江苏省盐城市建湖县汇文实验初中教育集团2019-2020学年九年级下学期第一次线上月考化学试题(word无答案)

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2019-2020学年盐城市建湖县汇文实验中学九年级(下)第一次段考化学试卷(含答案解析)

2019-2020学年盐城市建湖县汇文实验中学九年级(下)第一次段考化学试卷(含答案解析)

2019-2020学年盐城市建湖县汇文实验中学九年级(下)第一次段考化学试卷一、单选题(本大题共15小题,共30.0分)1.2018世界环境日我国确定的主题是“美丽中国,我是行动者”,下列做法不符合这一主题的是()A. 大量植树造林,禁止乱砍滥伐B. 生活垃圾分类回收C. 焚烧大量秸杆D. 尽量乘坐公交车或骑自行车出行2.下列古代发明及应用中,不涉及化学变化的是()A. 制青铜器B. 使用火药C. 活字印刷D. 粮食酿酒3.实验操作先后顺序正确的是()A. 蒸发食盐水时,先在铁圈上放置蒸发皿,后放酒精灯B. 测定溶液pH,先将试纸湿润,后用干净的玻璃棒蘸取待测液点在试纸上C. 木炭还原氧化铜结束时,先把导管从盛有石灰水的烧杯中取出,后停止加热D. 如果不慎将碱液沾到皮肤上,先涂上硼酸液,后用大量水冲洗4.下列实验现象的描述正确的是()A. 红磷燃烧放热,产生大量白色烟雾B. 铁丝在空气中剧烈燃烧,火星四射,生成黑色固体C. 铁丝伸入硝酸银溶液中,铁丝表面有固体析出、溶液变为黄色D. 一氧化碳还原氧化铁,红色粉末变成黑色5.在《国家宝藏》南京博物院专场中,大报恩寺琉璃塔拱门惊艳亮相,琉璃的主要成分二氧化硅中,硅元素的化合价是()A. −2B. 0C. +2D. +46.如图实验说明,燃烧需要的条件是()A. 有可燃物B. 有氧气(或空气)C. 温度达到可燃物的着火点D. 可燃物与火焰直接接触7.如图所示是氧原子结构示意图和硫元素在元素周期表中的信息。

下列说法正确的是()A. 氧原子核外有6个电子B. 氧原子易得到电子形成离子C. 硫原子的相对原子质量为32.06gD. 硫原子的中子数为168.今年央视“3⋅15”特别节目曝光了一种新型的瘦肉精−喹乙醇(C12H13N3O4).下列有关喹乙醇的说法正确的是()A. 喹乙醇属于有机物B. C、H的质量比为12:13C. 一个喹乙醇分子中含有2个氧分子D. 喹乙醇由12个碳原子、13个氢原子、3个氮原子和4个氧原子构成9.下表列出了除去物质中所含少量杂质的方法,其中所用方法错误的选项是()选项物质杂质除去杂质的方法A O2CO2通过碱石灰B Cu粉Fe粉加入过量稀盐酸,过滤C CO2CO通入氧气点燃D FeCl2溶液CuCl2加过量Fe粉,过滤A. AB. BC. CD. D10.X,Y,Z三种物质的溶解度曲线如图所示。

江苏省建湖县汇文实验初级中学2019-2020学年九年级3月月考物理试题(第一次线上月考)

江苏省建湖县汇文实验初级中学2019-2020学年九年级3月月考物理试题(第一次线上月考)

江苏省建湖县汇文实验初级中学2019-2020学年九年级3月月考物理试题(第一次线上月考)学校_________ 班级__________ 姓名__________ 学号__________一、单选题1. 关于声现象的描述,下列说法中正确的是()A.“闻其声而知其人”是根据声音的响度来区分的B.超声波能粉碎人体内的“结石”说明声波具有能量C.中考期间建筑工地夜间停止施工,是在传播过程中减弱嗓声D.将正在发声的手机悬挂在密闭的广口瓶内,抽出瓶内空气的过程中听到声音变大2. 对物理量的估测,是一种良好的学习习惯,也是学好物理的基本功之一。

下列估测的数据中最接近事实的是()A.一根筷子的长度约为5 cmB.家用空调正常工作时的电流约为1AC.初中男生质量约为50 kgD.苏州地区的年最低气温可达﹣40℃3. 对下列图中物态变化的描述,正确的是()A.雾的形成是液化B.露的形成是熔化C.霜的形成是升华D.雪的形成是凝固4. 如图所示的四种情景中,属于重力势能转化为动能的是A.(a)图运动员把弯弓拉开将箭射出B.(b)图跳伞运动员匀速下落C.(c)图跳水运动员从空中下落D.(d)图运动员骑自行车冲向坡顶5. 小红在马路上骑自行车,若说她是静止的,则选择的参照物可能是()A.迎面走来的行人B.路旁的树木C.小红骑的自行车D.从小红身边超越的汽车6. 下列关于粒子和宇宙的说法,正确的是()A.太阳是宇宙的中心B.原子核是由质子和中子组成的C.固体的分子是静止不动的D.分子间只存在吸引力7. 生活中处处有物理,小明同学养成了观察生活的好习惯,他对观察到的一些现象做了以下解释,其中解释正确的是()A.家里保险丝熔断,一定是用电器功率过大造成的B.可以用铜丝和铁丝代替保险丝C.发现有人触电时,应立即用手把他拉开D.电饭锅用三脚插头和三孔插座,是为了防止锅体漏电造成触电事故8. 下列光现象中,由于光的反射而形成的是A.深水看上去变“浅”了B.水中“断笔”C.水中“倒影”D.物体看上去变“大”了9. 如图,电源电压保持不变,闭合开关后,当滑动变阻器滑片P向右滑动过程中,下列说法正确的是A.电压表V示数变大示数变小B.电流表A2C.变阻器接入电路部分消耗电功率变大示数比值不变D.电压表V与电流表A210. 为避免司机低头观察汽车仪表、忽略路况造成事故,厂商开发出抬头显示器:汽车仪表安装在驾驶台上、显示面水平朝上,司机平视,借助透明挡风玻璃看到竖直的仪表显示的像。

江苏省盐城市2020年中考一模英语试卷分类汇编:词汇

江苏省盐城市2020年中考一模英语试卷分类汇编:词汇

江苏省盐城市2020年中考一模英语试卷分类汇编词汇江苏省盐城市初级中学2019-2020学年第二学期初三第一次模拟英语试卷四、词汇(共20小题,每小题1分,计20分)A.根据句意和汉语提示写出单词,完成句子。

(每空一次)1. After Alice hit the ground, she found herself alone in a long, low hall with all the doors around.(锁上的)答案:locked分析:形容词句意:爱丽丝落地后,她发现自己一个人在一个又长又矮的大厅里,所有的门都锁着。

根据空前with all the doors可知,此空应填过去分词作定语,修饰名词doors,根据句意和所给汉语提示可知,故答案为locked。

2. Tom, you look tired. What about (预订)a room for you to take a rest?答案:booking分析:动名词句意:汤姆,你看起来很累。

为什么不为你自己预定一个房间休息一下呢。

about为介词,后面动词需用加ing。

3. Finally, Kitty made up her mind to buy two (围巾)in the gift shop.答案:scarves分析:名词句意:最后,Kitty下定决心在礼物店买两条围巾。

此处需要注意围巾的复数拼写。

4. You can park your car (在......外面)my house, if you like.答案:outside分析:介词句意为:如果你喜欢的话,你可以把你的车停在我的房子外面。

5. Sandy's silk dress feels far_______(光滑的)than the cotton one.答案:smoother分析:形容词句意:桑迪的丝绸连衣裙感觉比那个纯棉的更加光滑一些。

初中数学江苏省建湖县汇文实验初中九年级数学下学期第一次质量监测考试题考试卷及答案

初中数学江苏省建湖县汇文实验初中九年级数学下学期第一次质量监测考试题考试卷及答案

xx学校xx学年xx学期xx试卷姓名:_____________ 年级:____________ 学号:______________题型选择题填空题简答题xx题xx题xx题总分得分一、xx题评卷人得分(每空xx 分,共xx分)试题1:-3的相反数是【】A.3B.-3C.-D.试题2:下列计算正确的是【】A. B. C. D.试题3:下列根式中,与是同类二次根式的是【】A. B. C. D.试题4:不等式组的解集在数轴上表示正确的是【】试题5:下列方程中,有两个不相等的实数根的是【】A.x2+1=0 B.x2-2x+1=0 C.x2+x+2=0 D.x2+2x-1=0试题6:如图,直线l∥m,将含有45°角的三角形板ABC的直角顶点C放在直线m上,若∠1=25°,则∠2的度数为【】A.20° B.25° C.30°D.35°试题7:某商品的进价为800元,出售标价为1200元,后来由于该商品积压,商店准备打折销售,要保证利润率不低于5%,该商品最多可打【】A. 9折B. 8折C. 7折D. 6折试题8:观察下列一组图形中的个数,其中第1个图中共有4个点,第2个图中共有10个点,第3个图中共有19个点,……,按此规律第5个图中共有点的个数是【】A.31 B.46 C.51 D.66试题9:若二次根式有意义,则的取值范围是 .试题10:分解因式: = .试题11:今年三八节某市150家景区接待游客约5245000人,数字5245000用科学记数法表示为 .试题12:若分式方程有增根,则m= .试题13:若分式的值为0,则x的值等于 .试题14:若与是同类项,则= .试题15:若是方程的一个根,则的值为.试题16:如图点A,B,C,D在圆O上,点O在∠D的内部,四边形OABC为平行四边形,则∠OAD+∠OCD= °.试题17:如图,在一张矩形纸片ABCD中,AD=4cm,点E,F分别是CD和AB的中点.现将这张纸片折叠,使点B落在EF上的点G处,折痕为AH.若HG的延长线恰好经过点D,则CD的长为 .试题18:如图,在△ABC中,AB=AC =10,点D是边BC上一动点(不与B,C重合),∠ADE=∠B =,DE交AC于点E,且.下列结论:①△ADE∽△ACD;②当BD=6时,△ABD与△DCE全等;③△DCE为直角三角形时,BD为8或;④.其中正确的结论是 .(把你认为正确结论的序号都填上)试题19:计算;;试题20:解方程:.试题21:先化简,再求值,其中是<x<2的整数解.试题22:已知关于的一元二次方程有两个不相等的实数根.(1)求的取值范围;(2)若为正整数,求该方程的根.试题23:如图是两个全等的含30°角的直角三角形.(1)将其相等边拼在一起,组成一个没有重叠部分的平面图形,请你画出所有不同的拼接平面图形的示意图;(2)若将(1)中平面图形分别印制在质地、形状、大小完全相同的卡片上,洗匀后从中随机抽取一张,求抽取的卡片上平面图形为轴对称图形的概率.如图,AB∥FC,D是AB上一点,DF交AC于点E,DE=FE,分别延长FD和CB交于点G.(1)求证:△ADE≌△CFE;(2)若GB=2,BC=4,BD=1,求AB的长.试题25:海中两个灯塔A、B,其中B位于A的正东方向上,渔船跟踪鱼群由西向东航行,在点C处测得灯塔A在西北方向上,灯塔B在北偏东30°方向上,渔船不改变航向继续向东航行30海里到达点D,这是测得灯塔A在北偏西60°方向上,求灯塔A、B间的距离.(计算结果用根号表示,不取近似值)试题26:如图,AB是⊙O的弦,OP⊥OA交AB于点P,过点B的直线交OP的延长线于点C,且CP=CB.(1)求证:BC是⊙O的切线;(2)若⊙O的半径为,OP=1.求BC的长.试题27:在2014年巴西世界杯足球赛前夕,某体育用品店购进一批单价为40元的球服,如果按单价60元销售,那么一个月内可售出240套.根据销售经验,提高销售单价会导致销售量的减少,即销售单价每提高5元,销售量相应减少20套.设销售单价为x(x≥60)元,销售量为y套.(1)求出y与x 的函数关系式.(2)当销售单价为多少元时,月销售额为14000元?(3)当销售单价为多少元时,才能在一个月内获得最大利润?最大利润是多少?试题28:如图,已知△BAD和△BCE均为等腰直角三角形,∠BAD=∠BCE=90°,点M为DE的中点,过点E与AD平行的直线交射线(1)当A,B,C三点在同一直线上时(如图1),求证:M为AN的中点;(2)将图1中的△BCE绕点B旋转,当A,B,E三点在同一直线上时(如图2),求证:△ACN为等腰直角三角形;(3)将图1中△BCE绕点B旋转到图3位置时, 当A,B,M,N在同一直线上时,(2)中的结论是否仍成立?若成立,试证明之,若不成立,请说明理由.试题29:如图,在△ABC中,AB=AC=10cm,BD⊥AC于点D,且BD=8cm.点M从点A出发,沿AC的方向匀速运动,速度为2cm/s;同时直线PQ由点B出发,沿BA的方向匀速运动,速度为1cm/s,运动过程中始终保持PQ∥AC,直线PQ交AB于点P、交BC于点Q、交B D于点F.连接PM,设运动时间为t秒 (0<t<5).(1)当t为何值时,四边形PQCM是平行四边形?(2)设四边形PQCM的面积为ycm2,求y与t之间的函数关系式;(3)是否存在某一时刻t,使S四边形PQCM=S△ABC?若存在,求出t的值;若不存在,说明理由;(4)连接PC,是否存在某一时刻t,使点M在线段PC的垂直平分线上?若存在,求出此时t 的值;若不存在,说明理由.试题1答案:A试题2答案:DD试题4答案:B试题5答案:D试题6答案:A试题7答案:C试题8答案:B试题9答案:x≥2;试题10答案: (x+3)(x-3);试题11答案: 5.245×106;试题12答案: -1;试题13答案: -3;试题14答案:;8;试题16答案:60°;试题17答案:;试题18答案:①②③④.试题19答案:5 ( 5分 )试题20答案:x=-3 ( 5分 )试题21答案:原式=.( 4分 )取x=0代入得原式=-1 ( 4分 )试题22答案:(1)k<( 4分 )(2)正整数k=1;x1=0, x2=-2( 4分 ) 试题23答案:(1)6种,具体略( 画出一种得1分 )(2)P=( 2分 )试题24答案:AB=30+20( 8分 )试题26答案:(1)略( 5分 )(2)BC=2. ( 5分 )试题27答案:(1)∴y=-4x+480 ( 4分 )(2)根据题意可得,x(- 4x+480)=14000 解得,x1=70,x2=50(不合题意舍去)∴当销售价为70元时,月销售额为14000元. ( 4分 )(3)设一个月内获得的利润为w元,根据题意,得w=(x-40)(-4x+480)=-4x2+640x-19200=-4(x-80)2+6400当x=80时,w的最大值为6400∴当销售单价为80元时,月内获得最大利润,最大利润是6400元. ( 4分 )试题28答案:(1)如图1,证△ADM≌△NEM,可得AM=MN.( 4分 )(2)如图2,先证△ADM≌△NEM,∴AD=NE.∴AB=NE.( 4分 )再证△ABC≌△NEC,∴AC=NC,∠ACB=∠NCE.∴∠ACN=∠BCE=90°.∴△ACN为等腰直角三角形.(3)△ACN仍为等腰直角三角形.( 4分 )如图3,∵AD∥EN,∠DAB=90°,∴∠ENA=∠DAN=90°.∵∠BCE=90°,∴∠CBN+∠CEN=360°﹣90°﹣90°=180°.∵A、B、N三点在同一条直线上,∴∠ABC+∠CBN=180°.∴∠ABC=∠NEC.∵△ADM≌△NEM(已证),∴AD=NE.∵AD=AB,∴AB=NE.∴△ABC≌△NEC.∴AC=NC,∠ACB=∠NCE.∴∠ACN=∠BCE=90°.∴△ACN为等腰直角三角形.( 4分 )试题29答案:(1)当时,四边形PQCM是平行四边形;(3分)(2)过P作PE⊥AC,交AC于E,∵ PQ∥AC,∴△PBQ∽△ABC,∴△PBQ是等腰三角形,∴PQ=PB=t,∴∴BF=,∴FD=8-,又∵MC=AC-AN=10-2t,∴(3分)(3)∵S△ABC=,∴当y=S△ABC时,,即,解得(舍去)(3分)(4)假设存在某一时刻t,使点M在线段PC的垂直平分线上,则MP=MC,过M作MH⊥AB,交AB于H,则△AHM∽△ADB,∵在Rt△HMP中,,又∵,由解得:(舍去),∴当时,点M在线段PC的垂直平分线上.。

江苏省盐城市2020年中考一模英语试卷分类汇编:首字母填空

江苏省盐城市2020年中考一模英语试卷分类汇编:首字母填空

江苏省盐城市2020年中考一模英语试卷分类汇编首字母填空江苏省盐城市初级中学2019-2020学年第二学期初三第一次模拟英语试卷C.根据短文内容及首字母提示,填写所缺单词,使短文意思完整。

(每空一词)This year, the Spring Equinox(春分), the fourth of the 24 solar terms, falls on March 20. It m 1 the most lively days of spring have come.The Spring Equinox marks the point when day and n 2 equally divide the whole day. After this day , daytime will last l 3 than night. Therefore, it is not only important in China, but also in many other c 4 around the world. Spring Equinox Day is a public holiday in Japan. In Iran , it is called "Nowruz ", which is also known as the Iranian New Year.Spring Equinox is the best time for going for a picnic, admiring flowers and flying kites in China. There are also activities that have been kept o 5 centuries , such as balancing eggs . The idea is that on Spring Equinox, Earth's axis(轴)is perpendicular(垂直的)to the sun. So Earth is more balanced on this day. It's usually very h 6 to balance an egg because the yolk(蛋黄)is off-center. But on Spring Equinox it is believed that there are some special gravitational forces(引力)that can h 7 . However, this isn't true. If you are careful e 8 , you can actually balance an egg on its end any day of the year. All you need is a lot of p 9 . But balancing eggs is still a fun tradition for people. In some places , people p 10 the eggs in many colors and hold egg-balancing competitions.答案:1-5 means night longer countries over6-10 hard help enough practice paint分析:文章主要介绍了二十四节气中的春分以及诸如立鸡蛋等相关的习俗。

江苏省盐城市建湖县汇文实验初中教育集团2019~2020学年度第一学期9月考九年级物理

江苏省盐城市建湖县汇文实验初中教育集团2019~2020学年度第一学期9月考九年级物理

建湖县汇文实验初中教育集团2019~2020学年度第一学期九年级“学情调研”物理练习题(总分:100分练习时间:90分钟)一、选择题(24分)1.如图所示的工具是人们在日常生活里常见的,其中能省距离的是(▲)2.今年国庆70周年期间,小明爸爸开了一瓶啤酒表示庆贺,瓶盖的起子可以看作是一个杠杆,小明用所学知识画了四幅杠杆示意图,正确的是(▲)A B C D 3.王小鹏同学听到考试预备铃响了,考室还在四楼呀!一口气从一楼跑到四楼考室,所用时间为30秒。

他上楼过程克服自身重力做功的功率最接近(▲)A.1500W B.150W C.15W D.1.5W4. 下列情形中,对物体没有做功的是(▲)A.小明用力推汽车没推动B.举重运动员将杠铃举起C.用定滑轮将重物提起D.把物理课本从地面捡起5.如图所示,要使杠杆在水平位置平衡,B处应挂钩码个数为(所用钩码均相同)(▲)A.2个B.3个C.4个D.6个第5题图第6题图第7题图6.皮划艇是我国奥运优势项目之一,如图所示,比赛中运动员一手撑住浆柄的末端(视为支点),另一手用力划浆.下列说法正确的是(▲)A.为省力,可将用力划浆的手靠近支点B.为省力,可将用力划浆的手远离支点C .为省距离,可将用力划浆的手远离支点D .将用力划浆的手靠近支点,既能省力又能省距离7.如图所示,甲、乙两组滑轮组中自由端的拉力F 相同,且机械效率也相同(不计绳重和摩擦),那么关于货物重力G 1和G 2的大小,下列选项中可能的是 (▲) A .G 1=30N ; G 2=30N B .G 1=30N ;G 2=20N C .G 1=20N ; G 2=30N D .G 1=20N ;G 2=20N8.悬挂重物G 的轻质杠杆,在力的作用下倾斜静止在如图所示的位置。

若力施加在A 点,最小的力为F A ;若力施加在B 点或C 点,最小的力分别为F B 、F C ,且AB=BO=OC .下列判断正确的是 (▲) A .F C <GB .F B =GC .F A >GD .F B >F C第8题图 第9题图 第10题图9.如图所示,使用滑轮组提升重物时(不计绳重和摩擦),能提高机械效率的是 (▲) A .减小提升重物的高度 B .减小被提升物的质量 C .减小定滑轮的重力 D .减小动滑轮的重力10.如图所示,细线上端固定,下端拉着小球在竖直平面内摆动,A 、B 是球摆动过程中的最高点,C 是最低点,不计空气阻力.则 (▲) A .球在C 点时速度最大 B .从A 到C ,球的势能增加C .从C 到B ,球的动能增加D .从A 到C 点,球的重力对球不做功11.用水平拉力先后两次拉着重为20 N 的同一物体,沿同一水平面做直线运动.第一次拉力为10 N ,物体恰好做匀速直线运动,拉力对物体做了20J 的功;第二次拉力增大为20 N ,拉力对物体做了48J 的功.分析两次做功过程,以下判断正确的是 (▲) A.第一次物体受到的摩擦力是10 N ,物体运动了1 m B.第一次物体受到的摩擦力是20 N ,物体运动了2m C.第二次物体受到的摩擦力是10 N ,物体运动了2. 4 mD.第二次物体受到的摩擦力是20 N ,物体运动了4.8m12.把篮球抛向空中,忽略空气阻力,如图所示的下列图像能正确反映球离手后至落回地面前,机械能E 与篮球离地高度h 的关系的是 (▲)二、填空题13.图中轻杆OA可绕O点自由转动,用细线将12N的重物挂在A处,在B处用始终竖直向上的拉力提住轻杆,OB和BA长度之比为3:5,轻杆在水平位置平衡时,拉力的大小为▲N,此杠杆提升重物时▲(省/费)距离.若拉力方向变为图中虚线所示方向,则拉力将变▲.第13题图第14题图第15题图第16题图14.如图所示,工人用动滑轮(不计绳重和摩擦,物重大于动滑轮重)匀速提升重物,人的拉力▲ (大于/等于/小于)物体重力,物体升高的距离▲(大于/等于/小于)绳子自由端移动的距离.人拉力做的功▲(大于/等于/小于)重物增加的重力势能.15.如图所示,将一个重3N的物体匀速拉到斜面顶端,人沿斜面向上的拉力为2N,物体沿斜面移动的距离为0.8m,上升的高度为0.4m,则物体重力做功为▲J,分析数据可知利用斜面▲(能/不能)省功,斜面的机械效率是▲.16.在“探究动能大小与哪些因素有关”的实验中,让质量不同的小车从同一斜面的同一高度由静止滑下,撞击木块,这是为了研究▲对动能大小的影响,得出的结论是▲.小车最终静止,在这一过程中,小车的机械能▲(变大/变小/不变).17.一辆汽车以20 m/s的速度在水平路面上沿直线匀速行驶5 min,汽车质量为1 500 kg,行驶时所受阻力为车重的0. 2倍,则牵引力为▲N,此时汽车的功率为▲kW,重力做的功为▲J. (g取10 N/kg)18.如图,是一只皮球从空中下落又上升的一系列过程,皮球形变最大后反弹的过程:▲能转化为___▲__ 能;皮球从空中下落又上升的一系列过程中,皮球的机械能▲(增大/减小/不变)。

江苏省建湖县汇文实验初级中学2019-2020学年九年级下学期第一次线上月考数学试题(word无答案)

江苏省建湖县汇文实验初级中学2019-2020学年九年级下学期第一次线上月考数学试题(word无答案)

江苏省建湖县汇文实验初级中学2019-2020学年九年级下学期第一次线上月考数学试题(word无答案)一、单选题(★) 1 . 的倒数为().A.B.C.D.2020(★) 2 . 下列各式中正确的是()A.B.C.D.(★★) 3 . 一元二次方程的根的情况是()A.有两个不相等的实数根B.有两个相等的实数根C.只有一个实数根D.没有实数根(★★) 4 . 不等式组的解集,在数轴上表示正确的是( )A.B.C.D.(★) 5 . 小明15元买售价相同的软面笔记本,小丽用24元买售价相同的硬面笔记本(两人的钱恰好用完),已知每本硬面笔记本比软面笔记本贵3元,且小明和小丽买到相同数量的笔记本,设软面笔记本每本售价为元,根据题意可列出的方程为( )A.B.C.D.(★★) 6 . 已知关于的分式方程的解为正数,则的取值范围为()A.B.且C.D.且二、填空题(★★) 7 . 因式分解:y﹣xy= .(★) 8 . 若有意义,则的取值范围是___________(★) 9 . 已知代数式x 2﹣4x﹣2的值为3,则代数式2x 2﹣8x﹣5的值为_____.(★★) 10 . 如图,无人机于空中处测得某建筑顶部处的仰角为,测得该建筑底部处的俯角为.若无人机的飞行高度为,则该建筑的高度为__ .(参考数据:,,)(★★) 11 . 已知关于x的不等式组的整数解共有5个,则a的取值范围是.(★★) 12 . 关于x的一元二次方程的两个不相等的实数根都在-1和0之间(不包括-1和0),则a的取值范围是 ___________三、解答题(★★) 13 . 解不等式组,并写出它的所有负整数解(★) 14 . 先化简,再求值:,其中.(★) 15 . 已知关于x的一元二次方程2x 2+(m﹣2)x﹣m=0.(1)求证:不论m取何值,方程总有实数根.(2)若该方程的两根互为相反数,求m的值.(★★) 16 . 如图, AD是△ ABC的中线,,,.求:(1) BC的长;(2)∠ ADC的正弦值.(★★) 17 . 某体育看台侧面的示意图如图所示,观众区 AC的坡度 i为1:2,顶端 C离水平地面 AB的高度为10 m,从顶棚的 D处看 E处的仰角α=18°30′,竖直的立杆上 C、 D两点间的距离为4 m, E处到观众区底端 A处的水平距离 AF为3 m.求:(1)观众区的水平宽度 AB;(2)顶棚的 E处离地面的高度 EF.(sin18°30′≈0.32,tan l8°30′≈0.33,结果精确到0.1 m)(★★) 18 . 超市销售某种儿童玩具,如果每件利润为40元(市场管理部门规定,该种玩具每件利润不能超过60元),每天可售出50件.根据市场调查发现,销售单价每增加2元,每天销售量会减少1件.设销售单价增加元,每天售出件.(1)请写出与之间的函数表达式;(2)当为多少时,超市每天销售这种玩具可获利润2250元?(3)设超市每天销售这种玩具可获利元,当为多少时最大,最大值是多少?(★★★★) 19 . 如图,四边形 ABCD内接于⊙ O, AB=AC,BD⊥ AC,垂足为 E,点 F在 BD 的延长线上,且 DF= DC,连接 AF、 CF.(1)求证:∠ BAC=2∠ DAC;(2)若 AF=10, BC=4 ,求tan∠ BAD的值.(★★) 20 . 如图抛物线经过点,tan∠CAB=3,且.(1)求抛物线的解析式及其对称轴;(2)点为抛物线上一点,连接,直线把四边形的面积分为两部分,求点的坐标.。

2019-2020学年江苏省盐城市建湖县汇文实验中学九年级(下)月考化学试卷

2019-2020学年江苏省盐城市建湖县汇文实验中学九年级(下)月考化学试卷

2019-2020学年江苏省盐城市建湖县汇文实验中学九年级(下)月考化学试卷一、选择题。

1.(2分)下列各组物质按照氧化物、酸、碱、盐的顺序排列的是()
A.氧化钠、硫酸、石灰水、硝酸钾
B.氧化镁、硫酸铜、氢氧化钠、大理石
C.生石灰、盐酸、熟石灰、小苏打
D.氯化氢碳酸、烧碱苏打
2.(2分)下列物质需要密封保存的原因,与空气中的水蒸气无关的是()
A.氧化钙B.浓盐酸C.浓硫酸D.氢氧化钠
3.(2分)复合肥能提供几种养分,给农作物以“全面呵护”.下列属于复合肥的是()A.硫酸钾[K2SO4]B.磷酸二氢铵[NH4H2PO4]
C.尿素[CO(NH2)2]D.硝酸铵[NH4NO3]
4.(2分)下表中知识的归纳错误的一组是()
A 环保焚烧法处理废旧塑料
化肥农药任意使用
B
健康
糖类、油脂﹣﹣组成元素相同
缺铁﹣﹣会引发缺铁性贫血
C 安全煤气泄漏:先开窗通风,关闭阀门
进入陌生溶洞前:先做灯火试验
D
材料
黄铜、不锈钢﹣﹣都属于合金
塑料、尼龙﹣﹣都属于合成材料
A.A B.B C.C D.D
5.(2分)医学界研究表明,如果人体不缺乏微量元素而随意过量补充,不仅对健康无益,反而有害.下列元素属于人体中微量元素的是()
A.碳B.碘C.氧D.氢
6.(2分)用水作试剂,不可能区分开来的一组物质是()
A.生石灰、食盐、烧碱
B.汽油、酒精、浓硫酸
C.无水硫酸铜、碳酸钙、碳酸钠
D.氯化钾、硝酸钠、硫酸钾
7.(2分)下列“家庭小实验”不能达到预期目的是()
A.用柠檬酸、果汁、白糖、水、小苏打等制汽水。

江苏省建湖县汇文实验初级中学2019届九年级下学期第一次月考道德和法治试题(无答案)

江苏省建湖县汇文实验初级中学2019届九年级下学期第一次月考道德和法治试题(无答案)

建湖县汇文实验初中2018~2019学年度第二学期九年级阶段性检测道德与法治练习题班级:___________ 姓名:___________ 学号:___________一、单项选择题(每小题只有一个最符合题意的答案,请选出正确答案并将其涂在答题卡上。

每小题2分,共28分)()1.一年来,被誉为“世界经济风向标”的达沃斯论坛,持续释放出“构建人类命运共同体”的话语风向;联合国舞台上,“构建人类命运共同体”理念一次次被写入重要决议之中。

令世人同感欣慰的是,在“世界怎么了、我们怎么办”的普遍困惑面前,中国理念之光,照亮了人类发展前程...上述材料主要表明A. 人类共享一个地球,消除差异才能共生B. 和平发展时代主题,霸权强权不合时宜C. 和平合作勇担责任,和谐世界中国梦想 D.大幅提升国际地位,主导全球舍我其谁()2.作为世界上最大的发展中国家,我国为推动人类命运共同体,促进世界共同发展作出积极努力。

下列事件体现这一做法的是A.广西举办“自治区成立60周年”成就展B.博螯亚洲论坛2018年年会在海南举办C.全国各地陆续开展“礼让斑马线”专项整治行动D.我国进一步加强社会主义核心价值观网上传播()3.宁夏固原市隆德县的杨国权,二十多年前开始自学剪纸,他不喜欢打牌、喝酒,把所有时间都省出来构思剪纸。

近日,他耗时三年完成长达8.3米的《清明上河图》。

这启示我们A. 职业有分工,身份有贵贱B. 成功的关键就在于上名校C. 弘扬工匠精神,实现人生价值D. 任何人只要努力就能成功()4.当我们发现自己的理想因为各种原因难以实现时,应该A.对自己的理想进行适当调整,以缩短与现实之间的距离B.面对现实,放弃所有的理想C.坚持不懈,固守既定的目标D.停在远处,随波逐流()5.我国宪法第一条明确规定:“中华人民共和国是工人阶级领导的,以工农联盟为基础的人民民主专政的社会主义国家。

”这是对我国A.公民基本权利的规定B.国家性质的规定C.社会主义政治制度的规定D.公民当家作主地位的规定()6.下列符合漫画《根深叶茂》寓意的是A.跟其他法律相比,宪法是最严厉的法律B.只有宪法才能规定国家生活中的根本问题C.在法律效力上,宪法和其他宪法不分伯仲D.民法、行政法等法律是宪法在某一方面的具体化()7.下列不属于我国公民的基本义务的是A.维护国家统一、民族团结B.遵守宪法和法律C. 维护国家安全、荣誉和利益D. 民主监督()8.2019年2月,黄某在微信群里转发恐怖血腥视频,违反了《中华人民共和国反恐怖主义法》,被警方依法行政拘留。

江苏省建湖县汇文实验初中教育集团2021届九年级十二月份学情调研考试语文试题

江苏省建湖县汇文实验初中教育集团2021届九年级十二月份学情调研考试语文试题

建湖县汇文实验初中2020~2021学年度第一学期九年级十二月份学情调研考试语文试卷(试卷满分150分,考试时间140分钟)一、积累与运用(35分)1.古诗文默写(10分)①善学者尽其理,。

《荀子·大略》②,西北望,射天狼。

(苏轼《江城子·密州出猎》)③四面歌残终破楚,。

(秋瑾《满江红》)④溪云初起日沉阁,。

(许浑《咸阳城东楼》)⑤,夜吟应觉月光寒。

(李商隐《无题》)⑥爱上层楼, 。

(辛弃疾《丑奴儿》)⑦读诗歌,就是在触摸诗人的情怀,读范仲淹的《渔家傲秋思》从“,”中感受将士们浓重乡思与爱国激情的矛盾情绪;读辛弃疾的《破阵子为陈同甫赋壮词以寄之》从“,”中体会诗人渴望报效朝廷、建立功名的抱负。

2.阅读下面的文字,按要求答题。

(6分)盐城—大美湿地, A (物产丰富,人民生活富足)。

放眼条子泥湿地,黄与绿主宰着,广mào()无垠,坦荡如砥;其生态独特性,在中国乃至全世界,都曲指可数。

582公里,每一天,盐城从那宽阔绵延的海岸线开始醒来。

丹顶鹤翩翩起舞;麋鹿萧洒漫步;勺嘴鹬悠然qī()息,……它们的自在生活,诠释着这里的盎然生机。

(1)根据拼音写汉字。

(2分)广mào()无垠悠然qī()息(2)找出文中的两个错别字,并将之改正。

(2分)改为改为(3)A处的成语是(2分)3. 下列加粗成语使用正确的一项是()(2分)A. 那些出于猎奇心理而孜孜不倦地去食用野生动物的人真是可恶,害人害己,我们一定要引以为戒。

B. 此次冠状肺炎传染性极高,一时间,各大商场万人空巷,大家都积极响应国家的号召,呆在家里,不去人多的场所。

C. 2003年,钟南山面对“非典”临危不惧,2020年,他又不顾80多岁的高龄,毅然决然赶赴中心疫区,为防控疫情殚精竭虑,也正因为如此,钟南山赢得了“国士无双”的赞誉。

D. 疫情一开始爆发,举国上下所有的医护人员草木皆兵,兢兢业业,放弃了休息的时间,奋斗在一线,着实令我们动容。

江苏省盐城市建湖县汇文实验初中教育集团2019--2020学年度第一学期9月考九年级英语

江苏省盐城市建湖县汇文实验初中教育集团2019--2020学年度第一学期9月考九年级英语

建湖县汇文实验初中教育集团2019--2020学年度第一学期九年级“学情调研”英语练习题(总分:140分考试时间:120分钟)一、听力(共20题, 每小题1分,计20分)A.听对话回答问题。

( ) 1. What is the girl’s problem?A B C( ) 2. What’s the man’s animal sign?A B C( ) 3. Where are the two speakers talking now?A B C( ) 4. What’s the girl’s favourite subject?A B C( ) 5. How often does Jim play basketball?A.Every day.B. Twice a week.C. Never( ) 6. What does the girl want to be when she grow up?A.An engineerB. A youth workerC. A doctor( ) 7. What does the woman prefer to do?A.To do some shopping.B. To visit the museum.C. To see the new play. ( ) 8. What colour is Jack’s pen?A.Blue. Black. C. Black and blue.( ) 9. Does Tom believe in star signs?A.Yes, he does.B. No, he doesn’t.C. We don’t know. ( ) 10. What is the woman going to do tomorrow?A.Meet friends.B. Stay at home.C. Plant trees.B.听对话和短文回答问题(计10分)听第一段对话,回答第11-12小题。

江苏省盐城市建湖县汇文实验初中教育集团2019-2020学年下学期模拟检测九年级语文试题(含答案)

江苏省盐城市建湖县汇文实验初中教育集团2019-2020学年下学期模拟检测九年级语文试题(含答案)

建湖县汇文实验初中2019-2020学年春学期模拟检测九年级语文试题(卷面总分:150分考试时间:150分钟)一、积累与运用。

(40分)1.古诗文名句及常识填空。

(10分)(1)我是你的十亿分之一,________________________。

(舒婷《祖国啊,我亲爱的祖国》)(2)俱怀逸兴壮思飞,________________________。

(李白《宣州谢朓楼饯别校书叔云》)(3)古今多少事,________________________。

(陈与义《临江仙·夜登小阁,忆洛中旧游》)(4)________________________,却话巴山夜雨时。

(李商隐《_______________》)(5)持节云中,________________________?(苏轼《江城子·密州出猎》)(6)夏完淳的《别云间》表达诗人至死不渝的战斗精神,坚决抗清的豪情壮志的诗句是:________________________,________________________。

(7)刘禹锡《酬乐天扬州初逢席上见赠》中的“________________________,________________________”,以生动的艺术形象,表现出积极进取的人生态度,揭示了新陈代谢的自然规律。

2.阅读下面文字,完成后面3小题(7分)有的所错过的,时不复反,机不再来,属于永远的错过,但因为你善于细细咀嚼这错过的苦果,竟能从惆怅中升华出憬悟,乃至于niàng出诗意与哲理……你的生命,或许反更有厚度;你的心灵,或许反更有虹采;________________________。

(1)根据注音写汉字,根据汉字写拼音。

(2分)咀嚼.()niàng()(2)上面这段文字中有两个错别字,请把它们找出来并订正(2分)________改为________________改为________(3)“升华出憬悟”中的“憬悟”的意思是________________________(1分)(4)请仿照划线句子,再写一句:_______________,______________________________。

江苏省盐城市建湖县汇文实验初中2019届九年级下学期第一次阶段性检测英语试题(原卷版)

江苏省盐城市建湖县汇文实验初中2019届九年级下学期第一次阶段性检测英语试题(原卷版)

江苏省盐城市建湖县汇文实验初中2019届九年级下学期第一次阶段性检测英语试题一、单项选择1.I enjoy having ________ breakfast with my family at home. It makes me feel relaxed.A. aB. anC. theD. /2.–I don’t think you take the game seriously.—Oh, it’s not a match. We’re playing chess just for ______.A. habitB. funC. hobbyD. game3.-Two tickets for Sunday,please!-Sorry.There is ____left.A. nothingB. noneC. someD. anything4.-- Do you love the poems by Li Qingzhao?-- Yes, a little. But I prefer those by Du Fu because can cheer me up.A. itB. heC. sheD. they5.--- Where is Jinyi International Cinema? ---It’s ______ of our school.A. south-eastB. the south-eastC. to south-eastD. in the south-east6.—Listen! Who is singing in the next room? —It must be Sally. I often hear her ______ there.A. singingB. singsC. to singD. sing7.--The temperature is only 10℃ today. --Yes. strange the weather is in Jianhu this year!A. HowB. How aC. WhatD. What a8.Life is like a journey. _______ ahead , and you will see a lot more beautiful sceneries(风景).A. PlanB. To planC. PlanningD. Plans9.It’s ____time for me to visit the Guanyin Lake.A. fiveB. the fiveC. fifthD. the fifth10.--- Your bedroom is so dirty. _____ all the rubbish, Peter.--- OK, Mum. I’ll do it right away.A. Put upB. Make upC. Pick upD. Hurry up11.---Why are you buying so much food?--- Because an old friend of _______ is coming to see me this evening.A. meB. mineC. my father’sD. my father12.The famous star Zhang Yixin once said, “As a singer, you____ never be too hard-working.”A. mustB. canC. shouldD. may13.---Where is Frank now? --- He with his friends ____ games in the garden.A. playsB. is playingC. are playingD. play14.Tom will not want to have ______ to do with chess in the future.A. everythingB. somethingC. anythingD. nothing15.—I’m afraid i can’t go to your pa rty.—________________! The party won’t be perfect without you.A. You’re welcomeB. That’s nothingC. What a pityD. It doesn’t matter二、完形填空Daniel was disappointed as he ___16___ out of his 40th job interview. He couldn't believe he had ___17___40 interviews. He just finished his university study and needed to get a job ____18____. He was almost broke(身无分文的). He decided that he would start a____19____project called "Living the Map". He wanted to get 50 jobs in 50 states in only 50___20___.Daniel's idea may sound crazy, ___21___it is really clever. Daniel said that one of his goals was to get as ___22___ job experience as possible. He was still not sure what kind of job he really wanted. The best way to find out was to try out ___23___ types of jobs. So, he tried to get jobs that were close to each state's identity(特点). For example, Michigan is famous ___24___having a lot of car factories, so during his 8th week in Michigan, he worked as an engineer. Wisconsin is known for its cheese, so he was a cheese maker there. In Vermont he made maple syrup, and in Maryland he cooked crab for the patients in a ___25___ .Daniel not only had fun ___26___ all kinds of interesting jobs, but he also made 60,000 dollars and became famous. He plans to publish a book about ___27___he learned from his project. ___28___the beginning, Daniel wanted to be experienced in different jobs, but instead he became famous ,or was he ___29___ to become famous from the beginning? You decide. Whatever he has in mind, it ___30___ that there are many more jobs in his future.16. A. jumped B. ran C. walked D. rolled17. A. succeeded B. changed C. lost D. failed18. A. fast B. slowly C. highly D. happily19. A. interesting B. new C. complete D. boring20. A. months B. minutes C. weeks D. days21. A. although B. but C. so D. even22. A. little B. few C. many D. much23. A. same B. similar C. different D. creative24. A. as B. of C. on D. for25. A. restaurant B. hospital C. company D. school26. A. to try B. tried C. trying D. try27. A. that B. which C. what D. where28. A. From B. In C. Of D. On29. A. hoping B. hoped C. to hope D. hopeful30. A. like B. likes C. looks D. seems三、阅读理解ANew York is 3 hours ahead of California but it does not make California slow. Someone graduated at the age of 22, but waited 5 years before getting a good job! Someone became a CEO at 25, and died at 50While another became a CEO at 50, and ▲ to 90 years. Someone is still single, while someone else got married. Obama retires(退休) at 55, but Trump starts at 70 Absolutely everyone in this world works based on their Time Zone.People around you might seem to go ahead of(在….前) you, some might seem to be behind you. But everyone is running their own RACE, in their own TIME.Don’t envy them or laugh at them. They are in their TIME ZONE, and you are in yours! Life is a bout waiting for the right moment to act. So,RELAX. You’re not LATE.You’re not EARL Y.You are very much ON TIME, and in your TIME ZONE.31. We can know that when it’s 6 a.m. in New York, it’s ______ in California.A. 9 a.m.B. 9 p.m.C. 3 a.m.D. 3 p.m.32. Who is the President of the USA now?A. ObamaB. TrumpC. ClintonD. Bush33. If someone is ahead of or behind you, you shouldn’t ______them.A. be worried aboutB. feel happy forC. get angry withD. envy or laugh at34.The best word for the blank in the poem is ______. A. born B. grew C. lived D. married 35. What can we learn from the poem? A. Obama starts at 55,but Trump retires at 70. B. Life is all about waiting for time zones. C. The earlier we succeed, the better we will be. D. Don’t hurry and take your own steps. B Humans are land animals, but we are also closely connected to the sea. In history, the sea has given a lot to mankind.The sea has provided man with food and a better way to travel to different parts of the world.In the modern world, the sea offers many resources to help mankind survive. Resources on land are going to meet the end. The sea, however, still can be hoped to satisfy man's needs.The list of riches of the sea to be developed by man's technology is amazing. Oil and gas explorations have been carried out for nearly 30 years. Valuable minerals on the ocean floor are ready to be mined(开采).Fish farming promises to be a good way to produce plenty of food. The culture of fish and shellfish is an ancient skill practiced in the past mainly by eastern people.Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warm temperature of the ocean can be used in a way similar to the steam(蒸汽) in a steamship. Ocean waves offer possible use as a source of energy. Technology allows man to explore more deeply under the sea. The development of strong, new materials has made this possible.The technology to harvest the sea continues to improve. Scientists believe that by the year 2050 the problems that prevent us from making full use of the food, minerals, and energy sources of the sea will be largely solved.36. According to the passage, which is not in the list of the riches of the sea?A. Ocean windsB. MineralsC. Fishes and shellfishesD. Oil and gas37. When will the problems to explore the deeper sea largely possibly be solved?A. In the next century.B. At the end of the 20th century.C. By the middle of the 21st century.D. In a couple of years.38. Why does the writer mention a steamship in paragraph 5?A. To show that a steamship is better than other kinds of ships.B. To explain that man can make use of sources of energy from the sea.C. To argue that man should use steamships.D. To describe that it is warmer in the ocean than on land.39. What is the best title for the passage?A. Needs of Man.B. Sea and Sources of Energy.C. Sea Exploring Technology.D. Sea Harvest and Food.40. We can conclude(得出结论) from the passage that ______.A. harvesting rice in the sea will be made possibleB. technology for exploring the sea has been solvedC. in the near future man can live on the ocean floorD. humans haven’t fully m ade use of the riches of the seaCI remembered I had a gun if I needed it,and turned back towards this man of the island. He was hiding behind another tree but stepped out to meet me.‘Who are you ? ’I asked, staring at him.‘Ben Gunn ,’he answered, and his voice sounded rough and strange .His skin was burnt nearly black by the sun and his clothes were made from pieces of a ship's sail. ‘Poor Ben Gunn,’ he went on. ‘Alone for three years.’‘Were you shipwrecked(船遇难)?’I asked.‘No ,my friend,’ he said. ‘Marooned.’I had heard the word before, and knew it meant a cruel(残忍的)punishment often used by pirates(海盗)-leaving a man alone on some distant, empty island.‘Marooned for three years, ’he continued,‘ living on wil d goats and fish. But I'm in a great need for real English food back home. You don't have a piece of cheese, do you? Many nights I've dreamed of cheese.’He continued. ‘Well, tell me your name. ’‘Jim,’ I told him.‘Well, Jim,’ he said, looking around and lowering his voice to a whisper, ‘I'm rich.’ I was now sure the poor man was crazy ,but he repeated his words. ‘Rich, I say! Now ,Jim ,that isn't Flint's ship, is it?’I began to think that I had found a friend, and I answered him at once. ‘It's not Flint's ship any more. Flint is dead, but there are still some of Flint's men aboard, and that's bad news for us.’‘A man with one leg?’ he asked, fear in his voice.‘Silver?’I asked.‘Yes ,Silver,’ he said, ‘that was his name.’‘He's the cook, and their leader ,too.’ And I told him the fight between Flint and the cook, and the danger we were now in.‘You're in trouble, Jim,’ he said when I'd finished. ‘Well, Ben Gunn will help you. Will your squire(乡绅) be generous if I do, do you think? I don't want him to give me a job, but will he give me one thousand pounds out of money that's really mine?’‘I'm sure he will,’ I said. (Adapted from Treasure Island)41. What were Ben’s clothes made of?A. a fishing netB. a piece of ship's sailC.a piece of old clothD. a blanket 42. What is the correct order of the story? ①Jim met Ben on the island. ②Ben wanted to get his 1000 pounds. ③Silver became the leader of the ship. ④Flint was dead. A. ①④③② B. ①④②③ C. ④①③② D. ④③①②43. What does underlined word ‘Marooned’ mean ________ in the passage?A. 绞刑 B. 释放 C. 流放 D. 谋杀44. From Ben’s words, he probably came from_________.A. America B. Brazil C. Britain D. France 45. It can be inferred(推断)from the passage that___________. A. Ben was marooned for 3 years on the island. B. Ben became a rich man with the help of Jim.C. Jim and Ben used to work on Flint’s ship.D. Silver was an awful man and perhaps he had Flint killed.阅读下面短文,根据所读内容,在文章后的空格里填入一个最恰当的单词。

江苏省建湖县汇文实验初中教育集团2020届九年级下学期期中模拟英语试题

江苏省建湖县汇文实验初中教育集团2020届九年级下学期期中模拟英语试题

2019-2020学年第二学期期中考试九年级英语模拟试题(总分140分,考试时间120分钟)命题人:审核人:班级______ 姓名_______ 学号______第I卷(选择题,共80分)一、听力(每小题1分,共20分)A、听下面10段短对话,每段对话后有一个小题,从题中A、B、C、三个选项中选出最佳选项。

听完每段对话后,你都有5秒钟的时间来回答有关小题和阅读下一小题。

每段对话读两遍。

听第1至10段材料,回答1至10小题。

( )1. What does David want to be when he grows up?( )2. What does the boy usually do at 7 in the morning?( )3. What was the man doing at four yesterday afternoon?( )4. When will the woman return home?( )5. How does Bob feel about the math exam?A. Worried.B. Relaxed.C. Confident.( )6. How does Daniel feel about the coming English competition?A. Confident.B. Nervous.C. Stressed.( )7. How much should the woman pay for the tickets?A. 78 Yuan.B. 92 Yuan.C. 117 Yuan.( )8. What did the man do yesterday evening?A. He played ping-pong.B. He went to a meeting.C. He did housework at home. ( )9. When did the woman go to bed yesterday?A. At 10 p.m.B. At 11 p.m.C. At midnight.( )10. Why can’t the two speakers understand what the English teacher says?A. Because he speaks too fast.B. Because they are not good at English.C. Because he doesn’t speak clearly enough.第二部分听对话和短文回答问题这一部分你将听到一段对话和两篇短文、各听两遍。

江苏省建湖县汇文实验初级中学2019-2020学年第二学期九年级第一次线上月考英语试题(word版无答案)

江苏省建湖县汇文实验初级中学2019-2020学年第二学期九年级第一次线上月考英语试题(word版无答案)

2019-2020学年第二学期线上学习学情检测九年级英语试题(总分100分,考试时间80分钟)一、单项填空(共15题,每小题1分,满分15分)( )1.Earth is only home to everyone.Let’s try to make it greener world to live in.A. a;aB. the;aC. a;theD. the;the( )2.一_______unusual music he is playing!一Yes, all of the students are losing themselves in it.A. HowB. How anC. WhatD. What an( )3.The number of the people using Huawei is getting larger and larger.A.culturesB.customersC.productsD.histories( )4.The total number of online literature website users had to 352 million by the end of June 2019.And the number is still growing.A.increasedB.influencedC.includedD.introduced( )5.Of all the festivals ____we Chinese people celebrate,my favorite is the Mid-Autumn Festival.A. whichB. thatC. whatD. when( )6.—Did you talk back to your mother when you were a child?—Yes. But now I realize I was wrong. I really regret that silly thing to my mum.A.doB.to doC.doingD.did( )7.It's reported that boys usually copy the behavior of their fathers', and girls usually copy_________ of their mothers'.A. thatB. thoseC. oneD. it( )8. As far as we know, safety comes first you do.A.wheneverB.whoeverC.whereverD.whatever( )9. --Can you go to the movies with me tonight? --I have to ask my mum. If I_______, I will go with you.A.allowB. allowedC. am allowedD. was allowed( )10.The teacher along with the students______ discussing the Reading Skills that was newly published in America in the classroom now.A.are B.were C. is D. was( )11.—Could you tell me how I can improve my English?—Sure. , you could speak it as much as possible.A.After allB.In the endC.By the wayD.First of all( )12.______ people prefer HUAWEI phones, and about______of them are adults.A. The number of; four-fifthsB. A number of; four-fifthC. A number of; four-fifthsD. The number of; four-five( )13. He explained again and again in order to make what he did ________.A. understandB. understoodC. to understandD. understanding( )14.—Hi, Ken. Did Mrs. Zhang tell us ______? —Yes. She said we should meet there at nine.A. which was the way to the stationB. why we should meet at the stationC. when we should get to the stationD. who we should meet at the station( )15.---Honey, I have to say I can’t go to the party tonight. I’m tired out.----_______. Have some fun!A.Don’t pull my leg.B. Don’t be a wet blanket.C. Don’t be a black sheep.D. Don’t give me the cold shoulder.二、完形填空(共15题,每小题1分,满分15分)As a teenager, I felt I was always letting people down. I was rebellious(叛逆的) on the outside, but on the inside I wanted people to 16 me.Once I left home to hitchhike (搭便车) to California with my friend Penelope. The trip wasn’t 17 and there were many times I didn’t feel safe. Especially,one situation made me 18 for still being alive. When I returned home, I was different — not so outwardly(外表上) sure of myself.I was happy to be home. But then I noticed that Penelope, who was 19 with us, was wearing my clothes. And my family seemed to like her better than me. I wondered if I would be 20 if I weren’t there.I told my mom, and she explained that 21 Penelope was a lovely girl, no one could 22 me.I pointed out, “She is more patient and is neater than I have ever been.” My mom said these were wonderful 23 but I was the only person who could fill my 24 . She made me realize that even with my faults(过错)— and they were many—I was a loved member of the family who couldn’t be replaced.I became a searcher, finding out who I was and what made me unique(唯一的).My 25 of myself was changing. I wanted a solid base to start from. I started to resist (抵制) pressure to 26 in ways that Ididn’t like any more, and I27 who I really was. I came to feel much more 28 that no one can ever take my place.Each of us holds a unique place in the world. You are 29 no matter what others say or what you may think. So forget about being replaced. You 30 be.( )16. A. receive B. replace C. like D. leave( )17. A. hard B. easy C. fun D. long( )18. A. wonderful B. careful C. helpful D. grateful( )19. A. playing B. eating C. staying D. traveling( )20. A. loved B. cared C. missed D. explained( )21. A. although B. while C. as D. unless( )22. A. replace B. compare C. scold D. match( )23. A. times B. qualities C. people D. girls( )24. A. character B. role C. task D. form( )25. A. picture B. sense C. view D. attitude( )26. A. think B. act C. change D. learn( )27. A. hated B. wished C. expected D. celebrated( )28. A.happy B. doubtful C.sure D. lonely( )29. A. special B. sure C. wonderful D. lovely( )30. A. can’t B. shouldn’t C. mustn’t D. needn’t三、阅读理解(共15题,每小题2分,满分20分)(A)If you have your own Acme Rocket Launcher, you can create and send up rockets that show off your personality and creativity.All you need is your Acme Rocket Launcher and a few simple household materials:★a 500ml plastic cola bottle ★scissors ★colored markers★poster board ★glueWhat to do:Step 1 Clean the cola bottle completely and allow it to dry.Step2 Use markers to draw three small triangles ( 三角形) and one large triangle on the poster board. Cutout the triangles.Step3 Roll (卷起) the large triangle so that two of its sides touch and it forms a rocket's nose cone. Glue the sides of the cone so that it holds its shape.Step4 Glue the nose cone to the bottom of the bottle to make the top of the rocket.Step 5 Glue the smaller triangles to the other end of the cola bottle, around its opening. The triangles will be the tail fins.Follow the launching instructions included with your Acme Rocket Launcher and have a blast! ( )31. The main purpose of the text is to .A.introduce the Acme Rocket LauncherB. give instructions on making a rocketB.C. show different kinds of rockets D. encourage 'rocket drawing( )32. Which of the following is TRUE about the bottle?A. It can be of any size.B.It should be clean and dry.C.It must be made of glass.D. It needs to be filled with cola.( )33. The rocket's nose cone is rolled from .A. the cola bottleB. the poster boardC.the large triangleD. a small triangle( )34. What can you get from Step 4?( )35. In which section of a newspaper would you probably read the text?A. Sports News.B. Do It Yourself.C. Job Wanted.D. Lost and Found.(B)“Why do I live? Why do I wish for anything, or do anything? Is there anything my my life that will not be destroyed by my death?” Like Leo Tolstoy, the famous Russian writer, many people ask these difficult questions. Tolstoy spent his whole life trying to answer these difficult questions.As a young man, he thought people could achieve perfection if they tried hard enough. So he worked very hard to be the best in everything. He thought that he would find meaning and truth in success.In the 1850s, Tolstoy wrote his first stories. He wrote about his life in the army. He also told stories about his childhood. These works were published and Tolstoy became a well-known writer.He earned the respect he always wanted. Many rich and smart men met and talked with Tolstoy. Some of them were writers like him. They talked a lot about faith(信仰) and the meaning of life. But soon Tolstoy recognized that these men were not perfect. Now he knew they could not answer his questions about faith.So in the 1860s, Tolstoy tried a different way to find the meaning of life. He opened a school for the children of his serfs— the people who worked on his land. These workers were very poor. He wanted to help them because he thought they were more honest than the rich people he knew.Tolstoy learned a lot from his workers. He understood how they worked hard to support their families. He began to believe that marriage and family would give his life meaning. So in 1862, Leo Tolstoy married a young woman named Sonya Behrs.The next 15 years were the best years of Tolstoy’s life. It was during this time that he wrote his most famous books—War and Peach and Anna Karenin a. Many experts say that War and Peace is one of the greatest books ever written. In these books, Tolstoy believed humans should live a simple life and take care of their families. Tolstoy thought this would satisfy him and bring him happiness.Leo Tolstoy is still a very respected writer today. His faith and writings have influenced many people all over the world.( )36. Which is the correct order of the following events?① Tolstoy served in the army. ② Tolstoy got married.③ Tolstoy wrote War and Peace. ④ Tolstoy opened a school.⑤ Tolstoy became a well-known writer.A. ①⑤③②④B. ⑤①③②④C. ⑤④①③②D. ①⑤④②③( )37. Why did Tolstoy want to be the best in everything when he was young?A. To prepare for his books.B. To show his wisdom.C. To make a lot of money.D. To achieve perfection.( )38. Tolstoy thought he would learn a lot from his workers because they were ________.A. poorB.patientC. friendlyD. honest( )39. According to the passage, which of the following is the most important to Tolstoy?A. Fame(名声).B. Success.C. Wealth.D. Family.( )40. What does the passage mainly talk about?A. Leo Tolstoy: Living for writing.B. Leo Tolstoy: Influencing the world.C. Leo Tolstoy: Being the best in everything.D. Leo Tolstoy: Searching for the meaning of life.(C)“Ghost of the Future!” Scrooge exclaimed, “I fear you more than any ghost I have seen. But as I know your purpose is to do me good, and as I hope to live to be another man from what I was, I am prepared to accept your company, and do it with a thankful heart. Will you not speak to me?”The ghost gave him no reply. It stopped beside one little group of business men. Seeing that the hand was pointed to them, Scrooge advanced to listen to their talk.“No,”said a great fat man with a monstrous chin, “I don’t know much about it, either way. I only know he’s dead.”“When did he die?” asked another.“Last night, I believe.”“Why, what was the matter with him?” asked a third man, taking a vast quantity of snuff out of a very large snuff-box. “I thought he’d never die.”“God knows,” said the first, with a yawn.“What has he done with his money?” asked the fourth man, a red-faced gentleman with a pendulous excrescence on the end of his nose, which shook like the gills of a turkey-cock.“I haven’t heard,” said the first man with the large chin, yawning again. “Left it to his company, perhaps. He hasn’t left it to me. That’s all I know.”This pleasantry was received with a general laugh.“It’s likely to be a very cheap fun eral(葬礼),” said the same speaker, “for upon my life I don't know of anybody to go to it. Suppose we make up a party and volunteer?”“I don’t mind going if a lunch is provided.” said the gentleman with the excrescence on his nose. “But I must be fed, if I make one!”Another laugh.“Well, I am the most disinterested among you, after all,” said the first speaker, “for I never wear black gloves, and I never eat lunch. But I’ll offer to go, if anybody else will. When I come to think of it, I’m not at all sure that I wasn’t his most particular friend; for we used to stop and speak whenever we met. Bye, bye.”Speakers and listeners strolled away, and mixed with other groups. Scrooge knew the men, and looked towards the ghost for an answer.The ghost glided on into a street. Its finger pointed to two persons meeting. Scrooge thought that theanswer might lie here.( )41. How did Scrooge feel when he saw the ghost of the future?A. Bored.B. Fearful.C. Hopeless.D.Shy.( )42. How many businessmen were there in the talk?A. 3B. 6C. 5D. 4( )43. Who was sure to know how the dead man dealt with his money?A.The first businessman.B. The fourth businessman.C. No one.D. All of the businessmen.( )44. What does the underlined word “advanced” in Paragraph 2 mean?A. 停止B. 坚持C.提到D. 前进( )45. What would happen next according to the last paragraph?A. Scrooge would ask the ghost to explain to him.B. The ghost would tell Scrooge the answer directly.C. Scrooge would turn back to ask those businessmen to get the answer.D.Scrooge would listen to the two persons for the possible answer.四、阅读短文,根据内容在文章后表格中的空格里填入一个最恰当的单词。

江苏省建湖县汇文实验初中九年级英语下学期第一次质量监测试题(含听力)

江苏省建湖县汇文实验初中九年级英语下学期第一次质量监测试题(含听力)

江苏省建湖县汇文实验初中2015届九年级英语下学期第一次质量监测试题(分值: 140 分时间:120 分钟)第I卷(选择题,共80分)第一部分听对话,回答问题( )1 What fruit does the man like?( )2 How does Linda's father go to work?( )3 What will the weather be 1ike tomorrow?( )4 Where does the man want to go?( )5.What does Jack like?A. He likes fishing. B. He likes eating fish. C. He likes reading.( )6.What did Tom help his parents do last weekend?A. Clean the yard B. Clean the car.C. Clean the house.( )7.How long has it rained?A. For about three hours.B. For about five hours.C. For about two hours.( )8.Where is the man’s watch made?A. I t’s made in Japan. B. It’s made in Shanghai. C. It’s made in Hong Kong.( )9. What are they talking about?A.The colour of the skirt.B. The price of the skirt.C. The style of the skirt.( )10.What’s the woman doing?A.She is looking for a policeman B. She is on her way home.C.She is asking the way.第二部分听对话和短文,回答问题听一段对话,回答第11~12小题( )11. What is the woman doing?A. She is reading a book. B. She is watching TV. C. She is cooking.( )12. When does the woman want to go? A. 7:00. B. 7:15. C. 6:45.听第一篇短文,回答第13~15小题,完成信息记录表first After you have studied for 13 or so, have a rest bylooking in the long distance.secondDon’t read in the sun or in a poor light; don’t read in bed o r in a moving bus, and keep the book away from your eyes for about a 14third Do 15 every day.( )13. A. half an hour B. an hour C. two hours( )14. A. feet B. foot C. meter( )15. A. morning exercises B. exercises C. eye exercises 听第二篇短文,回答第16~20小题( )16. How many children did the old man have?A. Two. B. Three. C. Four.( )17. Which gift did Jim give his dad?A. A beautiful car. B. A big house. C. A clever parrot.( )18. A parro t was sent to Dad because it could ________.A. sing for Dad B. dance for Dad C. speak to Dad( )19. How did Dad like the car?A. He liked it a lot. B. He didn’t like it at all. C. He thought it was the best.( )20. What happened to the parrot finally?A. Dad cooked and ate it. B.It read books for Dad. C.Dad played happily with it.二、单项选择(共15小题;每小题1分,满分15分)21. Mary, w ho’s __ woman over there? -She’s my mother, __ university teacher. A. the, the B. the, a C. a, the D. the, an 22. On Mother's Day, many children presents of love to their mothers. A. receive B. make C. send D. lend23.—— I heard that Johnson missed the early bus yesterday morning.——Yes. The traffic was very heavy,_______,he didn’t arrive on time.A. so far B. as a result C. by the way D. instead of24.——When did Hong Kong return to our motherland? --_______ July 1st, 1997. A. On B. At C. In D. / 25.——Could you tell me our new library will be completed?——In two years.A. how long B. how soon C. how often D. how far26. My sister is a person. She feels sure about her own ability.A. confident B. selfish C. patient D. humorous 27. Millie, could you help me _________ the map on the wall?A. put on B. put out C. put up D. put off28.——_________ weather it is! We can't go boating on the Shuanghu Park this afternoon.——Don't worry. Let's go to the Science Museum instead.A. What good B. How good C. How bad D. What bad29. The thin woman was seen ______ down Huiwen Road at 10 p. m. last night A. ran B. runs C. running D.to run 30.——Would you like some juice, milk or water?——. I only like some tea.A. Neither B. None C. All D. Both 31.——Excuse me, Miss Tang. I left my homework at home over again!—— __________. Please bring it tomorrow.A. Nice idea B.It doesn’t matter C. Here we go D. No way32. The surface of Mars is ______like the surface of Earth than_____ planet in our solar system (太阳系).A. much; the other B. much; any other C. more; the other D. more; any other 33.——Where is your father? I’m looking for h im everywhere.——He______ my grandmother surfing the Internet on the second floor.A. is teaching B. teaches C. has taught D. taught34. Can you tell me ______the truth?A. if does the teacher know B. the teacher knows ifC. if the teacher knows D. does the teacher if knows35.——My diamond necklace has gone missing. It’s my favourite present from my mother.——_________.A. Never mind B. No problem C.That’s OK.D.I’m sorry to hear that 三.完形填空(每题 1分, 计15分)阅读下面的短文,掌握其大意,然后从短文后各题所给的A、B、C、D四个选项中,选择最佳选项。

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江苏省盐城市建湖县汇文实验初中教育集团2019-2020学年九年级
下学期第一次线上月考化学试题
一、单选题
(★) 1 . 下列选项中物质的名称、俗名、化学式不一致的是()
A.二氧化碳干冰 CO2B.氧化钙熟石灰 CaO
C.氢氧化钠烧碱 NaOH D.碳酸钠纯碱 Na2CO3
(★) 2 . 下列物质的性质不是在化学变化中表现出来的是()
A.浓硫酸能使小木条变黑炭化B.铁粉在潮湿的空气中会生锈
C.浓盐酸易挥发D.煤具有可燃性
(★) 3 . 生活中人们使用碘盐,其中的“碘”指的是()
A.分子B.原子C.离子D.元素
(★) 4 . 下列物质,属于盐的是()
A.大理石B.可燃冰C.乙醇汽油D.碳酸氢钠
(★) 5 . 下列图示实验操作中,错误的是()
A.倾倒液体B.检验氧气已满
D.称里一定质里的氢氧化C.给液体加热

(★) 6 . 硒对人体有防癌、抗癌作用,如图1是硒元素在元素周期表中的部分信息,图2是硒
元素的离子结构示意图,下列说法错误的是()
A.硒是人体必需的微量元素
B.图2表示阴离子
C.硒原子的核内中子数是34
D.硒是非金属元素
(★★) 7 . 下列有关水的说法正确的是()
A.水的天然循环主要是通过化学变化实现的
B.海水中含量第二多的物质是氯化钠,它属于盐
C.电解水时在水中加少量氢氧化钠作催化剂
D.海边的工厂用加热蒸馏海水的方法大量生产淡水
(★) 8 . 物质的用途与性质密切相关,下列说法正确的是()
A.金属镁有银白色金属光泽,可用作照明弹
B.二氧化碳不能燃烧,不支持一般物质燃烧,密度比空气大,可用来扑灭一般火灾
C.氢氧化钠溶液有碱性,可用来治疗胃酸过多症
D.金刚石是天然存在的硬度最大的金属单质,可用于切割大理石
(★★) 9 . 现把甲、乙、丙三种金属分别加入稀硫酸中,甲乙表面有气泡产生,丙无变化;再把甲放到乙的硝酸盐溶液中,甲表面析出乙。

则三种金属的活动性顺序是()
A.甲>乙>丙B.乙>甲>丙C.丙>甲>乙D.丙>乙>甲
(★★) 10 . 小明设计了趣味实验装置(见图),其气密性良好。

若要使B中尖嘴导管有“喷泉”产生,则A中加入的固体和液体可能是()
A.氯化钠和水B.硝酸铵和水C.铜和稀硫酸D.氧化钙和水(★★) 11 . 下列鉴别物质的方法中错误的是()
A.用水鉴别硝酸铵和氢氧化钠两种固体
B.用在氧气流中灼烧的方法鉴别真假黄金
C.用灼烧并闻气味的方法鉴别羊毛和兔毛
D.用二氧化碳鉴别澄清的石灰水和氢氧化钠溶液
(★★) 12 . 下列四个图象中,能正确表示对应变化关系的是()
A.向一定量稀盐酸中加水稀释
B.一定温度下,不饱和氯化钠溶液中加入氯化钠
C.室温时,向一定量的稀盐酸中加入少量镁条
D.用等质量、等浓度的双氧水分别制取氧气
(★★) 13 . 绿原酸(C 16H 18O 9)被誉为“第七类营养素”,可从栽种较广的杜仲(中药材)中提取。

下列有关绿原酸的说法不正确的是()
A.一个绿原酸分子中含有43个原子
B.在一定条件下,绿原酸在充足的氧气中可燃烧生成CO2和H2O
C.绿原酸中碳元素质量分数最大、氢元素质量分数最小
D.绿原酸的水溶液,若不知溶质的质量分数,则无法计算溶液中氢氧元素的质量
(★★★★)14 . 除去下列混合物中的杂质(括号中为杂质),所选的除杂试剂正确的是()序号物质除杂试剂
A Fe粉末(Fe2O3)足量的盐酸
B FeCl2溶液(CuCl2溶液)足量锌粒
C Na2SO4(CuSO4)溶液过量NaOH溶液
D CuSO4溶液(H2SO4)足量的氧化铜
A.A B.B C.C D.D
(★★★★) 15 . 有一已部分氧化的镁带12克(假设不含其他杂质),其中氧元素的质量分数为20%,加入到足量的稀硫酸中充分反应,得到的硫酸镁的质量为()
A.24克B.23.2克C.32.2克D.48克
二、综合题
(★★★★) 16 . 如图所示是一种常见水壶,请回答下列问题:
(1)酚醛塑料手柄属于 _____ 材料(选填“合成”“天然”),它具有的性质是 _____ (选填“热固性”“热塑性”)
(2)不锈钢外壳属于 _____ (选填“复合材料”“金属材料”)。

(3)这种水壶中含有地壳中含量第二多的金属元素,其元素符号是 _____ 。

(4)水壶烧水后结水垢,水垢的主要成分是Mg(OH) 2和 _____ 。

可以用盐酸去除水垢,写出其中发生的中和反应的化学方程式 _____ 。

(5)有A、B、C、D四种物质,如图所示,A、B、C在一定下可以发生转化,在C溶液中通入CO 2,溶液变浑浊,生成白色沉淀
A.D与A、B、C均能发生反应,D与C发生中和反应,D与A反应有CO2气体产生。

①请根据已知条件推断四种物质的化学式:
A _____
B _____
C _____
D _____ 。

②请写出B与D反应的化学方程式:_____ 。

(6)下面是某同学对所学物质的分类归纳,请仔细分析并回答下列问题:
①写出C组物质所属的类别_____ 。

②在分类所列举的物质中,有一种物质归类错误,这种物质是_____ 。

③A组物质中的MgO中的阳离子符号为_____ 。

④D组物质KMnO 4中Mn的化合价为_____ 。

⑤在分类所列举的物质中,单质铝能与足量氢氧化钠溶液反应,方程式为2Al+2NaOH+2H 2O =2NaAlO 2+3X↑,则X的化学式为 _____ 。

三、实验题
(★★★★) 17 . 下图为实验室中常用装置。

请回答下列问题:
(1)装置A中仪器①的名称是 _____ ,装置A用于过氧化氢溶液制取氧气时,反应前仪器①
中加入的固体是 _____ ;检查装置B的气密性时,在b处接一根伸入水中的导管,然后用手握
住试管,观察到水中导管口有气泡冒出,说明装置气密性良好,这利用了 _____ (选填序号“a.
分子变大”“b.分子在不断运动”“c分子间有间隔”)
(2)实验室用高锰酸钾制取并收集较纯净的氧气所选用的装置是 _____ (填装置字母),该反
应的化学方程式为 _____ 。

如果用C装置收集氧气,如何检验氧气已经收集满 _____ ;已知锰酸钾可与稀硫酸反应生成二氧化锰(不溶于水和稀硫酸)和硫酸钾(易溶于水)等物质,为了
从制取氧气后的残渣中回收更多的二氧化锰,可以将上述残渣用 _____ 浸泡、过滤、洗涤和烘干。

(3)实验室常用锌粒和19.6%稀硫酸制取氢气,其反应的化学方程式为 _____ ,用98%的浓硫
酸配制这种稀硫酸200g,需量取的水的体积为 _____ mL,混匀时的操作方法是 _____ (选填
序号“a.将浓硫酸沿器壁慢慢注入水中”“b.将水沿器壁注入浓硫酸中”),并用玻璃棒搅拌。

(4)氨气是一种有强烈刺激性气味的污染性气体,极易溶解于水形成氨水。

为防止氨气泄漏造成空气污染,制取氨气时需用E装置进行尾气吸收处理,其中的蒸馏水用 _____ (填“稀硫
酸”“氢氧化钠溶液”)代替时效果更好。

(★★★★) 18 . 同学们对一包干燥的红色粉末氧化铁的含量进行测定。

请你参与并回答有关问题。

称取该粉末5.0g装入硬质玻璃管中,按下图在通风橱中进行实验。

开始时缓缓通入CO气体,过一段时间后再加热使其充分反应。

待反应完全后,停止加热,继续通CO气体至玻璃管
冷却。

反应前后称量相关装置和物质的总质量,其数据如下表(假定粉末中的杂质不参加反应,也不发生变化):
反应前反应后
①组玻璃管和红色粉末的总质量为
37.5g
玻璃管和固体物质的总质量为
36.3g
②组洗气瓶和所盛溶液的总质量为
180.0g 洗气瓶和瓶中物质的总质量为180.1g
(交流讨论)(1)开始实验时,在A装置中应_____ (选序号“a.先通CO,排尽空气”“b.先加热红色粉末”)。

(2)选择①组的实验数据计算来确定红色粉末中氧化铁的质量分数是 _____ %,造成②组洗气瓶和瓶中物质的总质量增加量过小的原因是(写一点)_____ 。

(3)实验中观察到A装置反应管中的现象为_____ 。

(4)为了防止溶液倒吸,本实验停止加热前 _____ (填“需要”或“不需要”)先断开A和B的连接处。

本实验中,为达到测定氧化铁含量的目的,可以用_____ 代替CO气体。

(反思评价)从环保角度看,该实验装置设计上不足之处是 _____ 。

四、计算题
(★★★★)19 . 取碳酸钠和氯化钠的固体混合物13.6g,与质量为73g的稀盐酸恰好完全反应,产生二氧化碳气体的质量为4.4g。

计算:
(1)固体混合物中碳酸钠的质量_____。

(2)该稀盐酸中溶质的质量分数_____。

(3)反应所得的溶液中溶质的质量分数_____(要计算过程,最后结果保留一位小数)。

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