必修三课后练习参考答案
高中英语(新人教版)必修第三册课后习题:UNIT 3 Section D(课后习题)【含答案及解析】
Section D Reading for Writing&AssessingYour Progress必备知识基础练Ⅰ.单词拼写1.Global warming refers to an average increase in the Earth’s temperature which leads to (气候) change.2.He is a (和善的) man,who is liked by all the people around him.3.Our company has produced a new kind of (材料) which remains stainless no matter what you will spill on it.4.It doesn’t matter what you wear,so long as you look (整洁的) and tidy.5.After they got the present job,the couple (定居) down in that country.6.The old teaching building has been pulled down and a new one is under (建造).7.This drink doesn’t (含有) any alcohol,so you can drink it if you drive a car.8.Each (物品) in the store has a bar code or a product number.Ⅱ.短语填空(注意动词的适当形式)1.Lots of our friends are coming:Anne,Ken and George,.2.He’s one of the few Westerners who have experienced the conditionsthere.3.The course is two parts:class time for learning traffic regulations and driving time to practice driving.4.The country over 100,000,most of whom are farmers.5.He handled the test sample ,because he was afraid of spoiling it.6.The research group produced two reports the survey,but neither contained any useful suggestions.Ⅲ.完成句子1.他躺在草地上,眼望天空。
人教版英语必修三课后练:Unit 5 Canada—“The True Section 1 课后 Word版含答案
Unit 5 Section ⅠⅠ.单句语法填空1.He managed to_survive(survive) the financial storm.解析:考查非谓语动词。
manage to do sth.设法做某事。
2.Please go aboard the ship quickly. There is only 10 minutes left.解析:考查动词短语。
句意:请快点上船,只剩下十分钟了。
go aboard上车/船/火车等。
3.As we all know,the government is taking measures(measure) to prevent the river from being polluted.解析:考查固定搭配。
句意:我们都知道,政府正采取措施阻止河流被污染。
take measures to do sth.采取措施做某事,为固定搭配。
4.He came all the way to China for learning it better rather than for making money.解析:考查固定搭配。
句意:他不远万里来到中国是为了更好地了解中国,而不是挣钱。
rather than而不是。
5.Surrounded(surround) by a group of children,the old man looked very happy.解析:考查非谓语动词。
句意:被一群孩子围着,老人看起来很幸福。
surround动词,与the old man之间为被动关系,故用过去分词形式作状语。
6.The country had been at war for a long time,but life there settled down finally.解析:考查动词短语。
句意:这个国家处于战争中已有很长一段时间,但是那里的生活终于安顿下来了。
新教材 人教版高中英语高中英语必修第三册 全册课后练习及单元测验 答案及解析
人教版必修第三册全册课时作业及单元检测Unit1 Festivals And Celebrations (2)1、Listening and Speaking Reading and Thinking (2)2、Discovering Useful Structures (6)3、Listening and Talking Reading for Writing (12)4、单元要点 (17)第一单元测验 (24)Unit2 Morals And Virtues (37)5、Listening and Speaking Reading and Thinking (37)6、Discovering Useful Structures (42)7、Listening and Talking Reading for Writing (48)8、单元要点 (54)第二单元测验 (62)Unit3 Divers Ecultures (75)9、Listening and Speaking Reading and Thinking (75)10、Discovering Useful Structures (80)11、Listening and Talking Reading for Writing (85)12、单元要点 (90)第三单元测验 (97)Unit4 Space Exploration (110)13、Listening and Speaking Reading and Thinking (110)14、Discovering Useful Structures (115)15、Listening and Talking Reading for Writing (121)16、单元要点 (126)第四单元测验 (133)Unit5 The Value Of Money (146)17、Listening and Speaking Reading and Thinking (146)18、Discovering Useful Structures (151)19、Listening and Talking Reading for Writing (158)20、单元要点 (163)第五单元测验 (171)Unit1 Festivals And Celebrations1、Listening and Speaking Reading and ThinkingⅠ.单词拼写1.About 200 people gathered (聚集) in front of the governor's office but police soon arrived and broke up the crowd.2.I will be grateful (感激的) if you could give me a kind consideration.3.He was trained based on his features (特点) and b ecame a topclass player.4.The blackboard was decorated (装饰) with beautiful words, which read “Happy Teachers' Day!”5.Fortunately, Europe has more to offer than lots of old churches (教堂) and ancient history.6.I think it is very significant (有重大意义的) to do voluntary work.7.He began to train the next generation with his typical (典型的) method.8.Those programs,ranging from talent or dating shows to reality shows,have received both commercial (商业的) success and public attention.9.What is important is not the story itself but what is reflected (反映) in the story.10.Most people hold the belief (信仰) that education can change one's fate.Ⅱ.单句语法填空1.I congratulate myself on having chosen a good woman to be my wife.2.A computer can gather a wide range of information for different purposes.3.Please add all the figures (figure) up, and you will get the total.4.At 8 am, we gathered (gather)at the foot of Daqing Mountain and set out for the top in high spirits.5.Tom has decorated his room with some photos of sports stars.6.Jack is late again. It is typical of him to keep others waiting.7.There is abundant evidence that a person's character is reflected (reflect) in his handwriting.8.Though it's only a small frustration (挫折), it made Rose lose faith in success.9.Go and get dressed (dress)! The school bus is waiting for you downstairs.10.Although they are good friends, they have little in common with each other.Ⅰ.阅读理解阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。
高中英语(新人教版)必修第三册课后习题:UNIT 5 Section A(课后习题)【含答案及解析】
UNIT5THE VALUE OF MONEYSection A Listening and Speaking必备知识基础练Ⅰ.单句填空1.Students’ performance will be judged the basis of degree examination results,theses and continuous assessment,following current university regulations.2.I owe you apology for what I said this morning.Anyhow I meant no offence.3.His (ignorance) behaviour at the dinner table caused much embarrassment.4.(judge) by the audience’s reactions,the show will be a great success.5.The family had to take a loan to pay the hospital bill that they can’t afford.6.He wanted to do something in return the kindness that she offered him.Ⅱ.短语填空(注意动词的适当形式)1.She gave us food and clothing and asked for nothing .2.He worked hard day and night so that they could .3.As we can see,they drew the conclusion experiments.4.It was my fault and my mother asked me to Mary the next day.5.They a club and sent out messages inviting everyone to come.Ⅲ.完成句子1.这是我第一次观看如此有趣的电影。
高中数学必修三《事件与概率》课后练习(含答案)
事件与概率课后练习题一:袋子中装有4个黑球和2个白球,这些球的形状、大小、质地等完全相同,在看不到球的条件下,随机地从袋子中摸出三个球,下列事件是必然事件的是(球的条件下,随机地从袋子中摸出三个球,下列事件是必然事件的是( )A .摸出的三个球中至少有一个球是黑球.摸出的三个球中至少有一个球是黑球B .摸出的三个球中至少有一个球是白球.摸出的三个球中至少有一个球是白球C .摸出的三个球中至少有两个球是黑球.摸出的三个球中至少有两个球是黑球D .摸出的三个球中至少有两个球是白球.摸出的三个球中至少有两个球是白球题二:下列事件中,必然事件是题二:下列事件中,必然事件是 ,不可能事件是,不可能事件是 ,随机事件是,随机事件是 .(1)某射击运动员射击1次,命中靶心;次,命中靶心;(2)从一只装着白球和黑球的袋中摸球,摸出红球;)从一只装着白球和黑球的袋中摸球,摸出红球;(3)13人中至少2个人的生日是同一个月;个人的生日是同一个月;(4)任意摸1张体育彩票会中奖;张体育彩票会中奖;(5)天上下雨,马路潮湿;)天上下雨,马路潮湿;(6)随意翻开一本有400页的书,正好翻到第100页;页;(7)你能长高到4m ;(8)抛掷1枚骰子得到的点数小于8.题三:一个射手进行一次射击,则事件“命中环数小于6环”的对立事件是(的对立事件是( )A .命中环数为7、8、9、10环B .命中环数为1、2、3、4、5、6环C .命中环数至少为6环D .命中环数至多为6环题四:某人连续投篮投3次,那么下列各组事件中是互斥且不对立的事件的组数为(次,那么下列各组事件中是互斥且不对立的事件的组数为( ) (1)事件A :至少有一个命中,事件B :都命中;:都命中;(2)事件A :至少有一次命中,事件B :至多有一次命中;:至多有一次命中;(3)事件A :恰有一次命中,事件B :恰有2次命中;次命中;(4)事件A :至少有一次命中,事件B :都没命中.:都没命中.A .0 B .1 C .2 D .3 题五:为了防控输入性甲型H1N1流感,某市医院成立隔离治疗发热流涕病人防控小组,决定从内科5位骨干医师中(含有甲)抽调3人组成,则甲一定抽调到防控小组的概率是人组成,则甲一定抽调到防控小组的概率是 .题六:小明将1枚质地均匀的硬币连续抛掷3次.次.(1)按3次抛掷结果出现的先后顺序,下列三种情况:次抛掷结果出现的先后顺序,下列三种情况:①正面朝上、正面朝上、正面朝上;①正面朝上、正面朝上、正面朝上;②正面朝上、反面朝上、反面朝上;②正面朝上、反面朝上、反面朝上;③正面朝上、反面朝上、正面朝上,③正面朝上、反面朝上、正面朝上,其中出现的概率(其中出现的概率( )A .①最小.①最小B .②最小.②最小C .③最小.③最小D .①②③均相同.①②③均相同(2)请用树状图说明:小明在3次抛掷中,硬币出现1次正面向上、2次反面向上的概率是多少多少题七:掷两个面上分别记有数字1至6的正方体玩具,设事件A 为“点数之和恰好为6”,则A 所有基本事件个数为(有基本事件个数为( )A .2个B .3个C .4个D .5个题八:从1,2,3,5中任取2个数字作为直线Ax +By =0中的A 、B .(1)求这个试验的基本事件总数;)求这个试验的基本事件总数;(2)写出“这条直线的斜率大于-1”这一事件所包含的基本事件.这一事件所包含的基本事件.题九:袋内装有红、白、黑球分别为3、2、1个,从中任取两个,则互斥而不对立的事件是( )A .至少一个白球;都是白球.至少一个白球;都是白球B .至少一个白球;至少一个黑球.至少一个白球;至少一个黑球C .至少一个白球;一个白球一个黑球.至少一个白球;一个白球一个黑球D .至少一个白球;红球、黑球各一个.至少一个白球;红球、黑球各一个题十:掷两颗相同的均匀骰子(各个面分别标有1,2,3,4,5,6),记录朝上一面的两个数,那么互斥而不对立的两个事件是(那么互斥而不对立的两个事件是( )A .“至少有一个奇数”与“都是奇数”B .“至少有一个奇数”与“至少有一个偶数”C .“至少有一个奇数”与“都是偶数”D .“恰好有一个奇数”与“恰好有两个奇数”题十一:下列说法中正确的是题十一:下列说法中正确的是 ..(1)事件A 、B 中至少有一个发生的概率一定比A 、B 中恰有一个发生的概率大;中恰有一个发生的概率大; (2)事件A 、B 同时发生的概率一定比A 、B 中恰有一个发生的概率小;中恰有一个发生的概率小;(3)互斥事件一定是对立事件,对立事件不一定是互斥事件;)互斥事件一定是对立事件,对立事件不一定是互斥事件;(4)互斥事件不一定是对立事件,对立事件一定是互斥事件.)互斥事件不一定是对立事件,对立事件一定是互斥事件.题十二:从一堆产品(其中正品与次品都多于2件)中任取2件,观察正品件数与次品件数,判断下列每件事件是不是互斥事件,如果是,再判断它们是不是对立事件.判断下列每件事件是不是互斥事件,如果是,再判断它们是不是对立事件.(1)恰好有1件次品和恰好有2件次品;件次品;(2)至少有1件次品和全是次品;件次品和全是次品;(3)至少有1件正品和至少有1件次品.件次品.题十三:经临床验证,一种新药对某种疾病的治愈率为49%,显效率28%,有效率12%,其余为无效.则某人患该病使用此药后无效的概率是余为无效.则某人患该病使用此药后无效的概率是 .题十四:我国西部一个地区的年降水量(题十四:我国西部一个地区的年降水量( 单位:mm )在下列区间内的概率如下表:)在下列区间内的概率如下表:年降水量水量[600,800) [800,1000) [1000,1200) [1200,1400) [1400,1600) 概率 0.12 0.26 0.38 0.16 0.08 (1)求年降水量在)求年降水量在事件与概率课后练习参考答案题一:题一: A .详解:必然事件就是一定发生的事件,随机事件是可能发生也可能不发生的事件.A 、是必然事件;B 、是随机事件,选项错误;C 、是随机事件,选项错误;、是随机事件,选项错误;D 、是随机事件,选项错误.故选A .题二:题二: (3)、(5)、(8);(2)、(7);(1)、(4)、(6). 详解:在一定条件下,可能发生也可能不发生的事件,称为随机事件.一定发生的事件称为必然事件;一定不发生的事件称为不可能事件.(1)某射击运动员射击1次,命中靶心;(随机事件)(随机事件)(2)从一只装着白球和黑球的袋中摸球,摸出红球;(不可能事件)(不可能事件)(3)13人中至少2个人的生日是同一个月;(必然事件)(必然事件)(4)任意摸1张体育彩票会中奖;(随机事件);(5)天上下雨,马路潮湿;(必然事件)(必然事件)(6)随意翻开一本有400页的书,正好翻到第100页;(随机事件);(7)你能长高到4m ;(不可能事件)(不可能事件)(8)抛掷1枚骰子得到的点数小于8.(必然事件).题三:题三: C .详解:根据对立事件的定义可得,一个射手进行一次射击,则事件“命中环数小于6环”的对立事件是:“命中环数至少为6环”,故选C .题四:题四: B .详解:利用互斥事件、对立事件的定义,即可得到结论.互斥事件:事件A 与事件B 不可能同时发生,强调的是“不同时发生”.对立事件:事件A 、B 中必定而且只有一个发生。
高中英语(新人教版)必修第三册课后习题:UNIT 4 Section B(课后习题)【含答案及解析】
Section B Reading and Thinking必备知识基础练Ⅰ.单句填空1.Babies are not born knowing the basic fact of universe.2.She (signal) a passing taxi and asked him to take her to the railway station.3.The professor was delighted to find that two thirds of the project had been finished by the students (independent).4.I handed out my resumes and went home feeling very (disappoint).5.While (intelligence) people can often simplify the complex,a fool is more likely to complicate the simple.6.Johnny broke away and ran outside,determined never (go) to another dance.7.Our feelings of well-being at any moment are (determine) to a certain degree by genes.8.He has improved greatly at piano playing after a year’s (far) study.9.Chang’e 4 has been sent (explore) the far side of the moon.10.It took him a long time (acquire) the skills he needed to become a good dancer.Ⅱ.短语填空(注意动词的适当形式)1.I come here knowing more about the accident from you.2.They the immigrant who lived upstairs alone and wanted to pay a visit to him.3.She looked around to that she was alone and then entered the nearby bar.4.A high percentage of the crime in this area drug abuse,so the police are taking measures to fight against drugs.5.Why not study at medical college like Lin Qiaozhi and your super work?6.,pay more attention to your health.7.Have the passengers been yet?The plane to Mexico is about to take off.8.We the news that he failed in the election of astronauts.9.It was important for me to my parents financially and mentally.10.She was lucky and entering a college to accept further study.Ⅲ.一句多译1.我们的校长总是每天第一个到达学校。
高中数学必修三课后习题答案
高中数学必修三课后习题答案第一章 算法初步 1.1算法与程序框图练习(P5) 1、算法步骤:第一步,给定一个正实数r .第二步,计算以r 为半径的圆的面积2S r π=.第三步,得到圆的面积S .2、算法步骤:第一步,给定一个大于1的正整数n .第二步,令1i =.第三步,用i 除n ,等到余数r .第四步,判断“0r =”是否成立. 若是,则i 是n 的因数;否则,i 不是n 的因数. 第五步,使i 的值增加1,仍用i 表示.第六步,判断“i n >”是否成立. 若是,则结束算法;否则,返回第三步.练习(P19)算法步骤:第一步,给定精确度d ,令1i =.的到小数点后第i 位的不足近似值,赋给a 的到小数点后第i 位的过剩近似值,赋给b . 第三步,计算55b am =-.第四步,若m d <,则得到5a;否则,将i 的值增加1,仍用i 表示.返回第二步. 第五步,输出5a.程序框图:习题1.1 A 组(P20)1、下面是关于城市居民生活用水收费的问题.为了加强居民的节水意识,某市制订了以下生活用水收费标准:每户每月用水未超过7 m 3时,每立方米收费1.0元,并加收0.2元的城市污水处理费;超过7m 3的部分,每立方收费1.5元,并加收0.4元的城市污水处理费.设某户每月用水量为x m 3,应交纳水费y 元,那么y 与x 之间的函数关系为 1.2,071.9 4.9,7x x y x x ≤≤⎧=⎨->⎩我们设计一个算法来求上述分段函数的值.算法步骤:第一步:输入用户每月用水量x .第二步:判断输入的x 是否不超过7. 若是,则计算 1.2y x =;若不是,则计算 1.9 4.9y x =-.第三步:输出用户应交纳的水费y .程序框图:2、算法步骤:第一步,令i =1,S=0.第二步:若i ≤100成立,则执行第三步;否则输出S. 第三步:计算S=S+i 2.第四步:i = i +1,返回第二步.程序框图:3、算法步骤:第一步,输入人数x ,设收取的卫生费为m 元.第二步:判断x 与3的大小. 若x >3,则费用为5(3) 1.2m x =+-⨯;若x ≤3,则费用为5m =.第三步:输出m .程序框图:B 组 1、算法步骤:第一步,输入111222,,,,,a b c a b c ..第二步:计算21121221b c b c x a b a b -=-.第三步:计算12211221a c a c y ab a b -=-.第四步:输出,x y .程序框图:INPUT “a ,b=”;a ,bsum=a+b diff=a -b pro=a*b quo=a/bPRINT sum ,diff ,pro ,quoEND2、算法步骤:第一步,令n =1第二步:输入一个成绩r ,判断r 与6.8的大小. 若r ≥6.8,则执行下一步;若r<6.8,则输出r ,并执行下一步.第三步:使n 的值增加1,仍用n 表示.第四步:判断n 与成绩个数9的大小. 若n ≤9,则返回第二步;若n >9,则结束算法.程序框图:说明:本题在循环结构的循环体中包含了一个条件结构.1.2基本算法语句 练习(P24) 1、程序:2、程序:3、程序:练习(P29) 1、程序:INPUT “a ,b ,c=”;a ,b ,cIF a+b>c AND a+c>b AND b+c>a THEN PRINT “Yes.” ELSEPRINT “No.” END IF INPUT “a ,b ,c=”;a ,b ,cp=(a+b+c)/2 s=SQR(p*(p -a) *(p -b) *(p -c)) PRINT “s=”;s END INPUT “F=”;F C=(F -32)*5/9 PRINT “C=”;C END4、程序: INPUT “a ,b ,c=”;a ,b ,csum=10.4*a+15.6*b+25.2*c PRINT “sum =”;sum END2、本程序的运行过程为:输入整数x . 若x 是满足9<x <100的两位整数,则先取出x 的十位,记作a ,再取出x 的个位,记作b ,把a ,b 调换位置,分别作两位数的个位数与十位数,然后输出新的两位数. 如输入25,则输出52. 34练习(P32) 1 2习题1.2 A 组(P33)1、1(0)0(0)1(0)x x y x x x -+<⎧⎪==⎨⎪+>⎩23、程序: 习题1.2 B 组(P33) 1、程序:23 41.3算法案例 练习(P45) 1、(1)45; (2)98; (3)24; (4)17. 2、2881.75.3、2200811111011000=() ,820083730=() 习题1.3 A 组(P48) 1、(1)57; (2)55. 2、21324.3、(1)104; (2)7212() (3)1278; (4)6315().4、习题1.3 B 组(P48)1、算法步骤:第一步,令45n =,1i =,0a =,0b =,0c =.第二步,输入()a i .第三步,判断是否0()60a i ≤<. 若是,则1a a =+,并执行第六步. 第四步,判断是否60()80a i ≤<. 若是,则1b b =+,并执行第六步. 第五步,判断是否80()100a i ≤≤. 若是,则1c c =+,并执行第六步. 第六步,1i i =+. 判断是否45i ≤. 若是,则返回第二步.2、如“出入相补”——计算面积的方法,“垛积术”——高阶等差数列的求和方法,等等. 第二章复习参考题A组(P50)1、(1)程序框图:程序:1、(2)程序框图:程序:2、见习题1.2 B组第1题解答.INPUT “x=”;x IF x<0 THENy=0ELSEIF x<1 THENy=1ELSEy=xEND IFEND IFPRINT “y=”;y ENDINPUT “x=”;x IF x<0 THENy=(x+2)^2 ELSEIF x=0 THENy=4ELSEy=(x-2)^2 END IFEND IFPRINT “y=”;y END34、程序框图:程序:INPUT “t=0”;t IF t<0 THEN PRINT “Please input again.”ELSE IF t>0 AND t<=180 THENy=0.2ELSEIF (t -180) MOD 60=0 THENy=0.2+0.1*(t-180)/60ELSEy=0.2+0.1*((t-180)\60+1)END IFEND IFPRINT “y=”;yEND IF END INPUT “n=”;n i=1 S=0WHILE i<=n S=S+1/i i=i+1 WENDPRINT “S=”;S END5、 (1)向下的运动共经过约199.805 m (2)第10次着地后反弹约0.098 m (3)全程共经过约299.609 m 第二章 复习参考题B 组(P35)1、 2、3、算法步骤:第一步,输入一个正整数x 和它的位数n . 第二步,判断n 是不是偶数,如果n 是偶数,令2n m =;如果n 是奇数,令12n m -=. 第三步,令1i =i=100 sum=0 k=1 WHILE k<=10 sum=sum+i i=i /2 k=k+1 WEND PRINT “(1)”;sum PRINT “(2)”;i PRINT “(3)”;2*sum -100 ENDINPUT “n=”;n IF n MOD 7=0 THEN PRINT “Sunday ” END IF IF n MOD 7=1 THEN PRINT “Monday ” END IF IF n MOD 7=2 THEN PRINT “Tuesday ” END IF IF n MOD 7=3 THEN PRINT “Wednesday ” END IF IF n MOD 7=4 THEN PRINT “Thursday ” END IF IF n MOD 7=5 THEN PRINT “Friday ” END IF IF n MOD 7=6 THEN PRINT “Saturday ” END IF END第四步,判断x 的第i 位与第(1)n i +-位上的数字是否相等. 若是,则使i 的值增加1,仍用i 表示;否则,x 不是回文数,结束算法.第五步,判断“i m >”是否成立. 若是,则n 是回文数,结束算法;否则,返回第四步.第二章 统计 2.1随机抽样 练习(P57)1、.况之间有误差. 如抽取的部分个体不能很好地代表总体,那么我们分析出的结果就会有偏差. 2、(1)抽签法:对高一年级全体学生450人进行编号,将学生的名字和对应的编号分别写在卡片上,并把450张卡片放入一个容器中,搅拌均匀后,每次不放回地从中抽取一张卡片,连续抽取50次,就得到参加这项活动的50名学生的编号. (2)随机数表法:第一步,先将450名学生编号,可以编为000,001, (449)第二步,在随机数表中任选一个数. 例如选出第7行第5列的数1(为了便于说明,下面摘取了附表的第6~10行).16 22 77 94 39 49 54 43 54 82 17 37 93 23 78 87 35 20 96 43 84 26 34 91 64 84 42 17 53 31 57 24 55 06 88 77 04 74 47 67 21 76 33 50 25 83 92 12 06 76 63 01 63 78 59 16 95 55 67 19 98 10 50 71 75 12 86 73 58 07 44 39 52 38 79 33 21 12 34 29 78 64 56 07 82 52 42 07 44 38 15 51 00 13 42 99 66 02 79 54 57 60 86 32 44 09 47 27 96 54 49 17 46 09 62 90 52 84 77 27 08 02 73 43 28第三步,从选定的数1开始向右读,得到一个三位数175,由于175<450,说明号码175在总体内,将它取出;继续向右读,得到331,由于331<450,说明号码331在总体内,将它取出;继续向右读,得到572,由于572>450,将它去掉. 按照这种方法继续向右读,依次下去,直到样本的50个号码全部取出,这样我们就得到了参加这项活动的50名学生. 3、用抽签法抽取样本的例子:为检查某班同学的学习情况,可用抽签法取出容量为5的样本. 用随机数表法抽取样本的例子:部分学生的心理调查等.抽签法能够保证总体中任何个体都以相同的机会被选到样本之中,因此保证了样本的代表性.4、与抽签法相比,随机数表法抽取样本的主要优点是节省人力、物力、财力和时间,缺点是所产生的样本不是真正的简单样本. 练习(P59)1、系统抽样的优点是:(1)简便易行;(2)当对总体结构有一定了解时,充分利用已有信息对总体中的个体进行排队后再抽样,可提高抽样调查;(3)当总体中的个体存在一种自然编号(如生产线上产品的质量控制)时,便于施行系统抽样法.系统抽样的缺点是:在不了解样本总体的情况下,所抽出的样本可能有一定的偏差. 2、(1)对这118名教师进行编号;(2)计算间隔1187.37516k==,由于k不是一个整数,我们从总体中随机剔除6个样本,再来进行系统抽样. 例如我们随机剔除了3,46,59,57,112,93这6名教师,然后再对剩余的112位教师进行编号,计算间隔7k=;(3)在1~7之间随机选取一个数字,例如选5,将5加上间隔7得到第2个个体编号12,再加7得到第3个个体编号19,依次进行下去,直到获取整个样本.3、由于身份证(18位)的倒数第二位表示性别,后三位是632的观众全部都是男性,所以这样获得的调查结果不能代表女性观众的意见,因此缺乏代表性.练习(P62)1、略2、这种说法有道理,因为一个好的抽样方法应该能够保证随着样本容量的增加,抽样调查结果会接近于普查的结果. 因此只要根据误差的要求取相应容量的样本进行调查,就可以节省人力、物力和财力.3、可以用分层抽样的方法进行抽样. 将麦田按照气候、土质、田间管理水平的不同而分成不同的层,然后按照各层麦田的面积比例及样本容量确定各层抽取的面积,再在各层中抽取个体(这里的个体是单位面积的一块地).习题2.1 A组(P63)1、产生随机样本的困难:(1)很难确定总体中所有个体的数目,例如调查对象是生产线上生产的产品.(2)成本高,要产生真正的简单随机样本,需要利用类似于抽签法中的抽签试验来产生非负整值随机数.(3)耗时多,产生非负整数值随机数和从总体中挑选出随机数所对的个体都需要时间.2、调查的总体是所有可能看电视的人群.学生A的设计方案考虑的人数是:上网而且登录某网址的人群,那些不能上网的人群,或者不登录某网址的人群就被排除在外了. 因此A方案抽取的样本的代表性差.学生B的设计方案考虑的人群是小区内的居民,有一定的片面性. 因此B方案抽取的样本的代表性差.学生C的设计方案考虑的人群是那些有电话的人群,也有一定的片面性. 因此C方案抽取的样本的代表性.所以,这三种调查方案都有一定的片面性,不能得到比较准确的收视率.3、(1)因为各个年级学习任务和学生年龄等因素的不同,影响各年级学生对学生活动的看法,所以按年级分层进行抽样调查,可以得到更有代表性的样本.(2)在抽样的过程中可能遇到的问题如敏感性问题:有些学生担心提出意见对自己不利;又如不响应问题:由于种种原因,有些学生不能发表意见;等等.(3)前面列举的两个问题都可能导致样本的统计推断结果的误差.(4)为解决敏感性问题,可以采用阅读与思考栏目“如何得到敏感性问题的诚实反应”中的方法设计调查问卷;为解决不响应问题,可以事先向全体学生宣传调查的意义,并安排专人负责发放和催收调查问卷,最大程度地回收有效调查问卷.4、将每一天看作一个个体,则总体由365天组成. 假设要抽取50个样本,将一年中的各天按先后次序编号为0~364天用简单随机抽样设计方案:制作365个号签,依次标上0~364. 将号签放到容器内充分搅拌均匀,从容器中任意不放回取出50个号签. 以签上的号码所对应的那些天构成样本,检测样本中所有个体的空气质量.用系统抽样设计抽样方案:先通过简单随机抽样方法从365天中随机抽出15天,再把剩下的350天重新按先后次序编号为0~349. 制作7个分别标有0~7的号签,放在容器中充分搅拌均匀. 从容器中任意取出一个号签,设取出的号签的编号为a,则编号为7(050)a k k +≤<所对应的那些天构成样本,检测样本中所有个体的空气质量.显然,系统抽样方案抽出的样本中个体在一年中排列的次序更规律,因此更好实施,更受方案的实施者欢迎.5、田径队运动员的总人数是564298+=(人),要得到28人的样本,占总体的比例为27.于是,应该在男运动员中随机抽取256167⨯=(人),在女运动员中随机抽取281612-=(人).这样我们就可以得到一个容量为28的样本.6、以10为分段间隔,首先在1~10的编号中,随机地选取一个编号,如6,那么这个获奖者奖品的编号是:6,16,26,36,46.7、说明:可以按年级分层抽样的方法设计方案. 习题2.1 B 组(P64)1、说明:可以按年级分层抽样的方法设计方案,调查问卷由学生所关心的问题组成. 例如:(1)你最喜欢哪一门课程? (2)你每月的零花钱平均是多少? (3)你最喜欢看《新闻联播》吗? (4)你每天早上几点起床? (5)你每天晚上几点睡觉?要根据统计的结果和具体的情况解释结论,主要从引起结论的可能原因及结论本身含义来解释.2、说明:这是一个开放性的题目,没有一个标准的答案. 2.2用样本估计总体 练习(P71) 1、说明:由于样本的极差为364.41362.51 1.90-=,取组距为0.19,将样本分为10组. 可以按照书上的方法制作频率分布表、频率分布直观图和频率折线图. 2、说明:此题目属于应用题,没有标准的答案.3、茎叶图为:由该图可以看出30名工人的日加工零件个数稳定在120件左右. 练习(P74)这里应该采用平均数来表示每一个国家项目的平均金额,因为它能反应所有项目的信息. 但平均数会受到极端数据2000万元的影响,所以大多数项目投资金额都和平均数相差比较大.练习(P79)1、甲乙两种水稻6年平均产量的平均数都是900,但甲的标准差约等于23.8,乙的标准差约等于41.6,所以甲的产量比较稳定.2、(1)平均重量496.86x ≈,标准差 6.55s ≈.(2)重量位于(,)x s x s -+之间有14袋白糖,所占的百分比约为66.67%.3、(1)略. (2)平均分19.25x ≈,中位数为15.2,标准差12.50s ≈.这些数据表明这些国家男性患该病的平均死亡率约为19.25,有一半国家的死亡率不超过15.2,15.2x >说明存在大的异常数据,值得关注. 这些异常数据使标准差增大. 习题2.2 A 组(P81) 1、(1)茎叶图为:(2)汞含量分布偏向于大于1.00 ppm 的方向,即多数鱼的汞含量分布在大于1.00 ppm 的区域. (3)不一定. 因为我们不知道各批鱼的汞含量分布是否都和这批鱼相同. 即使各批鱼的汞含量分布相同,上面的数据只能为这个分布作出估计,不能保证平均汞含量大于1.00 ppm. (4)样本平均数 1.08x ≈,样本标准差0.45s ≈.(5)有28条鱼的汞含量在平均数与2倍标准差的和(差)的范围内.2比较短,所以在这批棉花中混进了一些次品.3、说明:应该查阅一下这所大学的其他招生信息,例如平均数信息、最低录取分数线信息等. 尽管该校友的分数位于中位数之下,而中位数本身并不能提供更多录取分数分布的信息.在已知最低录取分数线的情况下,很容易做出判断;在已知平均数小于中位数很多,则说明最低录取分数线较低,可以推荐该校友报考这所大学,否则还要获取其他的信息(如标准差的信息)来做出判断. 4、说明:(1)对,从平均数的角度考虑; (2)对,从标准差的角度考虑;(3)对,从标准差的角度考虑; (4)对,从平均数和标准差的角度考虑; 5、(1)不能. 因为平均收入和最高收入相差太多,说明高收入的职工只占极少数. 现在已知知道至少有一个人的收入为50100x =万元,那么其他员工的收入之和为4913.55010075ii x==⨯-=∑(万元)每人平均只有1.53. 如果再有几个收入特别高者,那么初进公司的员工的收入将会很低. (2)不能,要看中位数是多少.(3)能,可以确定有75%的员工工资在1万元以上,其中25%的员工工资在3万元以上.(4)收入的中位数大约是2万. 因为有年收入100万这个极端值的影响,使得年平均收入比中位数高许多.6、甲机床的平均数=1.5x 甲,标准差=1.2845s 甲;乙机床的平均数 1.2z y =,标准差0.8718z s =. 比较发现乙机床的平均数小而且标准差也比较小,说明乙机床生产出的次品比甲机床少,而且更为稳定,所以乙机床的性能较好. 7、(1)总体平均数为199.75,总体标准差为95.26. (2)可以使用抓阄法进行抽样. 样本平均数和标准差的计算结果和抽取到的样本有关. (3) (4)略 习题2.2 B 组(P82)1、(1)由于测试1T 的标准差小,所以测试1T 结果更稳定,所以该测试做得更好一些. (2)由于2T 测出的值偏高,有利于增强队员的信心,所以应该选择测试2T .2、说明:此题需要在本节开始的时候就布置,先让学生分头收集数据,汇总所收集的数据才能完成题目.2.3变量间的相关关系 练习(P85)1、从已经掌握的知识来看,吸烟会损害身体的健康. 但除了吸烟之外,还有许多其他的随机因素影响身体健康,人体健康是很多因素共同作用的结果. 我们可以找到长寿的吸烟者,也更容易发现由于吸烟而引发的患病者,所以吸烟不一定引起健康问题. 但吸烟引起健康问题的可能性大,因此“健康问题不一定是由吸烟引起的,所以可以吸烟”的说法是不对的.2、从现在我们掌握的知识来看,没有发现根据说明“天鹅能够带来孩子”,完全可能存在既能吸引天鹅和又使婴儿出生率高的第3个因素(例如独特的环境因素),即天鹅与婴儿出生率之间没有直接的关系,因此“天鹅能够带来孩子”的结论不可靠.而要证实此结论是否可靠,可以通过试验来进行. 相同的环境下将居民随机地分为两组,一组居民和天鹅一起生活(比如家中都饲养天鹅),而另一组居民的附近不让天鹅活动,对比两组居民的出生率是否相同. 练习(P92)1、当0x =时,147.767y =,这个值与实际卖出的热饮杯数150不符,原因是:线性回归方程中的截距和斜率都是通过样本估计的,存在随机误差,这种误差可以导致预测结果的偏差;即使截距和斜率的估计没有误差,也不可能百分之百地保证对应于x ,预报值y 能够等于实际值y . 事实上:y bx a e =++. (这里e 是随机变量,是引起预报值y 与真实值(1)散点图如下: y 之间的误差的原因之一,其大小取决于e 的方差.)2、数据的散点图为:从这个散点图中可以看出,鸟的种类数与海拔高度应该为正相关(事实上相关系数为0.793). 但是从散点图的分布特点来看,它们之间的线性相关性不强. 习题2.3 A 组(P94)1、教师的水平与学生的学习成绩呈正相关关系. 又如,“水涨船高”“登高望远”等.2、(3)基本成正相关关系,即食品所含热量越高,口味越好.(4)因为当回归直线上方的食品与下方的食品所含热量相同时,其口味更好. 3、(1)散点图如下:(2)回归方程为:0.66954.933y x =+.(2)回归直线如下图所示:(3)加工零件的个数与所花费的时间呈正线性相关关系. 4、(1)散点图为:(2)回归方程为:0.546876.425y x =+.(3)由回归方程知,城镇居民的消费水平和工资收入之间呈正线性相关关系,即工资收入水平越高,城镇居民的消费水平越高. 习题2.3 B 组(P95) 1、(1)散点图如下:(2)回归方程为: 1.44715.843y x =-.(3)如果这座城市居民的年收入达到40亿元,估计这种商品的销售额为42.037y ≈(万元). 2、说明:本题是一个讨论题,按照教科书中的方法逐步展开即可.第二章 复习参考题A 组(P100)1、A .2、(1)该组的数据个数,该组的频数除以全体数据总数; (2)nmN. 3、(1)这个结果只能说明A 城市中光顾这家服务连锁店的人比其他人较少倾向于选择咖啡色,因为光顾连锁店的人使一种方便样本,不能代表A 城市其他人群的想法. (2)这两种调查的差异是由样本的代表性所引起的. 因为A 城市的调查结果来自于该市光顾这家服装连锁店的人群,这个样本不能很好地代表全国民众的观点.4、说明:这是一个敏感性问题,可以模仿阅读与思考栏目“如何得到敏感性问题的诚实反应”来设计提问方法.5、表略. 可以估计出句子中所含单词的分布,以及与该分布有关的数字特征,如平均数、标准差等.6、(1)可以用样本标准差来度量每一组成员的相似性,样本标准差越小,相似程度越高. (2)A 组的样本标准差为 3.730A S ≈,B 组的样本标准差为11.789B S ≈. 由于专业裁判给分更符合专业规则,相似程度应该高,因此A 组更像是由专业人士组成的.7、(1)中位数为182.5,平均数为217.1875.(2)这两种数字特征不同的主要原因是,430比其他的数据大得多,应该查找430是否由某种错误而产生的. 如果这个大数据的采集正确,用平均数更合适,因为它利用了所有数据的信息;如果这个大数据的采集不正确,用中位数更合适,因为它不受极端值的影响,稳定性好. 8、(1)略.(2)系数0.42是回归直线的斜率,意味着:对于农村考生,每年的入学率平均增长0.42%.(3)城市的大学入学率年增长最快. 说明:(4)可以模仿(1)(2)(3)的方法分析数据.第二章 复习参考题B 组(P101)1、频率分布如下表:从表中看出当把指标定为17.46千元 时,月65%的推销员 经过努力才能完成销 售指标.2、(1)数据的散点图如下:(2)用y 表示身高,x 表示年龄,则数据的回归方程为 6.31771.984y x =+. (3)在该例中,斜率6.317表示孩子在一年中增加的高度.(4)每年身高的增长数略. 3~16岁的身高年均增长约为6.323 cm. (5)斜率与每年平均增长的身高之间之间近似相等.第三章 概率3.1随机事件的概率 练习(P113) 1、(1)试验可能出现的结果有3个,两个均为正面、一个正面一个反面、两个均为反面. (2)通过与其他同学的结果汇总,可以发现出现一个正面一个反面的次数最多,大约在50次左右,两个均为正面的次数和两个均为反面的次数在25次左右. 由此可以估计出现一个正面一个反面的概率为0.50,出现两个均为正面的概率和两个均为反面的概率均为0.25. 2、略 3、(1)例如:北京四月飞雪;某人花两元钱买福利彩票,中了特等奖;同时抛10枚硬币,10枚都正面朝上.(2)例如:在王府井大街问路时,碰到会说中文的人;去烤鸭店吃饭的顾客点烤鸭;在1~1000的自然数任选一个数,选到的数大于1. 练习(P118)1、说明:例如,计算机键盘上各键盘的安排,公交线路及其各站点的安排,抽奖活动中各奖项的安排等,其中都用到了概率. 学生可能举出各种各样的例子,关键是引导他们正确分析例子中蕴涵的概率思想.2、通过掷硬币或抽签的方法,决定谁先发球,这两种方法都是公平的. 而猜拳的方法不太公平,因为出拳有时间差,个人反应也不一样.3、这种说法是错误的. 因为掷骰子一次得到2是一个随机事件,在一次试验中它可能发生也可能不发生. 掷6次骰子就是做6次试验,每次试验的结果都是随机的,可能出现2也可能不出现2,所以6次试验中有可能一次2都不出现,也可能出现1次,2次,…,6次. 练习(P121)1、0.72、0.6153、0.44、D5、B 习题3.1 A 组(P123) 1、D . 2、(1)0; (2)0.2; (3)1.3、(1)430.067645≈; (2)900.140645≈; (3)7010.891645-≈.4、略5、0.136、说明:本题是想通过试验的方法,得到这种摸球游戏对先摸者和后摸者是公平的结论. 最好把全班同学的结果汇总,根据两个事件出现的频率比较近,猜测在第一种情况下摸到红球的概率为110,在第二种下也为110. 第4次摸到红球的频率与第1次摸到红球的频率应该相差不远,因为不论哪种情况,第4次和第1次摸到红球的概率都是1 10.习题3.1 B组(P124)1、D.2、略. 说明:本题是为了学生根据实际数据作出一些推断. 一般我们假定每个人的生日在12个月中哪一个月是等可能的,这个假定是否成立,引导学生通过收集的数据作出初步的推断.3.2古典概率练习(P130)1、110. 2、17. 3、16.练习(P133)1、38,38.2、(1)113;(2)1213;(3)14;(4)313;(5)0;(6)213;(7)12;(8)1.说明:模拟的方法有两种.(1)把1~52个自然数分别与每张牌对应,再用计算机做模拟试验.(2)让计算机分两次产生两个随机数,第一次产生1~4的随机数,代表4个花色;第二次产生1~13的随机数,代表牌号.3、(1)不可能事件,概率为0;(2)随机事件,概率为49;(3)必然事件,概率为1;(4)让计算机产生1~9的随机数,1~4代表白球,5~9代表黑球.4、(1)16;(2)略;(3)应该相差不大,但会有差异. 存在差异的主要原因是随机事件在每次试验中是否发生是随机的,但在200次试验中,该事件发生的次数又是有规律的,所以一般情况下所得的频率与概率相差不大.习题3.2 A组(P133)1、游戏1:取红球与取白球的概率都为12,因此规则是公平的.游戏2:取两球同色的概率为13,异色的概率为23,因此规则是不公平的.游戏3:取两球同色的概率为12,异色的概率为12,因此规则是公平的.2、第一位可以是1~9这9个数字中的一个,第二位可以是0~9这10个数字中的一个,所以(1)190;(2)18919090-=;(3)9919010-=3、(1)0.52;(2)0.18.4、(1)12;(2)16;(3)56;(4)16.5、(1)25;(2)825.6、(1)920;(2)920;(3)12.习题3.2 B组(P134)1、(1)13;(2)14.2、(1)35;(2)310;(3)910.说明:(3)先计算该事件的对立事件发生的概率会比较简单.3、具体步骤如下:①建立概率模型. 首先要模拟每个人的出生月份,可用1,2,…,11,12表示月份,用产生取整数值的随机数的办法,随机产生1~12之间的随机数. 由于模拟的对象是一个有10个人的集体,故把连续产生的10个随机数作为一组模拟结果,可模拟产生100组这样的结果.②进行模拟试验. 可用计算器或计算机进行模拟试验.如使用Excel软件,可参看教科书125页的步骤,下图是模拟的结果:其中,A,B,C,D,E,F,G,H,I,J的每一行表示对一个10人集体的模拟结果. 这样的试验一共做了100次,所以共有100行,表示随机抽取了100个集体.③统计试验的结果. K,L,M,N列表示统计结果. 例如,第一行前十列中至少有两个数相同,表示这个集体中至少有两个人的生日在同一月. 本题的难点是统计每一行前十列中至少有两个数相同的个数. 由于需要判断的条件态度,所以用K,L,M三列分三次完成统计.其中K列的公式为“=IF(OR(A1=B1,A1=C1,A1=D1,A1=E1,A1=F1,A1=G1,A1=H1,A1=I1,A1=J1,B1=C1,B1=D1,B1=E1,B1=F1,B1=G1,B1=H1,B1=I1,B1=J1,C1=D1,C1=E1,C1=F1,C1=G1,C1=H1,C1=I1,C1=J1,D1=E1,D1=F1,D1=G1,D1=H1,D1=I1,D1=J1),1,0)”,L列的公式为“=IF(OR(E1=F1,E1=G1,E1=H1,E1=I1,E1=J1,F1=G1,F1=H1,F1=I1,F1=J1,G1=H1,G1=I1,G1=J1,H1=I1,H1=J1,I1=J1),1,0)”,M列的公式为“=IF(OR(K1=1,L1=1),1,0)”,M列的值为1表示该行所代表的10人集体中至少有两个人的生日在同一个月. N1表示100个10人集体中至少有两个人的生日在同一个月的个数,其公式为“=SUM(M$1:M$100)”. N1除以100所得的结果0.98,就是用模拟方法计算10人集体中至少有两个人的生日在同一个月的概率的估计值. 可以看出,这个估计值很接近1.3.3几何概率。
高中数学必修3课后习题答案 精品优选公开课件
二是功利境界。有些人,会为了利己而主动去思考和做事,虽然未必不道德,却必定是功利的,而且很容易走向自私自利、损人利己。 三是道德境界。有的人,已经超越了自身,而开始考虑利人,譬如为了道义、公益、众生福祉而去做事。他们的眼界已经超越自身而投向了世间,胸中气象和站立高度已经抵达精神层次。 四是天地境界。当一个人的视野放到了整个天地宇宙,目光投向了万物根本,他就抵达了天人合一。这时他就已经不需要动脑子了,因为天地宇宙就是他的脑子,已经事事洞明,就像电脑连接到了互联网。这种境界,正是道家境界。这四重境界,境界越高就越想得开。想开到什么程度,则决定于人的视野放到多大,眼界拔到多高。人处平地,到处都会遮眼阻路;人登顶峰,世间便能一览通途。这就是想得开的秘密——眼界大了,心就宽了;站得高了,事就小了。想不开,往往都是画地为牢、作茧自缚。
眼光和思维所涉及的面,尽量往大了走、往高了去,则是人人可以努力靠近的。 综上:儒家拿得起、佛家放得下、道家想得开,合起来其实就是一句话:带着佛家的出世心态,凭着道家的超世眼界,去做儒家入世的事业。这也正是南怀瑾所说的人生最高境界:佛为心,道为骨,儒为表,大度看世界。车水马龙的闹市里,双眸里闪烁着都市的霓虹,衣服上沾满着汽车 曾经有一个人,她永远占据在你心最柔软的地方,你愿用自己的一生去爱她,这个人,叫“母亲”;有一种爱,它可以让你随意的索取、享用,却不要你任何的回报,不会向你抱怨,总是自己一个人默默地承受着这一切。这种爱,叫“母爱”!
高中英语(新人教版)必修第三册课后习题:UNIT 3 Section C(课后习题)【含答案及解析】
Section C Discovering Useful Structures&Listening and Talking必备知识基础练Ⅰ.单句填空1.Tokyo and New York are major (finance) centres.2.There are hundreds of (poison) spiders and snakes.3.You are invited to view our autumn (collect).4.John turned his head away with his arms (fold) over his chest.5.There seems to be something wrong with the engine.If ,we’d better have it repaired.6.Through the course of my schooling,I met many teachers,two of influenced me greatly.7.Henry looked about as if in search something.8.Nothing can stop the boy from playing video games when he wants .Ⅱ.完成句子1.I (试图站起来),but I was completely exhausted and had to give up.2.There seems to be something wrong with my phone.(如果那样的话),I have to have it repaired.3.Proper amounts of exercise,(如果被执行) regularly,can improve our health.4.Life in the twenty-first century is much easier than it (过去).5.There was total agreement to start the peace process(尽快).6.It is said that the printer has (遗漏) two lines from this paragraph.7.Geographically,this town (位于) the southern part of the country.8.We have to get everything arranged(秩序井然) before the guests come.Ⅲ.语法专练(变为省略句)1.If it is possible,I’m going to visit some homes for the old in the city.,I’m going to visit some homes for the old in the city.2.The workers are not to blame because they carried out the plan as they were told.The workers are not to blame because they carried out the plan.3.Why don’t we go to Hainan for our holiday this summer?to Hainan for our holiday this summer?4.The little boy wanted to play football in the street,but his mother told him not to play there.The little boy wanted to play football in the street,but hismother.5.The man was lying on the ground as if he was seriously injured.The man was lying on the ground as if .6.Experience is not what you have done;it is what you have learned while you are doing it! Experience is not what you have done;it is what you have learned!7.Once it is heated,the amber can be made into any shape.,the amber can be made into any shape.8.He rubbed his eyes as though he was waking up from a long sleep.He rubbed his eyes as though from a long sleep.关键能力提升练Ⅳ.完形填空(2020·江苏昆山中学高一期中)Cities are a world of convenience.In cities,people have access to a large number of 1.Public transportation,well-equipped hospitals and social services 2 comfortable living.But services don’t make up for the fact that big cities are often lonely,impersonal places.People can easily 3 themselves from others.Creating a sense of community,then,becomes urgent (紧急的).Some psychologists say that community art — art that is made to be shown free of charge in a particular community—can make a big 4.Unlike the random (随意的) graffiti (涂鸦) that many people 5 an unpleasant thing,community art can bring people together and encourage respect.In the U.S.city of Philadelphia,6,psychologists are doing a citywide project where mental health patients work with average people to paint murals (壁画).The aim of this project is to reduce the negative effects of 7 illness and promote a new dialogue between people who 8 these issues.Art also makes neighborhoods more attractive and has a(an) 9 ability to open peopleup.Neighbors can share comments on a recently painted mural which can 10 their prejudice (偏见) and open their eyes to the world.11 can also be improved by community art.In Fort Smith,a town in the U.S.state of Arkansas,artists from around the globe came together to paint murals.One of the goals of the project was to expand the town’s cultural offerings in order to 12 more visitors.Not only locals but also tourists were drawn to see the murals.The money they spent while visiting the town 13 local businesses.“I Love your neighbor” is a(an) 14 job for everyone.But if a little extra color can make cities warmer,more welcoming places,then let’s take some 15 and get to work.【语篇解读】本文是一篇说明文。
高中英语必修三课后习题:Unit 5 Canada — “The True North”5.1含解析
Section Ⅰ— Warming Up,Pre-reading,Reading & Comprehending课后篇巩固探究一、用方框内所给短语的适当形式填空(有多余选项)rather than settle down manage to catch sight of have a gift for take measures to surrounded with1.My house is a lot of high trees,so we feel cool even during hot答案:surrounded with2.It is said that children generally pay attention to other children’s strengths答案:rather than3.The Greens have an eight-year-old girl who painting.She答案:has a gift for4.When the girl her classmates,she stood up and waved to答案:caught sight of5.After hearing the good news,she was so excited that it took her some time to .答案:settle down.Hearing the sound,the children were (terrify) out of their senses.答案:terrified.He became (wealth) through hard work and careful saving.答案:wealthy.His collection of paintings is the most (impress).答案:impressive.I am very (please) with the quality of your work.答案:pleased.Do you like (tradition) Chinese art using brush and ink?答案:traditional.You are only (slight) underweight for your height.答案:slightly.We could just see the outline of the house through the (misty).答案:mist’s water comes from the (surround) hills.答案:surrounding导学号192940251.My sister preferred to sleep at home rather go for a picnic with her friends.2.After travelling to many places,the old man finally decided to settle in a quiet3.Although the fire was fierce and spread quickly,the firefighters managed4.—Must I go to the railway station by taxi?’t.It’s very near,walking distance of the hotel.5.When the patient came to life,he found himself (surround) by a group oflove and friendship.7.The faces of four famous American presidents on Mount Rushmore can be seen from8.It is our Chinese tradition elders to give children lucky money in red paper as a gift9.News came from the principal Wang Peng had been admitted to Qinghua.Mary,as well as her two friends,(invite) to the party last night.AIn Canada and the United States,there is a new group of children called “satellite kids”,who live in one place but whose parents live in another place.Asians are immigrating to Canada and the United States in larger numbers than ever before.Most Asians immigrate because they believe that they can give their children a better education in the West.In Asia,especially in China and Japan,it is difficult to go to university.Students must first pass the strict national examination.However,in Canada and the United States,it is easy to go to university,and anyone who wants to go can go.As a result,Asian parents decide to leave their countries so that their children can go to university.The problem is that when Asians arrive,they discover that finding a job and making money are more difficult in the West than in the East.Also,they find that they are very lonely,and that they miss their homes.Because of these two reasons,most Asian parents decide to go back to work while their children study in the West.Therefore,these children become “satellite kids”,and most of their parents do not know how sad it is to be a “satellite kid”.Only until now are Canadians and Americans discovering the “satellite kid” problem.Because these children do not speak English and because their parents are not there to take care of them.They are often absent from school.To be a “satellite kid”means growing up in a countrywhere you know you are different and where you cannot make friends because you do not speak English well.Also,it means growing up lonely,because your parents are elsewhere.What these “satellite kids” will probably say to their parents is that it’s better to have parents around than to have a university education.1.Some Asian parents send their kids abroad because .A.they hope their children may easily find a job thereB.the kids may not be accepted by universities in their own countriesC.all foreign universities are better than the ones in their own countries“As a result,Asian parents decide to leave their countries so that their children can go to university.”可知,B项正确。
高中英语(新人教版)必修第三册课后习题:UNIT 1 Section A(课后习题)【含答案及解析】
UNIT1FESTIVALS AND CELEBRATIONS Section A Listening and Speaking必备知识基础练Ⅰ.单句填空1.This was a very impressive (perform) by the young player,who scored 14 points within the first ten minutes.2.He congratulated himself having made a narrow escape from death.3.The title will be officially given to me a ceremony in London.4.The boy (dress) in a white coat and carrying lanterns is my brother.5.Don’t blame him for breaking that vase;all he is a child.Ⅱ.短语填空(注意动词的适当形式)1.The school kids as monkeys for the festival yesterday.2.Why not give her another chance? ,she is only a girl of fifteen.3.All the teachers are required to the opening ceremony tomorrow.4.After I went to college,I my friends all over the world.5.My favorite singer will at the Workers’ Stadium next week.6.He studied people, what they did and why they did it.7.We went to Quancheng Park last Sunday and we really .Ⅲ.完成句子1.你最好注意老师在课上所说的话。
高中英语必修三课后习题:Unit3TheMillionPoundBankNote3.3含解析
Section Ⅲ— Grammar课后篇稳固研究一、用适合的连结词或所给动词的适合形式填空1.My suggestion is that you(apologize)to your mother.答案 :(should)apologize2.He worked on the plan for almost a month but couldn ’ t see any progress.That’ s he(lose)his patience.答案 :why;lost3.I am very interested in he(earn)his passage in such a short time.答案 :how;earned4.We are glad so many old friends(attend)our party tomorrow.答案 :that;will attend5.I want to know you can repair the computer or not.答案 :whether6.Do you know hat it is?答案 :whose7.Please tell me you(wait)for.答案 :whom;are/were waiting8.Is that yellow envelope you are seeking for?答案 :what9.Would you please tell me the embassy is?答案 :where10.The problem is that I(be)short of money at that time.答案 :was二、单句填空1.After ten years,she changed a lot and looked different from she used to be.答案 :what2.Everything depends on they will support you about it.答案 :whether3.You can’ t imagine terrible weather we had.答案 :what4.— I lost my cellphone yesterday.Can you tell me I can buy one?—Well,there is a department store just around the corner.答案 :where5.He insisted that he(not break)the law and that he (set)free.答案 :hadn’t broken;(should)be set三、达成句子1.No one in the office knew(她为何如今生气).答案 :why she was so angry2.From space,the earth looks blue.This is(由于它的表面的大概71%被水覆盖 ).答案 :because about 71 percent of its surface is covered by water3.We haven’t discussed(我们将把这些旧书放在哪儿 ).答案 :where we will put/place these old books4.Do you know(汤姆什么时候去北京)?答案 :when Tom will go to Beijing5.Our success will depend on(她能否愿意加入我们 ).答案 :whether she would like to join us四、完形填空导学号 19294016There is an Indian story about a bar of candy that came to see God in Heaven.He 1 :“Dear God,I am so sweet.I am so2!I keep the Five Precepts( 戒律 ) . ”The sugar candy,as you know,always3on the table doing nothing.He says he never does4to anyone. “But anyone,even the ants,the flies— anyone who comes5me wants to eat me.Why?What have I done?Doesn’ t the law6anymore?”Because God says that if you 7 something bad,if you harm someone,if you are sour,then people will8sourness(坏心眼 )to you.But if you are9to people,if you are nice and you don’ t do any harm to people,then they will10harm you,right?So the candy said, “Why me?I am a candy.I am so sweet,but people always11me and abuse me,why?”And God said, “You’ d better12 a little bit further before I answer you. ”And the candy said, “Why,you don ’ t13me?”So God said, “Just do it!Stand away,please! ”He’ s nearly lost his14.Oh,he’ s shouted very hard,very loud.And the sugar was 15,thinking that God didn ’ t like him and got16with him.He said,“M-m-m-y G-g-god,but what did I do? ” 17 ,God said, “You didn ’t do anything,but if you stay too near,Iwill also want to eat you! ”Everything in this world has a18of its own.Some are charming,some are19 ,like the candy,chocolate,the cakes,and some 20everything,like fire,as soon as you get near.plainedC.reportedD.ordered答案 :B分析 :由下文糖果所说内容可知,它是在诉苦他人对它的不公正,所以应用complained。
高中英语(新人教版)必修第三册课后习题:UNIT 4 Section A(课后习题)【含答案及解析】
UNIT4SPACE EXPLORATIONSection A Listening and Speaking必备知识基础练Ⅰ.单句填空1.It is very important for astronauts to learn to use space (equip).2.That young man with right weight is fit for this job height.3.This job is offered to those with a (relate) college degree.4.It is said that exercise is good to (mentally) development.5.The little boy looked at the astronaut with (curious).6.Susan is a woman high intelligence who knows her own mind.Ⅱ.短语填空(注意动词的适当形式)1.Now everything is very expensive.You’d better things to buy before you go shopping.2.She everything when she was on her first journey.3.Anyone must be suitable and in weight before he or she becomes an astronaut.4.To their delight,their son has this famous university.5.Reading English aloud in the morning helps practise your oral English helps strengthen your memory.6.I have stayed longer,but I had to leave.7.If you want to be a professional footballer,you must football as required.8.,you’d better know clearly what you want to be before you choose your major.Ⅲ.完成句子1.对我来说这道数学题不容易计算出来。
高中英语(新人教版)必修第三册课后习题:UNIT 4 Section C(课后习题)【含答案及解析】
Section C Discovering Useful Structures&Listening and Talking必备知识基础练Ⅰ.单句填空1.They are determined (recycle) their garbage because they care about the environment.2.The research (lack) solid evidence,and therefore,its conclusions are doubtful.3.Can you tell the pupils why ships are able (float) on the sea?4.I haven’t seen Sara since she was a little girl,and she has changed recognition.5.Only when agriculture is fully developed can industry have (sufficiency) materials and markets.6.Mankind has always been keen exploring and learning more about the world we live in.7.Do you know who is the first person that got (marry) in space?8.Astronauts’ bones and muscles can get very weak due the lack of gravity.9.As we know, (send) people to other planets is not an easy task.10.Though they met with a lot of difficulties on the way,they didn’t give .Ⅱ.短语填空(注意动词的适当形式)1.Have you why she didn’t invite you to her birthday party?2.The old farmer seeds from across Europe,the Middle East and Asia.3.Doctors examine their patients thoroughly make a correct diagnosis.4.The driver tried to keep the car ,but failed and it crashed onto a tree.5.They both worked hard day and night in order to .6.We cannot work all the time if we are going to and enjoy life.7.The doctor told him to smoking for the sake of his health.8.You have to carry a mobile phone they can call you at any time.Ⅲ.完成句子1.众所周知,我们中国人民正在尽全力实施“一带一路”建设。
高中英语(新人教版)必修第三册课后习题:UNIT 3 Section A(课后习题)【含答案及解析】
UNIT3DIVERSE CULTURESSection A Listening and Speaking必备知识基础练Ⅰ.单句填空1.Forslan’s object is to gather as great a (diverse) of genetic material as possible.2.I was fortunate (have) a good English teacher in middle school.3.It is believed one day they will have enough animals to set free.4.You’d better write down the key words when (take) notes.5.Do you know when exactly the fortune cookies (invent)?6.After several months of voyage,Columbus arrived in was called America.Ⅱ.短语填空(注意动词的适当形式)1.At first things went very well,but we ran into real trouble.2.If you have good study habits,you can and effort.3.My brother told me that he was going to sometime in the afternoon.4.You need money and time;,you need diligence.5.In African countries every year,many children starvation.6.When water sugar,it makes a pleasant,refreshing drink.Ⅲ.完成句子1.老人打开了房门,发现地上覆盖着厚厚的雪。
英语必修3参考答案
英语必修3参考答案一、听力部分1. A) 正确答案:C解析:根据对话内容,对话中提到了图书馆的开放时间,故选C。
2. B) 正确答案:A解析:对话中提到了学生需要完成一个项目,并且需要使用图书馆的资源,故选A。
3. C) 正确答案:B解析:对话中提到了学生需要在图书馆找一些书籍,但图书馆已经关闭,故选B。
4. D) 正确答案:A解析:对话中提到了学生需要在图书馆找一些书籍,但图书馆已经关闭,所以学生需要明天再来,故选A。
二、阅读理解1. 正确答案:F解析:根据文章内容,第一段提到了文章的主题,即F项所描述的内容。
2. 正确答案:T解析:根据文章第二段,提到了T项所描述的事实。
3. 正确答案:F解析:根据文章第三段,提到了与F项相反的情况。
4. 正确答案:T解析:根据文章第四段,提到了T项所描述的事实。
5. 正确答案:F解析:根据文章最后一段,提到了与F项相反的情况。
三、完形填空1. 正确答案:C解析:根据上下文,这里需要一个表示“考虑”的词,故选C。
2. 正确答案:A解析:根据上下文,这里需要一个表示“计划”的词,故选A。
3. 正确答案:B解析:根据上下文,这里需要一个表示“决定”的词,故选B。
4. 正确答案:D解析:根据上下文,这里需要一个表示“结果”的词,故选D。
5. 正确答案:A解析:根据上下文,这里需要一个表示“选择”的词,故选A。
四、语法填空1. 正确答案:which解析:这里需要一个关系代词引导非限制性定语从句,故填which。
2. 正确答案:had been解析:根据上下文,这里需要一个过去完成时态,故填had been。
3. 正确答案:to解析:这里需要一个介词表示“向”,故填to。
4. 正确答案:that解析:这里需要一个连词引导宾语从句,故填that。
5. 正确答案:faster解析:这里需要一个比较级形式,故填faster。
五、短文改错1. 错误:and改正:but解析:根据上下文,这里需要一个转折连词。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
③材三体现了孔子的天命观。他怀疑鬼神、重视人事,但又承认天命等不可抗拒的力量的存在。
自我测评
1.孔子思想的核心内容是什么?
提示:孔子思想的核心是“仁”和 “礼”,“仁”就是“仁者爱人”, “礼”就是“克己复礼”。
2.老子的“道”是指什么?
提示:老子的“道”具有很高的抽象性,是指世界的本原,它高于万事万物并凌驾于天之上。
岳麓 必修3 课后答案
1课成为中国传统文化的正宗”?
提示:可以从以下两个方面分析,一是中国传统社会的特征-----农业社会的保守性和社会阶层流动的相对灵活性;二是儒家哲学的特征一一守旧而又维新、复古而又开明的二重性。
解析与探究
对比以上三种天命观的差异,并分别作出评价。
提示:①材料一体现了商周延续下来的天命观.神的世界即”上界”有一位统治者 (“上帝”或“帝”) 他仁慈聪明,常常降临 “下界”考察民情,并相应地对人世事务做出安排。
②材料二体现了老子的天命观.他认为 “天”是一种以“道”为本原的客观存在,不以人的意志为转移,其性质是自然无为但又无所不为的。