期中复习二
初一期中复习训练题二
初一期中复习训练题二一、选择题1．13的相反数是（ ）A ．13B ．3C ．3-D ．13-2．下列运算中错误的是( )A ．5(5)---B ．3(2)8-=- C ．123a a += D ．22222+= 3．下列式子,12,4,1,48,1,2,5122++-+-x x x b a x mn xy 其中单项式共有( ) A ．3个 B ．4个 C ．5个 D ．6个 4．下列各式中，去括号正确的是（ ）A ．(23)23a b c d a b c d +-+=-+-B ．(23)23a b c d a b c d --+=--+C ．(23)23a b c d a b c d --+=-+-D ．(23)23a b c d a b c d --+=-++5．北京2008奥运的国家体育场“鸟巢”建筑布告达25.8万m 2，用科学记数法表示应为（ ） A ．25.8×104m 2 B ．25.8×105m 2 C ．2.58×105m 2 D ．2.58×106m 2 6．下列条件：①a+b=0；②a-b=2a ；③2ab a =-；④1ab=-；⑤a b =.其中能判断a 、b 互为相反数的条件是（ ）A . ①②③⑤B . ②③④C . ①③④D . ①②④7．按括号内的要求，用四舍五入法，对1022.0099取近似值, 其中错误的是（ ）. A.1022.01(精确到0.01) B.1.0×103(精确到百位) C.1020(精确到十位)D.1022.010(精确到千分位)8．若m ，n 为正整数，则多项式4m n m n x x +--的次数应当是（ ） A ．m B ．m +n C ．n D ．m ，n 中较大的数 9．若多项式22131173x kxy y xy --+-中不含xy 的项，则常数k 的值是（ ） A. 3-B. 1-C. 19D. 1310．若方程(1)20mm x --=是关于x 的一元一次方程，则此方程的解为（ ）.A.x =1B.x =-1C.x 为任意数D.无解11．某通讯公司的手机的市话收费标准按原标准每分钟降低了a 元后，再次下调了25%，现在的收费标准是每分钟b 元，则原收费标准是每分钟（ ）元 A.54b a - B.54b a + C.34b a - D.43b a +12．下列说法：①若1a b =-，则a ，b 互为相反数 ；②若0a b +<，0ba>，则4343a b a b +=+； ③一个数的立方是它本身，则这个数为0或1；④若21x x +=，那么13x =或x = 1．其中正确说法的个数是（ ）A ．0B ．1C ．2D ．3 二、填空题13．请写出一个关于x 的一元一次方程，使它的解为x =-3： . 14．如果234m xy --与272n x y -的和是单项式，则m = ，n = 。
大学物理期中复习 二
（D）1 = 2 ，1 = 2 ，一个在地球上作竖直振动，另一个在月球上作竖直振动
例13：（补2）一弹簧振子，当把它水平放置时，它作简谐振动。若把它
竖直放置或放在光滑斜面上，试判断下列情况正确的是
（A）竖直放置作简谐振动，在光滑斜面上
不作简谐振动
（B）竖直放置不作简谐振动，在光滑斜面
上作简谐振动
（C）刚体所受的合外力和合外力矩均为零
（D）刚体的转动惯量和角速度均保持不变
例10：（补4）关于刚体有以下几种说法：
（1）对某个定轴而言，内力矩不会改变刚体的角动量
（2）作用力和反作用力对同一定轴的力矩之和必为零
（3）刚体角动量守恒的充分必要条件是刚体不受外力矩的作用
（A）只有(2)是正确的
（B）(1)、(2)是正确的
例24：（选1）一质点沿轴运动，运动方程 = ()，当满足下列哪个条
件时，质点向坐标原点O运动？
Τ
A
>0
B
<0
2
C
<0
2
D
>0
Τ
例25：（选3）根据瞬时速度的定义及其坐标表示，它的大小
റ
റ 可表
示为
1
4
റ +
റ +
+ =
则该质点运动轨迹方程是 ____________________
（SI），
它描述的轨迹是______________________。
半径为 的圆
例22：（补10）质点P在直线上运动，其坐标与时间有如下关系：
武汉市黄陂区九年级上期中数学复习试卷(二)含解析
2022-2023湖北省武汉市黄陂区九年级（上）期中数学复习试卷（二）一、选择题（共10小题，每小题3分，共30分）1．一元二次方程x（x﹣1）=0的根是（）A．1 B．0 C．0或1 D．0或﹣12．下列是几个汽车的标志，其中是中心对称图形的是（）A． B．C． D．3．若关于x的方程（a﹣1）x2+2x﹣1=0是一元二次方程，则a的取值范围是（）A．a≠1 B．a＞1 C．a＜1 D．a≠04．已知方程2x2﹣4x﹣3=0两根分别是x1和x2，则x1x2的值等于（）A．﹣3 B．﹣C．3 D．5．如图，△ABC≌△AED，点D落在BC上，且∠B=60°，则∠EDC的度数等于（）A．45°B．30°C．60°D．75°6．用配方法解方程x2+8x+9=0，变形后的结果正确的是（）A．（x+4）2=﹣7 B．（x+4）2=﹣9 C．（x+4）2=7 D．（x+4）2=257．如图，在⊙O中，半径OC⊥弦AB于P，且P为OC的中点，则∠BAC的度数是（）A．45°B．60°C．25°D．30°8．某树主干长出若干数目的支干，每个支干又长出同样数目小分支，主干、支干、和小分支总数共57．若设主干长出x个支干，则可列方程是（）A．（1+x）2=57 B．1+x+x2=57 C．（1+x）x=57 D．1+x+2x=579．如图，一次函数y1=x与二次函数y2=ax2+bx+c图象相交于P、Q两点，则函数y=ax2+（b ﹣1）x+c的图象可能是（）A．B．C．D．10．一元二次方程：M：ax2+bx+c=0；N：cx2+bx+a=0，其中ac≠0，a≠c，以下四个结论：①如果方程M有两个不相等的实数根，那么方程N也有两个不相等的实数根；②如果方程M有两根符号相同，那么方程N的两根符号也相同；③如果m是方程M的一个根，那么是方程N的一个根；④如果方程M和方程N有一个相同的根，那么这个根必是x=1正确的个数是（）A．1 B．2 C．3 D．4二、填空题（共6小题，每小题3分，共18分）11．方程x2=2x的解是．12．如图可以看作是一个等腰直角三角形旋转若干次而生成的，则每次旋转的度数是度．13．如图，图案均是用长度相等的小木棒，按一定规律拼撘而成，第一个图案需4根小木棒，则第6个图案小木棒根数是．14．太阳从西边出来，这个事件的概率为．15．已知方程x2+3x﹣1=0的两个实数根为α、β，不解方程求α2+β2的值．16．某型号的手机连续两次降阶，每个售价由原来的1185元降到580元．设平均每次降价的百分率为x，列方程为．三、解答题（共8题，共72分）17．按要求解下列方程：x2+x﹣3=0（公式法）18．如图所示，已知抛物线y=﹣x2+bx+c与x轴的一个交点为A（4，0），与y轴交于点B （0，3）．求此抛物线所对应的函数关系式．19．如图，AB为⊙O的直径，CD⊥AB于E，CO⊥AB于F，求证：AD=CD．20．已知a、b是方程x2+x﹣=0的两个实数根，求：a2+2a+b的值．21．如图，方格纸中的每个小方格都是边长为1个单位的正方形，在建立平面直角坐标系后，△ABC的顶点均在格点上，三个顶点的坐标分别为A（2，2），B（1，0），C（3，1）．①将△ABC关于x轴作轴对称变换得△A1B1C1，则点C1的坐标为；②将△ABC绕原点O按逆时针方向旋转90°得△A2B2C2，则点C2的坐标为；③△A1B1C1与△A2B2C2成中心对称吗？若成中心对称，则对称中心的坐标为．22．如图所示，点P是正方形ABCD内的一点，连接AP，BP，CP，将△PAB绕着点B顺时针旋转90°到△P′CB的位置．若AP=2，BP=4，∠APB=135°，求PP′及PC的长．23．如图（1），在Rt△ABC中，∠A=90°，AC=AB=4，D，E分别是AB，AC的中点．若等腰Rt△ADE绕点A逆时针旋转，得到等腰Rt△AD1E1，如图（2），设旋转角为α（0＜α≤180°），记直线BD1与CE1的交点为P．（1）求证：BD1=CE1；（2）当∠CPD1=2∠CAD1时，求CE1的长；（3）连接PA，△PAB面积的最大值为．（直接填写结果）24．如图，已知抛物线y=x2+bx+c（b，c是常数，且c＜0）与x轴分别交于点A、B（点A位于点B的左侧），与y轴的负半轴交于点C，点A的坐标为（﹣1，0）．（1）b=，点B的横坐标为（上述结果均用含c的代数式表示）；（2）连接BC，过点A作直线AE∥BC，与抛物线y=x2+bx+c交于点E，点D是x轴上一点，其坐标为（2，0），当C、D、E三点在同一直线上时，求抛物线的解析式；（3）在（2）的条件下，点P是x轴下方的抛物线上的一动点，连接PB、PC，设所得△PBC 的面积为S，求S的取值范围．2022-2023湖北省武汉市黄陂区九年级（上）期中数学复习试卷（二）参考答案与试题解析一、选择题（共10小题，每小题3分，共30分）1．一元二次方程x（x﹣1）=0的根是（）A．1 B．0 C．0或1 D．0或﹣1【考点】解一元二次方程-因式分解法．【分析】利用因式分解法把原方程转化为x=0或x﹣1=0，然后解两个一次方程即可．【解答】解：x=0或x﹣1=0，所以x1=0，x2=1．故选C．2．下列是几个汽车的标志，其中是中心对称图形的是（）A． B．C． D．【考点】中心对称图形．【分析】根据中心对称图形的概念对各选项分析判断后利用排除法求解．【解答】解：A、是中心对称图形，故本选项正确；B、不是中心对称图形，故本选项错误；C、不是中心对称图形，故本选项错误；D、不是中心对称图形，故本选项错误．故选A．3．若关于x的方程（a﹣1）x2+2x﹣1=0是一元二次方程，则a的取值范围是（）A．a≠1 B．a＞1 C．a＜1 D．a≠0【考点】一元二次方程的定义．【分析】根据一元二次方程的定义：只含有一个未知数，并且未知数的最高次数是2的整式方程叫一元二次方程可得a﹣1≠0，再解即可．【解答】解：由题意得：a﹣1≠0，解得：a≠1．故选：A．4．已知方程2x2﹣4x﹣3=0两根分别是x1和x2，则x1x2的值等于（）A．﹣3 B．﹣C．3 D．【考点】根与系数的关系．【分析】利用根与系数的关系，直接得出两根的积．【解答】解：∵方程2x2﹣4x﹣3=0两根分别是x1和x2，12故选：B．5．如图，△ABC≌△AED，点D落在BC上，且∠B=60°，则∠EDC的度数等于（）A．45°B．30°C．60°D．75°【考点】全等三角形的性质．【分析】根据全等三角形的性质：对应角和对应边相等解答即可．【解答】解：∵△ABC≌△ADE，∴∠B=∠ADE=60°，AB=AD，∴∠ADB=∠B=60°，∴∠EDC=180°﹣∠ADE﹣∠ADB=60°．故选C．6．用配方法解方程x2+8x+9=0，变形后的结果正确的是（）A．（x+4）2=﹣7 B．（x+4）2=﹣9 C．（x+4）2=7 D．（x+4）2=25【考点】解一元二次方程-配方法．【分析】方程移项后，利用完全平方公式配方即可得到结果．【解答】解：方程x2+8x+9=0，整理得：x2+8x=﹣9，配方得：x2+8x+16=7，即（x+4）2=7，故选C7．如图，在⊙O中，半径OC⊥弦AB于P，且P为OC的中点，则∠BAC的度数是（）A．45°B．60°C．25°D．30°【考点】垂径定理；含30度角的直角三角形．【分析】连接OB，根据OC⊥AB，P为OC的中点可得出OP=OB，故∠OBP=30°，由直角三角形的性质得出∠BOP的度数，根据圆周角定理即可得出结论．【解答】解：连接OB，∵OC⊥AB，P为OC的中点，∴∠OBP=30°，∴∠BOP=90°﹣30°=60°，∴∠BAC=∠BOP=30°．故选D．8．某树主干长出若干数目的支干，每个支干又长出同样数目小分支，主干、支干、和小分支总数共57．若设主干长出x个支干，则可列方程是（）A．（1+x）2=57 B．1+x+x2=57 C．（1+x）x=57 D．1+x+2x=57【考点】由实际问题抽象出一元二次方程．【分析】关键描述语是“主干、支干、小分支的总数是73”，等量关系为：主干1+支干数目+小分支数目=57，把相关数值代入即可．【解答】解：∵主干为1，每个支干长出x个小分支，每个支干又长出同样数目的小分支，∴小分支的个数为x×x=x2，∴可列方程为1+x+x2=57．故选B．9．如图，一次函数y1=x与二次函数y2=ax2+bx+c图象相交于P、Q两点，则函数y=ax2+（b ﹣1）x+c的图象可能是（）A．B．C．D．【考点】二次函数的图象；正比例函数的图象．【分析】由一次函数y1=x与二次函数y2=ax2+bx+c图象相交于P、Q两点，得出方程ax2+（b﹣1）x+c=0有两个不相等的根，进而得出函数y=ax2+（b﹣1）x+c与x轴有两个交点，根据方程根与系数的关系得出函数y=ax2+（b﹣1）x+c的对称轴x=﹣＞0，即可进行判断．【解答】解：∵一次函数y1=x与二次函数y2=ax2+bx+c图象相交于P、Q两点，∴方程ax2+（b﹣1）x+c=0有两个不相等的根，∴函数y=ax2+（b﹣1）x+c与x轴有两个交点，又∵﹣＞0，a＞0∴﹣=﹣+＞0∴函数y=ax2+（b﹣1）x+c的对称轴x=﹣＞0，∴A符合条件，故选A．10．一元二次方程：M：ax2+bx+c=0；N：cx2+bx+a=0，其中ac≠0，a≠c，以下四个结论：①如果方程M有两个不相等的实数根，那么方程N也有两个不相等的实数根；②如果方程M有两根符号相同，那么方程N的两根符号也相同；③如果m是方程M的一个根，那么是方程N的一个根；④如果方程M和方程N有一个相同的根，那么这个根必是x=1正确的个数是（）A．1 B．2 C．3 D．4【考点】根的判别式；一元二次方程的解．【分析】利用根的判别式与求根公式直接判断①②；利用代入的方法判断③④即可．【解答】解：①两个方程根的判别式都是△=b2﹣4ac，所以如果方程M有两个不相等的实数根，那么方程N也有两个不相等的实数根正确；②如果方程M的两根符号相同，那么方程N的两根符号也相同，那么△=b2﹣4ac≥0，＞0，所以a与c符号相同，＞0，所以方程N的两根符号也相同，结论正确；③如果m是方程M的一个根，那么m2a+mb+c=0，两边同时除以m2，得c+b+a=0，所以是方程N的一个根，结论正确；D、如果方程M和方程N有一个相同的根，那么ax2+bx+c=cx2+bx+a，（a﹣c）x2=a﹣c，由a≠c，得x2=1，x=±1，结论错误．正确的是①②③共3个．故选：C．二、填空题（共6小题，每小题3分，共18分）11．方程x2=2x的解是x1=0，x2=．【考点】解一元二次方程-因式分解法．【分析】首先移项，利用因式分解法将原式分解因式得出即可．【解答】解：x2=2xx2﹣2x=0，x（x﹣2）=0，解得：x1=0，x2=．故答案为：x1=0，x2=．12．如图可以看作是一个等腰直角三角形旋转若干次而生成的，则每次旋转的度数是45度．【考点】旋转的性质．【分析】根据旋转的性质并结合一个周角是360°求解．【解答】解：∵一个周角是360度，等腰直角三角形的一个锐角是45度，∴如图，是由一个等腰直角三角形每次旋转45度，且旋转8次形成的．∴每次旋转的度数是45°．13．如图，图案均是用长度相等的小木棒，按一定规律拼撘而成，第一个图案需4根小木棒，则第6个图案小木棒根数是54．【考点】规律型：图形的变化类．【分析】由题意可知：第1个图案需要小木棒1×（1+3）=4根，第二个图案需要2×（2+3）=10根，第三个图案需要3×（3+3）=18根，第四个图案需要4×（4+3）=28根，…，继而即可找出规律，进一步求出第6个图案需要小木棒的根数【解答】解：拼搭第1个图案需4=1×（1+3）根小木棒，拼搭第2个图案需10=2×（2+3）根小木棒，拼搭第3个图案需18=3×（3+3）根小木棒，拼搭第4个图案需28=4×（4+3）根小木棒，…拼搭第n个图案需小木棒n（n+3）=n2+3n根．当n=6时，n2+3n=62+3×6=54．故答案为：54．14．太阳从西边出来，这个事件的概率为0．【考点】概率的意义．【分析】根据事件的类型判断相应的概率即可．【解答】解：太阳从西边出来为不可能事件，故这个事件的概率为0．故答案为：0．15．已知方程x2+3x﹣1=0的两个实数根为α、β，不解方程求α2+β2的值．【考点】根与系数的关系．【分析】根据根与系数的关系找出α+β=﹣3、αβ=﹣1，利用完全平方公式将α2+β2的变形为只含α+β、αβ的算式，代入数据即可得出结论．【解答】解：∵方程x2+3x﹣1=0的两个实数根为α、β，∴α+β=﹣3，αβ=﹣1，∴α2+β2=（α+β）2﹣2αβ=9+2=11．16．某型号的手机连续两次降阶，每个售价由原来的1185元降到580元．设平均每次降价的百分率为x，列方程为1185（1﹣x）2=850．【考点】由实际问题抽象出一元二次方程．【分析】设平均每次降价的百分率为x，则第一次降价后售价为1185（1﹣x），第二次降价后售价为1185（1﹣x）2，然后根据两次降阶后的售价建立等量关系即可．【解答】解：根据题意得1185（1﹣x）2=850．故答案为1185（1﹣x）2=850．三、解答题（共8题，共72分）17．按要求解下列方程：x2+x﹣3=0（公式法）【考点】解一元二次方程-公式法．【分析】先求出b2﹣4ac的值，再代入公式x=计算即可．【解答】解：∵a=1，b=1，c=﹣3，∴△=b2﹣4ac=12﹣4×1×（﹣3）=13＞0，x==，∴x1=，x2=．18．如图所示，已知抛物线y=﹣x2+bx+c与x轴的一个交点为A（4，0），与y轴交于点B （0，3）．求此抛物线所对应的函数关系式．【考点】抛物线与x轴的交点；待定系数法求二次函数解析式．【分析】直接利用待定系数法求出二次函数解析式进而得出答案．【解答】解：把点A（4，0），B（0，3）代入二次函数y=﹣x2+bx+c，，解得：，所以二次函数的关系式为：y=﹣x2+x+3．19．如图，AB为⊙O的直径，CD⊥AB于E，CO⊥AB于F，求证：AD=CD．【考点】圆周角定理；全等三角形的判定与性质．【分析】由CD⊥AB于E，CO⊥AB于F，根据垂径定理可得AD=2AF，CD=2CE，∠OEC=∠OFA=90°，然后由AAS判定△COE≌△AOF，继而证得CE=AF，则可证得结论．【解答】证明：∵CD⊥AB，CO⊥AB，∴∠OEC=∠OFA=90°，AD=2AF，CD=2CE，在△OCE和△OAF中，，∴△OCE≌△OAF（AAS），∴CE=AF，∴AD=CD．20．已知a、b是方程x2+x﹣=0的两个实数根，求：a2+2a+b的值．【考点】根与系数的关系．【分析】先根据一元二次方程的解的定义得到a2+a﹣=0，即a2+a=，则a2+2a+b可化为a2+a+a+b=+a+b，然后利用根与系数的关系得到a+b=﹣1，再利用整体代入的方法计算即可．【解答】解：∵a，b是方程x2+x﹣=0的两个实数根，∴a2+a﹣=0，a+b=﹣1，∴a2+a=，∴a2+2a+b=a2+a+a+b=﹣1=．21．如图，方格纸中的每个小方格都是边长为1个单位的正方形，在建立平面直角坐标系后，△ABC的顶点均在格点上，三个顶点的坐标分别为A（2，2），B（1，0），C（3，1）．①将△ABC关于x轴作轴对称变换得△A1B1C1，则点C1的坐标为（3，﹣1）；②将△ABC绕原点O按逆时针方向旋转90°得△A2B2C2，则点C2的坐标为（﹣1，3）；③△A1B1C1与△A2B2C2成中心对称吗？若成中心对称，则对称中心的坐标为（，）．【考点】作图-旋转变换；作图-轴对称变换．【分析】（1）根据轴对称图形的性质可知点C的坐标为（3，﹣1）；（2）根据旋转变换图形的性质也可求出点C2的坐标；（3）成中心对称，连续各对称点，连线的交点就是对称中心，从而可以找出对称中心的坐标．【解答】解：（1）点C1的坐标为（3，﹣1）；（2）点C2的坐标为（﹣1，3）；（3）△A1B1C1与△A2B2C2成中心对称，对称中心的坐标为．22．如图所示，点P是正方形ABCD内的一点，连接AP，BP，CP，将△PAB绕着点B顺时针旋转90°到△P′CB的位置．若AP=2，BP=4，∠APB=135°，求PP′及PC的长．【考点】旋转的性质；勾股定理；正方形的性质．【分析】先根据旋转的性质得到BP′=BP=4，P′C=AP=2，∠PBP′=90°，∠BP′C=∠BPA=135°，则可判断△PB P′是等腰直角三角形，根据等腰直角三角形的性质得PP′=BP=4，∠BP′P=45°，于是可计算出∠PP′C=90°，然后在Rt△PP′C中利用勾股定理计算PC的长．【解答】解：∵△PAB绕着点B顺时针旋转90°到△P′CB的位置，∴BP′=BP=4，P′C=AP=2，∠PBP′=90°，∠BP′C=∠BPA=135°，∴△PB P′是等腰直角三角形，∴PP′=BP=4，∠BP′P=45°，∴∠PP′C=∠BP′C﹣∠BP′P=135°﹣45°=90°，在Rt△PP′C中，PC===6．答：PP′和PC的长分别为4，6．23．如图（1），在Rt△ABC中，∠A=90°，AC=AB=4，D，E分别是AB，AC的中点．若等腰Rt△ADE绕点A逆时针旋转，得到等腰Rt△AD1E1，如图（2），设旋转角为α（0＜α≤180°），记直线BD1与CE1的交点为P．（1）求证：BD1=CE1；（2）当∠CPD1=2∠CAD1时，求CE1的长；（3）连接PA，△PAB面积的最大值为2+2．（直接填写结果）【考点】几何变换综合题．【分析】（1）由旋转得到△ABD1≌△ACE1的条件即可；（2）由（1）的结论，在利用勾股定理计算即可；（3）作出辅助线，利用勾股定理建立方程求出即可．【解答】解：（1）在△ABD1和△ACE1中∴△ABD1≌△ACE1∴BD1=CE1（2）由（1）知△ABD1≌△ACE1，可证∠CPD1=90°∴∠CAD1=45°，∴∠BAD1=135°延长BA交D1E1于F，∴∠D1AF=45°=∠AD1E1，∴AF=D1F==；∵∠AFD1=90°，∴BD1=2．（3）如图作PG⊥AB，交AB所在直线于点G，∵D1，E1在以A为圆心，AD为半径的圆上，当BD1所在直线与⊙A相切时，直线BD1与CE1的交点P到直线AB的距离最大，此时四边形AD1PE1是正方形，PD1=2，则BD1==2，∴∠ABP=30°，∴PB=2+2，∴点P到AB所在直线的距离的最大值为：PG=1+．∴△PAB的面积最大值为AB×PG=2+2，故答案为2+2．24．如图，已知抛物线y=x2+bx+c（b，c是常数，且c＜0）与x轴分别交于点A、B（点A位于点B的左侧），与y轴的负半轴交于点C，点A的坐标为（﹣1，0）．（1）b=+c，点B的横坐标为﹣2c（上述结果均用含c的代数式表示）；（2）连接BC，过点A作直线AE∥BC，与抛物线y=x2+bx+c交于点E，点D是x轴上一点，其坐标为（2，0），当C、D、E三点在同一直线上时，求抛物线的解析式；（3）在（2）的条件下，点P是x轴下方的抛物线上的一动点，连接PB、PC，设所得△PBC 的面积为S，求S的取值范围．【考点】二次函数综合题．【分析】（1）将A（﹣1，0）代入y=x2+bx+c，可以得出b=+c；根据一元二次方程根与系数的关系，得出﹣1•x B=，即x B=﹣2c；（2）由y=x2+bx+c，求出此抛物线与y轴的交点C的坐标为（0，c），则可设直线BC的解析式为y=kx+c，将B点坐标代入，运用待定系数法求出直线BC的解析式为y=x+c；由AE∥BC，设直线AE得到解析式为y=x+m，将点A的坐标代入，运用待定系数法求出直线AE得到解析式为y=x+；解方程组，求出点E坐标为（1﹣2c，1﹣c），将点E坐标代入直线CD的解析式y=﹣x+c，求出c=﹣2，进而得到抛物线的解析式；，易求0＜S＜5；（Ⅱ）（3）分两种情况进行讨论：（Ⅰ）当﹣1＜x＜0时，由0＜S＜S△ACB当0＜x＜4时，过点P作PG⊥x轴于点G，交CB于点F．设点P坐标为（x，x2﹣x﹣2），则点F坐标为（x，x﹣2），PF=PG﹣GF=﹣x2+2x，S=PF•OB=﹣x2+4x=﹣（x=4，即0＜S≤4．则0＜S＜5．﹣2）2+4，根据二次函数的性质求出S最大值【解答】解：（1）∵抛物线y=x2+bx+c过点A（﹣1，0），∴0=×（﹣1）2+b×（﹣1）+c，∴b=+c，∵抛物线y=x2+bx+c与x轴分别交于点A（﹣1，0）、B（x B，0）（点A位于点B的左侧），∴﹣1与x B是一元二次方程x2+bx+c=0的两个根，∴﹣1•x B=，∴x B=﹣2c，即点B的横坐标为﹣2c；故答案为： +c；﹣2c；（2）∵抛物线y=x2+bx+c与y轴的负半轴交于点C，∴当x=0时，y=c，即点C坐标为（0，c）．设直线BC的解析式为y=kx+c，∵B（﹣2c，0），∴﹣2kc+c=0，∵c≠0，∴k=，∴直线BC的解析式为：y=x+c．∵AE∥BC，∴可设直线AE得到解析式为y=x+m，∵点A的坐标为（﹣1，0），∴×（﹣1）+m=0，解得：m=，∴直线AE得到解析式为：y=x+．由，解得，，∴点E坐标为（1﹣2c，1﹣c）．∵点C坐标为（0，c），点D坐标为（2，0），∴直线CD的解析式为y=﹣x+c．∵C，D，E三点在同一直线上，∴1﹣c=﹣×（1﹣2c）+c，∴2c2+3c﹣2=0，∴c1=（与c＜0矛盾，舍去），c2=﹣2，∴b=+c=﹣，∴抛物线的解析式为y=x2﹣x﹣2；（3）①设点P坐标为（x，x2﹣x﹣2）．∵点A的坐标为（﹣1，0），点B坐标为（4，0），点C坐标为（0，﹣2），∴AB=5，OC=2，直线BC的解析式为y=x﹣2．分两种情况：（Ⅰ）当﹣1＜x＜0时，0＜S＜S△ACB．∵S△ACB=AB•OC=5，∴0＜S＜5；（Ⅱ）当0＜x＜4时，过点P作PG⊥x轴于点G，交CB于点F．∴点F坐标为（x，x﹣2），∴PF=PG﹣GF=﹣（x2﹣x﹣2）+（x﹣2）=﹣x2+2x，∴S=S△PFC +S△PFB=PF•OB=（﹣x2+2x）×4=﹣x2+4x=﹣（x﹣2）2+4，∴当x=2时，S最大值=4，∴0＜S≤4．综上可知0＜S＜5．11月1日。
2019学年沪教版第一学期四年级数学第11讲-期中复习(二)(含答案)
第11讲－期中复习（二）（一）上次课课后巩固作业处理，建议让学生互批互改，个别错题可以让学生进行分享，针对共性的错题教师讲解为主。
（二）易错题整理一、填空题1、用分数表示空白部分。
（）2、把两个长4厘米，宽3厘米的长方形纸片拼成一个大的长方形，拼成的长方形的周长可能是（）。
3、张老师带了一些钱去买篮球，他发现自己的带的钱，如果买10个篮球，还差42元，如果买9个篮球，就多了38元。
每个篮球（）元，张老师带了（）元钱。
4、3个绿色的正方形占整体的3，现在减少一个绿色的正方形，现在绿色的正方形占整体的（）。
7一袋1千克的盐，第一次用了它的25，第二次用了0.5千克，两次就用完了。
（）参考答案：×四、应用题1、商场开展促销活动，购买2瓶1升的苹果汁送一瓶355毫升的苹果汁。
小丁丁买了10瓶1升的苹果汁，他可以得到多少苹果汁？参考答案：1升＝1000毫升10升＝10000毫升355×5＝1775毫升10000+1775＝11775毫升2、一辆卡车运送化肥，上午3次运了4560千克，下午每次运1625千克，下午每次比上午多运了多少千克？参考答案：4560÷3＝1520（千克）1625－1520＝105（千克）知识一、应用题例1：仓库里有795吨钢材，如果每辆货车可装6吨钢材，那么用一辆货车几次才能将这些钢材全部运走？教法指导：求全部运走需要几辆这样的货车，即求795里面含有几个6，根据求一个数里面含有几个另一个数，196－156＝40（元）；40÷20＝2（元）。
试一试：在4500毫升的浓缩橙汁里加上10升水，可以制成多少毫升的橙汁饮料？如果把这些橙汁饮料平均分发给15名同学，每个人最多可以分到多少？还剩多少？参考答案： 10升＝10000毫升；10000+4500＝14500毫升；14500÷15＝966……10（毫升）四年级第一学期数学期中模拟测试卷一、计算部分1、直接写出得数（9%）：50×120＝174＋28÷7＝ 30－30÷10＝12×5－5＝ 101×33＝ 16×20÷16×20＝ 132＋137＝ 1－197＝ （ ）－155＝155 参考答案：6000 178 2755 3333 4005、文字题（10%）（1）2个30相乘的积除以66与33的商，结果是多少？（2）150乘以150减去50的差，积是多少？参考答案：2×30÷（66÷33）＝30；150×（150－50）＝15000二、概念部分1、填空题（7%）（1）20升15毫升＝（）毫升4t－215kg＝（）t5平方米－4平方分米＝（）平方厘米（2）一个7位数，最高位和最低位上是3，千位上是7，其余各位都是0，这个数读作（），用四舍五入法改写成以万为单位的数约是（）。
华东师大版2020-2021学年七年级下册数学期中复习试卷二(含答案)
华东师大版2020-2021学年七年级下册数学期中复习试卷二一、选择题二、1.不等式293(2)x x ++≥的解集是（ ）A.3x ≤B.3x -≤C.3x ≥D.3x -≥2.根据等式的性质，下列变形正确的是（ ）A.若2x a =，则2x a =B.若123x x +=，则321x x += C.若ab bc =，则a c = D.若a b c c =，则a b = 3.关于x 的一元一次方程224a x m -+=的解为1x =，则a m +的值为（ ） A.9B.8C.5D.4 4.若m n ＞，下列不等式不一定成立的是（ ）A.33m n ++＞B.33m n --＜C.33m n ＞D.22m n ＞5.不等式组271532x x +⎧⎨-⎩＞≥的解集在数轴上表示正确的是（ ） A.B. C. D.6.若关于x 的不等式组2(1)20x a x -⎧⎨-⎩＞＜的解集是x a ＞，则a 的取值范围是（ ）A.2a ＜B.2a ≤C.2a ＞D.2a ≥7.已知232a x y 与214a b x y +-是同类项，则a b 的值为（ ）A.2B.2-C.1D.1-8.小明网购了一本《好玩的数学》，同学们想知道书的价格，小明让他们猜。
甲说：“至少15元。
”乙说：“至多12元。
”丙说：“至多10元。
”小明说：“你们三个人都说错了”。
则这本书的价格x （元）所在的范围为（ ）A.1012x ＜＜B.1215x ＜＜C.1015x ＜＜D.1114x ＜＜9.《九章算术》中有这样一个题：今有甲乙二人持钱不知其数。
甲得乙半而钱五十，乙得甲太半而钱亦五十。
问甲、乙持钱各几何？其意思为：今有甲乙二人，不知其钱包里有多少钱，若乙把其一半的钱给甲，则甲的钱数为50；而甲把其23的钱给乙，则乙的钱数也为50，问甲、乙各有多少钱？设甲的钱数为x ，乙的钱数为y ，则可建立方程组为（ ）A.15022503x y x y ⎧+=⎪⎪⎨⎪+=⎪⎩ B.15022503x y x y +=+= C.15022503x y x y ⎧+=⎪⎪⎨⎪+=⎪⎩ D.15022503x y x y ⎧+=⎪⎪⎨⎪+=⎪⎩10.小明在超市帮妈妈买回一袋纸杯，他把纸杯整齐地叠放在一起，如图请你根据图中的信息，若小明把100个纸杯整齐叠放在一起时，它的高度约是（ ）A.106 cmB.110 cmC.114 cmD.116 cm二、填空题（每小题3分，共15分）11.若1m +与2-互为相反数，则m 的值为________。
2022-2023六年级英语期中复习卷(二)
期中复习卷（二）二、单项填空（共15小题;每小题1分，满分15分）16. —How do you make the birthday card for your mom, Millie?—Well, I decorate it ________ a small paper rose.A. onB. inC. withD. by17. Sally is ________ and often shares things with her friends.A. patientB. generousC. humorousD. handsome18. —Andrew, what are you doing over there?—Oh, I’m ________ a small light in my toy lantern.A. putting upB. putting outC. putting inD. putting away19. The trip to Suzhou was a great, ________ we did not enjoy it at the beginning.A. andB. butC. orD. so20. Which of the following groups may be a good vocabulary tree?A. B. C. D.21. —How will you go to the Nanjing Museum, Jim?—By underground. It’s much ________ than taking a bus.A. fastB. fasterC. fastestD. the fastest22. We can add “im-” to ________ to give it the opposite meaning.A. certainB. necessaryC. comfortableD. possible23. Simon was in trouble when he pulled himself up the rocks alone. ________, some climbershelped him out in the end.A. SuddenlyB. LuckilyC. SadlyD. Usually24. —Nancy, ________ is it from your home to the Greenland Park?—About half an hour by underground.A. how manyB. how muchC. how farD. how long25. David, just ________ the windows open. It’s a little hot inside today.A. leaveB. leavesC. forgetD. forgets26. The suffix “-less” in the word “useless” means ________.A. full ofB. look likeC. withoutD. with27. —Excuse me, where is the Nanjing Olympic Centre, please?—OK. Take the Metro Line 2 and ________ at the Olympic Centre station.A. take onB. take offC. get onD. get off28. Tina didn’t listen so ________ as Amy. She came second in the race.A. carefulB. carefullyC. more carefulD. more carefully29. —I think I can get an “A” on my writing about DIY.—________. I found 8 spelling mistakes in it just now.A. I agreeB. You’re ri ghtC. Of courseD. In your dreams30. —Peter, can you help me put up the clock on the classroom wall?—________. I’m coming.A. No problemB. I hope soC. That’s all rightD. That’s a good idea三、完形填空（共10小题；每小题1分，满分10分）DIY is a usual thing in China now. Wan Gang works for a computer company in Shenzhen. He enjoys his work, 31 it is hard for him to relax(放松) after work.One day when he saw many toy dogs in a toy shop, he had a(n) 32 . “Why not do some kinds of things and relax myself?” Then he began to make model planes, model ships and something else. The things that he had made by himself didn’t look as great as 33 he paid much money for in the shops, but he liked doing it. “It is not as much fun to play with 34 things from the shops,” he said. Now his 35 are full of many kinds of things he has made. They are very beautiful, and his family like them very much.More and more young people are like Yang, making or creating things by 36 . They like to do them on their own. Though making things with our own hands may take 37 time, some people, now known as DIYers—do-it-yourselfers, enjoy doing them very much. They can make all kinds of things they like. DIY is becoming more and more 38 in China. It may be new to the young, yet many people remember when it was a way of life.During the 1960s and 1970s, when there were not enough things for people to 39 , they had to use their own hands to do many things. Whitewashing the wall or making clothes was a part of life. If you wanted something done, you had to do it yourself; and if you needed something, you 40 it yourself.31. A. and B. or C. but D. so32. A. meeting B. idea C. secret D. exam33. A. this B. that C. these D. those34. A. free B. quiet C. expensive D. cheap35. A. pockets B. bookshelves C. computers D. shops36. A. myself B. yourself C. ourselves D. themselves37. A. much B. little C. no D. all38. A. different B. difficult C. popular D. successful39. A. put on B. live on C. knock on D. get on40. A. made B. bought C. borrowed D. lent四、阅读理解（共10小题;每小题1分，满分10分）阅读下列材料，从每题所给的四个选项（A、B、C、D）中，选出最佳选项。
2020-2021学年人教版八年级期中综合复习(二)(有答案)
2020-2021学年人教版八年级下册期中综合复习（二）一、单选题1．—Many people play with mobile phones all day now.—_________ Everyone should be a book lover. Reading is more interesting.A．Well done! B．I don’t agree. C．That’s too bad.D．You’re welcome. 2．—What did he say?—He said he ____ a telephone call to his relative at 9: 30 on Saturday night.A．made B．was making C．makes D．is making 3．—My mother often sends me to all kinds of classes，so I feel very tired.—I think she should ________ a few of your activities so that you can feel relaxed.A．get out B．work out C．find out D．cut out4．It has been about half a term ______ Sandy went into junior high school. A．though B．when C．if D．since5．It’s really kind of you to offer ________ me the money.A．to lend B．lending C．lend D．to lending 6．—It was quite a heavy snow last night. Is everyone here now?—Yes, and _______ of us was late for school this morning.A．neither B．either C．all D．none 7．—Would you like to go to the movies this evening?—I'd like to，but my parents don't allow me ________ out at night.A．go B．going C．to go D．went8．—I ________ my best friend yesterday morning.—Why not call her up and say sorry to her?A．depended on B．looked forC．hung out with D．argued withKeys:1．C2．B3．D4．D5．A6．D7．C8．D二、完型填空Because of a medical accident, 44-year-old Jenny became blind. She couldn't see anything. At that time she felt 1 . And all she had to depend on（依赖）was her husband Peter.Peter loved Jenny with all his 2 . He wanted to help his wife become confident（自信的）.Jenny 3 to come back to her work, but how would she get there? She used to take the bus, but now she was too 4 to get around the city by herself. So Peter 5 to take the bus with her.For two weeks, 6 morning Peter took the bus with Jenny and then he would take a taxi back to his office. Finally, Jenny started to 7 the trip herself. Monday, Tuesday, Wednesday, Thursday……each day she went on her own. It went 8 .From then on, Jenny took the 9 to go to work as usual. As she was 10 the money for her ticket, the driver said, "Lady, how much I envy（羡慕）you!""Why do you say that?" she asked the driver.The driver answered, "You know, every morning for the past few weeks, a gentleman stood across the corner 11 you. He gave you a kiss in the air and walked away 12 he saw you cross the street 13 and go into your office building."Tears of 14 poured down from Jenny's eyes. Her husband had given her a gift more 15 than sight（视力）—the gift of love that can bring light.1．A．bored B．terrible C．excited D．surprised 2．A．way B．money C．heart D．idea 3．A．expected B．seemed C．looked D．disliked 4．A．scared B．busy C．tired D．famous 5．A．stopped B．acted C．decided D．hoped 6．A．either B．both C．each D．all7．A．create B．discover C．try D．hold 8．A．successfully B．truly C．seriously D．loudly 9．A．taxi B．bus C．train D．plane 10．A．making B．paying C．sharing D．spending 11．A．helping B．waiting C．touching D．watching 12．A．after B．though C．if D．and 13．A．quickly B．safely C．beautifully D．quietly 14．A．excitement B．sadness C．hope D．happiness 15．A．similar B．healthy C．cheap D．importantKeys:1.B2.C3.A4.A5.C6.C7.C8.A9.B10.B11.D12.A13.B14.D15.D三、阅读单选（A）It's important for you to set goals(目标)．However，you may feel it hard to do.The following advice can help you.◆Have a strong wish for your goalYou should remember: the starting point of all success is a strong wish.Strong wishes make good results.So，the first step in achieving a goal is to have a strong wish.◆Picture yourself achieving a goalYou can alter your life by changing your mind.You should never stop thinking that you can achieve your goal.For example，you can draw a picture of something that you want and put it up on the wall.Then you can see it every day and it seems that you have already got it.This will encourage you to make it come true.◆Make a plan to achieve your goalTo make a plan to achieve your goal is the most important step.You should make sure that you think through everything in the plan first.Each day you should follow the plan so that you can achieve your goal.◆Check your progressAs you are trying to achieve your goal，you need to check how much progress you have made and how many things you have missed.Write these things down and find out how to do them better. 1．What is the first step to achieve a goal?A．Drawing a picture. B．Studying hard.C．Having a strong wish. D．Living happily.2．The underlined word “alter” in the passage means “________” in Chinese.A．破坏B．改变C．抄袭D．选择3．Which of the following is not mentioned in the passage?A．Ask for help. B．Change your mind.C．Make a plan. D．Check your progress.4．What can we learn from the passage?A．Setting goals is the most difficult thing for some people.B．You don't have to follow every plan step by step.C．Draw a picture of something and then you can have it at once.D．You need to check what you have missed on the way to your goal.5．What is the best title for this passage?A．The Reasons of Setting Goals B．The Time of Setting GoalsC．The Ways of Achieving Goals D．The Importance of Achieving Goals Keys:1.C2.B3.A4.D5.C（B）We can make mistakes at any age. Some mistakes we make are about money. But most mistakes are about people.Why do we go wrong about our friends? Sometimes people hide their real meanings when they say something. And if we don’t really listen, we miss the feeling behind the words. Suppose someone tells you, “You’re a lucky dog.” That’s being friendly. But “lucky dog”? There’s a bit of envy(嫉妒) in those words. Maybe he doesn’t see ____ himself. But “lucky dog” puts you down a little. He may mean you don’t deserve your luck.How can you tell the real meaning behind someone’s words? One way is to take a good look at the person talking. Do his words fit the way he looks? Do his words agree with the tone(语调) of voice? His posture(姿态)? The look in his eyes? Stop and think. If you spend the minute thinking about the real meaning behind one’s words, it may save another mistake.1．According to the passage, the reason why we go wrong about our friends is that ______. A．we fail to listen carefully when they talkB．we become angry when we realize what they really meanC．they sometimes said one thing but meant anotherD．we never believe what people say2．What does the underlined word “it” in the second paragraph refer to(指) ?A．Being friendly B．A bit of envy C．A lucky dog D．The good luck 3．From the passage, how many things should we pay attention to when we take a good look at the person talking?A．Three B．Five C．Six D．Four 4．According to the passage, the writer most probably is a ______.A．teacher B．psychologist(心理学家)C．farmer D．doctor5．This passage is about __________.A．how to tell the real meaning behind our wordsB．what to do when you listen to others talkingC．how to avoid(避免) mistakes when communicating with peopleD．why we must know the wrong we will doKeys:1.C2.B3.D4.B5.C（C）Mary and Tom go to the West City Supermarket to do some shopping. Here are the prices of the things in the supermarket and their lists.Mary’s shopping list: 4 apples; 1 bag of rice; 1 box of butter; 2 boxes of milk; 1 kg of steak; 3 kg of bananas.Tom's shopping list: 1 box of butter (Australia); 1 kg of steak (Australia); 3 apples (Canada);2 kg of bananas (Thailand).1．Mary wants to buy the things from China. She can only buy ________ from this supermarket. A．rice, apples, and butter B．rice, butter and steakC．apples, bananas and milk D．butter, teak and milk2．How much does Tom pay for the things?A．$88. B．$80. C．$87. D．$773．If Tom bought the cheapest things, how much could he save?A．$ 20. B．$30. C．$27. D．$25.Keys:1.C2.C3.D（D）A kind of little cars may someday take the place of today’s cars. If everyone drives such cars in the future, there will be less pollution There will also be more space for parking cars in cities, and the streets will be less crowded(拥挤的). Three such cars can fit in the space now needed for one car of the usual size.The little cars will cost much less to own and to drive. Driving will be safer, too, as these little cars can go only 65 kilometers an hour. The cars of the future will be fine for getting around a city, but they will not be useful for long trips. Little cars will go 450 kilometers before needing to stop for more gasoline(汽油).If big cars are still used along with the small ones, two kinds of roads will be needed in the future. Some roads will be used for the big, fast cars and other roads will be needed for the slower(慢的), small ones.1．There is much pollution in the car today because ________.A．people drive big cars B．people drive little cars C．the cars go 65 kilometers an hour2．The usual size of cars today are ________ that of future cars.A．much smaller than B．three times as large as C．a little larger than3．We can learn from the passage that ________.A．big cars cost less to own and to driveB．the cars of the future will be much smaller than today’s carsC．small cars are faster than big ones4．The street will be less crowded because ________.A．there will be fewer cars in the futureB．driving future cars will be safeC．future cars will be much smaller5．Two kinds of roads may be needed in the future because ________.A．there will be too many cars in the futureB．more and more people will get around a cityC．big cars and little cars may be used along with each otherKeys:1.A2.B3.B4.C5.C四、补全短文7选5（A）As people become older, they are more likely to judge (判断) things around them in the wrong way. ___1__My granddaughter, Hanna, loves to buy things on sale with her mother. She always tell other people proudly that she has found a lovely shirt on sale. __2___One day, I went shopping with Hanna’s grandfather, Bill, and Hanna. After we had parked our car, Bill jumped out to go into the store. Hanna and I waited for him in the car.“I like that truck,” Hanna said, suddenly. Then I noticed that there was an old truck behind our car, with a lot of clothes on it. __3___ We got out of the car to have a look. However, I found that the clothes were of bad quality; they were not very nice, and they were not even clean.Surprised, I asked Hanna, “Dear, why do you like it?”“I just do,” she answered.___4__It was also dirty, because of the rain from the day before. I wondered what people might think of me because of my dirty car.We adults often judge other people, other things for certain reasons. __5___They just judge using their hearts.A．Then I looked at my car.B．Unlike her, many adults hide the fact that they buy things on sale.C．She is very clever.D．Many people were standing around it.E.They start to judge them only through their eyes, rather than their hearts.F.But children don’t need those strange reasons.G.But the truck looks very old and shabby.Keys:1.E2.B3.D4.A5.F（B）A: Hey, Jason! What are you going to do?B: I'm going to visit Ted.A: __1___ Do you forget Ted is still in China?B: Oh, I really forgot it. __2___A: In a week.B: Oh! ___3__A: Me too. What are you going to do next?B: __4__A: But it's too hot today.B: __5___A: It'll be cool. Let's go to the park tomorrow!B: Sounds great. How about having a picnic in the park tomorrow?A: That's a good idea.A．Are you joking?B．I'm going to the park.C．He went to China by plane.D．I wish I were with him now.E.How soon will Ted be back?F.Can I go to the park with you?G.What will the weather be like tomorrow?Keys:1.A2.E3.D4.B5.G五、用单词的正确形式完成短文also, because, keep, start, job, for, save, visit, photo, languageI’m Ken. I’m going to finish high school in two years. And then I’m going to study languages at university__1___four years. I’m going to work as a ___2__ teacher after graduation. At the university, I’m ___3__going to take computer lessons__4__ I’m going to use the computer in my work. I’m going to play sports to __5___ healthy, too. I really enjoy traveling, so before __6___ to work, I’m going to travel somewhere. In order to(为了）travel，I’m going to find a part-time__7___as a waiter in a restaurant. I’m going to ___8__ my money for six months，and then I’m going to ___9___Australia. I’m going to see lots of animals there! Of course, I’m going to take lots of __10___on my trip so that I can remember it.Keys:1.for nguage3.also4.because5.keep6.starting7.job8.save9.visit10.photos六、材料作文假如你叫王林，参加了学校的“有烦恼向谁说?”的调查活动。
五年第一学期期中复习之二(情景反应)
( )10. 你妈妈夸您是一个好孩子，你会说:
Thank you.
Hale Waihona Puke ( )11. 您想知道今天星期几,会说:
What day is it today?
( )12. 您想知道明天星期几,你会说:
What day is it tomorrow?
( )13.教师节当天，你会对你的教师说:
Happy Teachers’ Day.
Who’s that man?
( ) 7.如果您想知道今天的天气怎么样,你 会问: What’s the weather like today? ( ) 8.如果您想说那个男孩很滑稽,你会说:
That boy is very funny.
( ) 9.别人对您表示感谢，你可以说:
You’re welcome.
( ) 1.如果您想知道别人今天上什么课,你 What do you have today? 会问: ( ) 2.如果您想知道别人今天午饭吃什么, 你会问: What do you have for lunch today? ( ) 3.如果您想知道别人今天午饭想吃什么, 你会问: What would you like for lunch today? ( ) 4. 您想知道别人的妈妈是做什么的,会 说: What is your mother? ( ) 5. 您想知道别人的妈妈长什么样子,会 说: What’s your mother like? ( ) 6. 您想知道那个男人是谁,你会说:
( )14.如果您想问别人星期六做什么,你会 说: What do you do on Saturdays? ( )15.如果您想问别人星期六午饭吃什么, 你会说: What do you have on Saturdays? ( )16. 你妈妈夸您是一个好孩子，你会说:
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期中复习二姓名______学号_______ 一、听力( )1. Which sign are the two speakers talking about?( )2. What are the two speakers going to buy in the shop?A. B. C.( )3. How can the boy get to the hospital?( )4. How did the girl feel?( )5. What will Jenny do first?A. Wash the clothes.B. Visit pandas.C. Do her homework. ( )6. What did the boy wear?A. A red jumper.B. A red sweater.C. Blue jeans.( )7. How much does one glass of lemonade cost?A.$20.B. $3.C.$8.( )8. Which month is it now?A. June.B. May.C. April.( )9. What does the boy advise the girl to do?A. To do some exercise.B. To listen to some light music.C. To have a good sleep.( )10. Why does the girl vote for Max?A. Because he is clever.B. Because he is funny.C. Because he is handsome. 第二部分听对话和短文回答问题( )11. What does Tony's father do?A. A doctor.B. A designer.C. A teacher.( )12. Where does Tony's sister work?A. In a big hospital.B. In a village.C. In a town.(( )14. A. 500 B. 1,500 C. 2,000( )15. A. Break the rule of the law B. Stop pouring dirty water into the South LakeC. Plant more trees听第二篇短文，回答第16-20小题。
( )16. What kind of person was Mr Smith?A. Forgetful.B. Careful.C. Gentle.( )17. Who always helped Mr Smith?A. His boss.B. His mother.C. His wife.( )18. Why did Mr Smith keep the name of the beach a secret?A. Because he wouldn't take his children there.B. Because he wanted to make the trip more interesting for his children.C. Because he wanted to save money.( )19. How would Mr Smith and his children go to the beach?A. By train.B. By car.C. By plane.( )20. What did Mr Smith forget at first?A. The paper written by his wife.B. The place where he left his children.C. The name of the beach.二、单项选择（每小题1分，计15分）( )21. ---Nowadays, it’s not very difficult to enter ________ university.---That’s the fact, but it’s not easy to enter ________ key one.A. an; aB. a; aC. an; theD. the; the( )22. ---The children here can receive a good ________ now.---Yes. A great number of experienced teachers have been sent here.A. educationB. decisionC. opinionD. instruction ( )23. The film is so interesting that, I think, it is ________ worth seeing twice.A. veryB. muchC. wellD. little ( )24. We believe that we can’t complete the difficult task in such a short time ________ their help.A. duringB. withoutC. amongD. because of( )25. I was very nervous when I began to make the speech(演讲). I didn’t even know ____ to start with.A. howB. whenC. whyD. what ( )26. ---Would you go to the concert with me tonight, Jim?---I’d like to, but then I have a few guests to ________ in the Red Rose Restaurant.A. speakB. waitC. treatD. train( )27. You should stick to taking exercise _____ you really do not care about your health.A. sinceB. thoughC. untilD. unless( )28. ---Jimmy, Where are you? Come to help me in the kitchen.---Just a minute, mum. I ________ my bike in the yard.A. repairB. repairedC. am repairingD. have repaired ( )29. ________ noise pollution and we can live in a quiet environment.A. PreventB. PreventingC. PreventedD. To prevent ( )30. ---Dad, May I go out alone tonight?---You’d better not, Jenny. But you _____ keep an eye on your safety if you _____.A. should; shouldB. may; mayC. can; canD. must; must ( )31. ---I failed in doing the experiment just now, Mr Brown.---Don’t ________! Try once more and you will find which step was wrong.A. take upB. make upC. give upD. put up( )32. It’s _____ known that more and more foreigners are learning Chinese culture now.A. politelyB. loudlyC. widelyD. quietly( )33. ---Our classroom is so clean. Who’s cleaned it, Li Fei?---Sorry, I don’t know. I think ________ did it before class.A. somebodyB. nobodyC. everyoneD. anyone( )34. ---Excuse me. I’m a stranger here. Could you please tell me ________?---Sorry, me too. But I think you may ask the policeman on duty over there.A. what is the address of the Zhenzhou Grand TheatreB. where the Zhengzhou Grand Theatre isC. how can I get to the Zhenzhou Grand TheatreD. Which bus I take to the Zhenzhou Grand Theatre( )35. ---If you don’t mind, can I ask you some questions about your family? ---_______.A. Thank youB. No problems.C. Not badD. That’s right.三、完形填空（每小题1分，计15分）My son Daniel began surfing at the age of 13. After school each day he put on his wet suit and waited to be challenged by three-to-six-foot waves. Daniel’s love for the ride was tested one __36__ afternoon.“Your son’s been in an accident,” the lifeguard(救生员) reported to my __37__ Mike over the phone hurriedly. “__38__ he came up to the top of the water, the point of the board was headed toward his eye.”Mike rushed our son to the hospital. He __39__ 26 stitches(缝合) from the corner of his eye to the bridge of his nose.I was __40__ home from a meeting while Daniel’s eye was being stitched. Mike drove __41__ to the airport after they left the doctor’s office. He greeted __42__ at the gate while Daniel was waiting in the car.“Daniel?” I questioned. I remember thinking the __43__ must have been terrible that day.“He’s been in an accident, but he’s going to be fine.” Mike comforted me.I ran to the car. My son reached out both arms, crying, “Oh, Mom, I’m so glad you’re home.”I sobbed(抽泣) in his arms, telling him how __44__ I felt about not being there when the lifeguard called.“It’s okay, Mom,” he said. “I’ll be fine. The doctor said I can go back in the water in eight days.”Was he __45__? I wanted to tell him that he wasn’t allowed to go near water again until he was 35, but __46__ I controlled myself.He kept asking me to let him to back on the __47__ for the next seven days. One day after I __48__ “No” to him for the 100th time, he beat me at my own game.“Mom, you taught us never to __49__ what we love.”I gave in. Back then Daniel was just a boy with deep __50__ for surfing. Now he is among the top 25 surfers in the world.( )36. A. unusual B. boring C. amazing D. relaxing( )37. A. brother B. uncle C. husband D. father( )38. A. If B. When C. Unless D. Though( )39. A. avoided B. changed C. received D. discovered( )40. A. flying B. driving C. boating D. walking( )41. A. suddenly B. happily C. comfortably D. directly( )42. A. her B. them C. us D. me( )43. A. waves B. dreams C. clouds D. suggestions( )44. A. brave B. lucky C. awful D. proud( )45. A. busy B. crazy C. friendly D. polite( )46. A. instead B. already C. even D. often( )47. A. plane B. bed C. board D. chair( )48. A. posted B. offered C. threw D. repeated( )49. A. find out B. give up C. hand out D. pick up( )50. A. love B. fear C. sadness D. regret四、阅读理解A、阅读下面文章，根据文章内容选择正确答案。