第一周周末练习

第一周周末练习

1．为了了解一批电视机的使用寿命，从中抽取100台电视机进行试验，这个问题的样本

5．如图的两个统计图，女生人数多的学校是（）

这个问题中，总体是_________，样本是_________．

8．常用统计图的类型有：_________、_________、_________．

9．为了估计鱼塘中鱼的条数，养鱼者首先从鱼塘中打捞30条鱼做上标记，然后放归鱼塘，经过一段时间，等有标记的鱼完全混合于鱼群中，再打捞200条鱼，发现其中带标记的鱼有5条，则鱼塘中估计有_________条鱼．

10．根据预测，21世纪中叶我国劳动者构成比例绘制成扇形

统计图如图所示，则第一、二、三产业劳动者的构成比例

是_________：_________：_________．

11．在一个不透明的盒子中装有n个小球，它们只有颜色上

的区别，其中有2个红球，每次摸球前先将盒中的球摇匀，

随机摸出一个球记下颜色后再放回盒中，通过大量重复试验后发现，摸到红球的频率稳定于0.2，那么可以推算出n大约是_________．

12．某九年级制学校围绕“每天30分钟的大课间，你最喜欢的体育活动项目是什么？（只写一项）”的问题，对在校学生进行随机抽样调查，从而得到一组数据．图1是根据这组数据绘制的条形统计图，请结合统计图回答下列问题：

（1）该校对多少学生进行了抽样调查？

（2）本次抽样调查中，最喜欢篮球活动的有多少？占被调查人数的百分比是多少？

（3）若该校九年级共有200名学生，图2是根据各年级学生人数占全校学生总人数的百分比绘制的扇形统计图，请你估计全校学生中最喜欢跳绳活动的人数约为多少？

13．第15中学的九年级学生在社会实践中，调查了500位杭州市民某天早上出行上班所用的交通工具，结果用以下扇形统计图表示．

（1）请你将这个统计图改成用折线统计图表示的形式；

（2）请根据此项调查，对城市交通给政府提出一条建议．

量为轻微污染．

（1）如果要利用面积分别表示空气质量的优、良及轻微污染，那么这三类空气质量的面积之比为多少？

（2）估计该城市一年（以365天计）中有多少天空气质量达到良以上；

（3）保护环境人人有责，你能说出几种保护环境的好方法吗？

15．在我校“情系灾区，爱心相助”捐款活动中，某班50名学生捐款数如下(单位：元)： 19 20 25 30 28 27 26 21 20 22

24 23 25 29 27 88 27 30 l9 20

5 100 30 45 32 57 68 40 12 30

22 48 59 90 100 30 28 25 39 10

55 12 21 30 40 50 50 10 101 100

班主任老师准备将这组数据制成频数分布直方图，以表彰他们的爱心．制图时必须先计算出最大值与最小值的差_______；若取组距为10，则应分成_______组；若第一组的起点定为4.5，则在24.5～34.5范围内的频数______,请列出频数分布表并画出频数分布直方图.

16．要了解某地区八年级学生的身高情况从中随机抽取150名学生个身高作为一个样本，身高均在140cm～175cm之间（取整数厘米），整理后分成7组，会制频率分布直方图（不完整）．根据图中提供的信息，解答下列问题：

（1）补全频数分布直方图；

（2）抽取的样本中，学生的身高的中位数在那个小组？

（3）该地区共有3000名八年级学生，估计其中身高

不低于161cm的人数．

初中英语趣味阅读理解题4篇及答案[

Henry was an office worker in a big city. Henry was an office worker in a big city. He worked very hard and enjoyedtraveling in hisholidays. He usually went to the seaside, but one year he saw anadvertisement in a newspaper.“Enjoy country life. Spend a few weeks at West HillFarm. Good food. Fresh air. Horse riding.Walking. Fishing. Cheap and interesting.” “This sounds a good idea,” he thought. “I?ll spend a month at West Hill Farm.Ithink I canenjoy horse riding, walking and fishing. They?llmake a change from sittingby the seaside andswimming.” He wrote to the farmer. In the letter he said that hewould like to spend all of Julythere. Then on the first of July, he left for West HillFarm. But four days later, he returned home. “What was wrong with West Hill Farm?” his best friend, Ed, asked him.“Didn?tyou enjoycountry life?” “Country life was very good,” Henry said. “But there was another problem.”“Oh. What?” “Well,” he said, “the first day I was there a sheep died, and wehad roast muttonfor dinner.”“What's wrong with that?” Ed asked. “Fresh meat is the best.” “I know, but on the second day a cow died, and we had roast beef for dinner.”“Lucky you!” “You don't understand,” Henry said. “On the t hird day a pigdied and we hadroast pork fordinner.” “Let me finish,” Henry said. “On the fourth day the farmer died, and I didn'tdare (敢)stay fordinner!” 1.How did Henry find out about the farm? A. He saw it in a newspaper advertisement. B. His best friend told him.

【数学】2020年度苏教版二年级下册数学试卷-第1周周末作业

数学第1周周末作业 班级：姓名： 一、圈一圈，填一填 ☆☆☆☆☆☆☆☆☆☆☆☆☆ 13个☆，每3个一份，分成了（）份，还剩（）个。 13÷（）=（）……（）。 二、填空。 1．计算有余数的除法，余数要比除法（）。 2.19根小棒最多可以摆（）个小正方形，还剩（）根。 3.有31个乒乓球，要装在5个盒子里，每个盒子的个数一样多，每个盒子装（）个，还剩（）个。 4. 26÷□=6……2中，除数是（）。一个数除以7，余数最大是（）。 5. 在□÷□＝6……7中，除数最小是（），这时被除数是（）。 6.△÷5=8……★，被除数最大是（）。 7. □÷□=6......3 □÷□=6 (3) □÷3=6……□□÷3=6……□ □÷□=□......4 □÷□=□ (4) 8.（）最大能填几？（）×8＜36 65＞8×（） 9. □÷□＝□（盘）……□（个） □÷□＝□（个）……□（个） 10.有50个苹果，至少拿出（）个才能正好平均分给7个小朋友； 要再拿（）个才能正好分给8个小朋友。 11.○△△□○△△□○△△□……按这个规律画下去，第20个画（），这33个图形是（）。 三、选择题。(把正确答案的序号填在括号内。） 1.商是7的算式是( )。 ①7÷7 ②1×7 ③21÷3 ④42÷7 2.计算时用“七七四十九”这句口诀的算式有( )。 ①7+7 ②7-7 ③49÷7 ④49-7 3.余数是4的算式有( )。

①36÷8 ②10÷4 ③18-14 ④32÷7 4.16棵树，平均每行种3棵，可种几行，多几棵?( ) ①16-3 ②16÷3 ③16÷5 ④16+3 四、用竖式计算 26÷3= 41÷6= 30÷5= 75÷9= 五、解决问题。 1、舞蹈队有24个同学跳孔雀舞。 （1）如果排成5行，平均每行几个同学，还多几个？ （3）你能设计出一个排队方案，正好排完，没有多余的同学吗？ 2、每本练习本9角，小明用6元钱去买，最多可以买多少本？ 3、王老师带32名学生划船，每条船最多坐4人，他们需要租几条船？ 4、有一堆球，不管平均分给4个班还是5个班，都剩下3个球，这堆球最少有多少个？ 5、花圃里每排摆8盆花，一共摆了7排。 （1）一共有多少盆花？（2）如果每排摆9盆花，可以摆成几排，还剩几盆？ 6、一辆小汽车上有4个轮子和一个备用胎，现在有28个轮子，最多能装几辆这样的汽车？ 7.公园大门上，按“红、黄、蓝、绿、白、紫”的顺序从左往右挂了一排彩灯，一共有50盏，第25盏是什么颜色？最右边一盏是什么颜色?

心理活动课热身游戏

心理活动课热身游戏 1 无家可归 目的：让成员体会和感受个人与团体的关系，团体对个人的重要性，从而更愿意投入团体，增强团体的凝聚力。 时间：约20分钟。 准备：宽敞的场地。 操作：开始时让全体成员围圈手来手，充分体会大家在一起的感觉。然后，领导者说“变，4个人一组”，成员必须按照要求重新组成四人组，形成新的“家”，此刻，请那些没有找到家的人谈谈游离在团体之外的感受，大多会谈到“孤单、孤独、被抛弃、没依靠、失落、担心……”也可以请团体内的成员分享和大家在一起的感觉，大多会表达“温暖、有力量、安全、塌实……” 可以多次变换人数，让成员有机会去改变自己的行为，积极溶入团体，让成员体验有家的感觉，体验团体的支持，从而更加愿意与团体在一起。 2 信任圈 目的：增进彼此合作，建立信任感，培养团体气氛。

时间：大约25分钟。 准备：宽敞的场地，8-12人一组。 操作：每组围圈，邀请一位成员到中间，其他成员手拉手围圈。练习开始时，圈内人闭上眼睛，自觉舒适地导向任何一方，其他成员必须手挽手，形成保护圈给予保护，不能让圈内人摔倒。他往哪里倒，团体就往哪里去接住他，给予保护，将他推倒到中间的位置。如此倒下、接住，使中间的成员从紧张到很放松。可以换人到圈内去体验。活动充分体现团体的合作。 3 缩小包围圈 时间：5分钟，人数：不限 概述：这是一个不可能完成的任务，但是它会给游戏者带来无尽欢笑。 目的：使小组充满活力。创造融洽的气氛，为后续培训活动的开展奠定良好基础。让队员们能够自然地进行身体接触和配合，消除害羞和忸怩感。 步骤： 1．让队员们紧密地围成一圈，包括你自己。

2．让每个队员把自己的胳膊搭在相邻同伴的肩膀上。 3．告诉大家我们将要面临一项非常艰巨的任务。这项任务是大家要一起向着圆心迈3大步，同时要保持大家已经围好的圆圈不被破坏。 4．等大家都搞清楚了游戏要求之后，让大家一起开始迈第一步。迈完第一步后，给大家一些鼓励和表扬。5．现在开始迈第二步。第二步迈完之后，你可能就不必挖空心思去想那些表扬与鼓励的词语了，因为，目前的处境已经使大家忍俊不禁了。 6．迈第三步，其结果可能是圆圈断开，很多队员摔倒在地。尽管很难成功地完成任务，但是这项活动会使大家开怀大笑，烦恼尽消。 安全：在迈第三步的时候尤其要注意，不要让有些队员摔得过重。 1 大树与松鼠 说明：热身活动，让学员兴奋、紧张起来，具有一定的娱乐性。 活动方法： 1、事先分组，三人一组。二人扮大树，面对对方，伸出双手搭成一个圆圈；一人扮松鼠，并站在圆圈中间；辅导员或其它没成对的学员担任临时人员。 2、辅导员喊“松鼠”，大树不动，扮演“松鼠”的人就必须离开原来的大树，重新选择其它的大树；辅导员或临时人员就临时扮演松鼠并插到大树当中，落单的人应表演节目。

物理10月周末训练(一)

河科大附中周末物理强化训练（一） 班级_______ 小组 姓名___________ 【匀变速直线运动规律总结】 一、匀变速直线运动概念： (1)定义：沿着一条直线，且 不变的运动。 (2)分类：（限向单直线运动） ①匀加速直线运动，a 与v 0方向 。 ②匀减速直线运动，a 与v 0方向 。 二、匀变速直线运动图象： 知道V ——t 图象的特征、斜率及“面积”的物理意义 （能想象出x ——t 、a ——t 图象） (画出图象并说明) 三、匀变速直线运动基本公式： ①速度公式： ②位移公式： ③位移速度关系： 上述三个常用公式是表示匀变速直线运动规律的五个量：v 0 v a x t 中分别不含x v t 的方程式。试再推导出不含a v 0 的另外二个关系式 、 四、匀变速直线运动常用推论： 中时刻速度2 t v = 中位置速度 2 x v = 可以证明，无论匀加速还是匀减速，都有v 2 t ＜v 2 x 。尝试用代数及图象法证明 相邻相等的时间T 内位移增量为恒量 Δx ＝ ， 【应用】 例1： 做匀加速直线运动的物体8s 内，前4s 位移24m ，后4s 位移60m ，求加速度 【拓展应用】］x m －x n ＝(m －n )aT 2。 例2： 做匀加速直线运动的物体第3s 内位移5m ，第9s 位移8m ，求加速度及初速度 初速度为0，的匀变（加）速直线运动， ［v ——t 图象］ ①速度公式： ②位移公式： ③位移速度关系： 时间T 连续相等时 1T 、2T 、3T 、4T ┅┅末速度之比 v 1：v 2：v 3：v 4：┅┅= 前1T 、前2T 、前3T 、前4T ┅┅位移之比x 1：x 2：x 3：x 4：┅┅= 第1个T 、第2个T 、第3个T 、第4个T 、┅┅内位移之比： x Ⅰ：x Ⅱ：x Ⅲ：x Ⅳ：┅┅= [逆向思维应用] 例3：飞机着陆过程为匀减速，滑行距离为600m ，着陆过程中前一半时间滑行的距离为 初速度为0，的匀变（加）速直线运动，位移△x 连续相等 发生1△x 、2△x 、3△x 、4△x 所用时间之比t 1：t 2：t 3：t 4：┅┅= 发生1△x 、2△x 、3△x 、4△x 末速度之比v 1：v 2：v 3：v 4：┅┅= 发生第1个△x 、第2个△x 、第3个△x 、第4个△x 所用时间之比： t Ⅰ：t Ⅱ：t Ⅲ：t Ⅳ：┅┅= 例4：火车出站时为匀加速直线运动，某人在站台上第一节车厢前观察火车启动，测得第一节车厢通过的时间为t ，则第16节通过他所用的时间为

趣味阅读训练

新慧培训学校------英语阅读训练
https://www.wendangku.net/doc/0c17764547.html,
READ FOR FUN
编辑： Becky
QQ1255069821
I have a rabbit habit. I like to crunch and chew On celery logs and carrot sticks, And apple wedges, too. I have a rabbit habit. I like to chomp and munch On crispy greens and juicy grapes. Mmm…rabbit food for lunch! 1. What is a rabbit habit? _____________________________________________________________________ ______________________________________________________________________ 2. List four action verbs in this poem. __________________________ __________________________ __________________________ __________________________
The King of the Jungle
The lion is the king of the jungle. They are big and strong. Lions weigh 400 pounds and stand 4 feet tall. If you feel the hair on its face, it is soft. You can find a lion in Africa. They can live for 15 years in the wild. They like to sleep in the grass at night. Lions eat meat, such as zebras, giraffe, and buffalo. Lions live in groups, called “prides”, with about 15 other lions. Would you like to have a lion as a pet? 1. The lion is the King of the _______________. A) Jump Rope B) Africa C) Jungle D) Forest 2. Lions are big and strong. They weight _______ pounds. A) 4 B) 40 C) 400 D) 4000 3. Lions can live for _________ years in the wild. A) 5 B) 10 C) 15 D) 20 4. Lions eat meat, such as ___________________________. A) Pork Chops B) Hot Dogs, Hamburgers, and Chicken C) Plants D) Zebras, Giraffe, and Buffalo 5. Lions live in groups called ___________. A) Herds B) Prides C) Groups D) A Gaggle
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8道趣味思维训练题

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