wether.html5.qq.com,人教版英语九年级全一册Unit 1单元测试卷及参考答案解析(含听力...

UNIT 1 达标测试卷

时间:120分钟 满分:150分

第一卷 听力部分(30分)

一、关键词语选择(共5小题;每小题1分,满分5分)

1. A. note B.nose C. notice

2. A. repair B. report C.repeat

3. A. widely B. quickly C.wisely

4.A. screen B.secret C. second

5. A. look up B. give up C.turn up

二、短对话理解(共10小题;每小题1分,满分10分)

dcbc19242fe0e9ea84a76d6110d6a49f.png

48b8c3280afabb837534d8eebe8fdb11.png

11. How often does Bill ring his mother up?

A. Oncea day. B. Once a week.

C. Oncea month.

12. What does Li Wei think is more importantfor English studying?

A. Pronunciation. B. Grammar. C. Writing.

13. How does the man know about the weather?

A. Bywatching TV.

B. Byreading a newspaper.

C. Bylistening to the radio.

14. What are the two speakers probablytalking about?

A. Howto learn English.

B. Howto make movies.

C. Howto talk with foreigners.

15. What does Peter mean?

A. He susing his ruler now.

B. Marycan use his ruler.

C. Helent his ruler to others.

三、长对话理解(共5小题;每小题1分,满分5分)

听下面一段对话,回答第16至17小题。

16. How does Annie usually exercise?

A. Byplaying baseball.

B. Byplaying basketball.

C. Byplaying volleyball.

17. When will the two speakers meet tomorrowmorning?

A. At 8:50.B. At 9:00.C. At 9:10.

听下面一段对话,回答第18至20小题。

18. What is the girl going to do thisweekend?

A. Takean exam.

B. Reviewher lessons.

C. Helpthe boy with his lessons.

19. When will the boy have his exam?

A. NextThursday.B. Nextweek. C. Next month.

20. What isn t the boy good at?

A. Physics. B. English. C. Math.

四、短文理解(共5小题;每小题1分,满分5分)

21. How often will Ann take training classesat most?

A. Oncea week.

B. Twicea week.

C. Threetimes a week.

22. How will Kevin improve his listeningskills?

A. By takinga course.

B. Bylistening to tapes.

C. Bywatching videos.

23. Where is Mr. Smith from?

A. America.B. Canada.C. Britain.

24. What club does May want to set up?

A. Areading club. B. A story tellingclub.

C. Awriting club.

25. What is Sarah weak in?

A. Speaking.B. Reading.C. Writing.

五、信息转换(共5小题;每小题1分,满分5分)

第二卷 笔试部分(120分)

六、单项填空(共15小题;每小题1分,满分15分)

31. Don t hurry him. You will just have to be________ and wait until he

finishes the work.

A. active B. careful C. patient D. famous

32. —Is this iPad yours?

—Yes. Myparents bought ________ for my language learning.

A. one B. it C. other D.another

33. —How are you getting on with your cousin?

—Verywell. He is really ________ and joins in all kinds of activities

in his spare time.

A. polite B.strict C. active D. careful

34. —Peter, you can never let others know what Ihave told you today.

—Don tworry. I will keep the ________.

A. secret B. money C. grade D. address

35. —Mr Zhang, I can t understand everything inclass.

—Don t worry! I ll ________ the main points at the end of the class.

A. forget B. review C. lose D.remember

36. —________ does your grandma keep healthy?

—She always goes to the square dance.

A. Where B. Why C. How D. When

37. —What are you doing now, Jim?

—I m surfing the Internet. I want to find ________ on it.

A. interesting anything B. anything interesting

C. interesting something D.something interesting

38. —Reading more English books is very useful inEnglish learning.

—I agree with you. ________ you read, ________ you will be.

A. More; faster B. The less; the faster

C. Less; faster D. The more; the faster

39. —How do you usually learn English, Ann?

—________ asking the teacher for help.

A. In B. By C. On D.From

40. The word“retell”means“to tell again”;“reuse”means“to

use again”;“________”probably means“to play again”.

A. display B. replay C.misplay D.interplay

41. —Lucy has improved a lot in English since shejoined the English

club.

—Yes, you re right. How ________ she chose to be in that club!

A. hardly B. clearly C. differently D. wisely

42. —Mum, I really don t know how to use this word.

—Why don t you ________ in your English English dictionary.

A. look it up B.put it off

C. take it down D. give it away

43. Lucy is late for school again ________ theheavy rain.

A. instead of B. according to

C. because of D.compared with

44. Chemistry ________ much easier for me since MrLi began to teach

us.

A. is becoming B.becomes

C. became D.has become

45. —I can t solve this math problem. Can you helpme with it?

—Noproblem. ________.

A. Use it or lose it B. Go ahead

C. It s a piece of cake D. Seeing is believing

七、完形填空(共20小题;每小题1. 5分,满分30分)

A

Davidreceived a parrot(鹦鹉) forhis birthday. The parrot had a poor vocabulary, and many words it said were notpolite.

Davidtried hard to __46__ the bird s words, so he often said polite words, playedsoft music, and tried __47__he could think of to set a good example. Butnothing__48__. He shouted at the bird and the bird just got__49__and becameeven less polite. Finally, when David felt there was no__50__ , he put the parrot in the fridge. For a fewmoments he heard the bird kick(踢) andcry__51__. Then, suddenly, it was quiet. Not a sound for half a minute. Davidwas scared that the bird was hurt and quickly__52__the fridge door. The parrotquietly walked out onto David s arm and said, “I__53__that I have made youangry with me about my impolite language and actions. I am really sorry. I willtry my best at once to be __54__. ”

Davidwas surprised at the bird s change, and he was going to ask what had caused abig change when the parrot said, “May I ask__55__the chicken did? It is also inthe fridge. ”

46. A. change B. buy C.make D. have

47. A. something B. everything

C. nothing D. anything

48. A. worked B. came C.failed D. left

49. A. surprised B. relaxed C. angry D.pleased

50. A. food B. prediction C. clothes D. hope

51. A. quietly B. simply C. exactly D.loudly

52. A. cleaned B. watched C. opened D. closed

53. A. realize B. celebrate C. dream D.forget

54. A. quiet B. polite C. noisy D.impolite

55. A. when B. how C. what D.where

B

How can you get the most information froma book? Here are some__56__which can help you read effectively(有效地).

◆Readthe whole thing

When you re learning something by reading,it s more important to have a(n)__57__idea than to understand every detail(细节). In fact, nomatter how__58__you read, you won t remember or understand all of the details.So why not just remember and record the main points?

◆Decidehow much time you will__59__

If you know that you have only six hoursfor a book, it ll be__60__of you to adjust(调整) yourself. The more clearly you know yourlimits(限制), themore effective your reading will be. So never start to read__61__planning whento stop.

◆Have apurpose

Before you begin, find out__62__you arereading this book. If you don t have reasons of your own, you__63__learn much.After you start to read, try to__64__four questions:Who is the writer?What are the book s opinions? What are the reasons? What are the conclusions?

◆Read itthree times

You ll get the most out of thebook__65__you read it three times—fast reading for general ideas, reading forunderstanding, and then reading for note taking and remembering.

56. A. results B. suggestions

C. choices D. reasons

57. A. general B. proper

C. active D.direct

58. A. lively B. carefully

C. quickly D. badly

59. A. lose B. save

C. spend D.take

60. A. honest B. lazy

C. slow D.wise

61. A. after B. around

C. without D.beside

62. A. how B. what

C. when D.why

63. A. needn t B. shouldn t

C. mustn t D.can t

64. A. think of B. talk about

C. help with D.put out

65. A. so B. but

C. if D. or

八、补全对话(有两项多余)(共5小题;每小题1分,满分5分)

A:English is adifficult language to learn, isn t it?

B:Yes. (66)________

A:True, but Englishis harder than most. It s a crazy language.

B:(67)________

A:Because one lettercan have several pronunciations.

B:(68)________

A:Sure. Listen tothe o in hot, cold, love and to.

B:Hmm. (69)________

A:You see, there areat least four ways to pronounce“o”. Andthere s

another problem with English.

B:(70)________

A:One word can haveseveral meanings. For example, the word catch.

You say to catch a ball, to catch a cold,to catch a bus and to catch a

mouse. They re very different.

B:You re right.English is a crazy language.

九、阅读理解(共20小题;每小题2分,满分40分)

A

A girl shopped with her mum in Walmart. Itwas pouring outside. We all stood under the awning(雨篷). Her voice was so sweet,“Mum, let s run through the rain.”

Mum said,“No, honey, we ll wait until it slows down abit.”The girl waited for about another minuteand said again,“Mum,let s run through the rain.”“We ll get wet if we do that, honey,”Mum said.“No, we won t, Mum. That s not what you saidthis morning,”the girl said.“This morning?”“Don t you remember? When you were talking to Daddy about hisillness, you said: If God can get us through this, he can get us throughanything!”Nothingcould be heard but the rain. Mum thought for a few minutes about what she wouldsay.“Honey, you are right. Let s run through therain. If we get wet, well, maybe we just need to wash ourselves,” Mumsaid. All the others began to stand watching and smiling as they ran past thecars and through the puddles(水坑).

You may lose your money and even yourhealth, but no one can ever take away your memories. So don t forget to makememories.

71.Atfirst the girl s mum wanted to go when ________.

A. itstopped raining B. it rained less heavily

C. other people left D. cars droveslowly

72. From the story, we can gues s the girl sdaddy may ________.

A. getwet B. run away

C. beill D. be worried

73. The others smiled because ________.

A. theythought it was stupid

B. theyfound it funny

C. they didn t lose health

D. theywere moved

74. The writer wants to tell us ________.

A. notto shop on rainy days

B. torun through the rain when it rains

C. notto laugh at others

D. totry to make memories if possible

B

Friendship Restaurant

We havedifferent kinds of Japanese food here. The food menu is in Japanese and Chinese.All the waiters or waitresses can speak at least one foreign language.

Tel:312—9997

Time:11:30am—10:00 pm.

VolunteerProject

Maybeyou want to help others but don t know what to do. Then Volunteer Project willhelp you. Here you will get the best idea of volunteering.

Dial(拨打) 822—5566 to join it.

Email address:Lisa@hotmail. com

The Dream Corner

Doyou want to improve your English? Do you want to practice your English withnative speakers? Then why not join the Dream Corner? Come here on Fridayafternoon every week.

Red Bird Club

Do you like dancing? Do you want to show offyour cool dance at parties? Join us and make your dream come true.

Closed on Tuesday.

Dial 822—3331 for more information.

The Underwater World

Here you will find different kinds of fishesand even some kinds of sharks. You will feel you are in the sea but of coursethis is not true. If you like fishes, I suggest that you pay a visit to it.

Time:9:30 am—5:30 pm

75. In the Friendship Restaurant, you caneat________ food.

A. Chinese B. Japanese C. English D. French

76. Red Bird Club is closed on ________.

A. Monday B. Tuesday

C. Thursday D. Saturday

77. According to the ad, you can see ________in the Underwater World.

A. volunteers

B. excellent dancers

C. sea animals

D. waiters and waitresses

78. If you want to practice English withnative speakers, you can join

________.

A. the Dream Corner B. the Volunteer Project

C. the Red Bird Club D. the Underwater World

C

Do you often feel bored at the weekend? Doyou want to try some new ways to spend a money free weekend with your children?Here s what you can do.

Visityour community(社区)library

A library is not only a house of books, butalso has many CD and DVD collections that you can check out. Many librariesalso have story time for young children, film nights, book clubs and many otherevents—completely for free.

▲____

Introduce yourself to your neighbors if youdon t know them well. Invite interesting ones over for a cup of coffee and achat, just to get to know each other better.

Clearout your media collection—books, DVDs, CDs, and so on

Just go through what you ve got, decidewhich ones you d like to keep, and give up the rest. You can either sell themat a used media shop or exchange them online.

Organizea family walking tour

Find out the interesting places in yourtown, and then go on a walking tour of them. Pack a lunch in your backpack andhave a picnic in the park. You can easily turn this into a full day with yourfamily.

Start abook club—or find one to join

If you like reading and know other peoplethat also enjoy it, consider starting a book club with them. You can read thesame book for a week, and then meet to talk about it.

79.Whichof the following should be put in____▲____?

A. Goto school early. B. Meet yourneighbors.

C. Domore exercise. D. Keep your roomclean.

80. The writer mentions all of the followingin his advice Except

________.

A. libraries B. neighbors

C. jobs D. tours

81. The author has written the passage for ________.

A. students B. children

C. doctors D. parents

82. The author gives us five ways to________.

A. keephealthy

B. makemore friends

C. havea relaxing life

D. spenda money free weekend

D

One day, a crow(乌鸦) happened to fly past a lake. Looking atthe lake, he saw the most beautiful animal he had ever seen. It was a swan(天鹅) and its feathers(羽毛) were as white as snow. The swan wasplaying with other birds happily, talking and dancing. And it seemed that theother birds all liked to stay withit. When he looked at his ownfeathers, they were as black as coal. The crow was very angry with the swan.“How can the swanhave such wonderful feathers?”said the crow. What should he do with hisfeathers? He thought it over and over.

Then, the crow decided that he also wantedto have white feathers like the swan s. From that day on, the crow began tolive like the swan. He moved his home from the woods to the lake. He alsostarted to eat water plants like the swan. He tried his best to talk and dancewith other birds. The most important was that each day, the crow would wash hisfeathers, hoping that they would turn white. Even he went to the nearby riversand ponds to wash his feathers because he thought the water in the lakes wasnot enough for him to wash them. But no matter how hard he washed his feathers,they remained black.

As he ate only water plants, he soon grewthinner and thinner. Not many days later, the crow died.

83.Theunderlined word “it” in Paragraph One refers to ________.

A. thecrow B. the swan

C. thefeather D. the water

84. Why was the crow angry with the swan?

A. Hisown feathers were as white as snow.

B. Theswan did not have black feathers like him.

C. Theswan had beautiful white feathers.

D. Theswan lived in the lake with other birds.

85. Where was the crow s natural home?

A. Inthe lakes. B. In theponds.

C. Inthe rivers. D.In the woods.

86. The crow wanted to live like the swanbecause he wanted to

________.

A. eatwater plants

B. makefriends with the swan

C. havewhite feathers

D. seethe swan s white feathers

87. Why did the crow wash his feathers everyday?

A. Hethought his feathers would turn white.

B. Hewanted to drive the other birds away.

C. Hethought his feathers were dirty.

D. Hewanted to keep his feathers white.

阅读下面短文,并用英语回答问题(请注意每小题后面的词数要求)。

E

An old man lived with his little grandson. Everyday the old man got up early to read books. Oneday the grandson asked,“Grandpa, I want to read books as you do. ButI always forget what I read. What are the advantages of reading?”

The grandfather didn t answer him, but said,“Take this little basket to the river andbring me back a basket of water.”The boy did as his grandpa said, but all the water leaked (漏) out before he got back home. Thegrandfather laughed and said,“You llhave to walk faster next time.”

The next time the boy ran faster, but thebasket was still empty before he returned home. The boy said,“See, Grandpa, it sno use!”

“Is it no use?”the old man said.“Look at the basket.”

The boy looked at the basket and found thatthe basket was different. It was cleaner, inside and out.“That s what happens when you read books. Youmight not understand or remember everything, but when you read them, you willbe changed, inside and out.”

88.Whatdid the old man do every day? (不超过5个词)

_______________________________________________________

89. What did the grandson use to get somewater? (不超过5个词)

_______________________________________________________

90. Whathappens when you read books according to the grandpa s words? (不超过15个词)

_______________________________________________________

十、单词拼写(共5小题;每小题1分,满分5分)

91.Thes (速度) at which he drives isn t allowed here.

92. It s better to reada (大声地) than to read in silence.

93. Our government is trying toc (创造) more jobs for

the young.

94. Mr Li tried tod (发现) the truth of the whole matter, but

he didn t succeed.

95. Dr Ma has helped a lot ofp (病人) see again in the

course of his life.

十一、书面表达(共1小题;满分25分)

假如你是李华,你的美国笔友Joe想知道你们班同学是如何学习化学的,为此你特意进行了调查。请你根据下面的调查结果,给Joe写一封电子邮件,告诉他你们班同学学习化学的各种方法。

b15d40abe3fb74fa2a0e43801cb3e836.png

听力答案:

一、1~5:ACCBA

二、6~10:BABAC11~15:CABAB

三、16~20:BABCA四、21~25:BACBC

五、26.month27.math28.library29.60 /sixty

30.fun

第二卷 笔试部分

六、31.C 点拨:本题考查形容词的词义辨析。句意为:别催促他,

你必须要________并且等候,直到他完成工作。结合句意,

故选C。

32. B 点拨:本题考查代词的用法。句意:——这个iPad是你

的吗?——是的,我父母为了我的语言学习而买了它。one

指代上文提到的同类物品中的一个;it指代上文提到的那个

物品本身;other意为“其他的”;another表示“另一个”。根据

句意,故选B。

33. C 点拨:本题考查形容词的词义辨析。答句中提到:他在空闲时间参加各种活动,可以判断:他真的很“活跃”。故选C。

34. A 点拨:本题考查名词的词义辨析。句意:——彼得,你

千万不要让其他人知道我今天告诉你的话。——别担心,我

将保守秘密。根据句意,故选A。

35. B 点拨:本题考查动词的词义辨析。句意:——张老师,

我不能完全理解课堂上讲的一切(知识)。——别担心,在课

堂结尾我将复习要点。根据句意,故选B。

36. C 点拨:本题考查疑问副词。根据答句“她总是去跳广场舞。”

可推断问句意为“你奶奶是如何保持健康的?”,故选C。

37. D 点拨:本题考查不定代词的用法。something, anything表

示“某事”时,在肯定句中常用不定代词something,在否定句

和疑问句中用anything;另外,当形容词修饰它们时必须后

置。分析此题句式为肯定句。故选D。

38. D 点拨:本题考查比较级的用法。表示“越……,越……”

的句子结构为“the+比较级+主语+谓语,the+比较级+主

语+谓语”。根据句意,可知选D。

39. B 点拨:本题考查介词的辨析。此题意为:——安,你通

常是如何学习英语的?——通过向老师请求帮助。此处是回

答方式,只有by有此用法。故选B。

40. B 点拨:本题考查构词法。句意为:单词retell意思是“复

述”,reuse意思是“再使用”,replay意思可能是“重播”。故选B。

41. D 点拨:本题考查副词词义辨析。意为:——自从参加了

英语俱乐部,露西的英语提高很多。——是的,你说得对。

她选择参加英语俱乐部,是多么聪明呀!结合句意,故选D。

42. A 点拨:本题考查动词短语词义辨析。根据句意,表示“查

字典”要用look up。故选A。

43. C 点拨:根据句意,表示原因要用because of。故选C。

44. D 点拨:本题考查动词时态。句中有since引导的时间状语

从句,可判断要用现在完成时。故选D。

45. C 点拨:本题考查交际用语。句意为:——我算不出这道

数学题,你能帮我算出它吗?——没问题,________。根据

答句中的“没问题”,可以选出答案。故选C。

七、A)46~50:ABACD51~55:DCABC

B)56~60:BABCD61~65:CDDAC

八、66~70:EGBFA

九、A)71~74:BCDDB)75~78:BBCA

C)79~82:BCDDD)83~87:BCDCA

E)88.Heread books.89.A basket.

90. When we read books, we will be changed, insideand out.

十、91.speed92.aloud93.create94.discover95.patients

十一、One possible version:

Dear Joe,

There are forty students in our class. 10% of uslearn chemistry by asking our teacher for help. 20% of the students thinkmemorizing chemical formulas is a good way to learn chemistry. They often spendten to twenty minutes memorizing them every day. About 30% of us improve ourchemistry by doing experiments often and it really helps. The others agree thatworking in groups is the best way to learn chemistry and I am one of them.

Yours,

Li Hua

免责声明:“家有好学生初中版”旨在帮助更多的老师、家长和孩子,分享更多教育资讯,尊重原创并对原创者的文章表示肯定和感谢,相关文章均来自网络搜索,某些文章无法找到详细作者以明确出处请见谅。原作版权归原作者所有,如有侵权,请及时联系处理,我们将立即更正和删除相关内容。本公众号拥有对此声明的最终解释权。

本文来自互联网用户投稿,该文观点仅代表作者本人,不代表本站立场。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如若转载,请注明出处:http://www.mzph.cn/news/566386.shtml

如若内容造成侵权/违法违规/事实不符,请联系多彩编程网进行投诉反馈email:809451989@qq.com,一经查实,立即删除!

相关文章

世界上覆盖范围最广的计算机网络是 ( ),世界上覆盖范围最广的计算机网络是()。...

摘要:部会天翼自动格将俱乐取消员资客户,世界上覆下列情况哪些出现时。围最包单包工总承责任单位对分安全程的承担位和分包生产。计算机网包分政基作业工分建筑础设程施为(劳务和市)和房屋分包施工。...部会天翼自动格将俱乐取消员资客户,世界…

CAM是利用计算机,利用DroidCam将手机摄像头打造成计算机摄像头

利用DroidCam将手机摄像头打造成电脑摄像头1.目的现在许多同学的电脑上没有摄像头,但是随着智能手机的普及,大多数同学都有带摄像头的手机。而智能手机的摄像头比电脑的usb摄像头的效果好很多。那可不可以把手机摄像头用在电脑上来网络聊天呢&#xff0c…

电大计算机应用技术基础视频,电大形成性测评-计算机应用技术基础01

电大形成性测评-计算机应用技术基础01 (7页)本资源提供全文预览,点击全文预览即可全文预览,如果喜欢文档就下载吧,查找使用更方便哦!15.9 积分01任务-在线作业试卷总分:100 测试时间:-- 单项选择题 …

北大计算机博进高校,他是北大第一位博士,留校任教却连做三件“傻事”,博导都没评上...

自北大1898年创办至今,早已度过了风雨百年,一路发展、创造辉煌,令人慨叹不已。身为我国名校的门面招牌之一,北大底蕴深厚、实力强劲,校园环境优美、师资力量雄厚,不知是多少学子可望而不可及的理想学府。在…

计算机打印过的文件在哪找到,请问如何在电脑里查找已经打印过的文件

满意答案苏mmkk2013.07.06采纳率:45% 等级:11已帮助:20600人如果你的系统是XP 的话查找电脑名称:在桌面“我的电脑”上点右键。第二个选项卡上有“计算机名”上面显示的有完整的计算机名,如果想更改的话&#xff0c…

tomcat服务器运行环境,win7怎么配置Tomcat服务器环境|win7系统配置Tomcat服务器环境的方法...

‍‍许多用户询问说win7旗舰版系统怎么配置Tomcat服务器环境?tomcat是什么?它一款轻量级免费开源的Web服务器,我们再使用tomcat时,最好配置一下环境变量。很多新手用户不知道怎么配置Tomcat服务器环境,安装配置Tomcat的方法和java有些相同&am…

心脏遥测监控系统服务器,基于ARM7的心电采集与远程传输系统设计

该系统设计的监护模块与医院内心电监护中心的心电实时监控服务器都工作于客户/服务器模式下。在工作状态下,心电数据接收转发器客户端应用程序,首先初始化以太网接口,然后主动与医院内心电实时监控服务器建立连接;连接成功后&…

linux装服务器系统,linux服务器系统安装

linux服务器系统安装 内容精选换一换安装完操作系统后的临时云服务器需要进行相关配置,并安装原生的XEN和KVM驱动,才能保证后续创建的云服务器正常使用。该任务指导用户完成Linux云服务器的相关配置与驱动安装,从而创建为Linux系统盘镜像。配…

服务器bios修改uefi,服务器 uefi bios设置

服务器 uefi bios设置 内容精选换一换对于不同的硬件设备,通过在BIOS中设置一些高级选项,可以有效提升服务器性能。服务器上的SMMU一般用来完成设备的地址转换,并且可以实现设备隔离,在虚拟化中很实用,但是在物理机测试…

越狱装源未能连接到服务器,科普cydia无法加载源地址插件安装错误解决方法及Cydia怎么备份shsh...

苹果越狱是不少iPhone用户的乐趣,而cydia也是苹果越狱的标志,不过有不少小伙伴却发现自己的,而且也会提示插件安装错误等,那么要怎么解决这个问题呢,不妨随小编一起来研究一下吧。关于cydia无法正常加载插件列表?加载…

思科虚拟机配置dhpc服务器,思科模拟器配置DHCP

第一步,在路由器连接PC0的那个端口f6/0配置ip为172.16.14.1,连接交换机的端口f0/0配置为172.16.13.1,连接服务器的端口f1/0配置为172.16.10.2。上代码:int f6/0ip address 172.16.14.1 255.255.255.0int f0/0ip address 172.16.13.1 255.255.…

artifacts屏蔽java文件输出_Java 是什么?

Java 是一种通用型的计算机编程语言,基于类实现了面向对象的编程范式,通过虚拟机实现了强大的跨平台能力。用 Java 写的代码,既可以在 Windows 操作系统上面运行,也可以在 UNIX、Linux、MacOS 等操作系统上面运行。 Java 代码会被…

ftp同一主机的多个子进程使用同一个套接字_linux进程通信方式对比

管道:速度慢,容量有限(64kB,ulimit -a可以查询的pipe size 指的是一次性写入的大小限制),只有父子进程能通讯 半双工的(即数据只能在一个方向上流动)----(匿名管道)int pipe(int fd[2]); // 返回值:若成功返回0&#x…

ios开发中计算代码运算时间_理解Unity中的优化(二):内存

内存:内存消耗是一个关键的性能指标,尤其是在内存资源有限的平台上,比如低端移动设备。内存消耗分析:在Unity中诊断内存问题,Unity介绍了一款开元的可视化内存分析工具——MemoryProfiler,地址:…

虚拟桌面分屏_桌面中的灭霸 三星C49HG90 32:9超带鱼屏体验

本文作者:dpgisdpg前言参加一起Show桌面活动,顺便搞定之前未做的三星C49HG90DMC显示器开箱作业。搭建一套美如画的桌面,工程堪比“复仇者联盟”,不但需要足够的财力来买装备,还得会构图和互相搭配,打个比方…

rhce考试试题以及答案_搞懂这套五年级数学上册期末考试试题(含答案),考试不担心...

快要期末考试了,今天海老师以北师大版五年级数学上册期末考试的一份试题为例,分析一下六年级数学上册期末考试题型。先看看试卷(答案文后另附):总的来说这份试卷难度适中,主要以面积计算(梯形、正方形、长方形、组合图形)、分数的…

添加中文数据出现问号_怪物猎人世界绚辉龙和冥赤龙的出现时间规律一览

估计在七月上旬煌黑龙出现前,所有的活动任务都不会消失,唯一在变的元素就是绚辉龙和冥赤龙这两条特殊的古龙。绚辉龙和冥赤龙目前看来是交替出现的,也就是说有绚辉龙的日子就不会有冥赤龙,每条龙分别驻场两周。如无意外的话&#…

只可顺守不可逆取书法_闲章不“闲”

点击图片,学习春秋国画教程!闲章由秦汉时期刻有吉祥文字的印章演变而来,宋元以后风气颇盛,名谓“闲章”,其实不“闲”。到了近代,闲章便发展成为中国书画艺术不可或缺的部分。闲章的内容十分广泛&#xff0…

.net core orm框架_轻量级高性能PHP框架ycroute

YCRoute目录框架介绍运行环境代码结构路由配置过滤验签控制层加载器模型层数据交互dao层(可选)Redis缓存操作数据库操作配置加载公共类加载公共函数日志模块视图层RPC 介绍 - 像调用本地函数一样调用远程函数RPC ServerRPC ClientRPC 并行调用附录 - Core_Model 中的辅助极速开…

python子图之间的距离_python与图论的桥梁——igraph

之前收集到一个关于纽约市全年出租车的数据集,于是想到,我们是不是可以用这个数据集来研究一下纽约市中各个社区之间的关联度?为了研究这个问题,就需要使用python来建立一些图论模型。igraph是python/R等语言中常用的建立图模型的…