homework4

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课课练英语(四年级下册)[第3版] 参考答案

Unit 1Period 1A 1 a 2 a 3 cB 1 b 2 b 3 aC s even, English, Chinese, Maths, Art,PE, Music, Chinese, Maths, EnglishD 1 b 2 a 3 bE 1 back, Nice, see, too2 subjects, Art, about, PEF 1 subjects 2 Art 3 school4 SciencePeriod 2A 略B a 2 b 3 c 6 d 1 e 5 f 4C 1 c 2 b 3 a 4 bD 1 Chinese 2 English 3 Art4 Maths5 Science6 MusicE 1 b 2 c 3 a 4 bF 1 subjects, English, Chinese2 Science, do, don’t, MusicPeriod 3A 略BChinese English PE Art Maths Music Science WangBing√√Su Hai√SuYang√√YangLing√√LiuTao√√C 1 l essons, this, Monday, Maths,Chinese2 subjects, like, PE, go, playgroundD 1 a 2 c 3 e 4 d 5 b, fE 1 T 2F 3 F 4 F 5 TF 略Checkout for Unit 1A 1 a 2 c 3 c 4 b5 a6 a7 b8 cB a 3 b 6 c 5 d 4e 2f 1C 1 b 2 b 3 a 4 c 5 aD 1 T 2 F 3 T 4 TE 1 for 2 subjects 3 lessons4 Chinese5 Maths, don’t6 Monday, schoolF 1 a 2 c 3 b 4 c 5 b 6 bG M onday, lessons, three, Maths,Chinese, Art, English, WhatH 1 MATHS 2 ART 3 MUSIC4 CHINESE5 ENGLISH6 SCIENCEI d g e a f b cJ 1 F 2 F 3 T 4 TUnit 2Period 1A 1 b 2 c 3 b 4 b 5 a 6 aB 1 b 2 a 3 aC W ednesday, table tennis, football,swimming, Saturday附录3《课课练 · 小学英语》（四年级下册）参考答案125D 1 c 2 f 3 b 4 a 5 dE 1 Maths 2 like 3 lessons4 back5 funF 1 F 2 T 3 F 4 T 5 FPeriod 2A 略B a 4 b 6 c 2 d 1 e 3 f 5C 1 a 2 b 3 c 4 bD 1 Saturday 2 Friday3 Thursday4 Wednesday5 Tuesday6 MondayE 1 c 2 a 3 c 4 c 5 bF 1 d ay, Friday, lessons, Maths,Chinese2 Wednesday, EnglishPeriod 3A 略B 1 a 2 a 3 a 4 b 5 aC 1 get, up, seven, six2 g o, football, day, Saturday, Let’s,goD 1 have 2 Where 3 What day4 has5 WhenE 1 T 2F 3 F 4 TF 略Checkout for Unit 2A 1 c 2 c 3 b 4 c 5 a 6 bB 1 ☹ 2 ☺ 3 ☺ 4 ☹ 5 ☹ 6 ☹C 1 c 2 c 3 c 4 b 5 bD 1 a 2 b 3 c 4 bE 1 Chinese, Maths, Music, Science2 M onday, Tuesday, Wednesday,Thursday3 h amburger, noodles, cake,sandwich4 pineapple, peach, mango, grape F 1 a 2 b 3 b 4 c5 b6 aG 1 d 2 a 3 e 4 b 5 cH 1 Y ang Ling has a swimminglesson every day.2 I have a football match thisafternoon.3 Let’s go and play basketball.4 W hen do Su Yang and Su Haiget up every day?I 1 What, day, Thursday2 have, lessons, Sunday3 M aths, Music, Tuesday, Music/Maths4 do, Friday, Chinese, ArtJ 1 F 2 T 3 F 4 T 5 TUnit 3Period 1A 1 a 2 a 3 b 4 b 5 b 6 aB a 4 b 2 c 1 d 3 e 6 f 5C 1 b 2 b 3 a 4 b 5 bD 1 in the morning2 go to school3 do my homework4 watch TV5 in the evening6 在七点钟7 踢足球8 吃午饭 9 每天10 我的一天E 1 c 2 c 3 b 4 bF 1 b 2 c 3 d 4 aPeriod 2A 略B 1 c 2 d 3 b 4 aC 1 b 2 b 3 b 4 a 5 bD 1 c 2 d 3 b 4 a 5 eE a 2 b 1 c 3126F 1 a 2 c 3 b 4 cPeriod 3A 略B 1 usually, in, the, afternoon2 go, home, four3 watch, TV, homework4 school, morning5 Music, TuesdayC 1 b ① 2 c ④ 3 d ③ 4 a ②D 1 has, running, on2 have, lessons, in3 at4 What5 every, twelveE 1 a 2 b 3 a 4 b 5 bF h ave, breakfast, eight, homework,at, go, to, bedCheckout for Unit 3A 1 c 2 b 3 b 4 b 5 a 6 bB 2 4 1 6 3 5C W hen, usually, go, to, school,watch, TV, in, the, eveningD 1 c 2 b 3 a 4 c 5 a 6 bE 1 ☺ 2 ☹ 3 ☹ 4 ☹ 5 ☺F 1 usually, home, eleven2 W hen, your, homework, thirty,evening3 has, football, match, schoolG 1 c 2 b 3 c 4 a 5 bH 1 e 2 c 3 f 4 b 5 d 6 aI 1 a big cake 2 和我一起吃晚餐3 Friday afternoon4 在夜里5 a swimming lesson6 在一点四十五分见面7 go home 8 一只饥饿的猫9 at eight ﬁfteen10 做我的家庭作业J 1 F 2 T 3 T 4 F 5 F 6 TUnit 4Period 1A 1 a 2 a 3 a 4 b 5 a 6 aB a 1 b 4 c 3 d 2C 1 these ﬂowers　2 draw a tree3 on the river4 in the park5 some boats6 一些图片/照片7 九点五十分　8 打篮球9 看一看　10 十点前D 1 b　2 a　3 c　4 b　5 aE 1 ﬂowers　2 trees　3 any4 them5 swim6 are7 anF 1 c　2 a　3 e　4 b　5 dPeriod 2A 略B 1 ☺ 2 ☺ 3 ☺ 4 ☹C a 3 b 1 c 2 d 4 e 6 f 5D 1 a 2 a 3 b 4 c 5 aE 1 can, dance, swim2 play, basketball, Good3 What, some, ﬂowers, themF 1 T 2 T 3 F 4 T 5 FPeriod 3A 略B 1 a 2 a 3 a 4 b 5 aC a 1 b 3 c 6 d 4 e 2 f 5D 1 ﬂower 2 boat 3 river4 park5 lake6 drawE 1 c 2 a 3 e 4 f 5 dF 1 b 2 a 3 a 4 b 5 bCheckout for Unit 4A 1 b 2 c 3 b 4 c 5 aB 1 F 2 T 3 F 4 F 5 T 6 TC can, river, draw, Sure, swim, aboutD 1 b 2 c 3 b 4 a 5 a 6 c127E 1 b 2 a 3 a 4 b 5 aF 1 c 2 a 3 b 4 a 5 b 6 aG 1 b 2 c 3 a 4 b 5 cH 1 I usually go to school at eightforty.2 W hen do you have dinner everyday?3 What can you see over there?4 Can you see the bird in the tree?5 It is difﬁcult, but I can try.6 What day is it today?I 1 ﬁve lessons　2 play table tennis3 after school4 ScienceJ 1 T 2 T 3 T 4 F 5 F 6 FUnit 5Period 1A 1 ☺ 2 ☺ 3 ☹ 4 ☺B 1 b 2 c 3 a 4 dC 1 go boating 2 go swimming3 go climbing4 go skatingD 1 It is cool in autumn.2 W e like winter because we canmake snowmen.3 We go skating in winter.4 Do you like autumn?E 1 a 2 b 3 a 4 c 5 bF 略Period 2A 略B 4 2 3 1 6 5C 1 a 2 a 3 b 4 aD 1 winter, cold, snowmen2 spring, warm, trees, ﬂowers3 summer, swimE 1 e 2 f 3 a 4 c 5 bF 略Period 3A 略B 1 Spring, warm, boating2 Summer, season, hot, swimming3 cold, winterC 1 T 2 F 3 F 4 F 5 T 6 FD w arm, cool, hot, cold, ﬂowers,seasonE 1 summer 2 warm 3 hot4 cool5 winter6 autumn7 cold 8 springhot, cool, winter, cold, springF 1 T 2 T 3 T 4 F 5 FCheckout for Unit 5A 1 b 2 a 3 c 4 b 5 aB 1 ☺ 2 ☺ 3 ☺ 4 ☹ 5 ☺C 1 a 2 a 3 b 4 a 5 bD 1 美好的一天　2 very warm3 吃一块蛋糕4 in spring5 一个白色的风筝6 make snowmen7 你的新包8 ﬂy kites　9 野餐10 two skating lessonsE 1 swimming　2 have3 mangoes, boxes4 kites5 will make, snowmen6 sunnyF 1 d 2 c 3 b 4 aG 1 a 2 a 3 b 4 a 5 a6 c7 c8 c9 b 10 aH 1 cool 2 When 3 some4 snowmen5 draw6 hasI 1 W e usually have picnics in autumn.2 I can make snowmen and goskating.3 I’d like some bananas.4 W hen do you usually get up inthe morning?J 1 go, home 2 river, boat1283 season, winter4 summer, swimK 1 F 2 T 3 F 4 F 5 FUnit 6Period 1A a 2 b 4 c 3 d 1B 1 c 2 a 3 b 4 dC 1 dress, so 2 long, Try3 Whose, father’s4 partyD 1 如此漂亮　2 a beautiful/nice dress3 看我的牛仔裤4 my coat5 怎么了？6 her sweater7 我想是的。

Homework4

Homework4A can in the shape of a right circular cylinder is to be constructed to contain 1000 cm3. The circular top and bottom of the can must have a radius of 0.25 cm more than the radius of the can so that the excess can be used to form a seal with the side. The sheet of material being formed into the side of can must also be 0.25cm longer than the circumference of the can so that a seal can be formed. Find, to within 10-4, the minimal amount of material needed to construct the can.Solution:The area of this can is about the below formulaS=2π(r+0.25)2+(2πr+0.25)hAnd the volume can be write asV=πr2hAnd V=1000, we can combine this two formulasS(r)= 2π(r+0.25)2+2000r +250πrTo find the minimum of S, we must find the zero point of derivative.S′r=4πr+0.25−2000r2−500πr3First, we need to get know about this function, so we can use MATLAB to look for its graph.We can see from this graph that this function decrease at first but increases monotonically from 0 to 100. So when this derivative equals 0, the value of function is the smallest. And for seeking more accurately, we change the foot step.We can see that the solution is between 5 and 6.Thus, we can start our program by using methods as follows:Before all programs, we first define this function and its derivate.function y=f(x)y=4*pi*(x+0.25)-2000/x^2-500/(pi*x^3);endfunction s=df(x)s=4*pi+6000/x^3+2000/(pi*x^4);endAnd the area of materialfunction y=s(x)y=2*pi*(x+0.25)^2+2000/x+250/(pi*x^2);end1 Bisection Methodfunction p=zqh2f(a,b,TOL,N)i=1;FA=f(a);while i<=Np=a+(b-a)/2;FP=f(p);if FP==0||(b-a)/2<TOLfprintf('The procedure was successful after %d iterations',i)returnendi=i+1;if sign(FA)*sign(FP)>0a=p;FA=FP;elseb=p;endendfprintf('Method failed after %d iterations.',N)endSo we can get the answer on the command window >> x=zqh2f(5,6,10^-4,50)The procedure was successful after 14 iterationsx =5.3638>>s(x)ans =573.64902 Newton’s Methodfunction p=new(p0,TOL,N)i=1;while i<=Np=p0-f(p0)/df(p0);if abs(p-p0)<TOLfprintf('The procedure was successful after %d iterations',i) returnendi=i+1;p0=p;endfprintf('Method succeeded after %d iterations.',i)endfunction y=f(x)y=4*pi*(x+0.25)-2000/x^2-500/(pi*x^3);endSo we can get the answer on the command window >> x=new(5.5,10^-4,50)The procedure was successful after 6 iterationsx =5.3639>>s(x)ans =573.64903 Secant Methodfunction p=zqhsec(p0,p1,TOL,N)i=2;q0=f(p0);q1=f(p1);while i<=Np=p1-q1*(p1-p0)/(q1-q0);if abs(p-p1)<TOLfprintf('The procedure was successful after %d iterations',i-1) returnendi=i+1;p0=p1;q0=q1;p1=p;q1=f(p);endfprintf('Method failed after %d iterations.',N)end>> x=zqhsec(5,6,10^-4,50)The procedure was successful after 4 iterationsx =5.3639>>s(x)ans =573.64904 Method of False Positionfunction p=zqhFP(p0,p1,TOL,N)i=2;q0=f(p0);q1=f(p1);while i<=Np=p1-q1*(p1-p0)/(q1-q0);if abs(p-p1)<TOLfprintf('The method succeeded after %d iterations',i-1) returnendi=i+1;q=f(p);if q*q1<0p0=p1;q0=q1;endp1=p;q1=q;endfprintf('Method failed after %d iterations',N)end>> x=zqhFP(5,6,10^-4,50)The method succeeded after 5 iterationsx =5.3639>>s(x)ans =573.64905 Muller’s Methodfunction p=muller(p0,p1,p2,TOL,N)h1=p1-p0;h2=p2-p1;o1=(f(p1)-f(p0))/h1;o2=(f(p2)-f(p1))/h2;d=(o2-o1)/(h2+h1);i=3;b=o2+h2*d;D=(b^2-4*f(p2)*d)^.5;if abs(b-D)<abs(b+D)E=b+D;elseE=b-D;endh=-2*f(p2)/E;p=p2+h;if abs(h)<TOLfprintf('The method succeeded after %d iterations',i-2) returnendp0=p1;p1=p2;p2=p;h1=p1-p0;h2=p2-p1;o1=(f(p1)-f(p0))/h1;o2=(f(p2)-f(p1))/h2;d=(o2-o1)/(h2+h1);i=i+1;endfprintf('Method failed after %d iterations',N)end>> x=muller(5,5.5,6,10^-4,50)The method succeeded after 3 iterationsx =5.3639>>s(x)ans =573.6490I have gave some accurate initial input, but in fact, it seems impossible to seek for theSo we can conclude that Muller’s method performed well comparing with other methods.A sequence converges with rate if lim n→∞e k+1e k r=C,for some finite nonzero constant C.And we can take the logarithm of this ,ln e k+1-r e k=lnCln e k-r e k−1=lnCCombine this two formulas, we can get the CC=ln e k+1e k /ln e ke k−1.Thus, now we can calculate the rate of convergence of these methods. An example:[m,n]=size(t);fori=1:n-1E(i) =norm(t(i)-t(n), inf);endfor j=1:n-3ratew(j)=log(E(j+2)/E(j+1))/log(E(j+1)/E(j)); end[r, t]=new(5,TOL,ITER_max);Thus, we can approximate that Bisection method is linearly convergent,Secant, False Position method and the Muller’s meth od are superlinear convergent. However, Newton’s method should quadratically coverage, but it’s not for this time, may be some fault has existed in my codes.。

homework_4参考

Translate these sentences into Chinese:1.Roughly speaking, a platform represents a computer’s family. It is defined by boththe processor type on the hardware side and the OS type on the software side.Computer belonging to different platforms cannot typically run each other’s programs.大致地说，一个平台代表了一个计算机家族，它是由硬件层面上的处理器类型和软件层面上的操作系统类型共同定义的。

不同平台的计算机通常无法运行彼此的程序。

2.Directory——also called “folder”, a directory is a collection of files typicallycreated for organizational purposes. Note that a directory is itself a file, so a directory can generally contain other directories.目录也叫“文件夹”，通常是用于组织目的而创建的文件的集合，要注意，目录本身也是一个文件，因此，一个目录通常能包含其它目录。

3.Assembly Language is essentially machine language that has had some of thenumbers replaced by somewhat easier to remember mnemonics in an attempt to make it human-readable. The program that converts assembly language to machine language is called an assembler.汇编语言实质上是机器语言，它将一些原始数字用易于记忆的助记符来代替，以试图让人能读懂，将汇编语言转换成机器语言的程序叫汇编程序。

homework4

Homework 4I. Textbook P16-20II. Translate the following passage, thinking about the differences between English and Chinese for science and technologTelevision Operation Guide电视机使用说明书Star Light Brand integrated circuit all-transistor TV Model P-26D, modern in Star Light品牌的全集成电路晶体管电视机模型P-26D，不仅在设计上很时髦，而且design and attractive in appearance, is carefully manufactured to provide full 在外形上也很吸引人，这款电视经过精心生产，可以提供客户全方面要求的满足。

satisfaction. This guide, showing how the set is operated, will assure you of这个说明书，将引导用户如何使用这个这款电视机，确保您更能享受本电视机带来的greater TV enjoyment.乐趣1.ON-OFF: Connect the lead-in of the set to the mains. Pull the ON-OFF开关：连接天线到主干线，同时拉ON-OFF SWITCH和VOLUME CONTROLSWITCH & VOLUME CONTROL and the set is on. Push it and when a “click” is 按钮，此后，这个按钮才打开。

推这个按钮，当您听到“滴”的一声时，这个设置heard the set is shut off.被关闭。

2021春R-精通版五年级英语下册 Unit 3 单元检测卷(2份)

Unit 3 过关检测卷时间：40分钟满分：100分第一部分听力(30分)一、听录音，选出含有所听单词的短语。

(5分)()1. A. think about B. thank you C. throw out()2. A. quite small B. be quiet C. a quick answer()3. A. do housework B. work hard C. do homework()4. A. ask actively B. eat in class C. answer the questions()5. A. a little child B. the green light C. litter on the ground二、听录音，选择正确的图片。

(10分)() 1. A. B. () 2. A. B.() 3. A. B. () 4. A. B.() 5. A. B.三、听录音，选择正确的答语。

(5分)() 1. A. Thank you very much. B. I'm sorry. C. OK, I will. () 2. A. We must keep off the grass. B. We must listen carefully.C. We must do housework.() 3. A. We must cross the street now.B. We must wait for the green light.C. We mustn't wait for the light.() 4. A. No, I'm not. B. Yes, I don't. C. No, I don't. () 5. A. Yes, I often help her. B. No, I can't. C. Yes, I am.四、听短文，判断句子正(T)误(F)。

四年级英语上册--好卷-期中检测卷

期中检测卷时间：60分钟满分：100分题号一二三四五六七八九十十一十二总分得分听力部分(40分)一、听录音，选出你所听到的单词。

(5分)()1. A. wash B. brush C. watch()2. A. hair B. there C. wear()3. A. Thursday B. today C. Tuesday()4. A. shirt B. skirt C. shorts()5. A. they B. these C. day二、听录音，连线。

(5分)1. A. on Saturday2. B. on Monday3. C. in the evening4. D. on Sunday5. E. on Wednesday三、听录音，判断下列句子与你所听内容是(T)否(F)相符。

(10分)()1. These are his gloves.()2. Her dress is very nice.()3. It's Tuesday today.()4. What do they do at home?()5. I play with my sister on Saturday.四、听录音，选择正确的答语。

(10分)()1. A. It's Monday. B. There are seven days.()2. A. He is wearing a sweater. B. She is wearing a long dress.()3. A. Yes, they are. B. Yes, it is.()4. A. I watch TV after dinner. B. I do my homework before dinner. ()5. A. It's on the desk. B. They are under the desk.五、听录音，补全句子。

(10分)1. Are ____________ your trousers?2. She is wearing a ____________ coat.3. I do my ____________ in the evening.4. There are some ____________ in my bedroom.5. I ____________ my clothes at home.笔试部分(60分)六、读一读，选出与所给单词画线部分读音相同的一项。

四年级英语语法联想练习题40题

四年级英语语法联想练习题40题1<背景文章>Last weekend, I went to the zoo with my family. It was a sunny day. We saw many animals. The first animal we saw was a tall giraffe. It had a long neck and beautiful spots. Then we saw a strong lion. The lion had a big mane and it looked very majestic. Next, we saw some cute monkeys. The monkeys were jumping and playing. They were very naughty. We also saw a big elephant. The elephant had a long trunk and big ears. It was very friendly. We had a great time at the zoo.1. What animal has a long neck?A. LionB. GiraffeC. MonkeyD. Elephant答案：B。

解析：文章中明确提到“The first animal we saw was a tall giraffe. It had a long neck”，所以有长脖子的动物是长颈鹿。

2. What does the lion look like?A. CuteB. NaughtyC. MajesticD. Friendly答案：C。

解析：文中提到“The lion had a big mane and it looked very majestic.”，所以狮子看起来很威严。

dinner课件

speaking
Role –play: I’m a waiter!
Role-play
taskA
task B
task C
1.引客入座 2.点菜
1.引客入座 2.点菜 3.上菜
1.引客入座 2.点菜 3.上菜 4.账单
Speaking
Role –play :I’m a waiter!Unit 6 what’s for dinner? Listening and speaking --Can I take your order ? --Would you like to order now? Yes, I’d like …. And for the main course? …., please. Would you like anything to drink?
6. Would you like anything to eat?
Listening activity 1
Post-listening : find out how to be a waiter
1. 问候客人 Good evening.
1. 询问
Can I take your order? Would you like to order now?
杯碟
桌布，桌花菜单，账单
教学程序
1 2
Lead-in Listening
3
4
Speaking
Summary & Homework
Lead in
Let’s watch a video!
Lead in
What do you want to have?
Seafood salad
roast beef

2022--2023学年译林版四年级英语下册期中检测卷含答案

2022--2023第二学期四下英语期中检测卷考试时间：（60分钟）等第：_________第一部分：听力（ 40 分）一、听录音，选出你所听到的内容。

（听两遍）(8分) ( ) 1. A. Thursday B. Tuesday C. Sunday ( ) 2. A. match B. watch C. Maths ( ) 3. A. have dinner B. have breakfast C. have lunch ( ) 4. A. A. 5:40 B. 4:50 C. 4:40. ( ) 5. A. what B. when C. where ( ) 6. A. after class B. after school C. go to school( ) 7. A. I can see a bird. B. I can make a cake. C. I can draw a tree. ( ) 8. A. Welcome back to school. B. Welcome to my home.C. Welcome back to my school.二、听录音，根据所听内容给下列图片排序。

（听两遍）（6分）( ) ( ) ( )( ) ( ) ( ) 三、听录音，根据你所听到的问句，选择正确的答句。

（听两遍）（6分）（）1. A. Yes, I do. B. Yes, I can. C. No, I ’m not. （）2. A. It ’s seven. B. At seven. C. Seven. （）3. A. What a pity! B. How nice! C. Good idea! （）4. A. Yes, I can. B. I can see a kite. C. I can swim. （）5. A. It ’s Monday. B. On Monday. C. It ’s one. （）6. A. We like English. B. Yes, we do. C. No, you don ’t. 四、根据情景判断你所听到的内容，正确的写“T ”,错误的写“F ”。

人教版小学四年级上册英语真题(答案及题解)

人教版小学四年级上册英语真题(答案及题解)(共50道题)下面有答案和解题分析一、综合题1.Which one is used for writing?A. PenB. CupC. SpoonD. Plate2.Which one is a sport?A. SoccerB. ReadingC. SleepingD. Watching TV3.I _______ (not/like) to do my homework.4.Which of these is a common pet?A. TigerB. ElephantC. DogD. Lion5.What is the opposite of "slow"?A. FastB. TallC. BigD. Hotst week, we _______ (have) a great time at the amusement park. We _______ (ride) many roller coasters and _______ (eat) cotton candy.7.I _______ (take/takes) a shower every morning.8.I always _______ (get) up early in the morning. After I _______ (wake) up, I_______ (brush) my teeth and _______ (eat) breakfast. Then, I _______ (go) to school.9.What do you use to open a door?A. KeyB. SpoonC. KnifeD. Fork10.Which is the smallest number?A. 1B. 2C. 0D. 511.She _______ (speak) two languages.12.Which of these is a job?A. TeacherB. BallC. BookD. Chair13.They _______ (are / is / am) very kind.14.I am very good at drawing. My favorite thing to draw is animals. I have drawn many pictures of cats, dogs, and birds. Sometimes, I draw landscapes too.15.They _______ (is / are / am) playing in the park.16.What do you use to write?A. SpoonB. PenC. ForkD. Plate17.This morning, I __________ (1) my breakfast early. I __________ (2) cereal and milk. After that, I __________ (3) my shoes and __________ (4) to school.18.They _______ (be) my best friends.19.We _______ (not/eat) dinner at home today.20.They _______ (play) video games right now.21.Every morning, I __________ (wake) up at 7:00 AM. I __________ (brush) my teeth, __________ (eat) breakfast, and __________ (get) dressed for school. I__________ (leave) my house at 7:30 AM and __________ (arrive) at school at 8:00 AM. After school, I __________ (go) home and __________ (do) my homework.22.We _______ (visit) our grandparents next week.23.I _______ (talk) to my friend right now.24.I _______ (don’t / doesn’t / not) like to eat vegetables.25.My family __________ (plan) to go camping next weekend. We __________ (pack) our bags with clothes, tents, and food. We __________ (leave) early in the morning and __________ (arrive) at the campsite by noon. I __________ (look) forward to spending time in nature.26.They _______ (help/helps) their parents at home.27.He _______ (plays/play) chess with his father.28.I _______ (have) a new pencil case.29.What do we use to write on a blackboard?A. EraserB. ChalkC. MarkerD. Pencil30.I _______ (play) with my toys after school.31.He _______ (eat / eats / ate) breakfast at 8:00 AM.32.I _______ (have/has) a sister.33.We _______ (not/eat) lunch at home.34.What color is a lemon?A. YellowB. GreenC. RedD. Blue35.What is the opposite of "up"?A. DownB. LeftC. RightD. Front36.Which sentence uses "an" correctly?A. I saw an dog.B. I saw an apple.C. I saw a apple.D. I saw a dog.37.We _______ (not/not) go to the zoo on weekends.38.Which of the following is a fruit?A. CarrotB. TomatoC. PotatoD. Onion39.I __________ (not/understand) the homework. It __________ (be) too difficult for me. My teacher __________ (explain) the task again, and I __________ (feel) better after that. I __________ (ask) my friend for help, and he __________ (show) me how to do the exercise. Now I __________ (understand) everything.40.Which of these is a type of tree?A. RoseB. OakC. TulipD. Daisy41.I’m very excited because we’re going on a ______ trip to the beach tomorrow. We will swim in the ______ and build sandcastles. My little sister loves to collect ______ from the beach, and I like to look for interesting ______. Afterward, we will have a picnic with ______ and sandwiches.42.I _______ (have) a pet dog.43.They _______ (be) at the bus stop now.44.Which of these animals is a mammal?A. FishB. BirdC. ElephantD. Snake45.Which of these is a tool for drawing?A. ScissorsB. PenC. KnifeD. Spoon46.He _______ (take/takes) the bus to school.47.What animal is known as the "King of the Jungle"?A. ElephantB. LionC. TigerD. Bear48.I _______ (not) want to go to bed early.49.They _______ (does / do / did) their homework after school.50.They _______ (play) soccer tomorrow.(答案及解释)。

概率论与数理统计习题4 英文版

概率论与数理统计习题4英文版
EECE 7204
APPL. PROB. & STOCH. PROC.
Homework-4 Problem Set with Text
Due on October 18, 2011
2011 FALL
Reading Assignment: Chapter 4 from Stark and Woods, edition 4.
in part (a) above.
0.5
fX(x )
0.5
0
1
2
x
P4.9
Random variable X
is distributed according to the pd e−x u(x).
(a) Determine the mean µx = E [X ] of X . (b) Determine the variance σ2X = E X − µx 2 of X . (c) Determine the skewness of X given by
2x, 0 < x < 1, fX (x) = 0, else.
P4.2 Text Problem 4.18 (Page 285). Verify your answer in part (c) by computing the mean of the conditional mean determined in part (b). Let X and Y be two RVs. The pdf fX (x) of X is given as
P4.5 Text Problem 4.38 (Page 288).
Let X
be
a
uniform

人教版PEP五年级英语上册期末专项听力一：听选词汇、句子附答案

人教版PEP五年级英语上册听力一：听选词汇、句子班级____________学号____________姓名____________得分____________时间：20分钟满分：60分一、听单词, 给每组单词排序。

(15分)1. ()clock()clever ()cooking2. ()fresh ()front ()forest3. ()wash ()watch ()water4. ()sweet ()swim ()strict5. ()building ()bottle ()between二、[浙江省宁波市]听句子, 选出你所听到的内容。

(18分)()1. A. Ms B. Mr C. Mrs()2. A. sport B. schedule C. should()3. A. him B. hill C. high()4. A. next B. noodles C. nature()5. A. building B. boating C. beside()6. A. polite B. plant C. photo()7. A. send B. song C. Sunday()8. A. watch TV B. do homework C. play basketball 三、[浙江省台州市]听句子, 选择你所听到的内容。

(15分)()1. A. Our new PE teacher will come today.B. Mrs Wang will be our new Chinese teacher.()2. A. We have maths on Tuesdays.B. I don't like Tuesdays.()3. A. Here's some fresh milk.B. The vegetables are so fresh.()4. A. Now I can swim away.B. I can dance for you.()5. A. Let's go boating.B. Look at that beautiful bridge.四、[山东省济宁市]听句子或对话, 补全内容。

homework4,词汇1

1. You should be able to ______right from wrong.A. perceiveB. distinguishC. sightD. observe2. Any student who ______his homework is unlikely to pass the examination.A. reducesB. offendsC. practicesD. neglects3. I promise to look _____the matter as soon as I got there.A. forB. inC. intoD. after4. Your sister has made an _____for you to see the dentist at 3 this afternoon.A. appointmentB. interviewC. opportunityD. assignment5. The committee is expected to _____a decision this evening.A. reachB. arriveC. bringD. take6. He spoke so quickly that I didn’t ______what he said.A. make forB. make sureC. make outD. make over•7. I wrote it down _____I should forget it.• A. in case B. in case of• C. in order that D. for fear of•8.It is not that I don’t like plays. The reason why I didn’t go to the theatre last night was that I could not _____the time.• A. offer B. leave C. afford D. manage•9.After a three-hour heated discussion , all the members in the juryreached the conclusions that the man was ______of murder.• A. criminal B. charged C. guilty D. faulty•10. Having finished the letter, he _____it carefully and sealed the envelop with a kiss.• A. folded B. bent C. turned D. curved•11.William has cut his smoking _____to five cigarettes a day.• A. down B. in C. off D. out•12.Professor Smith is always very _____to the reaction of the audience when he gives lectures.• A. sentimental B. sensitive• C. sensible D. positive•13. He has lived here for years _____nobody knows what he is. • A. and but B. though• C. and yet D. for all that•14. I am very disappointed ______the results of the experiment. • A. from B. for C. to D. with•15. The manager of the company sent me a fax saying that he would visit us _______next spring.• A. some time B. sometime• C. sometimes D. some times•16. His few personal belongings made it possible for him to move from place to place ________.• A. in ease B. at ease C. with ease• D. with easiness•17.The boy has performed excellently _______he was bit nervous. • A. in that B. except that• C. for that D. except for•18. We all feel sorry for ________for so long after your arrival. • A. keep you waiting B. having kept you waiting C. waiting for you D. keep you wait•19.All my neighbors tried to help in some way . But they turned out to be actually _____the way.• A. in B. on C. with D. beyond•20.At that time, the poor girl can’t but _______all her belongings at a low price.• A. to sell B. sell C. selling D. sold•21. _____is known to all , too much smoking will cause lung cancer.• A. That B. It C. As D. What•22.The shortage of energy is getting worse, it ____an immediate solution.• A. calls for B. calls off C. calls up D. calls at•23.The teacher spoke so fast that it was hard for the students to _____what he was saying.• A. take in B. take out• C. take up D. take over•24. I think I will do it myself ____asking him for help.• A. rather than B. other than• C. instead of D. in place of•25.I am considering _______my job as I’m not getting on well with my boss.• A. changing B. to change• C. changed D. to be changed•26. It’s so hot. You should put the food into the refrigerator now. Otherwise, it will _____ soon.• A. harm B. hurt C. spoil D. damage•27.Peter, whom everyone suspected, ______to be innocent.• A. turned out B. turned off• C. turned up D. turned over•28. All the arrangements should have been completed prior ____our departure.• A. in B. to C. by D. before•29. I would have joined him in a picnic, but I ______his company.• A. will not like B. don’t like• C. had not liked D. might not like•30.Yesterday Mr. Smith gave a vivid ______of his recent visit to China.• A. dialogue B. idea C. tale D. account31.As they are retired. Mr. and Mrs. Scott prefer a house in the country to__________ their remaining years there.• A .spend B. spending C. spent D. spends•。

现在进行时(1)

Homework 4 Gramma 现在进行时（1）日期：_______ 完成时间:_______一、用所给单词的正确形式补全句子：Build cook go have stand stay swim work1、Please be quiet. I’m working.2、“Where’s John ?”“He’s in the kitchen. He _____________________________.”3、“Y ou ____________________ on my foot.”“Oh, I’m sorry.”4、Look! Somebody _______________________ in the river.5、We’re here on holiday. We _______________________ at the Cental Hotel.6、“Where’s Ann ?”“She _______________________ a shower.”7、They ____________________ a new theatre in the city centre at the moment.8、I __________________ now. Goodbye.二、填入am / is / are 或do / don’t / does / doean’t1、Excuse me, do you speak English ?2、“Where’s Ann ?”“I _____________ know.”3、What’s funny ? Why _____________ you laughing ?4、“What ___________ your sister do ?”“ She’s a dentist.”5、It _____________ raining. I ___________ want to go out in the rain.6、“Where ____________ you come from ?”“ Canada.”7、How much _____________ it cost to phone Canada?8、George is a good tennis player but he ____________ play very often.三、用所给动词的正确形式补全句子。

冀教版四年级英语上册句型专项突破卷附答案

冀教版四年级英语上册句型专项突破卷时间：60分钟满分：100分主题句型梳理(英汉互译)一、有关服装的句型。

(10分)1. 这是一件红色的裙子。

________ ________ ________ ________ ________.2. 这些是黄色的裤子。

________ ________ ________ ________.3. ——她穿着什么? ——她穿着一件白色的T恤衫。

— ________ is ________ wearing?— ________ is ________ a white ________.4. ——我喜欢你的鞋子，它们是新的吗?—I ________ ________ shoes. Are ________ ________?——不，它们是旧的。

它们是我最喜爱的鞋子。

—No，they ________ ________. They're ________ ________ ________.5. ——丹尼，这是你的帽子吗? ——不是。

它是金的帽子。

— ________ this ________ ________，Danny?—No. It's ________ cap.二、描述在家里的活动的句型。

(6分)1. ——你上午做什么?——我做我的家庭作业。

—What ________ you ________ ________ the morning?— ________ ________ ________ ________.2. 你在家做什么?What ________ ________ ________ ________ home?3. 我晚饭后看电视。

I ________ ________ after dinner.三、有关问路和指路的句型。

(10分)1. ——打扰一下，请问图书馆在哪儿? ——我可以带你过去。

—Excuse me, ________ is the ________? —I ________ show ________. 2. This way, please. There it is.____________________________________________________________________ 3. —________________________________________________________________—I'm lost. Where is the zoo?——哦，动物园离这儿挺远的。

人教版小学4年级下册英语模拟(答案和解释)

人教版小学4年级下册英语模拟(答案和解释)(共50道题)下面有答案和解题分析一、综合题1.They _______ (play) soccer every Sunday.2.Oliver is learning how to cook. Today, he is making a __________ (1) for lunch. First, he cuts the __________ (2) into small pieces. Then, he puts them in a pan and adds some __________ (3). After cooking for a few minutes, Oliver adds some __________ (4) and mixes everything together. The smell is very __________ (5), and Oliver is excitedto eat.3.I _______ (help) my brother with his homework.4.What do you use to measure time?A. RulerB. WatchC. ForkD. Knife5.He _______ (eat) breakfast at 7 am.6.She _______ (have/has) three dogs.7.They _______ (watch) a movie now.8.What do you need in order to write?A. A pencilB. A spoonC. A plateD. A fork9.Which of these is a season?A. JanuaryB. SummerC. MondayD. Wednesday10.They _______ happy to see you.11.I love animals, and my favorite animal is the __. It is very big and strong. It has a long neck and loves to eat leaves from tall trees. Giraffes live in Africa, and they can run very fast. I saw one at the zoo last week. It was so tall that I had to look up to see its head.12.I _______ (study) for the test right now.13.Which animal is a mammal?A. FishB. BirdC. CatD. Snake14.He _______ (has / have / had) a new bicycle.15.She _______ (not/play) tennis very well.16.I _______ (write) an email to my friend now.17.My mother __________ (1) a delicious dinner every evening. She __________ (2) chicken, vegetables, and rice. I __________ (3) to help her in the kitchen, and my little brother __________ (4) to set the table. After dinner, we __________ (5) together in the living room.18.Which of these is a fruit?A. CarrotB. BananaC. LettuceD. Cucumber19.Which one is a type of tree?A. OakB. ChairC. BookD. Plate20.Which one is used to clean?A. MopB. SpoonC. PlateD. Chair21.We _______ (have) a picnic next weekend.st summer, my family __________ (go) on a trip to the beach. We __________ (swim) in the sea, and I __________ (build) a big sandcastle. My sister __________ (collect) seashells. It __________ (be) a great vacation.23.Which of these is a type of tree?A. PineB. RoseC. DaisyD. Sunflower24.I _______ (not/not) like to play video games.25.On Sundays, my family __________ (1) like to visit my grandparents. We__________ (2) drive to their house, and when we __________ (3) arrive, my grandmother __________ (4) give us cookies. My grandfather __________ (5) tell us funny stories, and we __________ (6) laugh together. In the afternoon, we __________ (7) play games, and sometimes we __________ (8) go for a walk in the garden.26.She _______ (be) very kind to everyone.st Friday, we _______ (go) on a school trip to a museum. The museum _______ (have) many interesting exhibits, including dinosaurs, ancient tools, and paintings. Our teacher _______ (tell) us a lot about the history of each exhibit. We _______ (learn) a lot,and we _______ (feel) excited to see everything. After the visit, we _______ (have) lunch at a nearby restaurant. It _______ (be) a fun and educational day.28.Which one is used for drawing?A. PencilB. KnifeC. SpoonD. Plate29.Which of these is a shape?A. CircleB. AppleC. ChairD. Book30.Yesterday, I went to the zoo with my family. We saw many animals, such as lions, tigers, and monkeys. The lions were sleeping in the sun, and the monkeys were playing in the trees. My favorite animal was the giraffe because it had a very long neck. After the tour, we had ice cream and took lots of photos. It was a fun day!31.Which one is a vegetable?A. CarrotB. StrawberryC. BananaD. Apple32.They _______ (watch) TV when I called them.33.Which one is a number?A. FiveB. ChairC. SpoonD. Knife34.They _______ (play) soccer every Friday.35.What do we use to clean our hands?A. TowelB. SpoonC. PenD. Fork36.I usually ______ (get) up at 6:30 a.m. every day. However, yesterday I ______ (wake) up late because my alarm clock ______ (not/ring). I ______ (rush) to school, but I still ______ (arrive) on time.37.Which of these is a fruit?A. CarrotB. BroccoliC. OrangeD. Lettuce38.What is the opposite of "fast"?A. SlowB. QuickC. RapidD. Fastest39.They _______ (be) on holiday next month.40.What do we use to erase mistakes?A. EraserB. SpoonC. PlateD. Chair41.She _______ (make) a cake yesterday.42.I _______ (eat) dinner at 7:00 last night.43.I _______ (see) a movie tomorrow evening.44.We _______ (play / plays / played) in the garden yesterday.45.Which of these is used to make a call?A. PenB. PhoneC. KnifeD. Spoon46.Which of these is a place where we live?A. SchoolB. OfficeC. HouseD. Park47.I _______ (like) reading books in the evening.48.We _______ (not) watch TV in the morning.49.He _______ (help) his mother.50.What is the capital of England?A. LondonB. ParisC. TokyoD. New York(答案及解释)。

天津市红桥区2021-2022学年七年级上学期期末考试英语试题含答案

七年级英语一、听力理解（本大题共20小题；每小题1分；共20分）A) 在下列每小题内，你将听到一个或两个句子并看到供选择的A 、B 、C 三幅图画。

找出与你所听句子内容相匹配的图画。

1.2.3. 4.B) 下面你将听到十组对话，每组对话都有一个问题。

根据对话内容，从每组所给的A 、B 、 C 三个选项中找出能回答所提问题的最佳选项。

5. What does the bear eat? A. Bamboo.B. Fruit.C. Meat.6. Who does Jenny often write emails to? A. Her friends.B. Her parents.C. Her teachers.7. When is the boy ’s birthday party ? A. At 4:00 on Friday evening.B. At 4:00 on Saturday evening.C. At 4:00 on Sunday evening. 8. What is Tony doing now? A. He is enjoying the sun.B. He is writing postcards.C. He is looking at maps.9. What is Lisa’s mother doing at the moment ? A. She is cleaning the house. B. She is sweeping the floor.C. She in cooking the meal.A BC A B C A BCCBA10. Where does the girl save her homework?A. On the desk.B. In a box.C. In a document.11. W hat does Mark’s mother do?A. She is a doctor.B. She is a teacher.C. She is a nurse.12. What does the woman want to drink?A. Tea.B. Juice.C. Milk.13. Where does the gir l’s grandparents live?A. Australia.B. America.C. China.14. Whose watch is it?A. David’s.B. Sally’s.C. Lily’s.C) 听下面长对话或独白，每段长对话或独白后都有几个问题，从题中所给的A、B、C三个选项中选出最佳选项。

九年级英语新目标Unit 3 说课课件

九年级英语新目标Unit 3 说课课件Unit 4Teenagers should be allowed to choose their own clothes.河南省濮阳市油田第十八中学高瑞芳初中新目标英语（鲁教版）八年级（下册）基本的说课步骤Part One Talk about the students. 说学生Part Two Analysis of the Teaching Material 说教材分析Knowledge ObjectsAbility ObjectMoral ObjectPart Three Teaching method 说教学方法Part Four Teaching aids 说教学用具Part Five Teaching Steps 说教学步骤Part Six Blackboard design 说板书设计说学生Part One Talk about the students.说教学内容Part Two Analysis of the Teaching Material(一) Status and Function(教材地位）1.The topic of this unit is about rules. In this unit, students learn to talk about what they are allowed to do and learn to agree and disagree. Such topic gives students a chance to express their own opinions.So it’s helpful to raise learning interest of students。

《My day》四年级英语(下)课件稿

(C ) 4. What do you have?
basketballs.
(D ) 5. How many footballs do you D. Twelve.
have?
E. It’s Tuesday.
My day
基础知识
重点单词
ually 通常，常常 2.lunch
午饭
3.home 家
I get up at seven. 我7点起床。 I usually go to school at seven forty. 我通常在7点40分去学校。 I have four lessons in the morning. 我上午有四节课。 I have lunch at twelve. 我在12点吃午餐。
_你__想__要___现__在__吃___早__餐_ 吗？
Words
dinner [ˈdinə]
作名词，意为“晚餐，晚宴；宴会；正餐”。常用短语：after dinner 餐后
family dinner 家宴 eg： We usually have dinner at 6 o’clock pm.
14.at seven
在七点
15.my day
我的一天
16.over there
在那边
17.have four lessons 有四节课
重点句型
1.I usually go to school at seven forty. 我通常七点四十去上学。
2.I have lunch at twelve. 我十二点吃午饭。
5.我通常在七点钟看电视。 I _u_s_u_a_ll_ywa_t_c_h__T_V____se_v_eant ______.

homework4

课课练 英语(四年级下册)[第3版] 参考答案

Homework4

homework_4参考

homework4

2021春R-精通版五年级英语下册 Unit 3 单元检测卷(2份)

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四年级英语语法联想练习题40题

dinner课件

2022--2023学年译林版四年级英语下册期中检测卷含答案

人教版小学四年级上册英语真题(答案及题解)

概率论与数理统计 习题4 英文版

人教版PEP五年级英语上册期末专项 听力一：听选词汇、句子 附答案

homework4,词汇1

现在进行时(1)

冀教版四年级英语上册句型专项突破卷 附答案

人教版小学4年级下册英语模拟(答案和解释)

天津市红桥区2021-2022学年七年级上学期期末考试英语试题 含答案

九年级英语新目标Unit 3 说课课件

《My day》四年级英语(下)课件稿

课课练英语(四年级下册)[第3版] 参考答案

概率论与数理统计习题4 英文版

人教版PEP五年级英语上册期末专项听力一：听选词汇、句子附答案

冀教版四年级英语上册句型专项突破卷附答案

天津市红桥区2021-2022学年七年级上学期期末考试英语试题含答案