广东省惠州市惠州一中2018-2019九年级上学期期末试卷(无听力部分 无答案)
广东省惠州市2018-2019年第一学期九年级六校联考物理试卷(无答案)
惠州市2018-2019学年度第一学期九年级六校联考物理试卷学校:_____________班级:_____________姓名:_____________ー、单项选择题(本大题7小题,部小题3分,共21分)在每小题列出的四个选项中,只有一个是正确的,请把答题卡上对应恩目所选的选项涂黑。
1.用毛皮摩擦过的橡胶棒去接触验电器金属球,发现验电器的信片张开,下列说法错误的是( )A.摩擦起电的实质是电子的转移B.箔片张开是由于同种电荷相互排斥C.箔片张开说明胶棒带电D.验电器的箔片可以用薄塑料片代替2.如图是内燃机的某个程,请看图判断此冲程中的能量转化是()A.机械能转化为化学能B.内能转化为机械能C.机械能转化为内能D.内能转化为化学能3.质量和初温都相的铝块和铁块(C铝>C铁)吸收相同的热量之后,将它们互相接触,则( )A.铝块将热量传给铁块B.铁块将热量传给铝块C.不发生热传递D.无法判断4.下列四幅图中,解释不合理的是()A.甲图,说明电流的周围存在磁场B.乙图,闭合开关后,小磁针N极将顺时针偏转C.丙图,发电机应用了磁场对电流的作用D.丁图,说明电流相同时,线圈匝数越多,电磁铁磁性越强5.如图是某种光电计数器的原理示意图,其中R1的电阻值随着光照亮度的增大而减小,R2为定值电阻.工件随传送带运动,使光源的光线间歇地照射R1,A,B两点间的信号处理系统每获得高电压时计数一次。
下列说法正确的是()A.光线照射R1时,使R1两端电压变大,信号处理系统计数B.光线照射R1时,使R1两端电压变小,信号处理系统计数C.工件挡住光线,使R1两电压变小,信号处理系统计数D.工件挡住光线,使R1两端电压变大,信号处理系统计数6.关于内能、温度和热量,下列说法正确的是()A.物体的内能跟物体的运动速度、物体的温度和物质状都有关系B.不同燃料燃烧时,放出热量越多的热值越大C.质量和初温相同的水和煤油,放出相同热量时煤油温度降低得多D.内能总是从内能多的物体向内能少的物体转移7.甲、乙两只灯泡铭牌如图所示下列说法中正确的是()A.甲灯的实际功率一定是40WB.将乙灯接入110V的电路中,它的额定功率还是60WC.两灯均正常发光时,甲灯灯丝电阻较小D.两灯均正常发光时,甲灯消耗的电能较少二、填空题(本大题6小题,每空1分,共21分)8.一台四冲程汽油机,其中_________冲程将机械能转化为内能。
2018-2019学年广东省惠州市惠城区九年级(上)期末化学试卷
2018-2019学年广东省惠州市惠城区九年级(上)期末化学试卷一、选择题(本大题14小题,每小题2分,共28分,每小题只有一个正确答案)1.(2分)下列变化属于化学变化的是()A.滴水成冰B.蜡烛燃烧C.汽油挥发D.铜丝折弯2.(2分)在使用燃气热水器时,若通风不畅会产生使人中毒的气体是()A.氧气B.氮气C.一氧化碳D.二氧化碳3.(2分)下列为“禁止燃放鞭炮”标志的是()A.B.C.D.4.(2分)下列物质的用途中,利用物质化学性质的是()A.干冰用于人工降雨B.甲烷作燃料C.石墨用于制铅笔D.铜作导线5.(2分)图示实验操作中,正确的是()A.取用液体B.点燃酒精灯C.加入锌粒D.称量氯化钠固体6.(2分)下列说法正确的是()A.石油是一种混合物B.可燃冰是可再生能源C.煤燃烧时只生成二氧化碳D.“西气东输”的“气”是指氢气7.(2分)下列事实和相应解释不一致的是()A.A B.B C.C D.D8.(2分)潜艇中船员呼吸产生的二氧化碳能通过化学反应2Na2O2+2CO2═2X+O2吸收,则X的化学式为()A.NaOH B.Na2C C.Na2O D.Na2CO39.(2分)下列有关实验现象的描述正确的是()A.红磷在空气中燃烧,产生大量白烟B.硫在空气中燃烧,发出蓝紫色火焰C.木条在氧气中燃烧,发出白光,生成二氧化碳D.铁在空气中剧烈燃烧,火星四射,生成黑色固体10.(2分)关于燃烧和灭火,下列说法正确的是()A.家用电器着火,应立即用水浇灭B.水可以用来灭火是因为水可以降低可燃物的着火点C.燃着的酒精灯不慎碰倒而着火,应立即用湿抹布扑盖D.面粉在有限的空间遇到明火会急剧燃烧,但不会发生爆炸11.(2分)下列排序正确的是()A.利用金属的年代B.元素在地壳中的含量C.碳元素的化合价D.空气中物质的含量12.(2分)下列实验不能达到实验目的的是()A.实验一验证二氧化碳密度大于空气,不支持燃烧且不能燃烧B.实验二探究燃烧需要的条件C.实验三探究质量守恒定律D.实验四测量空气中氧气所占的体积分数13.(2分)某气体可能含有H2、CO和CH4中的一种或几种组成。
广东省惠州市第一中学2018-2019学年九年级上期末考试数学试题(无答案)
惠州一中2018-2019学年第一学期九年级期末考试数学试题一、选择题(每小题3分,共30分)1.下列函数关系式中,y 是x 的反比例函数的是A.x y 3=B.13+=x yC.xy 3=D.23x y = 2.若如图所示的两个四边形相似,则α∠的度数是A.75°B.60°C.87°D.120°3.如图,在直角坐标系中,有两点A(6,3)、B(6,0),以原点O 为位似中心,相似比为,31在第一象限内把线段AB 缩小后得到线段CD,则点C 的坐标为A.(2,1)B.(2,0)C.(3,3)D.(3,1)4.在平行四边形ABCD 中,点E 是边AD 的中点,EC 交对角线BD 于点F,则EF:FC 等于A.3:2B.3:1C.1:1D.1:25.如图,AB 为⊙O 的直径,C 、D 是⊙O 上的两点,∠BAC=3O °,弧AD=弧CD.则∠DAC 等于A.70°B.45°C.35°D.25°6.如图,点O 是△ABC 的内切圆的圆心,若∠BAC=80°,则∠BOC 等于A.130°B.100°C.50°D.65°7.已知反比例函数()0>k xk y =的图象经过点()(),,、,b B a A 31则a 与b 的关系正确的是 A.b a = B.b a -= C.b a < D.b a >8.如图,AD ∥BE ∥CF ,直线21l l 、与这三条平行线分别交于点A 、B 、C 和点D 、E 、F ,已知AB=1,BC=3,DE=2,则EF 的长为A.4B.5C.6D.89.△ABC 在网格中的位置如图所示,则B cos 的值为 A.55 B.552 C.21 D.2 10.两个全等的等腰直角三角形,斜边长为2,按如图放置,其中一个三角形45°角的项点与另一个三角形的直角顶点A 重合,若三角形ABC 固定,当另一个三角形绕点A 旋转时,它的角边和斜边所在的直线分别与边BC 交于点E 、F ,设BF=,x CE=,y 则y 关于x 的函数图象大致是二、填空题(每小题4分,共24分)11.△ABC 与△DEF 的相似比为1:4.则△ABC 与△DEF 的周长比为________.12.在ABC 中,∠A 、∠B 都是锐角,若,,21cos 23sin ==B A 则∠C=________. 13.如图,在Rt △OAB 中,∠AOB=30°,将△OAB 绕点O 逆时针旋转100°到,△11B OA 则 =∠OB A 1_______°.14.已知,一个小球由地面沿着坡度2:1=i 的坡面向上前进10cm,则此时小球距离地面的高度为______cm.15.若二次函数()()12412≠+--=a a x x a y 的图象与x 轴且只有一个交点,则a 的值为__. 16.双曲线21y y 、在第一象限的图象如图所示,,xy 41=过1y 上的任意一点A,作x 轴的平行线交2y 于点B ,交y 轴于点C,若,△1=OAB S 则2y 的解析式是________.三、解答题(每题6分,共18分)17.计算:()︒-+--︒45cos 28201930tan 30π18.如图,在平面直角坐标系中,点A 、B 的坐标分别是(0,3)、(-4,0).(1)将△AOB 绕点A 逆时针旋转90°得到△AEF,点O 、B 对应点分别是E 、F,请在图中面出△AEF ;(2)以点O 为位似中心,将三角形AEF 作位似变换且缩小为原来的,32在网格内画出一个符合条件的.111F E A △19.如图,在某广场上空飘着一只气球P,A 、B 是地面上相距90米的两点,它们分别在气球的正西和正东,测得仰角∠PAB=45°,仰角∠PBA=30°,求气球P 的高度.四、解答题(每题7分,共21分)20.如图,在平面直角坐系中,过点A(2,0)的直线l 与y 轴交于点B ,,21tan =∠OAB 直线l 上的点P 位于y 轴左侧,且到y 轴的距离为1.(1)求直线l 的函数表达式(2)若反比例函数xm y =的图象经过点P,求m 的值.21.已知AB ⊥BC 于B ,CD ⊥BC 于C ,AB=4,CD=6,BC=14,点P 在BC 上移边,当以P 、C 、D 为顶点的三角形与△ABP 相似时,求PB 的长.22.某校一课外活动小组为了了解学生最喜欢的球类运动况,随机抽查了本校九年级的200名学生,调查的结果如图所示,请根据该扇形统计图解答以下问题:(1)图中x 的值是________;(2)被查的200名生中最喜欢球运动的学生有________人;(3)若由3名最喜欢篮球运动的学生(记为321A A A 、、),1名最喜欢乒乓球运动的学生(记为B ),1名最喜欢足球运动的学生(记为C )组队外出参加一次联谊活动.欲从中选出2人担任 组长(不分正副),列出所有可能情况,并求2人均是最喜欢篮球运动的学生的概率.五、解答题(每小题9分,共27分)23.如图,抛物线()0232≠++=a c x ax y 与x 轴交于A 、B 两点,与y 轴交于点C ,抛物线的对称轴交x 轴于点D ,已知点A 的坐标为(-1,0),点C 的坐标为(0,2).(1)求抛物线的解析式;(2)在抛物线的对称轴上是否存在点P ,使△PCD 是以CD 为腰的等腰三角形?如果存在,请直接写出点P 的坐标;标如果不存在,请说明理由;(3)点E 是线段BC 上的一个动点,过点E 作x 轴的垂线与抛物线相交于点F,当点E 运动到什么位置时,线段EF 的长度最大?求出线段EF 的最大值及此时点E 的坐标.24.如图,已知CE 是图圆O 的直径,点B 在圆O 上,从点E 顺时针向点C 运动(点B 不与点E 、C 重合),弦BD 交CE 于点F ,且BD=BC ,过点B 作弦CD 的平行线与CE 的延长线交于点A.(1)若圆O 的半径为2,且点D 为弧BC 的中点时,求圆心O 到弦CD 的距离;(2)当2CD DB DF =⋅时,求∠CBD 的大小;(3)若AB=2AE ,且CD=12,求△BCD 的面积。
广东省惠州市惠阳惠阳高级中学2018-2019学年九年级上学期期末数学试题(解析版)
广东省惠州市惠阳惠阳高级中学2018-2019学年九年级上学期期末数学试题一.选择题(共10小题)1. 人教版初中数学教科书共六册,总字数是978000,用科学记数法可将978000表示为()A. 978×103B. 97.8×104C. 9.78×105D. 0.978×106【答案】C【解析】【分析】【详解】解:978000用科学记数法表示为:9.78×105,故选C.【点睛】本题考查科学记数法—表示较大的数.2. 下列四个几何体中,主视图与俯视图不同的几何体是()A. B.C. D.【答案】C【解析】【分析】根据正方体的主视图与俯视图都是正方形,圆柱横着放置时,主视图与俯视图都是长方形,球体的主视图与俯视图都是圆形,只有圆锥的主视图与俯视图不同进行分析判定.【详解】解:圆锥的主视图与俯视图分别为圆形、三角形,故选:C.【点睛】本题考查简单的几何体的三视图,注意掌握从不同方向看物体的形状所得到的图形可能不同.3. 下列图形中,是中心对称图形但不是轴对称图形的是()A. B. C. D.【答案】D【解析】【分析】根据中心对称图形和轴对称图形的定义即可得.【详解】A、是中心对称图形,也是轴对称图形,此项错误B、是中心对称图形,也是轴对称图形,此项错误C、是中心对称图形,也是轴对称图形,此项错误D、是中心对称图形,但不是轴对称图形,此项正确故选:D.【点睛】本题考查了中心对称图形和轴对称图形的定义,熟记定义是解题关键.4. 下列事件为必然事件的是()A. 打开电视机,它正在播广告B. a取任一个实数,代数式a2+1的值都大于0 C. 明天太阳从西方升起D. 抛掷一枚硬币,一定正面朝上【答案】B 【解析】【分析】由题意直接根据事件发生的可能性大小进行判断即可.【详解】解:A、打开电视机,它正在播广告是随机事件;B、∵a2≥0,∴a2+1≥1,∴a取任一个实数,代数式a2+1的值都大于0是必然事件;C、明天太阳从西方升起是不可能事件;D 、抛掷一枚硬币,一定正面朝上是随机事件; 故选:B .【点睛】本题考查的是必然事件、不可能事件、随机事件的概念.注意掌握必然事件指在一定条件下,一定发生的事件.不可能事件是指在一定条件下,一定不发生的事件,不确定事件即随机事件是指在一定条件下,可能发生也可能不发生的事件. 5. 反比例函数y=﹣2x的图象在( ) A. 第二、四象限 B. 第一、三象限C. 第一、二象限D. 第三、四象限【答案】A 【解析】 【分析】 根据反比例函数y=kx(k≠0)的图象,当k >0时位于第一、三象限,在每个象限内,y 随x 的增大而减小;当k <0时图象位于第二、四象限,在每个象限内,y 随x 的增大而增大可得 【详解】∵k=-2<0,∴函数图象在二、四象限.故选A6. 如图,▱ABCD 的对角线AC ,BD 交于点O ,已知AD 8=,BD 12=,AC 6=,则OBC 的周长为()A. 13B. 17C. 20D. 26【答案】B 【解析】 【分析】由平行四边形的性质得出OA OC 3==,OB OD 6==,BC AD 8==,即可求出OBC 的周长. 【详解】四边形ABCD 是平行四边形,OA OC 3∴==,OB OD 6==,BC AD 8==, OBC ∴的周长OB OC AD 36817=++=++=.故选B .【点睛】本题主要考查了平行四边形的性质,并利用性质解题.平行四边形基本性质:平行四边形两组对边分别平行;平行四边形的两组对边分别相等;平行四边形的两组对角分别相等;平行四边形的对角线互相平分.7. 对于二次函数y=2(x﹣1)2+2的图象,下列说法正确的是()A. 开口向下B. 对称轴是x=﹣1C. 与x轴有两个交点D. 顶点坐标是(1,2)【答案】D【解析】【分析】根据题意从y=2(x﹣1)2+2均可以直接确定函数的开口方向、对称轴、顶点坐标等.【详解】解:y=2(x﹣1)2+2,(1)函数的对称轴为x=1;(2)a=2>0,故函数开口向上;(3)函数顶点坐标为(1,2),开口向上,故函数与x轴没有交点;故选:D.【点睛】本题考查的是二次函数的开口方向与x轴的交点,以及函数顶点坐标等基本性质,是函数的基础题注意掌握.8. 如图:已知CD为⊙O的直径,过点D的弦DE∥OA,∠D=50°,则∠C的度数是()A. 25°B. 40°C. 30°D. 50°【答案】A【解析】【分析】根据DE∥OA证得∠AOD=50°即可得到答案.【详解】解:∵DE∥OA,∠D=50°,∴∠AOD=∠D=50°,∴∠C =12∠AOD =25°. 故选:A .【点睛】此题考查平行线的性质,同弧所对的圆周角与圆心角的关系,利用平行线证得∠AOD =50°是解题的关键.9. 下列一元二次方程中,两个实数根之和为2的是( ) A. 2x 2+x ﹣2=0 B. x 2+2x ﹣2=0C. 2x 2﹣x ﹣1=0D. x 2﹣2x ﹣2=0【答案】D 【解析】 【分析】利用根与系数的关系进行判断即可.【详解】方程2x 2+x ﹣2=0的两个实数根之和为12-; 方程x 2+2x ﹣2=0的两个实数根之和为﹣2; 方程2x 2﹣x ﹣1=0的两个实数根之和为12; 方程x 2﹣2x ﹣1=0的两个实数根之和为2. 故选D .【点睛】本题考查了根与系数的关系:若x 1,x 2是一元二次方程ax 2+bx +c =0(a ≠0)的两根时,x 1+x 2b a=-,x 1x 2ca=. 10. 如图,在△ABC 中,D ,E 分别是AB 和AC 上的点,且DE ∥BC ,32AD BD =,DE=6,则BC 的长为( )A. 8B. 9C. 10D. 12【答案】C 【解析】 【分析】根据相似三角形的性质可得DE AD BC AB =,再根据32AD BD =,DE=6,即可得出635BC =,进而得到BC 长. 【详解】∵DE ∥BC ,∴△ADE∽△ABC,∴DE AD BC AB=,又∵32ADBD=,DE=6,∴635 BC=,∴BC=10,故选C.【点睛】本题主要考查了相似三角形的判定与性质的运用,在判定两个三角形相似时,应注意利用图形中已有的公共角、公共边等隐含条件,以充分发挥基本图形的作用.二.填空题(共6小题)11. 计算:111)2-⎛⎫- ⎪⎝⎭=______.【答案】-1.【解析】【分析】由题意根据负整数指数幂和零指数幂的定义求解即可.【详解】解:1 01 1)2-⎛⎫- ⎪⎝⎭=1﹣2=﹣1.故答案为:﹣1.【点睛】本题考查负整数指数幂和零指数幂的定义,熟练掌握实数的运算法则以及负整数指数幂和零指数幂的运算方法是解题的关键.12. 正八边形每个外角的度数和是_____.【答案】360°.【解析】【分析】根据题意利用正多边形的外角和等于360度,进行分析计算即可得出答案.【详解】解:因为任何一个多边形的外角和都是360°,所以正八边形的每个外角的度数和是360°.故答案为:360°.【点睛】本题主要考查多边形的外角和定理,熟练掌握任何一个多边形的外角和都是360°是解题的关键.13. 分解因式:a2b﹣b3=_____.【答案】b(a+b)(a﹣b)【解析】【分析】先提取公因式,再利用平方差公式进行二次因式分解.平方差公式:a2﹣b2=(a+b)(a﹣b).【详解】解:a2b﹣b3,=b(a2﹣b2)=b(a+b)(a﹣b).故答案为b(a+b)(a﹣b).14. 如图,在△ABC中,∠BAC=60°,将△ABC绕着点A顺时针旋转40°后得到△ADE,则∠BAE=_____.【答案】100°【解析】【分析】根据旋转角可得∠CAE=40°,然后根据∠BAE=∠BAC+∠CAE,代入数据进行计算即可得解.【详解】解:∵△ABC绕着点A顺时针旋转40°后得到△ADE,∴∠CAE=40°,∵∠BAC=60°,∴∠BAE=∠BAC+∠CAE=60°+40°=100°.故答案是:100°.【点睛】考查了旋转的性质,解题的关键是运用旋转的性质(图形和它经过旋转所得的图形中,对应点到旋转中心的距离相等,任意一组对应点与旋转中心的连线所成的角都等于旋转角;对应线段相等,对应角相等)得出∠CAE=40°.15. 如图,在Rt△ABC中,∠ACB=90°,点D,E分别是AB,AC的中点,点F是AD的中点.若AB=8,则EF=_____.【答案】2【解析】【分析】【详解】解:在Rt△ABC中,∵AD=BD=4,∴CD=12AB=4,∵AF=DF,AE=EC,∴EF=12CD=2,故答案为2.16. 抛物线y=﹣x2+bx+c的部分图象如图所示,已知关于x的一元二次方程﹣x2+bx+c=0的一个解为x1=1,则该方程的另一个解为x2=_____.【答案】﹣3【解析】【分析】函数的对称轴为:x=-1,由抛物线与x轴交点是关于对称轴的对称即可得到答案.【详解】解:函数的对称轴为:x=-1,其中一个交点坐标为(1,0),则另外一个交点坐标为(-3,0),故答案为-3.【点睛】本题考查了抛物线与x轴的交点,根据函数的对称性即可求解.三.解答题(共9小题)17. 解方程:x2﹣4x﹣21=0.【答案】x 1=7,x 2=﹣3. 【解析】 【分析】本题考查了一元二次方程的解法,由于-21=-7×3,且-7+3=-4,所以本题可用十字相乘法分解因式求解. 【详解】解:x 2﹣4x ﹣21=0, (x ﹣7)(x+3)=0, x ﹣7=0,x+3=0, x 1=7,x 2=﹣3.18. 先化简,后求值:2421244x x x x +⎛⎫+÷ ⎪--+⎝⎭,其中x =﹣1. 【答案】x ﹣2,-3. 【解析】 【分析】由题意先根据分式的混合运算顺序和运算法则化简原式,再将x 的值代入计算可得. 【详解】解:2421244x x x x +⎛⎫+÷ ⎪--+⎝⎭ =22(2)22x x x x +--+=x ﹣2, 当x =﹣1时,原式=﹣1﹣2=﹣3.【点睛】本题主要考查分式的化简求值,解题的关键是掌握分式的混合运算顺序和运算法则.19. 如图,E 、F 分别为线段AC 上的两个点,且DE ⊥AC 于点E ,BF ⊥AC 于点F ,若AB =CD ,AE =CF .求证:BF =DE .【答案】详见解析. 【解析】 【分析】由题意根据DE ⊥AC ,BF ⊥AC 可以证明∠DEC =∠BFA =90°,由“HL”可证Rt △ABF ≌Rt △CDE 可得BF =DE .【详解】解:证明:∵DE ⊥AC ,BF ⊥AC , ∴∠DEC =∠BFA =90°. ∵AE =CF ,∴AE+EF =CF+EF ,即AF =CE .在Rt △ABF 和Rt △CDE 中,AB CDAF CE=⎧⎨=⎩, ∴Rt △ABF ≌Rt △CDE (HL ), ∴BF =DE.【点睛】本题考查全等三角形的判定以及考查全等三角形对应边相等的性质,本题中求证Rt △ABF ≌Rt △CDE 是解题的关键. 20. 如图,△ABC . (1)尺规作图: ①作出底边的中线AD ; ②在AB 上取点E ,使BE =BD ;(2)在(1)的基础上,若AB =AC ,∠BAC =120°,求∠ADE 的度数.【答案】(1)①详见解析;②详见解析;(2)15°. 【解析】 【分析】(1)①作线段BC 的垂直平分线可得BC 的中点D ,连接AD 即可; ②以B 为圆心,BD 为半径画弧交AB 于E ,点E 即为所求.(2)根据题意利用等腰三角形的性质,三角形的内角和定理求解即可.【详解】解:(1)如图,线段AD,点E即为所求.(2)如图,连接DE.∵AB=AC,∠BAC=120°,∴∠B=∠C=30°,∵BD=BE,∴∠BDE=∠BED=12(180°﹣30°)=75°,∵AB=AC,BD=CD,∴AD⊥BC,∴∠ADB=90°,∴∠ADE=90°﹣∠ADE=90°﹣75°=15°.【点睛】本题考查作图-复杂作图,线段的垂直平分线的性质,等腰三角形的性质等知识,解题的关键是熟练掌握相关的基本知识.21. 甲乙两名同学做摸球游戏,他们把三个分别标有1,2,3的大小和形状完全相同的小球放在一个不透明的口袋中.(1)求从袋中随机摸出一球,标号是1的概率;(2)从袋中随机摸出一球后放回,摇匀后再随机摸出一球,若两次摸出的球的标号之和为偶数时,则甲胜;若两次摸出的球的标号之和为奇数时,则乙胜;试分析这个游戏是否公平?请说明理由.【答案】(1)13;(2)这个游戏不公平,理由见解析.【解析】【分析】(1)由把三个分别标有1,2,3的大小和形状完全相同的小球放在一个不透明的口袋中,直接利用概率公式求解即可求得答案;(2)首先根据题意画出树状图,然后由树状图求得所有等可能的结果与甲胜,乙胜的情况,即可求得求概率,比较大小,即可知这个游戏是否公平.【详解】解:(1)由于三个分别标有1,2,3的大小和形状完全相同的小球放在一个不透明的口袋中,故从袋中随机摸出一球,标号是1的概率为:13;(2)这个游戏不公平.画树状图得:∵共有9种等可能的结果,两次摸出的球的标号之和为偶数的有5种情况,两次摸出的球的标号之和为奇数的有4种情况,∴P(甲胜)=59,P(乙胜)=49.∴P(甲胜)≠P(乙胜),故这个游戏不公平.【点睛】本题考查的是游戏公平性的判断.判断游戏公平性就要计算每个事件的概率,概率相等就公平,否则就不公平.22. 某商场经营某种品牌的玩具,购进时的单价30元,根据市场调查:在一段时间内,销售单价是40元时,销售是600件,而销售单价每涨1元,就会少售出10件玩具.(1)若设该种品脚玩具上x元(0<x<60)元,销售利润为w元,请求出w关于x的函数关系式;(2)若想获得最大利润,应将销售价格定为多少,并求出此时的最大利润.【答案】(1)w=﹣10x2+1300x﹣30000;(2)最大利润是12250元,此时玩具的销售单价应定为65元.【解析】【分析】(1)利用销售单价每涨1元,就会少售出10件玩具,再结合每件玩具的利润乘以销量=总利润进而求出即可;(2)利用每件玩具的利润乘以销量=总利润得出函数关系式,进而求出最值即可.【详解】(1)根据题意得:w=[600﹣10(x﹣40)](x﹣30)=﹣10x2+1300x﹣30000;(2)w=[600﹣10(x﹣40)](x﹣30)=﹣10x2+1300x﹣30000=﹣10(x﹣65)2+12250.∵a=﹣10<0,∴对称轴为x=65,∴当x=65时,W最大值=12250(元)答:商场销售该品牌玩具获得的最大利润是12250元,此时玩具的销售单价应定为65元.【点睛】本题考查了二次函数的应用,得出w与x的函数关系式是解题的关键.23. 如图,直线y=2x与反比例函数y=kx(x>0)的图象交于点A(4,n),AB⊥x轴,垂足为B.(1)求k的值;(2)点C在AB上,若OC=AC,求AC的长;(3)点D为x轴正半轴上一点,在(2)的条件下,若S△OCD=S△ACD,求点D的坐标.【答案】(1)32;(2)5;(3)D(10,0)或(52,0).【解析】【分析】(1)先把A(4,n)代入y=2x,求出n的值,再把A(4,8)代入y=kx求出k的值即可;(2)设AC=x,则OC=x,BC=8﹣x,由勾股定理得:OC2=OB2+BC2,即可求出x值;(3)设点D的坐标为(x,0),分两种情况:①当x>4时,②当0<x<4时,根据三角形的面积公式列式求解即可.【详解】解(1)∵直线y=2x与反比例函数y=kx(k≠0,x>0)的图象交于点A(4,n),∴n=2×4=8,∴A(4,8),∴k=4×8=32,∴反比例函数为y=32x.(2)设AC=x,则OC=x,BC=8﹣x,由勾股定理得:OC2=OB2+BC2,∴x2=42+(8﹣x)2,x=5,∴AC=5;(3)设点D的坐标为(x,0)分两种情况:①当x>4时,如图1,∵S△OCD=S△ACD,∴12OD•BC=12AC•BD,3x=5(x﹣4),x=10,②当0<x<4时,如图2,同理得:3x=5(4﹣x),x=52,∴点D的坐标为(10,0)或(52,0).【点睛】本题考查了一次函数图像上点的特征,待定系数法求反比例函数解析式,勾股定理,坐标与图形的性质及分类讨论的数学思想,熟练掌握待定系数法及坐标与图形的性质是解答本题的关键.24. 已知:AB是⊙O的直径,BD是⊙O的弦,延长BD到点C,使AB=AC,连接AC,过点D作DE⊥AC,垂足为E.(1)求证:DC=BD;(2)求证:DE为⊙O的切线;(3)若AB=12,AD=3OD,求扇形BOD的面积.【答案】(1)见解析;(2)见解析;(3)6π【解析】【分析】(1)连接AD,根据圆周角定理得到∠ADB=90°,然后由三线合一可得结论;(2)连接OD,证明OD∥AC,得到∠ODE=90°即可;(3)根据三角函数的定义得到sinB=ADAB63=32B=60°,得到∠BOD=60°,根据扇形的面积公式即可得到结论.【详解】证明:(1)连接AD,∵AB是⊙O的直径,∴∠ADB=90°,又∵AB=AC,∴DC=BD;(2)连接OD,∵OA=OB,CD=BD,∴OD∥AC,∴∠ODE=∠CED,又∵DE⊥AC,∴∠CED=90°,∴∠ODE=90°,即OD⊥DE.∴DE是⊙O的切线;(3)∵AB=12,AD=3∴sinB=ADAB=6312=32,∴∠B=60°,∴∠BOD=60°,∴S扇形BOD=2606360π⋅⨯=6π.【点睛】本题考查了圆周角度定理、切线的判定、三角函数的应用以及扇形面积的计算,熟练掌握基础知识是解题的关键.25. 如图1,在矩形ABCD中,AB=6cm,BC=8cm,如果点E由点B出发沿BC方向向点C匀速运动,同时点F由点D出发沿DA方向向点A匀速运动,它们的速度分别为每秒2cm和1cm,FQ⊥BC,分别交AC、BC于点P和Q,设运动时间为t秒(0<t<4).(1)连接EF,若运动时间t=23秒时,求证:△EQF是等腰直角三角形;(2)连接EP,当△EPC的面积为3cm2时,求t的值;(3)在运动过程中,当t取何值时,△EPQ与△ADC相似.【答案】(1)详见解析;(2)2秒;(3)2秒或12857秒或12839秒.【解析】【分析】(1)由题意通过计算发现EQ=FQ=6,由此即可证明;(2)根据题意利用三角形的面积建立方程即可得出结论;(3)由题意分点E在Q的左侧以及点E在Q的右侧这两种情况,分别进行分析即可得出结论.新人教部编版初中数学“活力课堂”精编试题【详解】解:(1)证明:若运动时间t=23秒,则BE=2×23=43(cm),DF=23(cm),∵四边形ABCD是矩形∴AD=BC=8(cm),AB=DC=6(cm),∠D=∠BCD=90°∵∠D=∠FQC=∠QCD=90°,∴四边形CDFQ也是矩形,∴CQ=DF,CD=QF=6(cm),∴EQ=BC﹣BE﹣CQ=8﹣43﹣23=6(cm),∴EQ=QF=6(cm),又∵FQ⊥BC,∴△EQF是等腰直角三角形;(2)由(1)知,CE=8﹣2t,CQ=t,在Rt△ABC中,tan∠ACB=ABBC=34,在Rt△CPQ中,tan∠ACB=PQCQ=PQt=34,∴PQ=34t,∵△EPC的面积为3cm2,∴S△EPC=12CE×PQ=12×(8﹣2t)×34t=3,∴t=2秒,即t的值为2秒;(3)解:分两种情况:Ⅰ.如图1中,点E在Q的左侧.①∠PEQ=∠CAD时,△EQP∽△ADC,新人教部编版初中数学“活力课堂”精编试题∵四边形ABCD是矩形,∴AD∥BC,∴∠CAD=∠ACB,∵△EQP∽△ADC,∴∠CAD=∠QEP,∴∠ACB=∠QEP,∴EQ=CQ,∴CE=2CQ,由(1)知,CQ=t,CE=8-2t,∴8-2t=2t,∴t=2秒;②∠PEQ=∠ACD时,△EPQ∽△CAD,∴PQ EQ AD CD=,∵FQ⊥BC,∴FQ∥AB,∴△CPQ∽△CAB,∴PQ CQAB BC=,即68PQ t=,解得:34 PQ t=,∴348682tt t=--,解得:12857t=;Ⅱ.如图2中,点E在Q的右侧.∵0<t<4,∴点E不能与点C重合,∴只存△EPQ∽△CAD,新人教部编版初中数学“活力课堂”精编试题可得PQ EQAD CD=,即638348t t-=,解得:12839t=;综上所述,t的值为2秒或12857秒或12839秒时,△EPQ与△ADC相似.【点睛】本题是相似形综合题,主要考查矩形的性质和判定,三角函数,相似三角形的判定和性质,用方程的思想解决问题是解本题的关键.新人教部编版初中数学“活力课堂”精编试题。
广东省惠州市惠州一中2018-2019年度第一学期九年级11月份英语月考试题(无听力,无答案)
一中19届初三年级11月份测试英语试题二、、单项填空(本大题有15小题,每小题1分,共15分)在每小题的四个选项中,选出最佳答案,并将其字母编号填写在答卷相应题目的答题位置上。
( )31. --What do you think of James?-- He is_______ honest boy and he has never told________ lie to othersA. a: /B. an; aC. an;/D. a; a( )32.--I hear that the HZMB(港珠澳大桥) is the world's longest sea crossing bridge.--Yes, the _____ bridge is 55 kilometers long and _______ the Chinese people are proud of it.A. whole; all B whole; whole C. all; all D. all; whole( )33. A good student usually knows how to go over_____ in good time.A. communityB. energyC. exhibitionD. knowledge( )34. It was______ useful advice______ I decided to follow it.A so: that B. too: to C. such; that D. such a; that( )35.--Look at the sign "No Swimming". You_____ swim in this lake, because it's dangerous.--Sorry, I _______ see it.A. needn’t; didn'tB. mustn't; didn’t C can't; haven't D. shouldn’t; won't( )36. Every year, more than 70,000,000 sharks______ for their fins(鱼翅).A. were killedB. have killedC. are killedD. will kill( )37.--I wonder if my parents_____ me about this fight.--If you_____ offer to apologize to them, they will be angry with you.A will punish; don'tB punish; don't C. punish; aren't D will punish; won't ( )38.--I am considering________ an instrument to develop my interest.--Once you start, keep on instead of ______ half way.A. to learn; give upB. learning; giving upC. to lean; giving upD. learn; giving in ( )39.--I have been to Beijing. What about you, Lucy?--_______________.A. So do IB. So I doC. So have ID. So I have( )40. You should _______ your shoes before you enter the dance room.A. take offB. put offC. turn offD. see off( )41. His head is always filled_________ strange ideas when his mouth is full______ delicious food.A. of withB. with: ofC. in: ofD. of; by( )42.--Li Yong is one of the most famous and ________ host of the CCTV show. He is _______ still in our heart, though he died-- So he is. I can't nearly believe the news about his death these days.A. living; aliveB. living; livelyC. lively; aliveD. alive; living( )43. _________ exciting adventures you have experienced during the three years!A. HowB. What anC. WhatD. How a( )44.__________on the grass in the park, or it will "cry”.A. To walkB. Not to walkC. WalkD. Don't walk( )45.-- Mum, can I play your phone for a time?--__________. You haven't finished your schoolwork yet.A. That's my last wordB. No problemC. No wonderD. No way三、完形填空(本大题有10小题,每小题1分,共10分)Jenny was from Germany. Last year she spent some time travelling in India. While she was there, she stayed with her Indian friend, Leela. However, there was a language barrier (障碍) for her there . It was very __46_ for her to communicate in the new environment, which was very different from that of her own country.One day , together with Leela , Jenny went to __47__ an orphanage(孤儿院) . All the children there were very young. At first, Jenny was not sure if she could have a way to communicate with 48____. She went over to the children ____ 49____ and sat beside them. After some time, one of the children __50____ her. She felt a little relaxed and smiled back. Then she went closer to the child. She slowly put out her arms around the child and started a song in German. The child kept smiling and started repeating the words after her. The words that came from the little mouth were different from those that Jenny sang, ___51___ the rhythm was the same. Jenny went 52___ singing and the child followed her again. Wanting to join in the fun, another child went up to Jenny and started singing the rhythm. Then more children joined. They shared many smiles together.From the other side of the hall, Leela was smiling and watching them. Noticing Leela was looking at her, Jenny felt very 53____ and said: “See, I don’t have any language barriers here. We can 54____and communicate!” At that moment, she understood: We are all simply human and we have the______ to connect each other.( )46.A. nice B. dangerous C. difficult D. easy( )47.A. show B. visit C. build D. attend( )48.A. it B.them C. him D. her( )49.A. slowly B. early C. hardly D. easily( )50.A. looked at B. laughed at C. shouted at D. smiled at( )51.A.but B. or C. so D. and( )52.A.in B. out C. through D. on( )53.A. excited B. exciting C. interesting D. scared( )54.A. speak B. talk C. listen D. read( )55.A. time B. ability C. right D. question四、阅读理解(本大题有15小题,每小题2分共30分)ASenshi Secondary School Science FairFor Student in rades 7-9Dates: October 30-3Location: Sunshine Secondary School gymExplore Your World... Think Like a ScientistThe Student Science Fair offers a great way for you to put your science knowledge to use! Whether you win or not, you'll have fun at this competition.Science Fair EventsThere is plenty to do during the science fair. Of course, you will want to take a look at all of the students' projects. There will be other exciting things to see and to do as well. These events will light up the wonderful world of science. The big event is the announcement of the winners in each grade. This announcement will take place at the awards ceremony on Friday afternoon.,Several of the other events are listed below:Meet a Robot!Can people and robots work together? Learn about the latest research about Demo. Demo is a robot that can help people with jobs. Learn how Demo's large blue eyes are able to "see", watch Demo take and hold objects and move them from side to side to get a feel for their size. Then see how Demo puts the objects on a shelf. Touch Demo on the arm, watch what happens. It will respond to your touch, if you push it too hard, it will say, "Ouch!"Our Own Inventor!Make sure you're in the gym at 10 am on Friday. That's when a local inventor will give a speech about his life as an inventor. He will also show what his inventions can do. At the end of his speech, the inventor will answer some questions from the students.( )56. Sunshine Secondary School Science Fair will be held______ for students in Grades7-9.A. from October 27 to October 28B. from October 28 to October 29C. from October 29 to October 30D. from October 30 to October 31( )57. The big event during the science fair is_____________.A putting science knowledge to useB announcing the winners in each gradeC. looking at all of the students' projectsD. watching Demo carry objects( )58. What can we know from the paragraph about Demo?A Demo can help people do some simple jobsB Demo was invented by the local inventorC. Students can experience working with Demo D Demo can't see the outside world ( )59. Many students will be in the gym at 1: 00 p. m. on Friday because________.A. Demo will appear at that time. B registration will take placeC. the awards ceremony will begin.D. an inventor will give a speech( )60. We can see the passage from_____________.A. a posterBDiabetes(糖尿病) is caused by a group of metabolic disorders(新陈代谢紊乱) in which there are Type1 high blood sugar levels over a long period of time. There are three main types of diabetes: Diabetes results from the body not having enough insulin (岛为素).Type 2 Diabetes mainly happens to those who do not have enough physical exercise, eat too much Unhealthy food and get too fat and get too heavy.Gestational Diabetes is the third main form. It appears when a woman is having a baby. She willprobably get well again after the birth of the baby.Diabetes can bring serious problems. People with diabetes, especially the Type 1 will easily get thirsty and hungry, and quickly lose weight, If it is not treated, it will develop rapidly (weeks and months), and cause many long-term complication(并发症), All the complications relate to damage to blood vessel血管). For example, damage to the eyes. It is caused by damage to the blood vessels in the eyes, and results in gradual vision loss and blindness. The complications will greatly aggrandize the risk of diabetes, by which about 75% of the deaths are causedAccording to a report from the WHQ (World Health Organization) in 2015, about 415 million people have diabetes worldwide, which means 8.3% of the adults in the world have diabetes. Of all the cases, 85% to 90% are Type 2 Diabetes. That is to say, most cases of diabetes result from the unhealthy life style. Diabetes doubles a person's risk of early death. From 2012 to 2015, about 1.5 to 5 million deaths each year resulted from the disease. The global economic cost of diabetes in 2014 was around 612 billion USD.A healthy life style can help prevent diabetes. Doing a lot of physical activities and having a healthy diet will help have normal body weight. Higher levels of physical activity (more than 90 minutes per day) can reduce the risk of diabetes by 28%. Healthy diet includes foods rich in whole grains and fiber, foods with good fats from nuts, vegetable oils and fish, little sugar, and less red meat.61. Diabetes is___________.A. a serious diseaseB. a damage to blood vesselsC. an unhealthy life styleD. An unusual blood sugar level62. According to the passage, what problem can diabetes cause?A. A person gets too heavyB. A person doesn't want to eat.C. A person becomes blindD. A woman will not have a baby63. The WHO report (2015) tells us that in the worldA.8.3%0 of the people have diabetesB. 85%to 90%o of the adults have Type 2 DiabetesC. about 1.5 to 5 million people died of diabetes every yearD the economic cost of diabetes was about 612 billion USD in 201464. The underlined word "aggrandize" probably means___________ in Chinese in the passage.A. 增长B.提供C.分离D.减弱65. The best title of this passage may be___________.A. A Report on HealthB. Diabetes and Its CauseC. How to Prevent DiabetesD. Diabetes: Harm and PreventionC配对阅读。
广东省惠州市2018-2019学年都第一学期九年级六校联考测试英语试题(无听力部分 无答案)
惠州市2018-2019学年度第一学期九年级六校联考测试英语试题二.单项填空(本大题有15小题,每小题1分,共15分)在每小题的匹个选项,选出最佳答案,并将其字母编号填写在答卷相应题答题位置上31. boy who is standing over there is 8-year-old pupil.A. The, anB. A, anC. The, aD.A, an32.Cathy is from school, because she is ill.A. presentB.sufferC. absentD. different33.-Dad, can we walk the road now?-No,we . We have to wait until the light turns green.A. across, needn’tB. across, mustn’tC.though, can’tD. through, mustn't34. It was wonderful I will never forget itA. so; thatB. too; toC. such; thatD.Such a, that35. Thanks to your help, l wining the speech contestA. am worried aboutB.succeeded inC.managed toD.get tired of36. - is Hong Kong-Zhuhai-Macao Bridge?- About 55 kilometers long.A.How soonB. How longC. How oftenD. How far37. Wechat red pocket(微倍红包)is one of of sending wishes to others during the Spring Festival.A. most popular wayA. most popular wayB. most popular waysC. the more popular wayD. the most popular way38. The light is on. When you leave, pleaseA.turn it downB.turn it upC.turn it offD. turn it on39.-Ah leaving for Beijing. What about you, Betty? -A. So do IB. So I doC. So am ID. So I am40. Daniel his twin brother. They are both 175 meters tallA. taller thanB. shorter than C as tall as D. so tall as41. Recently, many people in Huizhou their heavy winter clothes, including qiuku to keep themselves warm.A. is put on B are putting on. C will put D have put on42. -I wonder if his hometown tomorrow-I m not sure. But if he returns to his hometown, I him off.A . returns; see B. will return; see C will return, will see D.returns: will see43. The 2022 Winter Olympic Games in China. I'm sure it will be a great successA. holdB. will holdC. were heldD. will be held44. -Do you know the man passed away on October 30, 2018?- Jin Yong, one of the greatest Kung Fu fiction writers in China.A who B. what C which D. whom45.-I have lost the chance to win the match.-A.That's right.B. Congratulations!C. That,s funny.D. What a pity!三、完形填空(本大题有10小题,每小题1分,共10分)A boy thought that he was the most unhappy person in the world. He thought he was 46 because almost everything bad always happened to him. So he wanted to find the key to happiness. He walked a longway and finally came to a 47. _palace. There he met the king.After learning why the boy had come, the king advised that he should look around the palace and comeback in two house. “At the same time, I want you to 48. this spoon with milk, "said the king."As youwalk around my palace, carry this spoon without spilling( 溢出)the milk.The boy kept his 49 on the spoon and began to walk around the fantastic palace. After two hours, he came back to the king."well, "asked the king. "Did you see the wonderful 50 my dining hall?“Did you see the 51. flowers in the garden?" The boy felt sorry because he only paid attention to the milk."Then 52. and see the beauty of my world," said the king. This time the boy saw all of the 53 of art on the walls. He saw the greatest gardens and mountains all around. When he came back, he described 54he saw. But where is the milk? asked the king, Looking down at the spoon he held, the boysaw.“But where is the milk?” asked the king. Looking down at the spoon he held,the boy saw the milk was 55 . “Wel l, the key to happiness is to see all the beauty of the world and also keep an eye on the spoon.46.A.unlucky B. happy C.proud D.rich47. A. friendly B. beautiful fortable D.small48.A.drink B.buy C. pay D. hold49 A. care B.eyes C. ears D. mouth50.A.books B.paintings C. maps D. magazines51.A.exciting B.delicious C. colorful D.smelly52.A. go back B. go away C. go along D. go down53.A.newspapers B.works C.beds D.desks54.A.something B.anything C.everything D.nothing55.A.run B.ridden C.worn D.gone四.阅读理解(本大题有15小题,每小题2分,共30分)A56.From the passage above we know that it is nowA.MarchB. AprilC.JuneD. December57.Who may get an MP4 as a present in electrical supermarket?A. Li Ming who will buy a Hisense TVB Han Mei who is the first to arrive at the supermarketC Chen Wei who was born on May IaD. Dingding who goes to the supermarket with his grandmother of over 80 years old.58.who sells the best in Huizhou Electrical SupermarketA Panasonic Washing Machine B. TCL CookerC.Hisense TVD. MP459. If you want to buy an 8 kg Panasonic Washing Machine and a Size 45 Hisense TV, you should payA.¥10,197B.¥7,297C.¥6,797D.¥64,9760. From the passage above, we can know thatA.you can use Hisense TV to take photosB the price of TCL Cooker is ¥198C. everyone who goes to the supermarket on May 1st can get a special giftD Panasonic Washing Machine can make your clothes half dryBWhat can be both rad or green, round or sharp, big or small, and mo:e importantly, loved or hated by someone? Yes, the answer is chilies(辣椒).Many of us in China enjoy adding chilies to our food, but did you know that this spicy vegetables could also dangerous? A 34-year-old ts man recently ended up in hospital after eating a Carolina Reaper, the spiciestchili people have ever known so far. After taking just a single bit of one, the man suffered from serious headache in the following days, reported BBC News.In fact, eating spicy food cause stomachaches to headaches. But if chilies are harmful, why do people liketo eat this vegetable? So what makes people love chilies so much? The human body influenced by natural chemicals that produce " a sense of happiness " noted BBC News.And chilies do good to people in another way, Scientists found that the death rate of who eat spicy food once or twice a week is 10 percent lower than those, who eat it less than once a week. The death rate is 14 percent lower for those who eat spicy food six to seven times a week. This encourages people to eat more spicy food to improve heath and bring less death risk at an early age. So, don't worry if you love spicy food. It seems that chilies are actually good for us.61.What is the main idea of the second paragraph?A. Eating chilies can be dangerous. B The US man died in hospital US man often had a headache. D. The Chinese enjoy eating chilies.62. People like to eat chilies becauseA. Chilies do no harm to peopleB the chilies is a kind of vegetableC. they can get personal enjoymentD. chemicals in chilies make them mad63.What does the underlined word"spicy. " mean in Chinese?A.酸的B苦的C有害 D. 辣的64.Which of the following is true according to the passage??A. The more chilies you cal, the longer you must Live.B. Scientists said that chilies was a kind of medicineC. We should eat chilies seven times a dayD. Proper spicy food may improve our health65. The passage may come fromA. a menuB.a magazineC. a story bookD. a novelC配对阅读五、短文填空A woman came out of her house and saw three old men sitting in front of her house. She did not recognize them. She said, "I don't think I know you, but 71 must be hungry. Please come in and have something to72 "“Why do not go into a house together after you make a decision,” they replied. “Why?” she 73 .One of the old men explained: "His name is Wealth. "he said pointing 74. at one of his friends, "and he is Success, and I am Love. ” Then he added, " Now go in and discuss with your husband which one of us you want in your home.”The woman went in and discussed with her husband. Her husband was very excited. “ 75 nice!",he said. “Since that is the case, let us invite Wealth. Let him comp and fill our home with wealth! " His wife disagreed. “My dear,why don’t 76 Success?” Their 77 was listening outside the house. She jumped in with her own suggestion, "Wouldn’t it be better to invite Love? Our home will then be 78 of love,"Let us take our daughter'sadvice. "said the husband to his wife.So the woman went out and invited Love to come into her house. To her surprise, all 79. the three men walked towards the house.The old men explained together: "If you had invited Wealth 80 Success, the other two of us would have stayed out, but since you invited Love, wherever he goes, we go with him. Wherever there is Love, there is also Wealth and Success.六、读写归综合(分为A、B两部分,共20分)A.信息归纳(每小题1分,共5分)阅读下面短文,完成文章后面的信息归纳表。
广东省惠州市惠城区2018-2019学年九年级(上)期末数学模拟试卷(WORD版 )
2018-2019 学年广东省惠州市惠城区九年级(上)期末数学模拟试卷一.选择题(共10 小题,满分30 分,每小题 3 分)1.下列图形中,不是中心对称图形的是()A.B.C.D.2.已知关于x 的一元二次方程x2﹣4x+c=0 的一个根为1,则另一个根是()A.5 B.4 C.3 D.23.函数y=ax2+ax+a(a≠0)的图象可能是下列图象中的()A.B.C.D.4.如图是每个面上都有一个汉字的正方体的一种展开图,那么在正方体的表面与“生”相对应的面上的汉字是()A.数B.学C.活D.的5.半径为10 的⊙O 和直线l 上一点A,且OA=10,则直线l 与⊙O 的位置关系是()A.相切B.相交C.相离D.相切或相交6.如图,在Rt△ABC 中,∠C=90°,AC=6,BC=8,把△ABC 绕AB 边上的点D 顺时针旋转90°得到△A′B′C′,A′C′交AB 于点E,若AD=BE,则△A′DE 的面积是()A.3 B.5 C.11 D.67.圆锥的母线长是3,底面半径是1,则这个圆锥侧面展开图圆心角的度数为()A.90°B.120°C.150°D.180°8.独山县开展关于精准扶贫、精准扶贫的决策部署以来,某贫困户2014 年人均纯收入为2620 元,经过帮扶到2016 年人均纯收入为3850 元,设该贫困户每年纯收入的平均增长率为x,则下面列出的方程中正确的是()A.2620(1﹣x)2=3850 B.2620(1+x)=3850C.2620(1+2x)=3850 D.2620(1+x)2=38509.如图,点A 在双曲线y=﹣上,过点A 作AB∥x 轴交双曲线y=﹣于点B,点C、D都在x 轴上,连接AD、BC,若四边形ABCD 是平行四边形,则▱ABCD 的面积为()A.1 B.2 C.3 D.410.二次函数y=ax2+bx+c 的图象如图所示,则下列结论中错误的是()A.函数有最小值B.c<0C.当﹣1<x<2 时,y>0D.当x<时,y 随x 的增大而减小二.填空题(共6 小题,满分24 分,每小题 4 分)11.设α,β是方程x2﹣x﹣2019=0 的两个实数根,则α3﹣2021α﹣β的值为;12.在平面直角坐标系中,点A的坐标为(a,3),点B的坐标是(4,b),若点A与点B关于原点O 对称,则ab=.13.将二次函数y=x2﹣1 的图象向上平移3 个单位长度,得到的图象所对应的函数表达式是.14.如图,四边形ABCD 内接于⊙O,OC∥AD,∠DAB=60°,∠ADC=106°,则∠OCB=°.15.有一人感染流感,经过两轮传播后共有121 人患病,则第三轮感染后共有患病.16.如图,△ABC的三个顶点的坐标分别为A(﹣3,5),B(﹣3,0),C(2,0),将△ABC绕点B 顺时针旋转一定角度后使A 落在y 轴上,与此同时顶点C 恰好落在y=的图象上,则k 的值为.三.解答题(共3 小题,满分18 分,每小题 6 分)17.已知关于x的一元二次方程(x﹣m)2﹣2(x﹣m)=0(m为常数).(1)求证:不论m 为何值,该方程总有两个不相等的实数根;(2)若该方程一个根为3,求m 的值.18.如图,抛物线y=ax2+bx+c经过A(﹣1,0)、B(3,0)、C(0,3)三点,直线l是抛物线的对称轴.(1)求抛物线的函数关系式;(2)求出抛物线的顶点坐标,对称轴及二次函数的最大值.19.如图所示,正方形ABCD,边长为10 厘米,AB 为半圆的直径,求阴影部分的面积(结果保留π)四.解答题(共3 小题,满分21 分,每小题7 分)20.某市为打造“绿色城市”,积极投入资金进行园林绿化工程.2016年投资2000万元,之后投资逐年增加,预计2018 年投资 2 420 万元.求这两年投资的年平均增长率.21.如图,在平面直角坐标系中,Rt△ABC 三个顶点都在格点上,点A、B、C 的坐标分别为A(﹣4,1),B(﹣1,1),C(﹣1,3)请解答下列问题:(1)画出△ABC 关于原点O 的中心对称图形△A1B1C1,并写出点C 的对应点C1 的坐标;(2)画出△ABC 绕原点O 逆时针旋转90°后得到的△A2B2C2,并直接写出点A 旋转至A2 经过的路径长.22.在一个不透明的布袋里装有三个标号分别为1,2,3 的小球,它们的材质、形状、大小完全相同,小凯从布袋里随机取出一个小球,记下数字为x,然后将小球放回布袋,小敏再从布袋中随机取出一个小球,记下数字为y,这样确定了点A的坐标为(x,y).请用列表或画树形图的方法,求点A 在函数图象上的概率.五.解答题(共3 小题,满分27 分,每小题9 分)23.如图,在平面直角坐标系中,直线l1:y=﹣x 与反比例函数y=的图象交于A,B两点(点A在点B左侧),已知A点的纵坐标是2;(1)求反比例函数的表达式;(2)根据图象直接写出﹣x>的解集;(3)将直线l1:y=x 沿y 向上平移后的直线l2 与反比例函数y=在第二象限内交于点C,如果△ABC 的面积为30,求平移后的直线l2 的函数表达式.24.如图,AB 为⊙O 的直径,点C,D 在⊙O 上,且点C 是的中点,过点C 作AD 的垂线EF 交直线AD 于点E.(1)求证:EF 是⊙O 的切线;(2)连接BC,若AB=5,BC=3,求线段AE 的长.25.如图,在平面直角坐标系中有一直角三角形AOB,O 为坐标原点,OA=1,tan∠BAO=3,将此三角形绕原点O 逆时针旋转90°,得到△DOC,抛物线y=ax2+bx+c 经过点A、B、C.(1)求抛物线的解析式;(2)若点P 是第二象限内抛物线上的动点,其横坐标为t,设抛物线对称轴l 与x 轴交于一点E,连接PE,交CD 于F,求以C、E、F 为顶点三角形与△COD 相似时点P 的坐标.参考答案一.选择题(共10 小题,满分30 分,每小题3 分)1.【解答】解:A、是中心对称图形,故本选项错误;B、不是中心对称图形,故本选项正确;C、是中心对称图形,故本选项错误;D、是中心对称图形,故本选项错误;故选:B.2.【解答】解:设方程的另一个根为m,则1+m=4,∴m=3,故选:C.3.【解答】解:在函数y=ax2+ax+a(a≠0)中,当a<0 时,则该函数开口向下,顶点在y 轴左侧,抛物线与y 轴的负半轴相交,故选项D 错误;当a>0 时,则该函数开口向上,顶点在y 轴左侧,抛物线与y 轴的正半轴相交,故选项A、B 错误;故选项C 正确;故选:C.4.【解答】解:∵正方体的平面展开图中,相对面的特点是之间一定相隔一个正方形,∴在此正方体上与“生”字相对的面上的汉字是“学”.故选:B.5.【解答】解:若OA⊥l,则圆心O 到直线l 的距离就是OA 的长,等于半径,所以直线l与⊙O 相切;若OA 与直线l 不垂直,根据垂线段最短,圆心O 到直线l 的距离小于5,即小于半径,所以直线l 与⊙O 相交.故选:D.6.【解答】解:Rt△ABC 中,AB==10,由旋转的性质,设AD=A′D=BE=x,则DE=10﹣2x,∵△ABC 绕AB 边上的点D 顺时针旋转90°得到△A′B′C′,∴∠A′=∠A,∠A′DE=∠C=90°,∴△A′DE∽△ACB,∴=,即=,解得x=3,=DE×A′D=×(10﹣2×3)×3=6,∴S△A′DE故选:D.7.【解答】解:圆锥侧面展开图的弧长是:2πcm,设圆心角的度数是x 度.则=2π,解得:x=120.故选:B.8.【解答】解:如果设该贫困户每年纯收入的平均增长率为x,那么根据题意得:2620(1+x)2,列出方程为:2620(1+x)2=3850.故选:D.9.【解答】解:∵点A 在双曲线上,点B 在双曲线上,且AB∥x 轴,∴设A(﹣,b),B(﹣,b),则AB=﹣+,▱ABCD的CD边上高为b,∴S▱ABCD=(﹣+ )×b=﹣4+6=2.故选:B.10【解答】解:A、由图象可知函数有最小值,故正确;B、由抛物线与y 轴的交点在y 的负半轴,可判断c<0,故正确;C、由抛物线可知当﹣1<x<2 时,y<0,故错误;D、由图象可知在对称轴的左侧y 随x 的增大而减小,故正确;故选:C.二.填空题(共6 小题,满分24 分,每小题4 分)11.【解答】解:根据题意得:α+β=1,α3﹣2021α﹣β=α(α2﹣2020)﹣(α+β)=α(α2﹣2020)﹣1,∵α2﹣α﹣2019=0,∴α2﹣2020=α﹣1,把α2﹣2020=α﹣1 代入原式得:原式=α(α﹣1)﹣1=α2﹣α﹣1=2019﹣1=2018.12【解答】解:∵点A的坐标为(a,3),点B的坐标是(4,b),点A与点B关于原点O 对称,∴a=﹣4,b=﹣3,则ab=12.故答案为:12.13【解答】解:二次函数y=x2﹣1的顶点坐标为(0,﹣1),把点(0,﹣1)向上平移3个单位长度所得对应点的坐标为(0,2),所以平移后的抛物线解析式为y=x2+2.故答案为:y=x2+2.14【解答】解:∵OC∥AD,∴∠OCD=180°﹣∠ADC=74°,∵四边形ABCD 内接于⊙O,∴∠BCD=180°﹣∠DAB=120°,∴∠OCB=∠BCD﹣∠OCD=46°,故答案为:46.15【解答】解:设每轮传染中平均一个人传染了x 个人则有:1+x+x(1+x)=121解这个方程,得x1=10,x2=﹣12(不合题意,舍去)所以平均一人传染了10 个人第三轮后共有121+121×10=1331(人)即第三轮后共有1331 人患病故答案为:1331 人16.【解答】解:∵A(﹣3,5),B(﹣3,0),C(2,0),∴AB=5,BC=2﹣(﹣3)=2+3=5,AB⊥x 轴,∴△ABC 是等腰直角三角形,过点A′作A′E⊥AB 于E,过点C′作C′F⊥x 轴于F,则A′E=3,BE==4,∵△A′BC′是△ABC 旋转得到,∴∠A′BE=∠C′BF,在△A′BE 和△C′BF 中,,∴△A′BE≌△C′BF(AAS),∴BF=BE=4,C′F=A′E=3,∴OF=BF﹣OB=4﹣3=1,∴点C′的坐标为(1,﹣3),把(1,﹣3)代入y=得,=﹣3,解得k=﹣3.故答案为:﹣3.三.解答题(共3 小题,满分18 分,每小题 6 分)17.【解答】(1)证明:原方程可化为x2﹣(2m+2)x+m2+2m=0,∵a=1,b=﹣(2m+2),c=m2+2m,∴△=b2﹣4ac=[﹣(2m+2)]2﹣4(m2+2m)=4>0,∴不论m 为何值,该方程总有两个不相等的实数根.(2)解:将x=3代入原方程,得:(3﹣m)2﹣2(3﹣m)=0,解得:m1=3,m2=1.∴m 的值为3 或1.18.【解答】解:(1)设抛物线解析式为y=a(x+1)(x﹣3),把C(0,3)代入得a•1•(﹣3)=3,解得a=﹣1,所以抛物线解析式为y=﹣(x+1)(x﹣3)=﹣x2+2x+3;(2)y=﹣x2+2x+3=﹣(x﹣1)2+4,所以抛物线的顶点坐标为(1,4),对称轴为:直线x=1,二次函数的最大值是4.19.【解答】解:设AB的中点为O,连接OE,∵四边形ABCD 是正方形,∴∠CBD=45°,∵正方形ABCD 边长为10,∴OB=OE=5,∴∠BOE=90°,∴S 阴=S 梯形CDEO﹣S 扇形COE=(5+10)×5﹣=﹣π.四.解答题(共3 小题,满分21 分,每小题7 分)20【解答】解:设这两年投资的年平均增长率为x,根据题意得:2000(1+x)2=2420,解得:x1=0.1=10%,x2=﹣2.1(不合题意,舍去),答:这两年投资的平均年增长率为10%.21【解答】解:(1)△ABC关于原点O的中心对称图形△A1B1C1如图所示:点C1的坐标为(1,﹣3).(2)△ABC 绕原点O 逆时针旋转90°后得到的△A2B2C2 如图所示:∵OA==,∴点A 经过的路径长为=π.22【解答】解:由表格可知,共有9 种等可能出现的结果,其中点A 在函数图象上(记为事件A)的结果有两种,即(2,3),(3,2)所以,.五.解答题(共3 小题,满分27 分,每小题9 分)23【解答】解:(1)∵直线l1:y=﹣x经过点A,A点的纵坐标是2,∴当y=2 时,x=﹣4,∴A(﹣4,2),∵反比例函数y=的图象经过点A,∴k=﹣4×2=﹣8,∴反比例函数的表达式为y=﹣;(2)∵直线l1:y=﹣x 与反比例函数y=的图象交于A,B 两点,∴B(4,﹣2),∴不等式﹣x>的解集为x<﹣4 或0<x<4;(3)如图,设平移后的直线l2 与x 轴交于点D,连接AD,BD,∵CD∥AB,∴△ABC 的面积与△ABD 的面积相等,∵△ABC 的面积为30,∴S+S△BOD=30,即OD(|y A|+|y B|)=30,△AOD∴×OD×4=30,∴OD=15,∴D(15,0),设平移后的直线l2 的函数表达式为y=﹣x+b,把D(15,0)代入,可得0=﹣×15+b,解得∴平移后的直线l2 的函数表达式为y=﹣x+ .24【解答】(1)证明:连接OC,∵OA=OC,∴∠OCA=∠BAC,∵点C 是的中点,∴∠EAC=∠BAC,∴∠EAC=∠OCA,∴OC∥AE,∵AE⊥EF,∴OC⊥EF,即EF 是⊙O 的切线;(2)解:∵AB 为⊙O 的直径,∴∠BCA=90°,∴AC==4,∵∠EAC=∠BAC,∠AEC=∠ACB=90°,∴△AEC∽△ACB,解得 ,25【解答】解:(1)在 Rt △AOB 中,OA =1,tan ∠BAO = =3,∴OB =3OA =3∵△DOC 是由△AOB 绕点 O 逆时针旋转 90°而得到的,∴△DOC ≌△AOB ,∴OC =OB =3,OD =OA =1.∴A ,B ,C 的坐标分别为(1,0),(0,3),(﹣3,0),代入解析式为,抛物线的解析式为 y =﹣x 2﹣2x +3;(2)∵抛物线的解析式为 y =﹣x 2﹣2x +3,∴对称轴为 l =﹣=﹣1,∴E 点坐标为(﹣1,0),如图,①当∠CEF =90°时,△CEF ∽△COD , 此时点 P 在对称轴上,即点 P 为抛物线的顶点,P (﹣1,4);②当∠CFE =90°时,△CFE ∽△COD ,过点 P 作 PM ⊥x 轴于 M 点,△EFC ∽△EMP ,∴ = ,∴AE = = .∴===∴MP=3ME,∵点P 的横坐标为t,∴P(t,﹣t2﹣2t+3),∵P 在第二象限,∴PM=﹣t2﹣2t+3,ME=﹣1﹣t,∴﹣t2﹣2t+3=3(﹣1﹣t),解得t1=﹣2,t2=3,(与P在二象限,横坐标小于0矛盾,舍去),当t=﹣2 时,y=﹣(﹣2)2﹣2×(﹣2)+3=3∴P(﹣2,3),∴当△CEF与△COD相似时,P点的坐标为(﹣1,4)或(﹣2,3).。
2018-2019学年广东省惠州市惠阳区九年级(上)期末考物理试卷及答案解析
2018-2019学年广东省惠州市惠阳区九年级(上)期末考物理试卷一、单项选择题(每题3分,共21分)1.通常情况下,下列都属于导体的一组物质是()A.铁、铜、大地、食盐水B.铝、石墨、陶瓷、铅C.水银、锡箔、橡胶、镍D.铜、塑料、人体、黄金2.人造地球卫星在大气层外环绕地球运行(不受空气阻力),当它从远地点向近地点运动时()A.动能减小,势能增大,机械能不变B.动能增大,势能减小,机械能不变C.动能减小,势能减小,机械能减小D.动能增大,势能减小,机械能减小3.在四冲程汽油机的工作循环中,将内能转化为机械能的冲程是()A.吸气冲程B.压缩冲程C.做功冲程D.排气冲程4.在篮球比赛中,运动员对篮球没有做功的过程是()A.运球B.扣篮C.擦板D.跳投5.如下图所示的用电器中,利用电流热效应工作的是()A.电动机B.电风扇C.电饭锅D.电视机6.关于温度、热量和内能,下列说法中不正确的是()A.0℃的冰块内能一定不为零B.物体温度升高,内能一定增加C.温度高的物体,内能不一定大D.热量总是从内能大的物体向内能小的物体传递7.如图所示,电源电压保持不变,开关S闭合后,灯泡L1、L2都能正常发光,甲、乙两只电表的示数之比为3:5,则L1、L2的额定功率之比是()A.2:3B.3:2C.5:3D.3:5二、填空题(每小题3分,21分)8.铁水很热,冰块很冷,但它们都具有能。
冬天搓手可以感到温暖,是通过的方式改变内能;用热水袋取暖,是通过的方式改变内能。
9.当玻璃棒和丝绸摩擦时,丝绸带电,是因为在摩擦过程中丝绸(选填“得到”或“失去”)电子。
反复摩擦后,发现玻璃棒的温度升高,这是通过方式改变物体内能的。
10.汽车发动机工作时,需要对它进行冷却。
人们常常选用“水”作冷却剂,这是因为水的较大,冷却效果好;水的比热容为4.2×103J/(kg•℃),将4kg的水倒掉一半,剩下的水的比热容是J/(kg•℃);当水吸收发动机缸体热量后,水的内能。
2018-2019学年广东省惠州一中九年级(上)期末化学试卷解析版
2018-2019学年广东省惠州一中九年级(上)期末化学试卷一、单选题(本大题共14小题,共28.0分)1.下列物质的变化常常伴随在我们生活中,与其它物质变化类型不同的一项是()A. 把木炭放入冰箱中,冰箱异味消失B. 厨房中因燃气泄漏而发生爆炸C. 天热吃雪糕时,发现雪糕慢慢融化D. 湿的衣服晾干【答案】B【解析】解:A、把木炭放入冰箱中,冰箱异味消失,是因为木炭吸附了冰箱中的异味,过程中只是木炭把异味吸附在表面,没有生成新物质,属于物理变化;B、燃气泄漏而发生爆炸,是因为燃气燃烧生成了新物质,属于化学变化;C、雪糕慢慢融化过程中,只是雪糕由固体变成液体,过程中没有生成新物质,属于物理变化;D、湿的衣服晾干过程中,水由液体变成气体,过程中没有生成新物质,属于物理变化。
故选:B。
化学变化过程中有新物质生成,物理变化过程中没有新物质生成,是否生成新物质是判断化学变化的依据.搞清楚物理变化和化学变化的本质区别是解答本类习题的关键,判断的标准是看在变化中有没有生成其它物质,一般地,物理变化有物质的固、液、气三态变化和物质形状的变化,而化学变化中有新物质生成.2.下列物质中,目前计入“空气污染指数”项目的是()A. 氮气B. 氧气C. 稀有气体D. 可吸入颗粒物【答案】D【解析】解:目前计入我国“空气污染指数”的监测项目有:二氧化硫、一氧化碳、二氧化氮、可吸入颗粒及臭氧等。
A、氮气是空气的主要成分之一,不是我国“空气污染指数”的监测项目,故选项错误。
B、氧气是空气的主要成分之一,不是我国“空气污染指数”的监测项目,故选项错误。
C、稀有气体是空气的成分之一,不是我国“空气污染指数”的监测项目,故选项错误。
D、可吸入颗粒物属于空气污染物,是我国“空气污染指数”的监测项目,故选项正确。
故选:D。
根据“空气污染指数”所涉及的空气污染指数的项目,进行分析判断.本题难度不大,空气污染指数作为城市空气质量日报的重要内容,了解包括的各个项目即可正确解答本题.3.下列图标中,表示“禁止带火种”的是()A. B. C. D.【答案】A【解析】解:A、图中所示标志是禁止带火种标志,故选项正确。
惠州市九年级上学期期末数学试卷
惠州市九年级上学期期末数学试卷姓名:________ 班级:________ 成绩:________一、仔细选一选 (共10题;共20分)1. (2分)设a、b为常数,且b>0,抛物线y=ax2+bx+a2﹣5a﹣6为下列图形之一,则a的值为()A . 6或﹣1B . ﹣6或 1C . 6D . ﹣12. (2分)(2019·凉山) 如图,在中,,则 sinB 的值为()A .B .C .D .3. (2分)如图,点A,E,F,C在同一条直线上,AD∥BC,BE的延长线交AD于点G,且BG∥DF,则下列结论错误的是()A . =B . =C . =D . =4. (2分)在Rt△ABC,∠C=90°,AC=3,BC=4,则∠A的余切值等于()A .B .C .D .5. (2分) (2019九上·简阳期末) 在一个布袋里装着只有颜色不同,其他都相同的红、黄、黑三种小球各一个,从中任意摸出一个球;记下颜色后放回并搅匀,再摸出一个球,两次摸球所有可能的结果如图,则摸出的两个球中,一个是红球,一个是黑球的概率是()A .B .C .D .6. (2分)济南大明湖畔的“超然楼”被称作“江北第一楼”,某校数学社团的同学对超然楼的高度进行了测量,如图,他们在A处仰望塔顶,测得仰角为30°,再往楼的方向前进60m至B处,测得仰角为60°,若学生的身高忽略不计,≈1.7,结果精确到1m,则该楼的高度CD为()A . 47mB . 51mC . 53mD . 54m7. (2分)如图,P是Rt△ABC的斜边BC上异于B、C的一点,过P点作直线截△AB C,使截得的三角形与△ABC 相似,满足这样条件的直线共有()A . 1条B . 2条C . 3条D . 4条8. (2分) (2017九上·顺义月考) 二次函数y=ax2+bx+c的自变量x与函数y的对应值如下表:x…-5-4-3-2-10…y…40-2-204…下列说法正确的是()A . 抛物线的开口向下B . 当x>-3时,y随x的增大而增大C . 二次函数的最小值是-2D . 抛物线的对称轴是直线x=-9. (2分)如图,折叠直角三角形纸片的直角,使点C落在斜边AB上的点E处.已知AB=,∠B=30°,则DE的长是()A .B . 6C . 4D . 210. (2分)如果直角三角形的一个锐角是另一个锐角的4倍,那么这个直角三角形中一个锐角的度数是()A . 9°B . 18°C . 27°D . 36°二、认真填一填 (共6题;共7分)11. (1分)(2017·路北模拟) 甲箱内有4颗球,颜色分别为红、黄、绿、蓝;乙箱内有3颗球,颜色分别为红、黄、黑.小明打算同时从甲、乙两个箱子中各抽出一颗球,若同一箱中每球被抽出的机会相等,则小明抽出的两颗求颜色相同的概率为________.12. (1分)已知C是线段AB的黄金分割点,若AB=2,则BC=________。
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惠州一中2018-2019九年级上学期期末试卷听力略。
一.单项填空(本大题有15小题每小题1分,共15分)在每小题所给的四个选项中,选出可以填入空白处的最佳答案,并将答题卡上对应题目所选的选项涂黑。
( )31. ----President Xi Jinping paid _____ important visit to the US in 2017.--- And he was warmly welcomed by Donald Trump,______ 45th American president.A. a: the B, an: a C. the: a D. an: the( )32.-----What is Tony busy with?------He is reading some_____on Chinese________ cutting in the reading room .A. paper, paperB. papers; paperC. papers: papersD. paper, papers( )33. The medicine that was discovered by Tu Youyou _____ many people's lives in the past few years .A. savedB. has savedC. savesD. will save( )34. ----500 yuan for pulling a tooth? It's only a couple of minutes 'work .---- Well,I can do it______ if you like.A .more quickly B. quickly C. more slowly D. slowly( )35 It's the 49th Earth Day and I think the government should order people_____too many trees.A. cutting downB. to cut downC. not cutting downD. not to cut down( ) 36 The international meeting_____ in Hainan in a few weeks’ time .A. holdsB.is heldC. is going to holdD.will be held( )37. The young man works hard and hopes to____ his own company.A. take upB. give upC. set upD. pick up( )38----I can't find my English book. Have you seen ______?----Oh, sorry. I have taken______ by mistake.A them; myB them;your C. it; mine D. it;yours( )39. Look at the man standing at the school gate. Is he your math teacher Mr. Brown-No, it ______ be him. He has gone to Chengdu on business.A. needn'tB.can’tC.may notD.mustn’t( )40.I_____the telephone number many times, but the foreigner still couldn't write it downA. replacedB.spread.C. consideredD. repeated( ) 4I. Make a call to us as soon as you know the result of the speech competition. We are_____your good news.A. taking pride inB.suffering fromC. hoping for D dealing with( )42.We are talking about the piano and the pianist_____were in the concert last night.A. thatB.whichC.whoD.whom( )43.----what a mess! The sharing bikes are thrown everywhere.----let's collect and put them in the right place _____ they can be used conveniently.A. unlessB. so thatC. even thoughD. as soon as( )44. ---- What are you searching for online?---- I'm trying to find out____“ the country riding on the sheep’s back”.A. why Australia is calledB. why is Australia calledC. that Australia is calledD. that is Australia called( )45.----mum, I am sorry I have failed the driving test.----________ Dear, I am sure you are in with a chance to pass it next time .A. No dealB. That's no excuseC. Face the truthD. It doesn't matter三、完形填空(本大题有10小题,每小题1分,共10分)通读下面短文,掌提其大意,然后在每小题所给的四个选项中选出一个最佳答案并将答题卡上对应题目所选的选项涂黑。
This story will warm you better than a coffee on a cold winter day.One day, my friend and I entered a___46___ coffee house and ordered two cups of coffee. __47___ we were waiting , two young men came in and began to order, "Five cups of coffee, please. Two of them for us and three suspended(待用)."They___48___ their order, took the two and left. I asked my friend, " What are those suspended’ coffees? ___49___ givi ng me the answer, he told me to wait and see.More people came. Two girls__ 50__ one coffee each, paid and went away. Then came three lawyers who paid for seven coffees-- three for themselves and four suspended. When I still wondered what the suspended coffees were,I enjoyed the sunny __51__ and the beautiful view in front of this little coffee house.__52__ a poor man like a beggar cam e into the coffee house. He kindly ordered a suspended coffee sat there to drink __53__.At that moment, I knew the meaning of the suspended coffees without difficulty. It’s__ 54__---peoplepay the coffee in advance( 预先)for someone who can't__ 55__ it. The tradition with the suspended coffees started in Italy, but it has spread all over the world. Meanwhile, I understood suspended coffee is not only a cup of coffee, but also the warmth and love to someone in need.( )46.A. crazy B .poor C. quiet D. little( )47.A. After B. Before C.While D .As soon as( )48. A sent out B. took out C looked for D paid for( )49.A. Instead of B In a way C. In need of D ahead of( )50. A asked for B. care for C thanked for D.wait for( )51. A discovery B. condition C. weather D. calendar( )52.A Specially B Probably C. Suddenly D Quickly( )53.A, them B. it C. this D. these( )54. A simple B. difficult C, strange D. natural( )55. A. sell B want C drink D. afford四、阅读理解(本大题有15小题,每小题2分,共30分)阅读A、B两篇短文,从每小题所给的四个选项中,选出能回答所提问题或完成所给句子的最佳答案,并将答题卡上对应题目所选的选项涂黑。