人教版九年级英语全册Unit 10话题作文素材及范文

九年级英英语作文范例①Unit 1 Section B 3c 范文How do I learn English?I think the best way to learn English is to use it.Every morning I read English aloud after I get up.I practice my listening skills by watching English language videos.Every Friday afternoon I go to the English club to practice conversations with friends.I think it helps me with my speaking skills.Oh,keeping a diary in English is also helpful.In my free time,I usually listen to English songs.It also helps.Now I can sing many English songs.What do you think is the best way to learn Englilsh?Can you tell me?②Self Check Activity 2范文Xu Zheng is a middle school student.He won a prize for his essay about the importance of English.He likes taking notes,watching movies and listening to pop songs.He finds the pronunciation is difficult.And native speakers speak English too quickly.He often learns English by making upconveersations and speaking to friends in English.He thinks most people speak English as a second language.English is used around the world for computers and also used in science.Englilsh can help us understand many new books and movies.③Unit2 Section B 3c作文范文My life has changed a lot.When I was in primary school,I used to study four subjects,but now I have seven subjects.I used to like math,but now I find it so difficult for me.I used to like tests,but now I hate them.When I was young,there is little homework every day.So I had much time to play.But now I‟m a middle school student.I have to study hard all day.④Self Check 范文It seems that Yu Mei has changed a lot.She used to be short when she was younger,but now she is much taller.She used to have long,curly hair,but now she has short,straight hair.She used toplay soccer,but now she plays tennis.Yu Mei used to be quiet and serious,but now she is outing and friendly.We all like her very much.We are good friends.⑤Unit 3 Self Check 范文Dear Editor,I would like to reply the article “Helping and Learning”in your last newsletter.I agree with some ideas and disagree with others.The article said that students should be allowed to do these things,such as going to an old people‟s home.I agree,and we should have a special day to help others.By doing this,we can understand the society more.But I disagree that students should be allowed to have Friday afternoon off to volunteer and help others.I think we can do that on Saturday and Sunday.As for Friday afternoon,we should join different clubs.That would be more fun!Yours sincerely,⑥Unit 4Self Check范文Dear Fran,I‟ve got your e-mail.After I read your e-mail,I just want to give you some advice.First,I think you should help your friend Mei set up her confidence.If she has confidence in herself,she won‟t be terrified of speaking in front of other people.Second,it‟s a good chance to practice English.Don‟t take it as a contest.Third,if your friend is really hard at everything,though she fails,nobody will blame on her.Your friends and other students will understand her.Finally,it‟s inportant to take part in the activity,but not the results.I really hope your friend will win this contest.Wait for your good news.Yours,Knowledgeable⑦Unit 5 Section B 3b范文Then we interviewed some other neighbors.Everyone had their own ideas.Chu family said, “last night,we found footsteps in the hallway.We thought it might be the neighbors,so we didn‟t mind it at all.”Lao Zheng said, “I thoughtsomeone trying to go get in the window when I heard the noise.But I couldn‟t find anyone.At last,I thought it might be the wind.”Xiao Ning said, “Each time when I get home,I can find garbage in front of my house,so I think it might be cats which often eat near my home.”Unit 6Section B 3cMy favorite great book is The Adventure of Tom Sawyer by Mark Twain.Tom is the hero of the story,but there are other important characters.Huck is an outsider and everyone is afraid of him.Becky is pretty with fair hair,Joe is Tom‟s best friend,and Injun Joe is the bad man of the story.The theme of the story is about children growing up.It describes how strangers are seen in small towns of America.Finally,it talks about freedom,social rules and how people are punished for bad behavior.It is read and loved by people all over the world today.Go on---read it !I know you‟ll enjoy it,too.Self Check 2Dear Lingling,Thanks for your letter.How are you?I have just finished the exams.I‟m glad I have time to write to you.Each has his own favorites;so do I.In my spare time ,I like to enjoy music that is gentle and traditional.And I also love to see some French films,which can be good for my French study.I really want to learn some French,too.Unfortunately,I‟ve never seen an Indian film.Besides,I often do sports to build up my body and keep healthy.But most time I like to read books on science.Another thing,I usually eat fruit and vegetables,sometimes meat and fish.I‟m sure that it will keep me healthy.A healthy body is the most important,isn‟t it？Yours,Pen palUnit 7Section B 3bDear S.T. Zhang,I‟d like you to travel to Dalian.Here are the reasons.First,you can enjoy the fascinating sightson the seaside,and then you can enjoy swimming and hiking.Second,there are different kinds of hotels where they provide you with food that you like.If you don‟,you can rent a large room with a kitchen so you can cook meals by yourselves.Since you have about three weeks.I suggest you take a bus.Enjoy yourselves.Yours,AceTravel Self Check 2I‟d like to go to a beautiful place.I think it would be Paris.If I went there,I would visit the famous Eiffel Tower.I can also relax there,because the streets of Paris are so beautiful and have many zoos.So I can go to the zoo and have a look at the animals.The traffic is heavy,but I can take the subway all the time go get around the city and the people there are really friendly.There are so many museums and theatres that I can see plays or shows on art at any time.Unit 8Section B 2Sally Brown is a young woman who wants to be a professional singer.As a volunteer,she sings at a local hospital to cheep up sick people and also sings at school.But after she ran out of money for singing lessons,she came up with ideas for making money.She put up signs asking for singing jobs and also called up parents offering singing lessons for children.Now she will be able to continue her lessons and become a professional singer. Section 4Dear Liz,I was so happy to recerve your letter.Thank you very much for writing to tell me about Lucky.I would really love to come and visit you one day and see how I Lucky helps you.I‟d also like to help you some more because I have some extra time at the moment.Perhaps I could help you at home,or do some work for …Animal Helpers.‟I‟d enjoy watching them train the animals too.I‟ll call them one day soon.Here is my phone number:486-3852.Please call me so we can arrange a time for me to visit.est wishes,ing LiUnit 9Section B 3bFrom pie plate to flying diskThe flying disk was invented by college students.It was a new toy invented in the 1950s.They used a metal pie plate from a bakery in Bridgeport,Connecticut.Students ate the bakey‟s pies,then threw the pie plates.Today,there are flying disk clubs,magazines and a festival.Unit 10Section B 3bOn April Fool‟s Day Nick …s alarm went off.He got up and took a shower.Then he got dressed and went to school.When he got to school,the building was empty.An hour later the other kids showed up.Then he realized that his brother had fooled him.His brother had set his alarm an hour early.Self Check 2This moring Luo Ming overslept.When she woke up,it had been already 10:00.She thought she was late for school and she hurried to school by bike.By the time she arrived at school she realized it was Sunday.She told it to her friend.They lauthed and laughed.Then she had supper with her grandparents.After supper she watched TV in the living room.At ten o‟clock,she went to sleep.。

Unit 1你的英国笔友Frank想学汉语，请你给他写一封信，告诉他如何学习汉语。

Dear Frank,How’s it going? Chinese is really useful and popular now. I have some good ideas to learn it well.First of all, making friends with Chinese is a very good way to improve speaking. Then, you are supposed to read Chinese aloud in the morning. It's good for your listening and speaking. Next, try your best to remember words by making vocabulary lists. Finally, if you see some words you can't understand, you’d better ask a Chinese teacher for help.I hope you can speak Chinese well. In a word, practice makes perfect.Yours, 参考句子：XXX You can watch Chinese-language TV. It’s the best way to improve your Chinese.W hy don’t you join a Chinese club?I believe you’ll be good at Chinese if you work hard at it!Unit 2假如Lily是你的朋友，你与她一起长大，她的变化让你吃惊。

请根据以下内容介绍Lily的变化。

英语9到10单元作文简单Unit 9-10 English Writing: My Favorite Hobby。

Hobbies are a great way to relax and unwind from the stresses of daily life. Everyone has a hobby that they enjoy doing in their free time. My favorite hobby is reading.Reading is a hobby that has been a part of my life for as long as I can remember. When I was a child, my parents would read bedtime stories to me every night. As I grew older, I began to read books on my own. I love the feeling of getting lost in a good book and being transported to another world.One of the reasons why I love reading is because it helps me to escape from reality. When I am reading, I am able to forget about my problems and immerse myself in the story. Reading also helps me to expand my knowledge and learn new things. I enjoy reading a variety of genres,including fiction, non-fiction, and biographies.Another reason why I love reading is because it helps me to improve my vocabulary and language skills. When I come across a word that I don't know, I look it up in the dictionary. This not only helps me to understand the meaning of the word, but also how to use it in a sentence. Reading has also helped me to improve my writing skills, as I am able to learn from the writing styles of different authors.In addition, reading has also helped me to develop my imagination and creativity. When I read a book, I am able to visualize the characters and settings in my mind. This has helped me to become more creative in my own writing and artwork.Overall, reading is a hobby that I will always enjoy.It has helped me to relax, learn, and grow as a person. I encourage everyone to find a hobby that they enjoy and to make time for it in their busy lives.。

回水势能满足凉水塔的能量计算管网如下图所示D——排出几何高度，m；取值：高于泵入口中心线：为正；低于泵入口中心线：为负；S——吸入几何高度，m；取值：高于泵入口中心线：为负；低于泵入口中心线：为正；Pd、P s——容器内操作压力，m液柱（表压）；取值：以表压正负为准H f1——直管阻力损失，m液柱；H f2——管件阻力损失，m液柱；H f3——进出口局部阻力损失，m液柱；H ——总损，m液柱。

设计参数水温T=75℃流量Q=250m3流速V=1.0m/s由公式Q＝v4d2求得d=318mm故我们选择DN300的无缝钢管大于DN250的进水管，合理。

管径d=300mm从冷却器到凉水塔的管道长度L=150m(来源于设计图纸循环水冷却系统)D=13m(来源于设计图纸SL256（1+1）总装图) S=5m （源于设计图纸循环水冷却系统） D －S=8m （凉水塔液面至冷却器回水口） P d －P s =0一、沿程水头损失h f1先确定流态，流体在势能的作用下处于紊流区 由科尔布鲁克（Colebrook ）公式： λ1＝1.14－2lg ⎪⎭⎫⎝⎛+λεRe 35.9d且回水管DN300为无缝钢管 绝对粗糙度ε取0.5mm （查附表1）∴ ε/d=0.5/300=1.67×10-3满足5×10-2~10-6即水力光滑管到完全粗糙管。

公式中λRe 35.9很小，可以忽略，故λ1＝1.14－2lg dε代入ε/d=1.67×10-3 即λ=0.022 ∴h f1＝λd lgv22＝0.022×150×1 2/0.3×2×9.8=0.56m二、管件阻力：（管件、阀门等）h f2名称 数量 单项阻力系数标准弯头90° 10只 ζ1＝0.75（查附表2） 弯管120° 2套 ζ2＝0.2（查附表2） 标准三通管 3只 ζ3＝1.5（查附表2） 闸阀 4只 ζ4＝0.17（查附表2） 止回阀（摇板式） 2只 ζ5＝2 （查附表2） 蝶阀 （45°） 1只 ζ6＝18.7（查附表2） 法兰 16只 ζ7＝0.25（经验值） 变径管 2只 ζ8＝0.25（经验值） 喇叭口 1只 ζ9＝0.25（经验值）h f2=ζgv22=（ζ1+ζ2+ζ3+ζ4+ζ5+ζ6+ζ7+ζ8+ζ9）gv22=(0.75×10+0.2×2+1.5×3+0.17×4+2×2+18.7×1+0.25×16+0.25×2+0.25×1)×12/2×9.8 =2.07m三、进出口局部阻力h f3突然扩大：ζ＝222211⎪⎪⎭⎫ ⎝⎛-d d 由于d1/d 2≈0，所以ζ＝1h f3＝ζgv22=gv22=0.05m四、管网总阻力h fh f ＝h f1+h f2+h f3＝0.56+2.07+0.05＝2.67m 所以H= h f + P d －P s =2.67 m 取修正系数为1.20则H 0=1.25H=1.2×2.67=3.2m ＜D －S=8m 故回水势能满足跃过凉水塔的要求。