山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级物理(第7周)(无答案)

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山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第17周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第17周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第17周)一、单选题1.下列说法正确的是()A.2的平方根是B.(﹣4)2的算术平方根是4C.近似数35万精确到个位D.无理数的整数部分是52.某水库的水位在5小时内持续上涨,初始的水位高度为6米,水位以每小时0.3米的速度匀速上升,则水库的水位高度y米与时间x小时(0≤x≤5)的函数表达式为()A.y=﹣0.3x+6 B.y=﹣0.3x﹣6 C.y=0.3x+6 D.y=0.3x﹣63.P1(x1,y1),P2(x2,y2)是一次函数图象上的两点,下列判断中,正确的是()A.y1>y2B.y1<y2C.当x1<x2时,y1<y2D.当x1<x2时,y1>y24.如图,在数轴上,点,对应的实数分别为1,3,,,以点为圆心,为半径画弧交数轴正半轴于点,则点对应的实数为()A.B.C.D.5.当1a2时,代数式+|a﹣1|的值是()A.1 B.﹣1 C.2a﹣3 D.3﹣2a6.如图1、图2都是由8个一样的小长方形拼(围)成的大矩形,且图2中的阴影部分(小矩形)的面积为.则小长方形的长为().A.5 B.3 C.7 D.97.已知是方程的一个解,则a的值为().A.2 B.C.1 D.8.如图,在中,是边上的中点,连结,把沿翻折,得到,连接,若,,则的面积为()A.B.C.D.29.已知点是点关于轴的对称点,则为()A.B.1 C.D.510.某青年排球队12名队员的年龄情况如表:年龄18 19 20 2122人数 1 4 3 2 2则这个队队员年龄的众数和中位数是().A.19,20 B.19,19 C.19,20.5 D.20,1911.今年“五一”节,小明外出爬山,他从山脚爬到山顶的过程中,中途休息了一段时间,设他从山脚出发后所用时间为t(分钟),所走路程为s(米),s与t之间的函数关系如图所示,则下列说法中,错误的是()A.小明中途休息用了20分钟B.小明在上述过程中所走路程为7200米C.小明休息前爬山的速度为每分钟60米D.小明休息前后爬山的平均速度相等12.如图,在中,,若点在内,且,则的度数为()A.110°B.115°C.120°D.125°二、填空题13.若|3﹣a|+=0,则a+b的立方根是_____.14.若a+2与4-3a是某个正数M的两个平方根,则M=______________.15.我们用[m]表示不大于m的最大整数,如:[2]=2,[4.1]=4,[3.99]=3.若,则x 的取值范围是________.16.如图,在四边形ABCD中,,AD=CD,AB+BC=8,则四边形ABCD的面积是_________.17.若b=﹣+6,则=________.。

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第六周)(无答案)

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第六周)(无答案)

2019-2020学年度山东省滕州市张汪中学周末拓展提高练习八年级物理(第6周)一、选择题1.如图所示是某种物质在熔化过程中温度随时间变化的图象,根据图象可知,该物质A.是晶体,熔点是0 ℃B.液态的比热容比固态的比热容小C.在第4 min时,没有出现液态D.在第2 min至第6 min过程中内能不变2.沈阳怪坡滑雪场配有先进的半自动造雪系统.造雪机的原理是:将水注入一个专用喷嘴或喷枪,在那里接触到高压空气形成“白雾”并喷入寒冷的外部空气中,在落到地面以前这些小水滴形成雪花.下列说法中正确的是()A.冰雪在熔化过程中,热量增大,温度保持不变B.所有气体在压缩到足够程度时都可以液化C.液体蒸发时本身温度保持不变D.造雪机喷出的“白雾”落地之前形成雪花是凝固过程3.今年春节前后,历来难见的雪花身影已在我市主城区出现多次,我国南方大部分地区也遭遇了罕见低温雨雪天气,对以下与之相关的各图,说法中不正确的是()A.图(a)中雾凇是水蒸气的凝固现象B.图(b)中路面结冰需要交通管制是因为车轮与冰面间的摩擦力太小C.图(c)中向公路冰面上撒盐是利用降低熔点的方法来化冰D.图(d)中竹子被冰雪压“弯了腰”,说明力可以使物体发生形变4.下面是某同学使用温度计测液体的温度时的实验过程,其中有误的一项是()A.观察所要使用的温度计,了解它的测量范围和分度值B.使温度计的玻璃泡跟被测液体充分接触C.将温度计从被测液体中取出拿到灯光下读数D.将温度计放入被测液体后要稍候一会再读数5.下列四种现象,其中主要通过凝华形成的是A.大雨B.冰雹C.霜冻D.雾6.下列仪表不是利用液体热胀冷缩原理制成的是()A.寒暑表B.体温计C.热电偶温度计D.实验室用温度计7.下列现象,能说明凝华放热的是()A.放在衣橱中的樟脑丸会越来越小,最后“消失”了B.下雪时比化雪时暖和C.舞台上“烟雾缭绕”的景象D.在严寒的冬天,一直冰冻的衣服也可以“冻干”8.小雨发明了一种“神奇恒温杯”,他在双层玻璃杯的夹层中封入适量的海波晶体(熔点为48℃).开水倒入杯中后,水温会迅速降到48℃左右,人即可饮用,并能较长时间保持水温不变,这主要是利用A.海波熔化和凝固都吸热B.海波熔化和凝固都放热C.海波熔化吸热、凝固放热D.海波熔化放热、凝固吸热9.把的水和的冰都放在的房间里,出现的现象是A.水开始结冰B.冰开始熔化C.水不结冰,冰也不熔化D.无法确定10.某些地区有用番薯、酒曲、水做原料酿造“地瓜酒”的习俗.首先将番薯煮熟,晾到一定的温度后,把番薯、酒曲、水按一定比例混合并搅拌均匀,经发酵40天左右,其间每天搅拌一到两次,最后在“酒料”中分离出“地瓜酒”.如图所示是从“酒料”中提取“地瓜酒”的装置示意图.关于提取“地瓜酒”的工序说法不正确的是()A.在提取“地瓜酒”的过程中发生的物态变化是汽化和液化B.烧火加热的目的是使酒料吸热升华C.小锅中冷水的作用是使酒精蒸气液化D.为了提高“出酒”速度,小锅中的冷水要不停地换11.日常生活中我们会经常看到烧开水时从壶嘴冒出“白气”,刚从冰箱中取出的雪糕周围也有“白气”,如图所示.下面对这两种“白气”的解释正确的是()A.两种白气都属液化现象B.两种白气都是原来空气中的水蒸气遇冷形成的C.壶嘴冒出的白气是壶里冒出的水蒸气遇冷凝华形成的D.雪糕周围的白气是雪糕升华形成的12.有一支刻度均匀但示数不准的温度计,其在冰水混合物中的示数为4℃,在1个标准大气压下的沸水中示数为96℃.用此温度计测某杯液体的温度是22.4℃,则这杯液体的实际温度是()A.16℃B.18℃C.20℃D.24℃13.我国在高温超导研究领域处于世界领先地位,早已获得热力学温度为100K的高温超导材料.热力学温度(T)与摄氏温度(t)的换算关系是T=t+273.15,热力学温度100K相当于()A.273.15℃B.100℃C.-173.15℃D.-100℃14.小明测量烧杯中热水的温度时,将热水倒入另一烧杯中少许,然后像如图所示的那样去测量和读数,小红从他的操作中找出了一些错误,其中一条有问题,请你把它挑出来()A.不应将水倒入另一烧杯中,这会使温度降低B.温度计玻璃泡没有完全侵入C.读书时,视线应该与温度计液柱的上表面相平,而不应俯视D.应该将温度计取出读数,而不应该放在水中读数15.某同学做完“观察水的沸腾”实验后,根据记录的实验数据作出了水沸腾温度前后的温度变化图象(如图所示)。

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第11周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第11周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第11周)一、单选题1.下到方程组中,属于二元一次方程组的是()A.B.C.D.2.若是方程的一个解,则的值是()A.B.C.D.3.已知关于x,y的方程x2m﹣n﹣2+4y m+n+1=6是二元一次方程,则m,n的值为()A.m=1,n=-1 B.m=-1,n=1 C.D.4.已知是二元一次方程的一组解,则的值是()A.B.C.D.5.2020年中考,兴仁二中为安置100名女生入住,需要同时租用6人间和4人间两种客房,若每个房间都住满,则租房方案共有()A.7种B.8种C.10种D.12种6.方程组的解为,则和的值分别为()A.1,2 B.5,1 C.2,3 D.2,47.如果与是同类项,则()A.B.C.D.8.已知,用表示,得()A.B.C.D.9.若关于的二元一次方程组的解也是一元—次方程的解,则的值为()A.B.C.D.二、填空题10.请写出一个关于的二元一次方程________.11.小红买了80分、120分的两种邮票,共花掉16元钱(两种邮票都买),则购买方案共有种.12.若最简根式与是同类二次根式,则 _____.13.如果是方程2x﹣3ay=16的一组解,则a=______.14.关于的一次函数的图象与直线平行,且经过,则这个一次函数的表达式是__________.15.已知关于、的方程组和的解相同,则__________.16.商店里把塑料凳整齐地叠放在一起,据图的信息,当有10张塑料凳整齐地叠放在一起时的高度是_______cm.三、解答题17.已知关于x的方程a﹣5x=﹣6与方程3x﹣6=4x﹣5有相同的解,求a的值.18.先化简,再求值:,其中a,b满足19.阅读下列解方程组的方法,然后回答问题.解方程组.解:由①②,得,即③,③,得④,②④得,从而可得,原方程组的解是.(1)请你仿照上面的解题方法解方程组:;(2)请大胆猜测关于x,y的方程的解是什么?(不用写解答过程)20.关于x,y的二元一次方程组的解的差为4,求k的值.。

2020-2021学年度山东省滕州市张汪中学周末拓展提高练习八年级英语(2021年12月6日)

2020-2021学年度山东省滕州市张汪中学周末拓展提高练习八年级英语(2021年12月6日)

2021-2021学年度山东省滕州市张汪中学周末拓展进步练习八年级英语〔2021年12月6日〕一、完型填空A lot of students are having all kinds of sports on the sports field. A football game is going on right now____Class 3 and Class 4. We don’t know which team will____Look at those people over there! Some students of Class 1 are practicing the____jump. One of them is the best high jumper in the school. He practices hard every day. Many people think he will____the school record (记录) in the sports meet next spring. Not far away from them, some girls are preparing for a race. They____have a 600-meter race in ten minutes. Now on the corner of the field, you can see another group (群) of students. Their teacher is telling them____to throw discus (铁饼).In schools,____students love sports now. Sports help people to keep____They also help people to live happily. And____doing sports on the sports field, many people will____good friends, too. Do you think so?1., A.in, B.between, C.from, D.of2., A.win, B.winning, C.fall, D.falling3., A.long, B.far, C.high, D.tall4., A.break, B.turn, C.leave, D.name5., A.were, B.going to, C.were going to, D.will6., A.what, B.how, C.which, D.that7., A.much and much, B.most and most, C.many and many, D.more and more8., A.health, B.tired, C.healthy, D.happy9., A.in, B.before, C.after, D.over10., A.become, B.change, C.get, D.bring, 二、阅读理解Life in the future will be different from life today. Between then and now many changes will happen. But what will the changes be?The population is growing fast. There will be many people in the world and most of them will live longer than people live now.Computers will be much smaller and more useful, and there will be at least one in every home. And computer studies will be one of the most important subjects in schools then. People will work fewer hours than they do now and they will have more free time for sports, watching TV and traveling. Traveling will be much cheaper and easier. And many more people will go to other countries for holidays.There will be changes in our food, too. More land will be used for building new towns and houses for all the people. Then there will be less room for cows and sheep,so meat will be moreexpensive. Maybe no one will eat it every day. Instead, they will eat more fruit and vegetables. Maybe people will be healthier.Work in the future will be different, too. People will work fewer hours than they do now. Robots will do dangerous and hard work. Because of this, many people will not have enough work to do. This will be a problem.11.In the future there will be ________.A.more people, B.less fruitC.fewer vegetables, D.more cows12.Every family will have at least a ________ in the future.A.robot, B.cowC.TV set, D.computer13.In the future people don't have to ________.A.work long hours, B.work fastC.walk to work, D.eat meat14.People may not eat ________ as much as they do today.A.fruit, B.fish, C.meat, D.rice15.One big problem in the future is that ________.A.many people don't have to workB.many people will not be able to find workC.people have to work fastD.all the work will be done by robotsOur life will be different from now with robots appearing in our home. So what will the future be like?Here are some students' ideas.I expect to live in a more beautiful and cleaner city. The street will be cleaned by the robots once a day.—BenThere will be more kinds of food to choose from and the food will be more delicious.The robots can make the food for us.—KarenWe do not have to spend much time on heavy work because robots will take most of our work,for example,washing the clothes. So we will have more vacations. We can take a vacation on themoon. We will not live on the earth but on the moon or other planets.—MarkI expect that most families will have their own planes made by their robots. And travel will—SueI expect robots can make the clothes for us. The clothes could change their size and color by themselves.—Sam16.There will be ________ for us in the future.A.fewer vacations, B.more money, C.more types of food, D.more work17.Robots will NOT help us to ________.A.clean the city, B.wash clothes, C.cook, D.drive a plane18.Which is NOT true according to the passage?A.We can travel to the moon.B.There may be no person on the earth.C.We can spend little time on housework.D.The train will be the fastest transportation.19.The underlined word “convenient〞means “________〞.A.easy, B.crowded, C.boring, D.quiet20.What is the best title for the passage?A.Robots in the Future, B.Cities in the FutureC.Transportations in the Future, D.Future Life with RobotsWilma Rudolph was a great American athlete (运发动). She was from a large family. There were 22 children in her family. When Wilma Rudolph was four, she got a very serious illness (疾病). From then on, she couldn’t walk any more.Wilma’s mother decided to do everything she could to help Wilma to walk again. She took Wilmadoctors’ advice and massaged (按摩) her daughter’s legs every day. Wilma’s brothers and sisters also massaged Wilma’s legs every day.With the help of her family, Wilma Rudolph got better and better. When she was eight, she could walk with a leg brace (腿支架). Three years later, she could play basketball without the leg brace.Wilma Rudolph started to run in high school. In the 1960 Olympic Games, she won three gold medals. Her experience encouraged (鼓励) many people.21.What happened to Wilma when she was four?A.She couldn’t see., B.She couldn’t walk.C.She couldn’t speak., D.She couldn’t hear.22.What does the underlined word “it〞refer to?A.The therapy that Wilma got.B.The hospital that Wilma was in.C.The time that Wilma spent in hospital.D.The massage on Wilma’s legs.23.What’s the right order of Wilma’s experience?① She got a serious illness.② She started to run in high school.③ She could walk with a leg brace.④ Her brothers and sisters massaged her legs.A.①③②④, B.①④③②, C.④①③②, D.③①④②24.Which of the following is TRUE?A.There were more than 22 children in Wilma’s family.B.Wilma’s father took her to hospital to get therapy.C.Wilma won three gold medals in the 1960 Olympics.D.Wilma could play basketball when she was seven years old.25.Where can we find this passage?A.In a sports magazine.B.In a science book.C.In someone’s travel diary.D.In the New Year’s resolution., 三、情景交际(其中有两项为多余选项)A:Let's talk about the future. I think it always makes us excited.B:I agree with you.26.A:I think there will be a car in every home.B:But I think cars will make more pollution.A:No. 27.B:Great. Do you think people will have more free time in the future?A:Yes.28. They will help people do some work.B:I hope so.29.A:No. I think more people will live in the countrysideB:Why?A:Because the air there is very fresh. It's good for people'shealth.30.B:You're right.A.Cars in the future will be green ones.B.That's because there will be more robots.C.Will people live to be 200 years old?D.What's your prediction about the future?E.Do you think it will be more crowded in the future?F.More people will care about their physical health.G.Everything will be free., 四、语法填空home, planted them in the garden and watered them every day. Some days later, he hadplants when I’m out.Some boys of neighbors always want to steal(偷) them.〞Six days passed and Mr. Jackson came back. As soon as he saw Tom, he asked, “DidNow they are here for nearly a week!〞, 五、用所给单词的适当形式填空41.If we don't stop ________ (pollute) the water, farmers won't use thewater for their plants.42.Everyone can make a difference to the environmental ______ (protect) in their daily life. 43.They ______ (plant) some trees to protect the land next month.44.There are eight______ (planet) around the sun.45.How bright our ______(future) will be!, 六、完成句子46.我认为每家都会有一个机器人。

度山东省滕州市张汪二中周末提优卷初二物理试卷(12月7日)

度山东省滕州市张汪二中周末提优卷初二物理试卷(12月7日)

度山东省滕州市张汪二中周末提优卷初二物理试卷(12月7日)八年级物理试题(2021年12月7日)一、单选题1.下列现象属于光的折射的是A.在水池边看到水中的鱼, B.月食的形成C.安静的水面倒映出蓝天白云, D.茫茫白雪看上去专门耀眼2.鱼儿在清亮的河水里游动,有体会的渔民看到鱼后,能够用鱼叉将鱼叉到。

下列说法错误的是A.渔民应该用鱼叉喵准鱼的下方位置,才能将鱼叉到B.渔民看到的鱼是光的折射形成的虚像C.渔民能看到水中的鱼是因为水中的鱼反射的光经折射后,进入了人的眼睛D.渔民看到水中的鱼比实际位置浅是因为人眼发出的光从空气射入水中发生折射造成的3.游泳池池边有一位运动员甲可通过水面看到路灯的倒影,水下有一运动员乙正在潜水可通过水面看到岸上的路灯,当运动员甲从A地走到B 地,运动员乙从C地潜到D地,有关他们所看到灯的叙述正确的是A.甲看到灯的位置在变化乙看到灯的位置不变B.乙看到灯的位置在变化甲看到灯的位置不变C.两人看到的灯的位置都不变D.两人看到灯的位置都在变化4.我们把筷子放入水中时,你看到的筷子的“像”应该是()A., B., C., D.5.如图所示,一束光线斜射入盛水的容器中,在容器底部形成一个光斑.打开阀门K,容器里的水逐步流出的过程中,光斑将()A.向左移动后静止B.向右移动后静止C.先向左移动再向右移动D.仍在原先位置6.如图,一束光线跟水平面成450角,从空气中斜射到水面时,发生了反射和折射,则反射光线和折射光线的夹角是()A.等于900, B.小于900, C.大于900, D.18007.能正确反映水中的筷子看起来向上偏折的光路是()A., B., C., D.8.如图是两个并排而且深度相同的水池,一个装水,另一个未装水,在两池的中央各竖立着一只长度相同而且比池深略高的标杆。

当阳光斜照时就会在池底形成杆的影子,下列说法正确的是A.装水的池中标杆影子较长, B.未装水的池中标杆影子较长C.两池中标杆影子长度相同, D.装水的池中标杆没有影子9.光从空气斜射入玻璃中,入射角为60°,则折射角可能A.等于0°, B.小于60°, C.等于60°, D.大于60°10.陶瓷茶杯底部放有一枚硬币,人移动到某一位置时看不到硬币(如图甲所示)。

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第五周)(无答案)

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第五周)(无答案)

2019-2020学年度山东省滕州市张汪中学周末拓展提高练习八年级物理(第五周)一、选择题1.下列关于声现象的说法,错误的是()A.声音是由物体振动产生的,以声波的形式传播B.声音的传播需要介质,在不同介质中传播速度一般不同C.“引吭高歌”“低声细语”中的“高”“低”描述的是声音的音调D.我们听不到蝴蝶翅膀振动发出的声音,是因为其振动频率低于人类听觉的下限2.中华古诗词、俗语中蕴含着丰富的声学知识,下列有关理解正确的是A.“谁家玉笛暗飞声”中的笛声由笛管的振动产生B.“响鼓还要重锤敲”说明声音的音调与振幅有关C.“闻其声而知其人”是根据声音的响度来辨别的D.“柴门闻犬吠,风雪夜归人”说明声音可传递信息3.公共场所不要高声喧哗,这里的“高”是指声音的A.响度B.音调C.音色D.频率4.在音乐会上,我们很容易分辨出二胡和笛子的声音,判断的依据是A.响度B.音色C.音调D.频率5.看电视时调节音量是为了改变声音的A.响度B.音调C.音色D.音调、响度和音色6.远古时代,鼓被赋予神秘色彩。

如图是湖北崇阳出土的商代铜鼓。

关于鼓声,下列说法正确的是( )A.鼓声能在真空中传播B.鼓面振动的幅度越大,响度越大C.鼓声的音色与鼓的材料、结构无关D.区分鼓声和其他乐器声是根据音调不同7.赛龙舟不仅是一项体育娱乐活动,更体现我国悠久历史文化传承。

如图所示为某比赛场景,下列说法错误的是A.选手根据鼓声齐心协力划桨,鼓声是由鼓面振动产生的B.选手听到鼓声大作,震耳欲聋,说明此时鼓声的响度大C.选手能从现场各种声音中听出鼓声,主要是通过鼓声的音色来辨别的D.鼓手敲击鼓面越快,鼓声在空气中传播的速度也越快8.小明看到闪电后12.3s又听到雷声.已知声音每3s传播的距离约为1000m,光速约为3×108m/s,于是他用12.3除以3很快估算出闪电发生位置到他的距离为4.1km。

假设声速或光速发生以下变化,这种估算方法不再适用的是A.声速增大为原来的两倍B.声速减小为原来的一半C.光速减小为原来的一半D.光速减小为声速的两倍9.十四个无声世界的孩子在中央电视台《经典咏流传》的舞台上,用一个“啊”字唱出了“整个春天”。

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第4周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第4周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第4周)一、单选题1.下列各式中,正确的是()A.B.C.D.2.在实数,,,中,最小的数是()A.B.C.D.3.的平方根是()A.B.C.D.4.在实数3.14,,,-5π,0.3030030003......,中无理数有()个A.1个B.2个C.3个D.4个5.如图,AB = AC,则数轴上点C所表示的数为()A.B.—1 C.-+1 D.+1 6.若,则x和y的关系是( ).A.x=y=0 B.x和y互为相反数C.x和y相等D.不能确定7.下列各组数中互为相反数的是()A.与B.与C.与D.与8.已知,化简二次根式的正确结果为()A.B.C.D.9.实数a、b在数轴上的位置如图所示,则化简后﹣|a+b|的结果为()A.2a﹣b B.﹣2a+b C.2a+b D.b10.对于有理数a、b,定义min{a,b}的含义为:当a<b时,min{a,b}=a,例如:min{1,-2}=-2.已知min{,a}=a,min{,b}=,且a和b为两个连续正整数,则a-b的立方根为()A.-1 B.1 C.-2 D.211.下列各数中,与的积为有理数的是()A.B.C.D.12.已知面积为10的正方形的边长为,那么的取值范围是()A.B.C.D.二、填空题13.___________.14.对于实数a,b,定义运算“※”如下:a※b=a2﹣ab,例如,5※3=52﹣5×3=10.若(x+1)※(x﹣2)=6,则x的值为_____.15.若,则m-n的值为_____.16.观察下列各式:,,,……请你将发现的规律用含自然数n(n≥1)的等式表示出来__________________.17.已知,则的平方根为__________.18.﹣64的立方根与的平方根之和是_____.19.已知a+1=20192+20202,计算:_____.20.已知,则_______.三、解答题21.先化简,再求值:,其中.22.计算:23.先化简,再求值:,其中,满足.24.如图,数轴的正半轴上有A,B,C三点,表示1和的点分别为点A,B,点B到点A 的距离与点C到点O的距离相等,设点C表示的数为x.(1)求x的值;(2)求(x-)2的立方根.。

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第16周)(无答案)

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第16周)(无答案)

2019-2020学年度山东省滕州市张汪中学周末拓展提高练习八年级物理(第16周)一、选择题1.学习质量和密度的知识后,小明同学想用天平、量筒和水完成下列实践课题,你认为能够完成的是①测量牛奶的密度②鉴别金戒指的真伪③测定一捆铜导线的长度④鉴定铜球是空心的还是实心的⑤测定一大堆大头针的数目.A.①②③④⑤B.①②④⑤C.①②④D.①②2.已知铜密度为8.9×103kg/m3,酒精密度为0.8×103kg/m3,把一金属铜块放入盛满水的杯子中,从杯中溢出水20g,若把该铜块放入另一盛满酒精的杯子中,则从杯中溢出酒精的质量是()A.20g B.10g C.16g D.8g3.甲、乙两种物质的m-V图象如图所示,分析图象可知A.若甲、乙的质量相等,则甲的体积较大B.若甲、乙的体积相等,则甲的质量较小C.甲、乙两物质的密度之比为4:1D.甲、乙两物质的密度之比为1:44.三个完全相同的杯子里面装有水,把质量相同的实心铜块、铁块、铝块依次放在甲、乙、丙三个杯子中,水面恰好相平,原来装水最多的杯子是(ρ铜>ρ铁>ρ铝)A.甲杯B.乙杯C.丙杯D.原来装水一样多5.三个质量和体积都相同的空心球,分别用铜、铁、铝制成,则三个球的空心部分体积A.铁球最小B.铝球最小C.铜球最小D.无法判断6.甲、乙两种液体的质量之比为1:2,密度之比为5:4,则体积之比为A.5:2 B.2:5 C.1:2 D.2:17.用烧杯盛某种液体,测得液体与烧杯共同质量m和液体体积V的关系如图所示,则下列说法正确的是()A.该液体的密度是3g/cm3B.由图像可知,该液体体积越大,密度越小C.该液体体积是50cm3时,液体的质量是90gD.烧杯的质量是40g8.一瓶矿泉水喝去半瓶,则剩下的半瓶矿泉水()A.质量减半,密度减半B.质量减半,密度不变C.体积减半,密度减半D.质量、体积、密度均减半9.图甲为“水的密度在0~10°C范围内随温度变化”的图象,图乙为北方冬天湖水温度分布示意图,根据图象及水的其他性质,下列分析判断正确的是A.水在4°C时密度最小B.4°C以上的水,具有热缩冷胀的性质C.水在0 ~4°C范围内,具有热缩冷胀的性质D.示意图中从A到E ,湖水的温度逐渐降低10.如图所示,三只相同的杯子中分别装有质量相等的水、煤油和盐水(ρ盐水>ρ水>ρ煤油),则下列判断正确的是( )A.甲杯是盐水,乙杯是水,丙杯是煤油B.甲杯是水,乙杯是煤油,丙杯是盐水C.甲杯是煤油,乙杯是盐水,丙杯是水D.甲杯是煤油,乙杯是水,丙杯是盐水11.为了避免人体肩部受到伤害,专家建议人肩负的书包总质量不要超过人体质量的15%,根据建议,你估计中学生肩负的书包总质量通常不要超过A.9mg B.9g C.9kg D.9t12.夏天来了,一些同学喜欢自制冰棒,他们将一杯80g的水放入冰箱中,完全结冰后,其质量A.仍是80g B.大于80g C.小于80g D.不能确定二、填空题13.浏阳腐乳以其口感细腻、味道纯正而远近闻名,深受广大消费者喜爱.现测得一块腐乳的质量约为10g,体积约为8cm3,则其密度为_______kg/m3.若吃掉一半,剩余部分密度将________(选填“变小”“变大”或“不变”).14.将500毫升的水全部结成冰块,其体积将______,质量将______。

山东省滕州市张汪中学2020-2021学年度第一学期八年级数学期末复习综合练习题

山东省滕州市张汪中学2020-2021学年度第一学期八年级数学期末复习综合练习题

2020-2021学年度第一学期山东省滕州市张汪中学期末复习综合练习题八年级数学一、单选题1.下列命题中,是真命题的是()A.同旁内角互补B.三角形的一个外角等于它的两个内角之和C.是最简二次根式D.两直线平行,内错角相等2.平面直角坐标系中,点A(﹣2,1)到x轴的距离为()A.﹣2 B.1 C.2 D.3.如为实数,在“□”的“□”中添上一种运算符号(在“+”、“-”、“×”、“÷”中选择),其运算结果是有理数,则不可能是()A.B.C.D.4.在实数、3.1415、π、、、2.123122312223……(1和3之间的2逐次加1个)中,无理数的个数为()A.2个B.3个C.4个D.5个5.已知正方形ABCD中,A(-3,1),B(1,1),C(1,-3),则D点的坐标是()A.(-3,-3)B.(-1,1)C.(-3,3)D.(1,3)6.如图是某商场一天的运动鞋销售量情况统计图.这些运动鞋的尺码组成的一组数据中,众数和中位数分别为( )A.25,25 B.25,24.5 C.24.5,25 D.24.5,24.57.某一次函数的图象经过点(1,2),且随的增大而增大,则这个函数的表达式可能是()A.B.C.D.y=-4x+28.数轴上表示2,的对应点分别是A、B,点B关于A的对称点是C,则点C表示的数为()A.-2 B.2-C.4-D.-49.一次函数与(k,b为常数,且kb≠0),它们在同一坐标系内的图象可能为( )A.B.C.D.10.已知一次函数的图像与轴、轴分别交于两点,当的面积为时,那么的值是()A.B.C.D.二、填空题11.一组数据1,3,,4,5的平均数是3,则=___________.12.一个直角三角形,一边长5cm,另一边长4cm,则该直角三角形面积为____13.某班20位同学在植树节这天共种了52棵树苗,其中男生每人种3棵,女生每人种2棵.设男生有人,女生有人,可列方程组为___________.14.若二次根式与是同类二次根式,则整数可以等于___________.(写出一个即可)15.如图,在的纸片中,,,.点在边上,以为折痕将折叠得到,与边交于点.若为直角三角形,则的长是_______.16.如图,要为一段高5m,长13m的楼梯铺上红地毯,至少需要红地毯______m.17.将一副直角三角尺所示放置,已知,则的度数是__________.18.将函数y=2x的图像先向左平移2个单位长度,再向下平移3个单位长度,则得到的图像相应的函数表达式为_________.19.已知,那么的值是___________.20.对x,y定义一种新运算“※”,规定:x※y=mx+ny(其中m,n均为非零常数),若1※1=4,1※2=3.则2※1的值是____.三、解答题21.计算:.22.解方程(组):(1);(2).23.某移动通讯公司开设两种业务.“全球通”:先缴50元月租费,然后每通话1跳次,再付0.4元;“神州行”:不缴月租费,每通话1跳次,付话费0.6元(本题的通话均指市内通话).若设一个月通话x跳次,两种方式的费用分别为元和元.(跳次:1分钟是1跳次,不足1分钟按1跳次算,如3.2分钟为4跳次)(1)写出和与间的函数关系式;(2)一个月通话多少跳次,两种费用相同?(3)某人估计一个月内通话300跳次,应选择哪种合算?24.已知是等腰直角三角形,,.直角顶点C在x轴上,锐角顶点B在y轴上,过点A作轴,垂足为点D.当点B不动,点C在x轴上滑动的过程中.(1)如图1,当点C的坐标是,点A的坐标是时,请求出点B的坐标;(2)如图2,当点C的坐标是时,请写出点A的坐标;(3)如图3,过点A作直线轴,交y轴于点E,交BC延长线于点F.AC与y轴交于点G.当y轴恰好平分时,请写出AE与BG的数量关系.25.如图1,在平面直角坐标系中,直线:分别与轴,轴交于,两点,直线与轴交于点,与交于第四象限内的点,已知点到轴的距离为,.(1)求直线的解析式;(2)如图2,将轴向左平移2个单位长度得到直线,在轴负半轴取一点,动点,分别在直线,和轴上运动,连接,,,求的最小值;。

山东省滕州市张汪二中2020-2021学年度第一学期周末提优卷八年级数学试题

山东省滕州市张汪二中2020-2021学年度第一学期周末提优卷八年级数学试题

山东省滕州市张汪二中2020-2021学年度第一学期周末提优卷八年级数学试题(2020年9月25日)一、单选题1.下列等式正确的是()A.B.C.D.2.下列结论正确的是()A.的立方根是B.没有立方根C.有理数一定有立方根D.的立方根是-13.估计(9﹣)÷的值应在()A.5和6之间B.6和7之间C.7和8之间D.8和9之间4.实数a,b在数轴上对应点的位置如图所示,化简|a| + 的结果是( )A.-2a+ b B.2a-b C.-b D.b5.已知,则的值为()A.B.C.D.6.在实数中,无理数有()A.2个B.3个C.4个D.5个7.函数的自变量的取值范围是()A.B.C.D.且8.按下面的程序计算:若开始输入的值为,最后输出的结果的取值范围是()A.B.C.D.9.已知,,且,则的值为()A.2或12 B.2或C.或12 D.或10.实数n、m是连续整数,如果,那么m+n的值是()A.7 B.9 C.11 D.1311.如图,在Rt△ABC中,∠ACB=90°.AC=BC.边AC落在数轴上,点A表示的数是1,点C表示的数是3,负半轴上有一点B₁,且AB₁=AB,点B₁所表示的数是()A.-2 B.-2 C.2-1 C.1-212.某整数的两个不同平方根是与,则这个数是()A.1 B.3 C.-3 D.9二、填空题13.已知,则代数式的值是________.14.计算:_______________.15.化简:__________;__________.16.已知实数x,y满足(-1)=6,则x+y=_______.17.已知,且,为两个连续的整数,则___________.18.估计与0.5的大小关系是:_____0.5.(填“>”、“=”、“<”)19.若的整数部分为,小数部分为,则的值为_______.(结果化为最简)20.若已知+(y+2)2=0,则(x+y)2019等于_____.三、解答题21.计算:(1)(2)22.已知=,求代数式的值.23.对于任意有理数,我们规定:,例如.(1)按照这个规定,当时,请你计算:.(2)按照这个规定,若,求的值.24.(1)观察下列各式的特点:,,…根据以上规律可知:.(2)观察下列式子的化简过程:,,……根据观察,请写出式子()的化简过程:(3)计算下列算式:。

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级英语(第9周)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级英语(第9周)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级英语(第9周)一、完型填空Once a small boy lived on a farm which seemed so far away from everywhere.He needed to _______ before sunrise every morning to help his father on the farm. During sunrise he would take a break and climb up on the fence ( 栅栏) along the side of the farm. He could see a house with_________windows. "If they could buy golden windows, then there must be _________nice things inside the house." He thought how _________it would be to live there. Then he told himself, "Someday I will go there and see this wonderful place."One morning, his father would go to the town and told him to stay at home for _________. Knowing that this was his chance (机会), he took a sandwich and headed across the field toward the house with the golden windows.As the afternoon went on, he began to realize how _________ he was. The house was much _______than he had thought. As he went near the house, he saw _________ golden windows but instead a place in bad need of painting.A small girl very close to his age came out of the poor house and stood by the broken fence. He asked her if she had seen the house with the golden windows.The girl said, "Sure, I know." and invited him to sit on the porch ( 门廊). As he sat there, he _________ back from where he just came. There he saw the __________ turned the windows of his house to gold. Now heunderstood that everyone had his own house with golden windows.1.A.get up B.make breakfast C.do exercise2.A.red B.brown C.golden3.A.another B.other C.the other4.A.bad B.great C.nervous5.A.a rest B.a test C.some reading6.A.clever B.wrong C.fast7.A.closer B.more beautiful C.farther (更远的)8.A.no B.some C.a few9.A.walked B.climbed C.looked10.A.sunrise B.sunset C.moon二、阅读单选In 1997,12-year-old American girl Caitlin and 14-year-old Zimbabwean (津巴布韦人) Martin became pen friends through their schools. They didn’t realize at that time how their handwritten letters would change their lives.It all began as a school task. Everyone in Caitlin’s class was supposed to choose a pen friend from another country.All the other kids picked countries like France or Germany, but Caitlin chose Zimbabwe because the name sounded exotic(异国的) and cool.Martin lived with his family in one of Zimbabwe’s worst slums(贫民窟) where they shared one room with another family. And a bed was their only piece of furniture.When Caitlin’s first letters re ached Martin, they were simple and general. The two kids wrote about their favorite music and what they liked to do. But as Martin gradually revealed more about his life and his letters started arriving written on pieces of trash, Caitlin realized what the living conditions were like for Martin. Without telling her parents, she began sending money with her letters—$ 20 at a time. While the money was not much to Caitlin, it meant more food for Martin’s family and enabled him to pay his school fees.It lasted six years from their first exchange of letters to Martin’s arrival in the United States. With the help of the money from Caitlin’s parents later on, Martin finished his university and got his MBA from Duke University. Today, Caitlin and Martin aren’t only best friends, but they also share their story in a book called I Will Always Write Back. They want to encourage readers to look beyond their own lives and do something kind for others, which might greatly influence their lives.11. is from Zimbabwe?A.Duke B.Caitlin C.Martin D.Frank12.What does the underlined word “revealed” mean in Chinese?A.索要B.透露C.回顾D.检索13.Which is the correct order of the following events?a. They shared their story in a book.b. Caitlin’s first letters reached Martin.c. Caitlin chose a pen friend from Zimbabwe.d. Martin got his MBA from Duke University.A.a-b-c-d B.a-b-d-c C.c-b-d-a D.c-d-b-a14.According to the passage, which of the following is not TRUE?A.Caitlin chose Zimbabwe because the name sounded exotic and cool.B.Martin lived a very hard life in one of the worst slums in Zimbabwe.C.Martin’s family could get more food with Caitlin’s money in the letters.D.They had kept writing to each other for five years before Martin arrived in the US.15.Which would be the best title for this passage?A.The Two Pen Friends B.The Power of WritingC.The Special School Task D.The Money in LettersAre you good with money? Do you get pocket money from your parents or do your work to make money? Read on to find about British teenagers and their cash!Pocket moneyMost teenagers in Britain receive pocket money from their parents. They might have to do housework to get their pocket money. The housework can include cleaning, cooking, washing dishes and ironing.Part-time workA part-time job is an option (选择) for teenagers who don’t have pocket money or who want to earn more money. About 15 percent of teenagers have a job. Only children over the age of 13 can work. Popular part-time jobs for teens include babysitting, delivering newspapers, shop work and restaurant work.Children in Britain can work at most two hours a day on a school day but not during school hours. During weekends and school holidays, they can work longer hours.Bank account (账户)Some children and teenagers have a bank account. There is no legal (法定的) age limit (限制) at which you can open a bank account, but a bank manager can decide whether to open an account for a child or young person. Parents can put pocket money into their child’s bank account. Most banks have a prepaid (预付的) bank card designed for young people.So, many teenagers are getting experience working part-time, dealing with banks and deciding whether to save or spend their money. These are steps to become a financially independent (财政独立的) person and earning and looking after your own money.16.Teenagers can NOT get pocket money from _______ according to the passage.A.parents B.part-time job C.school17.Teenagers can do _______ as a part-time job when they want to make extra money.A.cleaning B.ironing C.babysitting18.Teenagers can open bank accounts _______.A.if their parents agreeB.to put their pocket money inC.when they are over 13 years old19.Which statement is TRUE?A.Children can work 3 hours a day on their school days.B.An 8-year-old boy can deliver newspapers as a part-time job.C.Teenagers can decide to save or spend the money by themselves.20.This passage show us _______.A.different ways to make moneyB.the importance of having a bank accountC.how teenagers in Britain get and deal with their moneyThirteen-year-old Cindy had been bullied(欺凌) at school for about two years. Her bag, keys and mobile phone had been stolen. She had also been knocked off her bicycle, kicked and punched(以拳重击).Cindy tried to fight back, but it always seemed to be her, not the bullies, who got into trouble. She became so afraid of going to school that she started to be absent from her classes.Finally, her headmaster set up a special plan, asking students to look after one another. He gave Cindy the courage to play the guitar in a school concert, Which gave Cindy new confidence and helped her respect from the other students. Gradually, the bullying began to stop.Cindy’s story is not uncommon, but help is always there. All students in the UK n ow have to follow strict bullying policies(政策). There are many charities and organizations giving support to young people, such as BullyingUK and Childine. So remember one very important piece of advice: If you are being bullied, don’t put up with it – tell someone.21.How old was Cindy when she was first bullied?A.About 7 years old. B.About 9 years old.C.About 11 years old. D.About 13 years old.22.Why was Cindy absent from her classes?A.Because she couldn’t deal with her troubleB.Because she was afraid of her teachers.C.Because she liked playing.D.Because she had to work.23.How did Cindy receive respect?A.By fighting back. B.By setting up a special plan.C.By playing the guitar in a school concert. D.By asking an organization for help.24.The underlined phrase "put up with" in the last paragraph mean "_________" .A.stand B.refuse C.notice D.miss25.What is the best title for the passage?A.Disadvantages of bullying B.Bullying policiesC.Leave bullying alone D.Say no to bullying三、补全短文7选5Many people are trying to save the earth with special days like “Meatout Day”, “Earth Day” and “Buy Nothing Day”.Meatout Day“Meatout Day” is on March 20th. 26.Join this day, and you'll get healthier. Also, you can reduce greenhouse gases(减少温室气体)and save the earth.Earth Day27. Many people all over the world try to do something green on this day. In Italy, people don't use plastic bags. In Canada and Norway, people ride bicycles and don't use their cars. In the USA, people dress up like plants and animals and dance in Times Square, New York.Buy Nothing Day“Buy Nothing Day” is usually on the fourth Friday in November in America. 28.“Buy Nothing” means “make no rubbish”. 29..Do you want to join them? 30..根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项, 选项中有两项为多余选项。

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第12周)(无答案)

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第12周)(无答案)

2019-2020学年度山东省滕州市张汪中学周末拓展提高练习八年级物理(第12周)一、选择题1.一束光线在平面镜上(如图所示),下图中正确表示光的反射的是A.B.C.D.2.一束光由空气斜射入水中,当入射角逐渐减小时,折射角的大小将A.折射角逐渐增大B.折射角的大小不变C.折射角逐渐减小,但总小于入射角D.折射角逐渐减小,但总大于入射角3.舞蹈演员站在平面镜前训练,下列说法正确的是A.演员在平面镜中成实像B .演员以的速度靠近平面镜,像也以的速度靠近平面镜C.演员靠近平面镜时,像远离平面镜D.演员远离平面镜时,他在平面镜中所成的像变小4.比较光现象和声现象,下列说法中正确的是A.光和声音在介质中的速度都比在真空中的速度大B.光和声音在一切介质中都能传播C.光能在真空中传播,声音不能在真空传播D.光和声在固体中的传播速度最大5.某同学从平面镜里看到镜子对面的电子钟的示数如图所示,这时的实际时间是A.10:51 B.21:10C.10:21 D.12:016.观察水上风景的照片,总能看到“倒影”部分比景物本身暗一些,这是由于A.冲洗的照片有质量问题B.入射光线有一部分折射进入水中C.眼睛产生的感觉D.入射光线被反射掉了一部分7.下列有关光现象的说法中,正确的是A.光在水中的传播速度是3×108m/sB.彩色电视的画面上的色彩是由红、绿、蓝三种色光混合而成C.正在放映的投影屏幕是光源D.物体呈黑色是因为它能反射一切色光8.太阳光与水平方向成30°角射向平面镜,要使反射光沿水平方向传播,则平面镜与水平方向所成的角度(锐角)是A.或B.或C.或D.只能是9.高高的电线杆上悬挂着一盏电灯,晚上一个人从亮着的电灯下经过,则他的影子的长短变化情况是A.逐渐变短B.逐渐变长C.先变长后变短D.先变短后变长10.一个喷水池,在池底的中央安装了一只射灯。

池内无水时射灯发出的一束光照在池壁上,在S点形成一个亮斑,如图所示。

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第14周)(无答案)

2019-2020学年山东省滕州市张汪中学周末拓展提高练习八年级物理(第14周)(无答案)

2019-2020学年度山东省滕州市张汪中学周末拓展提高练习八年级物理(第14周)一、选择题1.我们经常提到的像有:①小孔成像;②平面镜成像;③放大镜成像;④电影银幕上的像;⑤汽车观后镜中的像。

其中A.由于反射而形成的像是⑤B.由于折射而形成的像是③④C.属于实像的是①②③D.属于虚像的是②③④2.当物体距凸透镜10cm 时,在透镜的另一侧光屏上成一个清晰的像,若只将凸透镜向光屏方向移动2cm,则在光屏上又成一个清晰的像,那么该透镜的焦距f 的范围为A.5cm<f<10cm B.5cm<f<6cm C.4cm<f<6cm D.无法确定3.在凸透镜的二倍焦距以外的地方,沿主光轴方向放一根粗细均匀的棒AB,如下图所示,则形成的像A′B′将A.比实物长,且A′端比B′端细B.比实物长,且B′端比A′端细C.比实物短,且A′端比B′端细D.比实物短,且B′端比A′端细4.在儿童乐园,摄影师给卡通人物照相.在对焦时,发现毛玻璃上卡通人像的位置如图甲所示.为了使毛玻璃上卡通人像的位置如图乙所示,摄像师应当将镜头适当地A.向下并且向右移B.向下并且向左移C.向上并且向左移D.向上并且向右移5.如图,用手机扫描二维码,相当于给二维码拍了一张照片,手机摄像头相当于凸透镜,影像传感器相当于光屏,下列说法正确的是()A.物体上的二维码是光源B.扫码时二维码要位于摄像头二倍焦距以外C.要使屏幕上二维码的像变小,只需将二维码靠近凸透镜D.当二维码超出手机上设定的方框时,物品不动,应把手机靠近物品6.如图所示,此时蜡烛通过凸透镜在光屏上形成一个清晰的像,现保持凸透镜和竖屏的位置不变,将蜡烛的位置移动到P点,则光屏上()A.无像B.成倒立、缩小的实像C.成倒立、放大的实像D.成正立、放大的实像7.2008年北京奥运会将全面使用人脸识别系统,人们进入场馆距门口0.5m~1.2m处时,安装在门上的人脸识别系统的摄象机就可以对其面部特征进行快速核对。

山东省滕州市张汪二中2020-2021学年度第一学期周末提优卷八年级数学试题(12月11日)

山东省滕州市张汪二中2020-2021学年度第一学期周末提优卷八年级数学试题(12月11日)

山东省滕州市张汪二中2020-2021学年度第一学期周末提优卷八年级数学试题(2020年12月11日)一、单选题1.一个直角三角形两边长分别是和,则第三边的长是()A.B.或C.或D.2.某班七个兴趣小组人数分别为,,,,,,.已知这组数据的平均数是,则这组数据的众数和中位数分别是()A.,B.4,C.,D.,3.如图,数轴上点表示的数可能是()A.B.C.D.4.的算术平方根是()A.B.4 C.D.25.如图,一次函数y=kx+b图象与x轴的交点坐标是(2,0),则下列说法:①y随x的增大而减小;②b>0;③关于x的方程kx+b=0的解为x=2.其中说法正确的是()A.①和②B.①和③C.②和③D.①②③都正确6.在运动会径赛中,甲、乙两人同时起跑,刚跑出米甲不慎摔倒,他又迅速地爬起来继续投入比赛.他们所跑的路程与比赛时间的关系如图,有下列说法:①他们进行的是比赛;②乙全程的平均速度为③甲摔倒之前,乙的速度快:④甲再次投入比赛后的平均速度为;⑤甲再次投入比赛后在距离终点米时追上了乙其中正确的个数有()A.1 B.2 C.3 D.47.化简二次根式得()A.B.C.D.8.当1a2时,代数式+|a﹣1|的值是()A.1 B.﹣1 C.2a﹣3 D.3﹣2a9.如图,底面周长为12,高为8的圆柱体上有一只小蚂蚁要从点A爬到点B,则蚂蚁爬行的最短距离是()A.B.8 C.10 D.1210.如图,在平面直角坐标系中,A(1,1),B(2,2),直线与线段有公共点,则的取值范围是()A.B.C.D.11.若点P(x, y)在第二象限,且,则x + y =()A.-1 B.1 C.5 D.-512.若3x3y n-1与-x m+1y2是同类项,则m-n的值为()A.﹣1 B.0 C.2 D.113.若,则的平方根为()A.±2B.4 C.2 D.±4二、填空题14.已知点A(3,4)与点B关于轴对称,那么B点坐标是__.15.的相反数是________;倒数是________.16.根据如图所示的程序计算函数y的值,若输入x的值为,则输出y的值为_______.17.现在定义两种运算“”和“☆”,对于有理数,,有,,则的值为_______.18.计算:(+)2015·(-)2016=________.19.如图,将矩形沿折叠,使顶点恰好落在边的中点上,点落在处,交于点.若,则的长为_________20.如图,直线交轴于点A,交y轴于点B.以A为圆心,以AB为半径作弧交轴于点A1;过点A1作轴的垂线,交直线AB于点B1,以A为圆心,以AB1为半径作弧交轴于点A2;…,如此作下去,则点的坐标为___________;21.已知一次函数的图象过点,且与两坐标轴所围成的三角形的面积为3,则这个一次函数的表达式为______.三、解答题22.计算23.如图,直线EF与x轴、y轴分别交于点E(-8,0),F(0,6).(1)求直线EF的函数表达式;(2)若点A的坐标为(-6,0),点P(m,n )在线段EF上(不与点E重合)①求△OPA的面积S与m的函数表达式;②求当△OPA的面积为9时,点P的坐标;③求当△OPA的面积与△OPF的面积相等时,点P的坐标.24.某市电力公司采用分段计费的方法计算电费.每月用电不超过100度时,按每度0.55元计算费用,每月用电超过100度时,超过部分按每度0.60元计算.(1)设每月用电x度时,应交电费y元,写出y与x之间的函数关系式,并写出自变量的取值范围;(2)小王家一月份用了115度电,应交电费多少元?(3)小王家三月份交纳电费49.5元,求小王家三月份用了多少度电?25.某高校共有5个大餐厅和2个小餐厅,若同时开放1个大餐厅、2个小餐厅,可供1600名学生就餐;若同时开放2个大餐厅、1个小餐厅,可供2000名学生就餐.(1)求1个大餐厅、1个小餐厅分别可供多少名学生就餐?(2)按照疫情防控的就餐要求,每个大餐厅只能容纳原来就餐人数的40%,每个小餐厅只能容纳原来就餐人数的30%,若同时开放7个餐厅,能否供返校的1800名毕业生同时就餐?请说明理由.。

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第19周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第19周)(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习八年级数学(第19周)一、单选题1.在实数﹣,0,,中,是无理数的是()A.﹣B.0 C.D.2.点(3,-2)关于x轴的对称点是()A.(-3,-2)B.(3,2)C.(-3,2)D.(3,-2)3.下列关于“0”的说法中,正确的是()A.0是最小的正整数B.0没有相反数C.0没有倒数D.0没有平方根4.的算术平方根是()A.B.C.D.5.下图是用4个全等的直角三角形与1个小正方形镶嵌而成的正方形图案,已知大正方形面积为49,小正方形面积为4,若用,表示直角三角形的两直角边,下列四个说法:①,②,③,④.其中说法正确的是().A.①③B.①②③C.②④D.①②③④6.如图,在矩形ABCD中,AB=4,BC=6,点E为BC的中点,将△ABE沿AE折叠,使点B落在矩形内点F处,连接CF,则CF的长为()A.3.6 B.2.4 C.4 D.3.27.如图,已知,分别是和的角平分线,若,则的度数是A.B.C.D.8.2020年10月1日至4日,全国共接待国内游客4.25亿人次,实现旅游收入3120.2亿元,其中与4.25最接近的数字是A.B.C.D.9.如图,在平面直角坐标系中,点(1,1),(3,1),(3,3),(1,3),动点从点出发,以每秒1个单位长度的速度沿路线运动,当运动到2020秒时,点的坐标为()A.(1,1)B.(3,1)C.(3,3)D.(1,3)10.如图,线段AB将边长为1个单位长度的正方形分割为两个等腰直角三角形,以A为圆心,AB的长度为半径画弧交数轴于点C,那么点C在数轴上表示的实数是()A.B.C.D.111.如果一次函数y=kx+b(k、是常数,k≠0)的图象经过第一、二、三象限,那么、应满足的条件是()A.且B.且C.且D.且12.育红中学八五班的数学社团在做如下的探究活动:在平面直角坐标系中,一个智能机器人接到如下指令:从原点出发,按向上、向右、向下、向右的方向依次移动,每次移动1个单位长度,其移动路线如图所示,第1次移动到点,第2次移动到点……第次移动到点,则的面积是()A.1009 B.C.505 D.二、填空题13.把“不相等的角不是对顶角”改写成“如果…,那么…”的形式是_________,是____(填“真”“假”)命题.14.已知,满足,则_______________;15.已知,则_______.16.不论m取什么实数,点A(m+1,m2+2m-5)都在某函数图像上,若B(a,b)也是该函数图像上的点,则a2-b=_________.17.如果一次函数的图像与直线平行,且过点(-3,5),那么该一次函数解析式为__________.18.已知:直角三角形两直角边a,b满足a+b=17,ab=60,则此直角三角形斜边上的高为__________;三、解答题19.解方程组:(1)(2)20.计算:(1)(2)21.甲、乙两地相距300千米,一辆货车和一辆轿车先后从甲地出发向乙地,轿车必货车晚出发1.5小时,如图,线段OA表示货车离甲地的距离y(千米)与时间x(小时)之间的函数关系.请根据图象解答下列问题:(1)轿车到乙地时,求货车与甲地的距离;(2)求线段CD对应的函数表达式;(3)在轿车行进过程,轿车行驶多少时间,两车相距15千米.22.如图,在△ABC中,∠C=90°,将△ACE沿着AE折叠以后C点正好落在AB边上的点D处.(1)当∠B=28°时,求∠CAE的度数;(2)当AC=6,AB=10时,求线段DE的长.23.已知如图,一次函数y=ax+b图象经过点(1,2)、点(-1,6).求:(1)这个一次函数的解析式;(2)一次函数图象与两坐标轴围成的面积.24.如图1,在三角形ABC中,D是BC上一点,且∠CDA=∠CAB.(注:三角形内角和等于180°)(1)求证:∠CDA=∠DAB+∠DBA;(2)如图2,MN是经过点D的一条直线,若直线MN交AC边于点E,且∠CDE=∠CAD.求证:∠AED+∠EAB=180°;(3)将图2中的直线MN绕点D旋转,使它与射线AB交于点P(点P不与点A,B重合).在图3中画出直线MN,并用等式表示∠CAD,∠BDP,∠BPD这三个角之间的数量关系,不需证明.。

度山东省滕州市张汪中学周末拓展提高练习八年级物理(12月6日)

度山东省滕州市张汪中学周末拓展提高练习八年级物理(12月6日)

度山东省滕州市张汪中学周末拓展提高练习八年级物理(12月6日)八年级物理〔2021年12月6日〕一、选择题1.关于虚像和实像,以下判别正确的选项是A.平面镜成虚像,凸透镜成实像B.光的折射可以成实像也可以成虚像C.光的反射成实像,光的折射成虚像D.光的反射只能成实像2.以下光现象中,由于光的折射而构成的是A., B.,C., D.3.如下图,一束激光斜射进盛水的圆柱形敞口容器,观察到容器底部有一个光斑O,有能够使光斑向左移动的操作是A.坚持水面高度不变,向右平移激光笔B.坚持激光射入角度不变,使水面上升C.坚持激光射入角度不变,使水面下降D.坚持水面高度和入射点不变,增大入射角4.如下图,一束光线斜射入容器中,在P处构成一光斑,在向容器里逐渐加水直到加满的进程中,光斑P将〔〕A.渐渐向水面移动, B.渐渐向右移动后运动C.渐渐向左移动后运动, D.仍在原来位置5.〔题文〕射水鱼爱吃生活在水面外的小昆虫,它用射水的方法击中水面外的小昆虫,以下关于射水鱼看见水面上的昆虫的光路图正确的选项是〔〕A., B.,C., D.6.如下图,a、b、c是从空气射向水中的三条光线,OA是折射光线,那么OA的入射光线是A.a , B.b , C.c , D.无法判别7.一束光线由玻璃斜射入空气,假设入射角逐渐增大,折射角A.逐渐减小,且总大于入射角B.逐渐增大,且总大于入射角C.逐渐减小,且小于入射角D.逐渐增大,且总小于入射角8.如下图,光在玻璃或空气的界面MN同时发作了反射和折射,以下说法正确的选项是A.入射角为60°,界面右侧是空气, B.折射角为60°,界面右侧是玻璃C.入射角为30°,界面左侧是空气, D.折射角为60°,界面左侧是玻璃9.一平面镜与水平桌面成45°角固定在水平桌面上,如图,一乒乓球以3m/s的速度沿桌面向平面镜匀速滚来,那么小球在平面镜里像A.以3m/s的速度做竖直向上的运动, B.以3m/s的速度做竖直向下的运动C.以6m/s的速度做竖直向上的运动, D.以6m/s的速度做竖直向下的运动10.反射光线与镜面之间的夹角是60°,问平面镜使光的传达方向改动A.30°, B.60°C.120°, D.150°, 二、填空题11.两条光线经过透镜的管路如下图。

山东省滕州市张汪中学2020-2021学年度第一学期单元检测八年级物理第一章:机械运动(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期单元检测八年级物理第一章:机械运动(无答案)

山东省滕州市张汪中学2020-2021学年度第一学期单元检测八年级物理第一章:机械运动一、单选题1.小华用刻度尺测量铁块的长度(如图所示),方法正确的是()A.B.C.D.2.一物体从A地运动到B地,如果通过前二分之一路程时的平均速度是4m/s,通过后二分之一路程时的平均速度是6m/s,则整个行驶过程中的平均速度是()A.4 m/s B.4.8m/s C.5 m/s D.6m/s3.小明同学用最小刻度是毫米的刻度尺先后5次测量同一物体的长度,各次测量值分别为:2.42cm、2.43cm、2.42cm、2.44cm、2.64cm,你觉得这个物体的测量值应取A.2.42cm B.2.428cm C.2.43cm D.2.47cm4.小芳骑着自行车在上学的路上,若说她是静止的,则选择的参照物是A.旁边的树木B.迎面走来的行人C.从小芳身边超越的汽车D.小芳骑的自行车5.用刻度尺测物体的长度时,下列要求错误的是()A.测量时,刻度尺沿着所测长度放好B.测量时,必须从刻度尺的零刻度线处量起C.读数时,视线应与尺面垂直D.记录测量结果时,必须在数字后面写上单位6.甲、乙两同学使用各自的刻度尺按正确的方法测量同一张课桌的长度,并正确记录了测量结果,甲的记录是122.9cm,乙的记录是1.228m。

下列几种说法正确的是()A.甲的刻度尺分度值是1cm,乙的刻度尺分度值是1mmB.乙的读数更准确,因为他的小数位数更多C.甲、乙两同学测量的结果不一样,是因为测量存在误差D.如果甲、乙两同学使用更精密的测量工具,就不会出现误差,测量结果一定相同7.为测量某种液体的密度,小明利用天平和量杯测量了液体和量杯的总质量m及液体的体积V,得到了几组数据并绘出了m-V图象,如图所示,则该液体密度是()A.B.C.D.8.无风时,在雨中向东行驶的汽车中的人看到雨点运动的方向是()A.向下的B.向下偏东C.向下偏西D.无法确定9.某物体从地面上某一点出发沿直线运动,其st图像如图所示,得出物体运动的情况,结论不正确的是A.物体在6s内运动的路程为15mB.物体在6s内的平均速度为2.5m/sC.物体在前2s内和后2s内的速度相等D.以地球为参照物,物体在中间2s内静止10.一个物体做直线运动,全程50m,通过前一半路程用了4s,通过后一半路程用了6s,则该物体在全程中的平均速度为()A.10m/s B.6.25m/s C.5m/s D.4.17m/s11.甲、乙、丙三辆小车同时、同地向同一方向运动,它们运动的图象如图,下列说法正确的是()A.甲做加速直线运动,乙、丙做匀速直线运动B.甲、乙、丙三辆小车的速度大小关系是:v乙>v丙>v甲C.5s后跑到最前面的小车是甲D.甲和丙运动的速度相同12.最新发布的《中国居民膳食指南(2016)》中提倡“吃动平衡,天天运动”,建议每天行走6000步.陈老师喜爱环绕白云湖行走,通过手机软件测得四十分钟行走6000步,路程约4km.据此估计一个健康的成年人行走的平均速度和一步长度,下列选项中最合理的一项是()A.6km/h,65cm B.1.5km/h,1.2m C.6km/h,20cm D.15km/h,0.6m二、填空题13.如图所示,刻度尺的测量范围是_____cm,其分度值是_____cm,所测铅笔的长度为______cm。

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山东省滕州市张汪中学2020-2021学年度第一学期周末拓展提高练习
八年级物理(第7周)
一、单选题
1.下列关于声现象的说法中,正确的是
A.吹奏长笛时,笛声是由空气柱的振动产生的
B.声音的传播不需要介质,能在真空中传播
C.声音在空气中的传播速度大于在水中的传播速度
D.“震耳欲聋”主要描述声音的音调高
2.古典名著《三国演义》中,猛将张飞单枪立马在长坂坡当阳桥头,一声大喝,吓退十万曹操大军.这个
典故形容张飞声音
A.频率高B.音色差C.音调高D.响度大
3.下列的实验和实例,能说明声音的产生或传播条件的一组是
①在鼓面上放些碎纸屑,敲鼓时可观察到纸屑在不停地跳动;
②放在真空罩里的手机有来电时,只见指示灯闪烁,听不见铃声;
③拿一张硬纸片,让它在木梳齿上划过,一次快些,一次慢些,发现两次的声音不同;
④锣发声时用手按住锣,锣声立即消失了.
A.B.C.D.
4.疫情期间停课不停学,同学们在家收看“空中授课”时,以下有关声音的说法,正确的是()A.不同老师教学时说话声音音色不同
B.增大音量提高了声音音调
C.关上窗户可以防止外界噪声的产生
D.授课老师的声音不是由振动产生
5.如图所示,在空气均匀,且温度处处相同的室内,小明吹响长笛一个音,并用A、B两个相同设置的声音监测器在距小明不同距离的位置监测,得出如图的波形图,以下说法正确的是()
A.声音从监测器B处传播到监测器A处,频率减小
B.声音从监测器B处传播到监测器A处,响度减小
C.声音从监测器B处传播到监测器A处,音色改变
D.声音从监测器B处传播到监测器A处,声速改变
6.G60高速松江段,道路周边都安装了隔音挡板。

使用隔音挡板能够说明减弱噪声的方法是()A.在传播路径中减弱噪声B.在人耳处减弱噪声
C.在声源处减弱噪声D.在传播介质中减弱噪声
7.小明在淹城春秋民俗文化区游玩时,发现一种木制玩具青蛙刮鼓,用木棒在木制青蛙背上摩擦,就会发出类似青蛙的叫声,有时还能引起周围青蛙的附和共鸣,下列说法正确的是()
A.青蛙刮鼓发出的声音是由木棒振动产生的
B.模拟青蛙的叫声是指音色相近
C.能引起周围背蛙的附和共鸣说明声音能传递能量
D.青蛙刮鼓发出的声音一定是噪声
8.如图所示,敲击右边的音叉,观察到泡沫塑料球被弹开,这一现象不能说明()
A.发声的物体都在振动B.声音能够传递能量
C.声音能够传递信息D.空气能够传声
9.如图,超声波倒车雷达应用了大量的物理知识,不包括()
A.声音可以传递信息B.声音可以传递能量
C.声音可以被反射D.声音可在空气中传播
10.如图所示,甲、乙、丙、丁分别为声音的波形图,下列说法正确的是()
A.甲、乙两者的响度和音色均不同B.甲、丙两者的响度和音调相同
C.乙、丙两者的音调和响度均不同D.甲、丁两者的音调和音色相同。

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