黑龙江省哈尔滨市萧红中学2020-2021学年八学年(上)学期初基础知识检测英语试题
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萧红中学八学年(上)·学期初基础知识检测·英语考试时长: 60分钟试卷满分: 100 分◆提示:请将答案作答在题卡上,否则无效。
一、单项选择(本题共40分,每小题1分)选择最佳答案。
( ) 1. Which pair of the words with the underlined letters has the same sound?A. teachchessB. great dreamC. tootheither( ) 2. Which of the following words has the same sound as the underlined letters of theword "save"?A. faceB. badC. wash( ) 3. Which pair of the words with the underlined letters has a different sound?A. crime quiteB. moon foodC. brush minute() 4. Which of the following words has a different sound from the underlined letters of theword "bowl"?A. showerB. showC. follow( ) 5.Which of the following words doesn't have the same stress as the others?A. Idea.B. Ivory.C. India.() 6.Which of the following words doesn't have the same stress as the others?A. Surprise.B. Person.C. Tonight.( ) 7. --- Sam. what do you usually do on weekends?---Sometimes I play_____ soccer and sometimes I play_____ piano.A. the, theB. the, /C./, the( ) 8. --- What will the weather_______ tomorrow, Amy?--- Well, there will _____so you need an umbrella.A. like, rainB. be like, be rainC. be like, have rain( ) 9. --Do you know the old woman_______funny glasses?--Yes, I do.A. byB. withC. of( ) 10.I_____some of my free time__________basketball for my school team.A spend, playB. take, playingC. spend, playing() 11.____ the windows before________the classroom.A. To close, leavingB. Closing, you leaveC. Close, leaving( ) 12. --- What does your maths teacher_______?---He is of medium height.A. look forB. look afterC. look like( ) 13. The book store is far away from here. You'd better_________.A. by busB.onabusC. take a bus() 14.--What's wrong with you, Bob? You look tired.---I_______ late to study for the exam last night.A. picked upB. stayed upC. woke up( ) 15.---________is it from your home to your school, Anna?--- It's quite near here, only five minutes' walk.A. How farB. How longC. How often( ) 16-.--______I take photos here?--- No, you mustn't. Don't you see the sign“NO PHOTOS"?A. MayB. MustC. Should( ) 17. --- I's really dangerous to swim in the pool. Look at the sign.--- Oh, I____ see it. Thanks for telling me.A. didn'tB. don'tC. won't( ) 18. ---What do you want to be when you grow up, a doctor or an engineer?---________, I want to be a scientist.A. NeitherB. EitherC. Both( ) 19. --- How do you like your English teacher?--- She is strict ____ us, but we all like her because she is friendly after class. A. inB. atC. with( ) 20. --- My English is very poor. How can I learn English better?---First, you should listen to the teacher carefully in class. Second, you'd better Practice______English every day.A. speakingB. to speakC. speak( ) 21. ---Do- you know that there are many different____ animals in the zoo?--- Yes, I do. And I also know that some of them are_____scary.A. kind of; kinds ofB. kinds of, kind ofC. kinds of; kinds of( ) 22. --- Listen! Someone___ in the classroom.______beautiful voice! It must be Lucy.A. is singing; What aB. sings, WhatC. is singing; How( ) 23. Tom with his family often______me________English.A. help; withB. helps studyingC. helps, with( ) 24.-- Can you tell me_____ it takes to reach your school from your home?-- Yes, about fifteen minutes.A. how muchB. how longC. how far( ) 25---What's your favorite subject?---Music. It's_______and light music is very________to me.A. relaxed; interestingB. relaxing; interestedC. relaxing; interesting( ) 26. --Would you like to_______ us in the English speech match?--- Of course. I_______an English dub and I believe I can get a good result in the match.A. join; join inB. join; joinC. take part in; join( ) 27. --- What time do you usually get up?--- At about half______sixA. toB. atC. past() 28. ---What do you think of your English teacher?--- She is______the children.A. good withB. good atC. good for( ) 29.--______ ?---At six o'clock.A. What's the time now?B. Do you have breakfast at six o'clock?C. What time do you have breakfast?()30.--How__________ your weekend?--- It was great! I had_______fun in Susan's party.A. was; much tooB. is; too manyC. was, too much()31.Icanlearn______from this TV program.A. quite a lotB. quite a fewC. quitea lot of( ) 32. Harbin is becoming a very famous city. The number of visitors is becomingA. larger and largerB. much and muchC. more and morelarge( ) 33. Before we make dumplings, we must____ the meat and put some vegetables init.A.cutupB. cut downC. cut off( ) 34. There is_______milk in the fridge. Let's go to the supermarket and buy some.A.alittleB. littleC. a few()35.--___?--- Not much.A. What are you doing?B. How's everything going?C. How do you go to school?( ) 36. Jack stands_____ his birthday cake and___. He hopes to make his dreams cometrue.A. in the front of; makes a friendB. in front of; makes a wishC. in the front of; makes a decision() 37. Tom, you study hard at your lessons and help other students with their study.____I think you do a good job these days.A. All in allB. In the wordC. At first( ) 38. In China, people usually eat______for their birthday because they are symbolsof long life and good luck.A. birthday cakesB. long noodles and eggsC. candies( ) 39. Good study habits are very useful. You'd better_________when you prepare for a testto get good results.①get all of the proper materials including books, pencils and paper ready②not have a rest every hour to make you feel less tired③come up with study questions and try not to answer them④try marking some of the topics mentioned in the book.⑤underline the words that you do not understandA.①③⑤B.①④⑤C.②④⑤( ) 40. Here is a survey (调查) about how 1,000 students from No.2 Middle School go toschool on weekdays. One third of the students going to school by bike are girls. Then二、完形填空(本题共10分,每小题1分)Do you have your own WeChat? Do you often_ 41_ others' WeChat on the mobilephone?All over the world, not only famous person but also many studentsuse WeChat asdiariesand places to share their experiences and_42_advice."I write my activities every day, like funny things or worries in my life." says Lucy, a__ 43_high schoolstudent at Cambridge High School. "I like posting pictures on my WeChat becauseit can make my WeChat more__ 44_ and more people will like it. It's a good wayto__ 45_my life to others." She has had her WeChat for more than three years.Students like writing WeChat__ 46_ they can write anything they want to, but don'tneed to_47_anymoney.Once you start to have your WeChat, you will_48_ that you open up a new world.Butwhat you write down may trouble you _49_Therefore, use the WeChat carefully_50_ you can keep yourself away from some trouble. The WeChat makes our life colorful.根据短文内容选择最佳答案:( ) 41. A. writeB. readC. look()42.A.blowoutB. look forC. ask for()43.A.16yearsoldB.16-years oldC.16-year- old( ) 44. A. interestedB. smartC. popular()45.A.bring.B. showC. send( ) 46. A. becauseB. but C. though()47.A.takeB. saveC. spend( ) 48. A. thinkB. findC. wish( ) 49. A. sometimesB. neverC. always()50.A.sothatB. even thoughC. in order三、阅读理解(本题共20分,每小题1分)( A)Do you like traveling? If so, come to our travel service.根据语言材料内容选择最佳答案。
2020-2021学年黑龙江省哈尔滨市八年级上期中数学试卷一.选择题(共10小题,满分30分,每小题3分)1.下列图形中,对称轴最少的图形是()A.B.C.D.2.下列计算正确的是()A.(a3)4=a12B.a3•a2=a6C.3a•4a=12a D.a6÷a2=a3 3.在平面直角坐标系中,点A关于x轴的对称点为A1(3,﹣2),则点A的坐标为()A.(﹣3,﹣2)B.(3,2)C.(3,﹣2)D.(﹣3、2)4.若x2+mx+9=(x+3)2,则m的值是()A.﹣18B.18C.﹣6D.65.等腰三角形的周长为14cm,其中一边长为4cm,则该等腰三角形的腰长为()A.4cm B.5cm C.4cm或5cm D.4cm或6cm 6.若x2+mx+49是一个完全平方式,那么m的值为()A.7B.14C.﹣14D.±147.如图,△ABC中,AB=AC,D是BC中点,下列结论中不正确的是()A.∠B=∠C B.AD⊥BC C.AD平分∠BAC D.AB=2BD8.如图,△ABC中,AB=AC,腰AB的垂直平分线DE交AB于点E,交AC于点D,且∠DBC=15°,则∠A的度数是()A.50°B.36°C.40°D.45°9.从边长为a的正方形内去掉一个边长为b的小正方形(如图1),然后将剩余部分剪拼成一个矩形(如图2),上述操作所能验证的等式是()A.(a﹣b)2=a2﹣2ab+b2B.a2﹣b2=(a+b)(a﹣b)C.(a+b)2=a2+2ab+b2D.a2+ab=a(a+b)10.如图,在4×4方格中,以AB为一边,第三个顶点也在格点上的等腰三角形可以作出()A.7个B.6个C.4个D.3个二.填空题(共10小题,满分30分,每小题3分)11.已知单项式3x2y3与﹣5x2y2的积为mx4y n,那么m﹣n=.12.计算:(−12a2b)3=.13.已知a m=2,a n=5,则a m+n=.14.若(x+2)(2x﹣n)=2x2+mx﹣2,则m+n=.15.如图,在第1个△A1BC中,∠B=30°,A1B=CB;在边A1B上任取一点D,延长CA1到A2,使A1A2=A1D,得到第2个△A1A2D;在边A2D上任取一点E,延长A1A2到A3,使A2A3=A2E,得到第3个△A2A3E,…按此做法继续下去,则第n个三角形中以A n为顶点的底角度数是.。
萧红中学2021届八年级8月份教学质量监测数学学科时间:120分钟总分:120分命题人:张利民★同学们,请将所有试题答案完整书写在“答题页”上,否则无效。
★一、选择题 (每小题3分,共30分)1.下列式子的结果是负数的是().(A)-|-3| (B)-(-3)(C)(-3)2(D)02.下列运算中,正确的是( ).(A)632)(aa=(B)422aaa=+(C)222)(baba-=-(D)2222a a a⋅= 3.下列四个“QQ表情”图片中,是轴对称图形的是().4.下列各数据中,能作为直角三角形三边长的是().(A)8,7,4===cba(B)5,4,3===cba(C)25,23,5===cba(D)3,1,1===cba5.在平面直角坐标系中,一次函数y=2x—5的图象不经过().(A)第一象限(B)第二象限(C)第三象限(D)第四象限6.点A(﹣5,y1)和B(﹣2,y2)都在直线y=﹣3x上,则y1与y2的关系是().(A)y1≤y2(B)y1=y2(C)y1<y2(D)y1>y27. 若x=-1是关于x的一元二次方程x2+3x+m+1=0的一个解.则另一个解是(). (A)0 (B)2 (C)-3 (D)-28.如图,在□ABCD中,∠A的平分线AE交CD于点E,若AB=5,BC=3,则EC的长().(A)1 (B)1.5 (C)2 (D)3DBA(第8题图)9.如图,点F 是ABCD 的边CD 上一点,直线BF 交AD 的延长线与点E ,则下列结论错误的是( ).(A)EA ED =AB DF (B) BC DE =FB EF (C) DE BC =BE BF (D) BE BF =AE BC10.小娜驾车从哈尔滨到大庆.设她出发第xmin 时的速度为ykm/h,图中的折线表示她在整个驾车过程中y 与x 之间的函数关系式. 下列说法: (1)在77≤x ≤88时,小娜在休息; (2) 小娜驾车的最高速度是120km/h ; (3)小娜出发第16.5min 时的速度为48km/h ; (4)如果汽车每行驶100km 耗油10升,那么 小娜驾车在33≤x ≤66时耗油6.6升. 其中正确的个数是( ).(A )1个 (B )2个 (C )3个 (D )4个二、填空题 (每小题3分,共30分)11.在“百度”搜索引擎中输入“萧红”,能搜索到与之相关的结果个数约为202000,这个数用科学记数法表示为 .12.函数y=xx 281-+的自变量的取值范围是 . 13.计算8812-的结果是 . 14. 把多项式a 3-4a 2b+4ab 2分解因式的结果是 .15.不等式组210353x x x x >-⎧⎨+⎩≥的解集为 . 16.方程21x x =+的解是 . 17.将函数35-=x y 的图象平移,使它经过点(0,6),则平移后直线的函数关系式为__________.y x –2424487296120144–22–11112233445566778899110O (第10题图) (第9题图)18. 如图所示,四边形ABCD 中,∠B =90°,AB =2,CD =8,AC ⊥CD ,若,31sin =∠ACB 则cos ∠ADC =______.19.如图,在正方形ABCD 中,AB=2,点E 为边BC 中点,P 为正方形边上一点,且PB=AE ,则PE的长为____________.20.如图,在Rt △ABC 中,∠ACB=90°,以AC ,AB 为边作等边三△ADC 和等边△ABE,DE 与AB 交于点F,当BC//AE,BC=6时,求则线段BF 的长为__________.三、解答题(21~22题各题7分,23~24题各题8分,25~27题各l0分,共计60分)21.(本题7分)先化简,再求代数式(44422+--x x x -22+-x x )÷2-x x 的值,其中x=4cos30°一2tan45°.22.(本题7分)如图,图1和图2都是7×4正方形网格,每个小正方形的边长是1,请按要求画出下列图形,所画图形的各个顶点均在所给小正方形的顶点上.(1)在图1中画出一个等腰直角△ABC ,并直接写出△ABC 的周长;(2)在图2中画出一个钝角△ABD ,使△ABD 的面积是3.(第20题图) (第18题图) (第22题图)E D (第19题图)萧红中学开展以“我最喜爱的职业”为主题的调查活动,围绕“在演员、教师、医生、律师、公务员共五类职业中,你最喜爱哪一类?(必选且只选一类)”的问题,在全校范围内随机抽取部分学生进行问卷调查,将调查结果整理后绘制成如图所示的不完整的统计图,请你根据图中提供的信息回答下列问题:(1)本次调查共抽取了多少名学生?(2)求在被调查的学生中,最喜爱教师职业的人数,并补全条形统计图;(3)若萧红中学共有2100名学生,请你估计该中学最喜爱律师职业的学生有多少名?24.(本题8分)已知:如图,在正方形ABCD中,点E在边CD上,AQ⊥BE于点Q,DP⊥AQ于点P.(1)求证:AP=BQ;(2)在不添加任何辅助线的情况下,请直接写出图中四对线段,使每对中较长线段与较短线段长度的差等于PQ的长.(第23题图)(第24题图)植树节期间,某单位欲购进A、B两种树苗,若购进A种树苗3棵,B种树苗5棵,需2100元,若购进A种树苗4棵,B种树苗10棵,需3800元.(1)求购进A、B两种树苗的单价;(2)若该单位准备用不多于8000元的钱购进这两种树苗共30棵,求A种树苗至少要购进多少棵?26.(本题10分)如图1,在□ABCD中,AC、BD相交于O,过O作OG⊥AC交BC于G,连接AG.(1)求证:AC平分∠DAG;(2)如图2,把△AOB沿OA翻折得到△AOE,连接DE,求证:ED∥AC;(3)如图3,连接CE交AD于F点,交BD于H点,若∠ABC=60°,AB=4,BC=6,求EH的长.(第26题图1) (第26题图2)(第26题图3)27.(本题10分)如图1,在平面直角坐标系中,点O 为坐标原点,直线343+=x y 交x 轴于A ,交y 轴于C ,直线BC 与x 轴交于点B,且点B 与点A 关于y 轴对称,直线BF 交y 轴于点F ,且338=∆BOF S . (1)求直线BC 的解析式; (2)E 为BF 上一点,连接AE 、CE ,设点E 的横坐标为t ,△ACE 的面积为S ,求S 与t 的关系式;(3)如图2,在(2)的条件下,点D 在OC 上,取CE 的中点M ,点D 在AM 上方,连接DM ,若∠CAD=∠BAE ,DM:BE=23,求E 点坐标.(第27题图1) (第27题图2)。
萧红中学2024—2025学年度上学期八学年上·英语 学科·阶梯作业第一部分 听力理解(本大题共20小题,每小题1分,共20分)第一节 听下面五个句子,从每小题所给的A 、B 、C 三个选项中选择最佳答语。
每个句子读两遍。
( ) 1. A. By bus. B. At a quarter past seven C. In the dining hall ( ) 2. A. Twelve. B. I’m fine. C. On foot.( ) 3. A. In Beijing. B. At seven o’clock. C. He usually takes a walk.( ) 4. A. Monday.B. May 1st.C. In March.() 5. A. With my friend. B. In the park.C. At 6 o’clock.第二节 听下面五段短对话,从每小题所给的A 、B 、C 三幅图片中选择与听到的信息相关联的一项。
每段对话读两遍。
( ) 6. A. B. C.( ) 7. A. B. C.( ) 8. A. B. C.( ) 9. A. B. C.( ) 10. A. B. C.第三节 听下面一段长对话,将A 部分内容与B 部分内容进行匹配,对话读两遍。
A () 11. Tom goes to school ________( ) 12. Alice goes to school ________( ) 13. Tom’s father goes to work ________( ) 14. Tom’s mother goes to work ________() 15. Tom’s brother goes to work ________B A. at 7:40B. at 8:00C. at 7:30D. at 10:15E. at 7:50第四节 听下面一段独白,从每小题所给的A 、B 、C 三个选项中选择最佳答案。
2024-2025学年黑龙江省哈尔滨市萧红中学八年级上学期期中测试物理试题1.关于一些物理量的估计,下列数据最接近实际的是()A.你的脉搏每跳动一次的时间约1min B.物理课本中一张纸的厚度约为1mm C.中学生使用的课桌高度大约80cm D.人正常步行1min约能走2km2.关于误差,下列说法正确的是()A.测量时为了减小误差可以多估读几位B.测量时通过多次测量求平均值的方法可以减小误差C.测量的数值和真实值可能完全相同,所以误差是可以避免的D.测量时所用的测量仪器越精密,测量结果错误越小3.下列例子中,与其它的运动形式不同的是()A.猎豹奔跑B.花香扑鼻C.车流滚滚D.飞船翱翔4.如图所示,小明在“测平均速度”的实验中,使小车从斜面A点静止下滑,经过B点到达C点,图中已标出小车经过A、B、C三点对应时刻。
下列说法中正确的是()A.段距离为B.段平均速度为C.小车从点到点做匀速直线运动D.若小车过A点后才开始计时,测出段平均速度将偏大5.下列实验和实例中,能说明声音的产生或传播条件的一组是()①把发声的音叉放进水盆里看到溅出水花;②二胡发声时用手按住琴弦,琴声就消失了;③拿一张硬纸片,让它在木梳齿上划过,一次快些,一次慢些,比较两次的不同;④在月球上的宇航员,对着对方“大声说话”,对方也不能听到声音。
A.①②③B.①②④C.②③④D.①③④6.如图所示的光现象中,与小孔成像原理相同的是()A.手影B.凸面镜C.水中倒影D.筷子“变弯”7.甲、乙两辆汽车在某段公路上行驶,它们的路程s随时间t变化的关系如图所示,下列说法正确的是()A.0~10min,甲车平均速度大于乙车平均速度B.10~20min,甲车相对于地面静止、乙车相对于地面运动C.20~30min,甲车平均速度大于乙车平均速度D.0~30min,甲、乙两车平均速度均为1km/min8.如图是几个关于声现象的实验,下列说法正确的是()A.图甲:悬挂在细线下的乒乓球靠近发声的音叉时被弹开,说明发声体在振动B.图乙:用大小不同的力弹动紧压在桌边的刻度尺,观测者听见声音的音调不同C.图丙:玻璃罩中的空气被逐渐抽出,观测者听到闹钟发出的声音响度不变D.图丁:放在正在播放音乐的扩音器前的蜡烛烛焰摆动,说明声能传递信息9.传说中有一种鸟叫衔枝鸟,它能靠一小截树枝成功地飞越太平洋。
黑龙江省哈尔滨市萧红中学2024-2025学年八年级上学期开学测试数学试题一、单选题1.下列方程中,是二元一次方程的是( ). A .1xy = B .31y x =- C .12x y+= D .1x y z ++=2.如果0c ≠,则下列各式中一定正确的是( ) A .23c c +<+B .23c c -<-C .2c c >D .21c c> 3.下列选项中,给出的三条线段不能组成三角形的是( )A .2.535,, B .7,6,12C .3a -,a ,()33a >D .a ,4a +,()62a a +>4.下列条件中,能判定△ABC ≌△DEF 的是( ) A .AB DE BC ED A D ==∠=∠,, B .A D C F AC EF ∠=∠∠=∠=,, C .B E A D AC EF ∠=∠∠=∠=,,D .BE A D AB DE ∠=∠∠=∠=,,5.以39y x y x =-+⎧⎨=-⎩的解为坐标的点(),x y 在平面直角坐标系中的位置是( )A .第一象限B .第二象限C .第三象限D .第四象限6.组成不等式组的两个不等式的解集在数轴上表示如图所示,这个不等式组的解集是( ).A .3x ≤B .1x >-C .13x -<<D .13x -<≤7.舟山少体校要从甲、乙、丙、丁四位运动员中选拔一位成绩较为稳定的选手参加省射击比赛.测得的四位选手10次射击平均成绩和方差数据如右表所示,判断哪位学生参加比赛较为合适( )A .甲B .乙C .丙D .丁8.一个笼子装有鸡和兔,共有10个头,34只脚,每只鸡有两只脚,每只兔有四只脚.设鸡有x 只,兔有y 只,则可列二元一次方程组( )A .10,4234x y x y +=⎧⎨+=⎩B .10,2234x y x y +=⎧⎨+=⎩C .10,4434x y x y +=⎧⎨+=⎩D .10,2434x y x y +=⎧⎨+=⎩9.如图,ABC ADE △≌△,若80B ∠=︒,30E ∠=︒,:5:2DAB DAC ∠∠=,AC 与DE 交于点F ,则EFC ∠的度数为( )度A .75B .80C .60D .7010.对于一组数据 3,3,2,3,6,3,10,3,6,3,2,下列结论正确的有( ). ①这组数据的众数是3;②这组数据的众数与中位数的数值相等; ③这组数据的中位数与平均数的数值相等; ④这组数据的平均数与众数的数值相等.A .1个B .2个C .3个D .4个二、填空题11.已知方程34y x +=,用含y 的代数式表示x ,则x =. 12.x 的3倍减去2的差不大于0,列出不等式是.13.空调安装在墙上时,一般都会采用如图所示的方法固定,这种方法应用的几何原理是.14.正多边形的一个的内角是108︒,则这个多边形的边数是.15.如图,在△ABC 中,∠BAC =40°,∠B =75°,AD 是△ABC 的角平分线,则∠ADB 的度数为度.16.若方程3mx y -=的一个解是21x y =-⎧⎨=⎩,则m =.17.某试卷共有50道选择愿,每道题选对得4分,选错了或者不选扣2分,至少要选对道题,其得分才能不少于120分.18.对于实数a b ,,定义运算“※”:())ab a b a a b <⎧=≥※,例如23-※,因为23-<,所以23236-=-⨯=-※.若,x y 满足方程组48229x y x y -=-⎧⎨+=⎩,则x y =※.19.AD 为△ABC 的中线,AE 为△ABC 的高,△ABD 的面积为10,AE =5,CE =1,则DE 的长为.20.如图,在平面直角坐标系中,C (4,4),点B ,A 分别在x 轴正半轴和y 轴正半轴上,∠ACB =90°,则OA +OB =.三、解答题 21.解方程组(1)32146x y x y +=⎧⎨-=-⎩ (2)()325223228x y x x y x +=+⎧⎨+=+⎩22.解不等式(组)(1)11332x x -+>- (2)()324134x x x x ⎧+<+⎪⎨+≤⎪⎩23.已知DEF V 中,DE DF =,90EDF ∠=︒,点A 、B 在DEF V 外,AE AB ⊥,FB AB ⊥.(1)如图1,求证:ADE BFD V V ≌;(2)如图2,若1AE =,3AB =,沿DE 翻折ADE V 得到CDE V ,CD 交EF 于点G ,作F H C D ⊥于点H ,请直接写出除AE 外长度为1的所有线段.24.某校为了解学生的身高情况,对本校学生进行了抽样调查.已知抽取的样本中男生和女生的人数相同,利用所得数据绘制成如下所示的统计图表: 身高情况分组表(单位:cm )男生身高情况频数分布直方图 女生身高情况扇形统计图根据图表提供的信息,回答下列问题:(1)在样本中,男生身高的众数在______组,中位数在______组; (2)在样本中,女生身高在E 组的人数为______;(3)已知该校共有男生400人、女生500人,请估计该校身高在160cm 170cm x ≤<之间的学生共有多少人.25.在高速铁路建设中,某渣土运输公司承包了某标段的土方运输任务,拟派出大、小两种型号的渣土运输车运输土方.已知2辆大型渣土运输车与3辆小型渣土运输车一次共运输土方31吨,5辆大型渣土运输车与6辆小型渣土运输车一次共运输土方70吨. (1)一辆大型渣土运输车和一辆小型渣土运输车一次各运输土方多少吨;(2)该渣土运输公司决定派出大、小两种型号渣土运输车共20辆参与运输土方,若每次运输土方总量不小于148吨,大型渣土运输车至少派出多少辆. 26.课外兴趣小组活动时,老师提出了如下问题:如图,ABC V 中,若8AB =,6AC =,求BC 边上的中线AD 的取值范围.小明在组内经过合作交流,得到了如下的解决方法:延长AD 到点E ,使D E A D =,请根据小明的方法思考:(1)由已知和作图能得到ADC EDB V V ≌的理由是______. A .SSS B .SAS C .AAS D . HL (2)求得AD 的取值范围是______.A .68AD <<B .68AD ≤≤C .17AD << D .17AD ≤≤【感悟】解题时,条件中若出现“中点”“中线”字样,可以考虑延长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中. 【方法应用】(3)如图,在四边形ABCD 中,AB CD ∥,点E 是BC 的中点,若AE 是BAD ∠的平分线,试猜想线段AB AD DC 、、之间的数量关系,并证明你的猜想;【拓展延伸】(4)如图,已知AB CF ∥,点E 是BC 的中点,点D 在线段AE 上,EDF BAE ∠=∠,若5AB =,2CF =,求出线段DF 的长.+27.在平面直角坐标系中,点A 坐标(),0m ,点B 坐标 0,m ,连接AB ,若m 为正整数,且m 满足不等式组70101x x ->⎧⎨->⎩.(1)如图1,求ABO V 的面积;(2)如图2,点C 在x 轴负半轴,OC OA <,连接BC ,过点A 作BC 的垂线交y 轴于点D ,垂足为E ,设点C 的横坐标为t ,ABD △的面积为S ,请用含t 的式子表示S ;(3)如图3,在(2)的条件下,点P 在线段AD 上,连接BP ,BP AD =.当2BPE CBO ∠=∠时,求t 值.。
黑龙江省哈尔滨市萧红中学2023-2024学年八年级上学期月考物理试卷(10月份)(解析版)一、单项选择题(每小题2分,共20分。
每小题有一个选项是正确的)1.(2分)以下测量工具与所测物理量对应不正确的是( )A.电子停表——测速度B.卷尺——测长度C.温度计——测温度D.量杯——测体积2.(2分)“估测”是物理学中常用的一种方法。
同学尝试估测了身边的一些物理量,其中不合理的是( )A.中学生身高165cmB.中学生脉搏跳动约为70次/sC.中学生步行的速度1.2m/sD.课桌的高度80cm3.(2分)通过下列哪个现象,我们可以知道分子在不断地运动( )A.树叶飘落B.雪花飞舞C.大雾漫天D.花香袭人4.(2分)2020年春节期间爆发的新型冠状病毒疫情引起了全球广泛关注。
如图所示,冠状病毒颗粒的平均直径为100nm,呈球形或椭圆形。
下列关于该病毒直径的单位换算正确的是( )A.100nm=100nm×10﹣3μm=0.1μmB.100nm=100×10﹣9m=10﹣7mC.100nm=100×10﹣6=10﹣4mmD.100nm=100nm×10﹣12=10﹣10km5.(2分)下列有关测量的说法中正确的是( )A.测量时只要认真遵守操作规程,误差是可以避免的B.读数时,估读位数越多就越准确C.测量过程中误差是不能避免的,只能尽量减小D.多次测量取平均值能够消灭测量的误差6.(2分)小泽用同一刻度尺测量同一课桌的宽度4次,结果分别为48.13cm、48.31cm、48.10cm、48.11cm,下列说法正确的是( )A.该测量结果中没有错误数据B.最后结果应记作48.11cmC.48.10cm中最后一位“0”可以去掉D.此刻度尺的分度值是1cm7.(2分)如图所示,在小车上放一个玩具小人,用手缓慢拉动小车,下列说法正确的( )A.小人相对于桌面是静止的B.小人相对于地面是静止的C.小车相对于桌面是静止的D.车上的玩具小人相对于车是静止的8.(2分)关于声现象,下列说法正确的是( )A.声音只可以在空气中传播B.声波可以传递能量C.声音在真空中传播的速度最快D.只要物体振动,我们就一定能听到声音9.(2分)小泽用一把刻度尺测量物体的长度时,他的测量方法如图所示,下列选项是同学指出小泽测量中的四个错误之处( )A.尺应该沿着被测物体B.刻度尺没有紧贴被测长度C.零刻线或某刻度线没有对齐被测长度的一端D.视线没有和尺面平行10.(2分)如图是同学在参加萧红中学百米赛跑的运动过程,下列描述中错误的一项是( )A.图中同学跑完全程的平均速度是8m/sB.裁判员听到发令枪的声音才开始计时,得到的结果属于测量误差C.以地面为参照物,该同学是运动的D.图中运动员在相等的时间内通过的路程不相等,做变速直线运动二、双项选择题(每小题2分,共4分。
萧红中学2024—2025学年度上学期八学年上·英语学科·期中测试第一部分听力部分(共20小题;每小题1分,满分20分)Ⅰ. 听句子,选择你听到的单词或短语。
听一遍。
(5分)1. A. news B. sitcoms C. game shows2. A. watch B. stand C. expect3. A. bookshop B. party C. concert4. A. grandmother B. grandfather C. Lee Tong5. A. football B. basketball C. table tennisⅡ. 听对话,选择最佳答语。
听两遍。
(5分)6. Is Jack's favourite subject history?A. Yes, it is.B. No, he likes chemistry best.C. He likes maths very much.7. Is it eight o'clock now?A. No, it's 7: 20.B. No, it's 7: 30.C. Yes, it is.8. Why do they buy a book as Lucy's birthday present?A. Because she likes writing.B. Because she likes Harry Potter.C. Because she likes reading.9. What doesn't Mary often have for dinner?A. Beef.B. Chicken.C. Potatoes.10. Does the girl like doing homework on Sundays?A. No, she likes doing housework.B. No, she likes playing.C. No, she likes watching TV. Ⅲ. 听对话,选择最佳答案。
萧红中学2021届化学学科基础测试试题可能用到的相对原子质量:H-1 C112 0-16 S-32 Cl-35.5 Na-23 Ca-40 Fe-56 CI-35.5一、选择题(1题-20题,每题2分,共40分,每小题只有一个正确选项)1.化学使世界变得更加绚丽多彩,人类的衣、食、住、行都离不开化学。
下列有关叙述不属化学对人类的贡献的是()2.下列物质的用途错误的是()+)含有电子的数目是()3.—个铵根离子(NH4A.1个B.10个C.12个D.17个4.下列有关科学家对化学方面的贡献中说法错误的是()A.门捷列夫发现了元素周期律,并编制出元素周期表B.拉瓦锡得出了空气是甶氧气、氮气及稀有气体组成的结论C.我国科学家张青莲教授为相对原子质量的测定做出了卓越贡献D.意大利科学家阿伏加德罗创立了分子学说5.下列过程中发生化学变化的是()6.下列叙述正确的是()A.同一种物质在固态、液态和气态时所占体积不同B.同种元素组成的物质一定是纯净物C.最外层电子数少于4个的原子,一定是金属元素的原子D.元素的原子的电子层数一定等于其元素所在周期数7.下列四个图像能正确反映对应变化关系的是()8.针对下列事实解释错误的是()选项事实解释A 哈尔滨的春天到处可闻到丁香花香分子是不断地运动的B 用扫描隧道显微镜能拍摄到苯分子分子很小,而且是真实存在的C 水通电分解生成氢气和氧气分子可分,原子不可分D 湿衣服在夏天比冬天干的快温度升高,分子能量增大,运动速率加快A.图中粒子共能表示四种元素B.图中d粒子在化学反应中易失去电子C.图中b粒子的化学符号为Mg2+D.图中表示阴离子的是c、e10.下图所示物质的用途主要利用其化学性质,但不发生化学变化的是()11.下列关于能源与资源的说法错误的是()A.海洋中含有80多种元素B.可利用淡水资源只约占全球水储量的2.53%C.空气是重要的自然资源,其中氮气的体积分数约为78%D.地壳中含量最多的金属元素是铝12.下列实验基本操作不规范的是()13.下列应用和相应的原理(用化学方程式表示)及基本反应类型都正确的是()A.加热氢氧化铜制氧化铜: Cu(OH)2CuO + H20 分解反应B.用天然气作燃料: 2C0 + 02C02化合反应C.用氢氧化钠溶液吸收二氧化硫气体: 2NaOH + S02 =Na2S03+ H2O 复分解反应D.用铁桶配制农药波尔多液: Fe + CuS04 = FeS04+ Cu 置换反应14.下列操作错误的是()A.试管夹夹持试管时要从试管的底部套上,取下B.过滤时漏斗末端管尖要紧靠烧杯内壁C.烧得很热的玻璃仪器,不要立即放在实验台上D.给试管内的物质加热时,一定要将试管口略向下倾斜15.工业酒精中因含有有毒的甲醇而不能饮用,甲醇分子结构如下图所示,关于甲醇的下列叙述错误的是()A.甲醇由碳、氢、氧三种元素组成B.甲醇分子是由碳、氢、氧原子组成C.甲醇中所含的质子数和电子数一定相等D.1个甲醇分子中含有6个原子核选项需区分的物质方法1 方法2A 过氧化氢溶液和水取样,分别加入二氧化锰, 观察现象取样,分别加入硫酸铜溶液,观察现象B 铁粉和木炭粉取样,分别用磁铁吸引,观察现象取样,分别加稀硫酸,观察现象C 酒精和醋酸闻气味取样,分别滴无色酚酞溶液,观察现象D 硬水和蒸馏水分别取样,蒸干观察分别取样,加入等质量的肥皂水搅拌,观察现象A.t1℃时,甲、乙的溶解度相等B.t2℃时,甲的溶解度为50C.甲中混有少量的乙时,可用降温结晶的方法提纯甲D.t1℃时,甲、乙两种饱和溶液恒温蒸发等质量的水,析出晶体质量相等18.下列各组物质中,按单质、化合物、混合物顺序排列的是()A.天然气、乙醇、液化石油气B.氦气、浓硫酸、胆矾C.金属汞、熟石灰、液态空气D.金刚石、石灰石、赤铁矿选项物质杂质试剂操作方法A CaO CaCO3稀盐酸加入适量的稀盐酸,蒸发B MnO2KCl03无把混合物放在试管中加热,使之充分反应C Fe CuSO4蒸馏水加入足量的蒸馏水充分溶解后,过滤,将滤渣晾干D Cu Cu0 稀盐酸向混合物中加足量的稀盐酸,充分反应后,过滤,将滤渣洗涤干燥氢元素的质量分数为0.4%,碳元素的质量分数为2.4%。
萧红中学八学年(上)·学期初基础知识检测·英语考试时长: 60分钟试卷满分: 100 分◆提示:请将答案作答在题卡上,否则无效。
一、单项选择(本题共40分,每小题1分)选择最佳答案。
( ) 1. Which pair of the words with the underlined letters has the same sound?A. teachchessB. great dreamC. tootheither( ) 2. Which of the following words has the same sound as the underlined letters of theword "save"?A. faceB. badC. wash( ) 3. Which pair of the words with the underlined letters has a different sound?A. crime quiteB. moon foodC. brush minute() 4. Which of the following words has a different sound from the underlined letters of theword "bowl"?A. showerB. showC. follow( ) 5.Which of the following words doesn't have the same stress as the others?A. Idea.B. Ivory.C. India.() 6.Which of the following words doesn't have the same stress as the others?A. Surprise.B. Person.C. Tonight.( ) 7. --- Sam. what do you usually do on weekends?---Sometimes I play_____ soccer and sometimes I play_____ piano.A. the, theB. the, /C./, the( ) 8. --- What will the weather_______ tomorrow, Amy?--- Well, there will _____so you need an umbrella.A. like, rainB. be like, be rainC. be like, have rain( ) 9. --Do you know the old woman_______funny glasses?--Yes, I do.A. byB. withC. of( ) 10.I_____some of my free time__________basketball for my school team.A spend, playB. take, playingC. spend, playing() 11.____ the windows before________the classroom.A. To close, leavingB. Closing, you leaveC. Close, leaving( ) 12. --- What does your maths teacher_______?---He is of medium height.A. look forB. look afterC. look like( ) 13. The book store is far away from here. You'd better_________.A. by busB.onabusC. take a bus() 14.--What's wrong with you, Bob? You look tired.---I_______ late to study for the exam last night.A. picked upB. stayed upC. woke up( ) 15.---________is it from your home to your school, Anna?--- It's quite near here, only five minutes' walk.A. How farB. How longC. How often( ) 16-.--______I take photos here?--- No, you mustn't. Don't you see the sign“NO PHOTOS"?A. MayB. MustC. Should( ) 17. --- I's really dangerous to swim in the pool. Look at the sign.--- Oh, I____ see it. Thanks for telling me.A. didn'tB. don'tC. won't( ) 18. ---What do you want to be when you grow up, a doctor or an engineer?---________, I want to be a scientist.A. NeitherB. EitherC. Both( ) 19. --- How do you like your English teacher?--- She is strict ____ us, but we all like her because she is friendly after class. A. inB. atC. with( ) 20. --- My English is very poor. How can I learn English better?---First, you should listen to the teacher carefully in class. Second, you'd better Practice______English every day.A. speakingB. to speakC. speak( ) 21. ---Do- you know that there are many different____ animals in the zoo?--- Yes, I do. And I also know that some of them are_____scary.A. kind of; kinds ofB. kinds of, kind ofC. kinds of; kinds of( ) 22. --- Listen! Someone___ in the classroom.______beautiful voice! It must be Lucy.A. is singing; What aB. sings, WhatC. is singing; How( ) 23. Tom with his family often______me________English.A. help; withB. helps studyingC. helps, with( ) 24.-- Can you tell me_____ it takes to reach your school from your home?-- Yes, about fifteen minutes.A. how muchB. how longC. how far( ) 25---What's your favorite subject?---Music. It's_______and light music is very________to me.A. relaxed; interestingB. relaxing; interestedC. relaxing; interesting( ) 26. --Would you like to_______ us in the English speech match?--- Of course. I_______an English dub and I believe I can get a good result in the match.A. join; join inB. join; joinC. take part in; join( ) 27. --- What time do you usually get up?--- At about half______sixA. toB. atC. past() 28. ---What do you think of your English teacher?--- She is______the children.A. good withB. good atC. good for( ) 29.--______ ?---At six o'clock.A. What's the time now?B. Do you have breakfast at six o'clock?C. What time do you have breakfast?()30.--How__________ your weekend?--- It was great! I had_______fun in Susan's party.A. was; much tooB. is; too manyC. was, too much()31.Icanlearn______from this TV program.A. quite a lotB. quite a fewC. quitea lot of( ) 32. Harbin is becoming a very famous city. The number of visitors is becomingA. larger and largerB. much and muchC. more and morelarge( ) 33. Before we make dumplings, we must____ the meat and put some vegetables init.A.cutupB. cut downC. cut off( ) 34. There is_______milk in the fridge. Let's go to the supermarket and buy some.A.alittleB. littleC. a few()35.--___?--- Not much.A. What are you doing?B. How's everything going?C. How do you go to school?( ) 36. Jack stands_____ his birthday cake and___. He hopes to make his dreams cometrue.A. in the front of; makes a friendB. in front of; makes a wishC. in the front of; makes a decision() 37. Tom, you study hard at your lessons and help other students with their study.____I think you do a good job these days.A. All in allB. In the wordC. At first( ) 38. In China, people usually eat______for their birthday because they are symbolsof long life and good luck.A. birthday cakesB. long noodles and eggsC. candies( ) 39. Good study habits are very useful. You'd better_________when you prepare for a testto get good results.①get all of the proper materials including books, pencils and paper ready②not have a rest every hour to make you feel less tired③come up with study questions and try not to answer them④try marking some of the topics mentioned in the book.⑤underline the words that you do not understandA.①③⑤B.①④⑤C.②④⑤( ) 40. Here is a survey (调查) about how 1,000 students from No.2 Middle School go toschool on weekdays. One third of the students going to school by bike are girls. Then二、完形填空(本题共10分,每小题1分)Do you have your own WeChat? Do you often_ 41_ others' WeChat on the mobilephone?All over the world, not only famous person but also many studentsuse WeChat asdiariesand places to share their experiences and_42_advice."I write my activities every day, like funny things or worries in my life." says Lucy, a__ 43_high schoolstudent at Cambridge High School. "I like posting pictures on my WeChat becauseit can make my WeChat more__ 44_ and more people will like it. It's a good wayto__ 45_my life to others." She has had her WeChat for more than three years.Students like writing WeChat__ 46_ they can write anything they want to, but don'tneed to_47_anymoney.Once you start to have your WeChat, you will_48_ that you open up a new world.Butwhat you write down may trouble you _49_Therefore, use the WeChat carefully_50_ you can keep yourself away from some trouble. The WeChat makes our life colorful.根据短文内容选择最佳答案:( ) 41. A. writeB. readC. look()42.A.blowoutB. look forC. ask for()43.A.16yearsoldB.16-years oldC.16-year- old( ) 44. A. interestedB. smartC. popular()45.A.bring.B. showC. send( ) 46. A. becauseB. but C. though()47.A.takeB. saveC. spend( ) 48. A. thinkB. findC. wish( ) 49. A. sometimesB. neverC. always()50.A.sothatB. even thoughC. in order三、阅读理解(本题共20分,每小题1分)( A)Do you like traveling? If so, come to our travel service.根据语言材料内容选择最佳答案。