个相同的圆作为圆柱的上、下底面,剩余的矩形作为圆柱的侧面,刚好能组合成圆柱.设矩形的长和宽分别为y 和x ,则y 与x 的函数图象大致是( )(A ) (B ) (C ) (D ) 9. 如图,在ABCD 中,过A 、B 、C 三点的圆交AD 于E ,且与CD 相切。
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2018年杭州市各类高中招生文化考试全真模拟(三模)西湖区第一部分阅读理解第一节AI once knew a man who was rich in his love for birds, and in their love for him. He lived in a grove full of all kinds of trees. He had no wife or children in his home. He was an old man with blue and kind eyes, and a voice that the birds loved.While he was at work in the grove, the birds came close to pick up the worms(蠕虫) in the fresh earth he dug up. At first, they kept their distance from him, but they soon found h e was a kind man, and would not hurt them, but liked to have them near him.They knew this by his kind eyes and voice, which tell what is in the heart. So, day by day thei r faith in his love grew in them.All the birds of the grove were soon his fast friends. They were on the watch for him, and would fly down from the green tree tops to greet him with their chirp(叽叽喳喳叫). When he had no work to do, he took bread with him, and dropped the pieces on the ground. Do wn they would dart(俯冲) on his head and feet to catch them as they fell from his hand.He showed me how they loved him, He put a piece of bread in his mouth, with one end of it out ofhis lips, Down they came like bees at a flower, and flew off with it piece by piece,When they thought he slept too long in the morning, they would fly in and_____________.They went with him to church, and while he sang his hymns in it, they sat in the trees, and sang their praises.So the love and trust of birds were a joy to the old man all his life long.16.The birds didn't get close to the old man at first because_____.A. he often hurt themB. he disliked them near himC. they knew little about himD. they got no food from him17. The underlined word "faith" in Paragraph 3 means______ in Chinese.A.承诺B.祝福C.希望D. 信任18. Which of the following is the best expression to fill in the blank in the passage?A. follow him here and thereB. call him up with their chirpC. drop pieces of bread on himD. look for worms in the house19. It can be learnt from the story that______.A. birds are human's best friendsB. everyone gets on well with animalsC. one can get love in return for giving loveD. a person who loves birds is warm-heartedBSweaty palms shaking hands and a racing heart! This is what many students experience when they take a big test. When anxiety(焦虑)kicks in students can completely lose concentration leading to pool scores. But is there any solution to such stress?The key to reducing test anxiety is writing. According to a recent report in the journal Science taking a few minutes before an exam to write about all those fears could help students perform better.The study was conducted by Professor Sian L. Beilock from the University of Chicago and his graduate student Gcrardo Ramirez.First the researchers asked 20 college students to take a maths test to get a base-lined score. Next they told the students that they could get a monetary award if they got a good score and that they were being videotaped.Before beginning the main test the researchers asked one group of students to spend 10 minutes writing down their anxieties about the test while the other group sat quietly. Both groups then took the same exam.The researchers found that students who sat quietly did 12% worse than they had on the pre-test and the ones who wrote about their anxieties improved their scores by 5%.Writing enables students to feel refreshed when facing challenging questions on the examination. However experts also warn that such a change will not cause students to become any smarter. It can only make them become more relaxed and focused.20.According to passage, what if students take an exam with anxiety?A. may get poor gradeB. pay more attentionC. be videotapedD. to study harder than before21. From the experiment we learn that______ .A. the two student groups took different testsB. they could earn money if they did wellC. they needed to finish the test withi n 10 minutesD. they were asked to relax before the test22. The result of the research has proved that____ .A. writing before a test can make you smarterB. you can become relaxed by writing before a testC. the two student groups both did well in the examD. students dislike challenging questions on the examinationC23.Lily,5years old, likes listening to some stories before going to bed, her mother will buy___.A.Good Night Sun Hello Moon B.Where the Wild Things AreC.The Petit Appetit Cookbook D.If You Give a Dog a Donut24.Who will probably show interest in The Petit Appetit Cookbook?___A.A cook in a seafood restaurant.B.A healthy mother who likes smiling.C.An artist who eats in a hurry.D.A lady with a 9-month-old baby.25.From the introduction of Where the Wild Things Are,it can be inferred that___.A.Max doesn't love his mother, nor does his motherB.Max's mother loves him, so does MaxC.Max doesn't like the wild things, so he comes back homeD.Max doesn't get along well with the wild things26.Which of the following is fit for 5-year-old Rose who is interested in pet stories?A.The Petit Appetit Cookbook B.Everyday Raw ExpressC.If You Give a Dog a Donut D.Where the Wild Things AreDNews does not always mean something completely new and different. News does not have to be something that has never happened before. We would not have much news if that were the case.What we see on TV, read in the paper, and hear on the radio, and call “the news”, are true stories about people’s unusual experiences.An unusual happening can be almost anything that is rare in a particular place at a given time. For example, a lion walking on the street is news. In an African village next to a wildlife parkwith a large lion population, the story of a lion walking on the street would be news only if the lion hurt or killed someone.Some events and experiences are new everywhere. It may be a long search for a lost child, an accident that injured a large number of people, a natural disaster such as a flood, or a visit by a famous person. It is news if someone wins a million dollars or discovers new facts about the human body. In other words, news does not have to be only sad or frightening.Another kind of news is information which helps people lead better lives. The latest science reports help people make a decision which air-conditioner would be best to buy. Stock market reports let people know which stocks are rising in value and would make big money.27. What can a piece of information be made news?A. It has to be difficult.B. It must be new.C. It may be different.D. It can be unusual.28. The examples in Para. 4 show that news may also be besides being sad or frightening.A. exciting or surprisingB. difficult or seriousC. exciting or famousD. different or common29. Which of the following information is NOT a kind of News?A. Worst day in a month for U.S stock.B. A man runs in a village every morning.C. Girl, 9, locked in cage with wolves by dad.D. A woman wins 5 million for the second time.30. The writer tries to tell us that .A. news must happen in natureB. news must be new and differentC. news must be read in the paperD. news must be unusual but true第二节(共5小题,每小题2分,满分10分)下面文章中有五处(第31-35小题)需要添加小标题,请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题,选项中有一项是多余选项。