第一篇:2013长江寒假作业九年级语文答案3
《长江寒假作业》 九年级 语文 答案
三
1、理至易明:道理极容易明白。
强聒不舍:唠唠叨叨说个没完。
2、梁启超孔子曾国藩
3、A4、D5、yǔnruìjiùlínglíkè
6、①但②既然就
7、绿水前野鸭戏波
8、(1)D(2)浩荡白日天涯
(3)由抒发离别之情转入抒发报国之志。以落花为喻,表明自己的心志,在形象的比喻中,自然而然地融入议论。(4)陆游的词“零落成泥碾作尘,只有香如故。周敦颐的“予独爱莲之出淤泥而不染,濯清涟而不妖。”
9、(1)清明节活动主题:感恩念祖,郊游踏青
端午节活动主题:弘扬传统文化,激发爱国情怀
(2)歌词内容非常符合爱国主题,而且通俗易懂,同学们都熟悉。
(3)神州大地繁花似锦,祖国长空乐曲如潮。在这美好日子里,我们最真诚地祝福我们的祖国繁荣昌盛!我们的人民幸福安康!
(4).但愿人长久,千里共婵娟(苏轼)
10、枉口拔舌贫嘴薄舌巧言活舌张口结舌笨嘴拙舌鹦鹉学舌
11、堂前悬镜,大人明察秋毫。
第二篇:2013长江寒假作业九年级语文答案7
2013长江寒假作业九年级语文答案71、略2、2、举例论证引用论证引用论证
3、C4、略
5、C6、略
7、C8、活动一城市的文明程度越来越高:社区便民配套设施逐年增加;人们的不文明行为逐年减少。
活动二日常行为文明歌正面镜
活动三某某先生,为了您和他人的健康,请不要在公共场合吸烟。
9、开水瓶书电视
第三篇:2013长江寒假作业九年级语文答案6
2013长江寒假作业九年级语文答案61、略
2、外貌描写动作描写心理活动描写环境描写
3、B4、5题略
6、;A勇气是强心剂,让精神萎靡的人焕发活力;勇气是激流,徘徊犹豫的人勇往直前。
7、略
8、镜中看半夜月色朦胧,河滩犹如浸染了一层洁白的乳汁。河里的鲤鱼也没有入睡,跳到河滩上欣赏着自然的美景呢!
9、(1)亚军很沮丧,从此一蹶不振。季军很高兴:只要我下次再加把劲,一定会登上冠军宝座。他最终如愿以偿!
(2)成长是一个不断进步的过程,成长不拒绝失败。
10、句是方向的向字少了左边一竖,故向左一走就通了。
11、马旁求主,驻马还须问主人。
第四篇:九年级英语长江寒假作业答案
九年级英语长江寒假作业答案
第一部分听力(30分)
I.听句子,从A、B、C三个选项中,选择最佳应答语,并在答题卡上将该项 涂黑。每个句子听两遍。(每小题1分,共5分)
1.A.Fine, thanks.B.See you.C.Good morning.2.A.On Sunday.B.At 8 :00 a.m.C.In July, 1989.3.A.Yes, I am.B.Yes, I can.C.Yes, please.4.A.It’s a T-shirt.B.It's a white T-shirt.C.It's his T-shirt.5.A.He is forty.B.He is a doctor.C.He is in black pants.II.听5段短对话。从A、B、C三个选项中,选择最佳答案,并在答题卡上将 该项涂黑。每段对话听两遍。{每小题1分,共5分)
6.What does the man usually do on Sundays? A.He usually plays computer games.B.He usually plays basketball.C.He usually plays football.7.What are they talking about? A.People.B.Cars.C.Traffic accidents.8.What’s the date today?
A.It’s March 17th.B.It’s March 18th.C.It's March 19th.9.Could the boy swim one year ago? A.Yes, he could.B.No, he c ouldn't.C.No, he can’t.10.What’s the woman’s favorite Chinese festival?
A.The Lantern Festival.B.The Spring Festival.C.The Mid-autumn Festival.III.听1段长对话,从A、B、C三个选项中,选择最佳答案,并在答题卡上将 该项涂黑。对话听三遍。(每小题2分,共10分)。www.xiexiebang.com 11.Does Kate like watching TV? A.No, she hates it.B.No, she doesn’t.C.Yes, she d oes.12.How many hours does Kate watch TV every day? A.About four.B.Over five.C.About three.13.Which TV program does Kate like best? A.Movies on TV.B.News reports.C.TV plays.149.How often does Kate watch movies on TV till midnight? A.Every day.B.Sometimes.C.Always.15.What is Jack’s advice?
A.Kate should have enough rest.B.Kate should watch TV for a long time.C.Watching TV is good for Kate’s health.IV.听短文,从A、B、C三个选项中,选择最佳答案,并在答题卡上将该项涂 黑。短文听三遍。(每小题2分,共10分)
16.I am going to ______ every morning during the winter holidays.A.watch TV
B.join a guitar club
C.read English 17.In the evening of the holidays, I’ll watch TV ______.A.for the whole holidays B.for only one hour
C.for one night 18.I will join a ______ club.A.guitar
B.dance
C.music 19.I will ______ on time in my winter holidays.A.read English
B.watch TV
C.go to bed and get up 20.I’m sure I will ______ from the travelling.A.play the guitar betterB.learn English better C.have a good time and learn a lot 第二部分单项选择(10分)
从下列各题所给的A、B、C、D四个选项中,选择能填入空白处的最佳选 项,并在答题卡上将该项涂黑。(每小题1分,共10分)21.Pl ease give ______ English book to her.A.me
B.I
C.mine
D.my 22.—Could you please pass me something to eat? —What about some ______? A.water
B.orange
C.fish
D.tea 23.Her mother goes to work ______ bus every morning.A.by
B.at
C.on
D.in 24.—Who’s that girl?
—You mean ______ one with long blond hair? That's Jack’s daughter.A.a
B.an
C.the
D.不填 25.Lucy ______ a student last year, but now she ______ a teacher.A.is;is
B.was; is
C.was; will be
D.is; was 26.—Were you at home at 9:00 last night? I called you but nobody answered.—Sorry,I ______ at that time.A.take a shower
B.took a shower C.was taking a shower D.am taking a shower 27.—Mum, I can't find my shoes.—Hurry up!Your father ______ for us.A.is waiting
B.waited
C.waits
D.will wait 28.—I have ______ in learning English and I’m so worried.Could you help me with it? —Sure, I’d love to.A.joy
B.interest
C.trouble
D.fun 29.—I’ve never had such a wonderful time.Tha nk you for inviting me.— ______.A.That’s right.B.You're welcome.C.That’s it.D.Good job.30.When winter comes, days get ______.A.long and long B.short and short
C.longer and longer D.shorter and shorter 第三部分
完型填空(10分)
阅读短文,从短文后各题所给的A、B、C、D四个选项中,选择能填入空白处 的最佳选项,并在答题卡上将该项涂黑。(每小题1分,共10分)
Last week our school held a sports meeting.Everyone in our class felt very 31 because we were the winners.In the boys’ relay race, Michael 32__ very fast and our class won the first place.Yu Ting is good 33 the long jump and she 34 won.We,re sorry that we 35 in the high jump, but we’re sure we 36 do better next time.I took part in the boys,37 race.I did my best and was the first 38 the finish Line.TTKis encourages 39 _ a lot.Now I love sports better.I want to be a soccer player.I will take more exercise every day and I hope some day I 40 able to take part in the Olympic Games.31.A.worried B.surprised
C.excited D.frightened 32.A.runs
B.ran
C.run
D.is running 33.A.for
B.in
C.to
D.at 34.A.also
B.too
C.either
D.as well 35.A.do badly B.did badly
C.do well D.did well 36.A.could
B.can
C.may
D.would 37.A.400-meter B.400-meters C.400 meter D.400 meters 38.A.passes B.pass
C.passed D.to pass 39.A.me
B.him
C.her
D.us 40.A.am
B.be
C.will be D.was 第四部分阅读理解(30分)
I.阅读短文,根据短文内容,从短文后各题所给的A、B、C、D四个选项中, 选择最佳选项,并在答题卡上将该项涂黑。(每小题2分,共20分)A American boys and girls love to watch television.Some children spend six hours a day in school and four to six hours a day in front of the television set.Some even watch television for eig ht hours or more on Sunday.Televisions are like books or films.A child can leam bad things and good things from them.Some shows help children to understand the news and places from other countries or other times in history.With television a child does not have to go to the zoo to see animals or to the ocean to see a ship.Boys and girls can see a play, a concert or a game at home.Television brings many places and events into our homes.Some programs show crime and other things that are bad for children,so parents sometimes help them to find other interesting things to do.41.Childre n usually spend ______ a day in school.A.six hours
B.more than eight hours C.only a few hours
D.four hours 42.Some children spend eight hours or more ______ on Sunday.A.studying
B.playing C.watching TV
D.helping their parents 43.On television children can see ______.A.games B.big animals
C.oceans D.almost everything 44.“Television brings many places and events into our homes." means ______ A.television makes things happen on homes B.we can know places and events without going to see them C.we can see houses and buildings on TV D.we can find them easily 45.Parents sometimes help their children find other things to do when there is ______ for children.A.a bad program
B.an animal C.a game
D.an uninteresting film B William Henry Harrison, the ninth president of the US, was bom in a small town.When he was a boy, he was very quiet and shy.Because he was so quiet, every one thought that he wasn't bright.The people in the town often put a nickel(五 分硬币)and a dime(一角硬币)before him and asked him which to choose.He always chose the nickel and they laughed.One day a woman felt sorry for him.She askeddo you never take a dime and always choose a nickel instead? Do you know a nickel is worth much less than a dime?” “ Certainly I know it,,’ William answered slowly.“ But if I choose the dime,they will not ask m e to choose them any more.”
46.Which of the following is true according to the passage? A.William Henry Harrison was the eighth president of the United States.B.William Henry Harrison was bom in a big town.C.William Henry Harrison was very quiet and shy when he was a boy.D.William Henry Harrison wasn’t bright.47.Why did people in the town think that he wasn’t bright? A.Because he was bom in a small town.B.Because he was so quiet.C.Because he was the ninth president of the US.D.Because he liked money.48.Why did the people laugh at William Henry Harrison? A.Becausse he was bright.B.Because he was not shy.C.Because he loved the nickel.D.Because he always chose the nickel.49.Did William Henry Harrison know a nickel was worth much less than a dime? A.Yes, he did.B.No, he didn’t.C.Yes, he does.D.No, he doesn’t.50.What do you think of William Henry Harrison? A.Stupid.B.Clever.C.Naughty.D.Brave, II.阅读短文,判断短文后各题所给句子的内容是否与短文内容相符,相符 的请在答题卡上相应题号后的选项中将A项涂黑,不相符的则将B项涂黑。(每小题2分,共10分)
2012 has also brought in a new age for Chinese TV.The country’s first 3-D TV channel has started broadcasting(播放).Opened on New Year’s Day, the channel will air different programs including documentaries, sports, serials and live events— including the CCTV New Year Gala and the Olympic Games.The 3-D channel broadcasts from 10:30 a.m.through midnight,Beijing time each day.There are no viewing fees(费用)during the early phase of operation(运行阶段),and viewers can get the full 3-D effect by wearing 3-D glasses.Six TV stations have worked together to produce the channel, including CCTV, Beijing, Tianjin, Shanghai, Jiangsu and Shenzhen TV stations.Each station is working on a specific program, while the channel itself is broadcast through CCTV.51.The country's first 3-D TV channel started broadcasting on New Year’s Day.52.The 3-D TV channel will not air the Olympic Games.53.Viewers can get the full 3-D effect by wearing 3-D glasses.54.The 3-D TV channel broadcasts from 8:30 a.m.through midnight, Beijing time every day.55.Tliere are viewing fees(费用)during the early phase of operation(运行阶段)• 卷 II第五部分
任务型阅读(10分)
I.阅读短文,按照短文后的要求答题。请把答案写在答题卡相应的位置。(每 小题2分,共10分)
More than 85% of respondents(调查对象)to a survey about the Chinese Lunar New Year said they expect the festival's traditions to be continued, survey res ults have show n.The survey, done online by the China Youth Daily Social Investigation Center on 7,012 people, showed that 88%of respondents consider reuniting with family to be the most important part of the festival.According to the survey, 78.6% of respondents see the festival as an opportunity to visit relatives as many people live far from their hometowns.Wan Jianzhong, a professor of Beijing Normal University, said that Lunar New Year traditions, including visiting the elderly, holding family get-togethere and setting off firecrackers(放鞭炮),have mostly been preserved(保持),but some others are disappearing.“ During the Spring Festival,people woricing outside their hometowns hurry to get home and reunite with their families.This causes a great national migration(迁徙),because the tradition of family get-togethers on Chinese New Years Eve is rooted in the hearts of the Chinese,” Wan said.任务一:替换
56.写出短文中能替换下列句子划线部分的词或短语。
According to the survey, over 5960 respondents expect Lunar New Year traditions to be continued.任务二:用英语回答问题。
57.How many people were surveyed about the Chinese Lunar New Year? 58.Where was the survey done? 59.Was holding family get-togethers a Lunar New Year tradition? 任务三:翻译
将短文中的划线部分翻译成中文。第六部分
词汇(10分)
根据句意和首字母或汉语提示,写出句中所缺单词的正确形式,每空一词。请把 完整的单词写在答题卡相应的位置。(每小题1分,共10分)
61.Mike’s parents are b __________ teachers.Xk b1.co m 62.People will __________(飞往)to the moon for vacation.63.You should ___________(刷)your teeth after meals.64.Don't __________(吼)!I can hear you.65.Mary wanted to buy a __________(新的)computer.66.Keep your eyes closed.Don't open them u__________ I tell you to do so.67.Lucy is thinner than Lily, but Lily is t __________ than Lucy ? 68.M__________ is the fifth month of a year.69.My favorite season is __________(夏季)because I can swim in the river behind my house.70.What are you g__________ to do tomorrow? 第七部分情景交际(10分)
根据对话内容,在每小题的空白处填上合适的句子,使对话意思完整、通 顺。请把答案写在答题卡相应的位置。(每小题2分,共10分)
David:Excuse me, sir.Could you please tell me the way to the Space Museum? Man: Sorry,.David:Thank you all the same.(Then David goes and asks a woman for help.)David :
Excuse me,could you tell me how I can get to the Space Museum? Woman:Sure.Go along this street.When you reach the traffic lights, turn left.At the end of the road, you'll see it.David:It's very kind of you.By the way,72 ? Woman: No, it is not very far.David : Can I take a bus to get there? Woman : 73.David :74 ? Woman : You can take the No.17 bus.David: 75.Woman:It’s my pleasure.第八部分短文改错(10分)
此题要求改正所给短文中的错误,对标有题号的每一行划线部分和有漏字 符号(A)处作出判断: 如无错误,在该行右边横线上画一个如有错误(每行只有一个),则按 下列情况改正: 划线部分为多余的词:把该词写在该行右边横线上,并划上斜线()。划线部分为错词:在该行右边横线上写出正确的词。有浞字符号处缺一个词:在该行右边横线上写出所缺的词。
请在答题卡相应位罝答题。(每小题1分,共10分)
Two years ago, my English class is difficult.First of all,76.__________ I couldn’t understand the teacher when she speak English.She
77.__________
spoke so quick that I couldn’t understand every word.Later
78.__________ on,I realized that it don’t matter if you dont understand every
79.__________ word.I was also afraid to speak in die class, because I thought
80.__________ my classmates might laugh at me.I couldn’t always make complete 81.__________ sentences,either.Then I started to watched English-language TV.82.__________ I think that doing lots of listening practice is one of the secret of
83.__________ becoming a good language leamer.Now I enjoy leam English and 84.__________ I got an A this term.My teacher is very impressed.85.第九部分书面表达(30分)书面表达分A、B两部分,A部分10分,B部分20分。A.假如你校成功举办了第一次英语角活动,请根据下列提示,以“The First English Comer in Our School”为题,用英语为学校的校报写一篇20-30词的简 讯。请在答题卡相应位罝答题。(10分)
活动时间:2012年6月14日下午3:00-4:00 活动内容:用英语交谈英语学习的方法 活动地点:学校图书馆 参加人数:英语教师和学生共100余人 活动效果:学生积极参与,有利于促进英语学习
B.假如你是张武,是某校八年级学生,感到学习任务太重,每天要学习的科 目多,老师布罝的作业多,连周末和节假日都有做不完的作业,很多时候放学后 老师还要补课,每天几乎都没有属于自己的时间,睡眠时间严重不足,身心疲惫,不知道怎么办。请你以张武的名义用英语写一封80-100词的信给某报社的中 学生信箱,谈谈你的这种情况,并希望老师们少布罝作业,多 关爱学生的健康成 长。(20分)
部分参考词汇:editor(编辑)task(任务)healthy growth(健康成长)subjects(科目)
第五篇:九年级物理长江寒假作业答案
九年级物理长江寒假作业答案
一、单项选择题(每小题2分,共30分)1.下列物态变化中,属于熔化的是()
A.铁块化成铁水
B.盘子里的水晾干了
C.湖水表面结冰
D.水沸腾时水面出现“白气”
2.下列物态变化现象中,属于液化现象的是()
A.初春,冰雪消融汇成溪流
B.盛夏,刚从冰箱中拿出的饮料瓶外壁出现水滴
C.金秋,清晨的雾在太阳出来后散去
D.寒冬,晾在室外冰冻的衣服也会干 3.图1所示四幅图中,由凝华而形成的自然现象是()
4.下列物态变化过程中,需要吸热的是()
A.初春,早晨河面结有薄冰
B.夏天,打开冰棍纸看到“白气” C.深秋,屋顶的瓦上结了一层霜
D.冬天,冰冻的衣服逐渐变干 5.关于“热机”,下列说法中错误的是:
()A.通过技术改进,可以使热机的效率达到100%
B.减少城市热岛效应的措施之一就是倡导“绿色出行”。
C.用水而不用其它循环物质降低热机的温度,主要是利 用水的比热容最大的特性
D.严寒的冬天,有人晚上把热机水箱中的水放出,是防止气温降低时,水凝固而胀坏水箱 6.医生在发烧病人身上擦鞋酒精溶液,可以达到降低体温的效果。他的依据是()
A、酒精熔化时吸热
B、酒精液化时吸热 C、酒精汽化时吸热
D、酒精升华时吸热
7.魔术师把手伸进一锅沸腾的“油”,1分钟、2分钟„„再把手拿出来——没事!对这一现象的分析正确的是()
A.魔术师有特异功能
B.是因为“油”的沸点低 C.“油”在沸腾时的温度不断升高
D.是因为手上沾有水吸收了“油”中的热 8.下列四个实例中,能够使蒸发减慢的是()
A.将湿衣服晾在通风向阳处
B.将湿手伸到干手器下方吹 C.将新鲜的黄瓜装入塑料袋
D.将新收获的玉米摊开晾晒
9.下列有关热现象的说法中正确的是()
A.高空中的冰晶在空气中下落变成雨滴时,内能增加了 B.初冬的早晨,地面上结有一层白霜属于升华 C.所有物体在熔化过程中温度不断升高
D.物体的温度可以降到-273.15℃以下
10.以下与物态变化相关的说法正确的是()
A.气衣柜里放樟脑片,利用了汽化
B.气温低于水银熔点的地方,不能使用水银温度计
C.北方的冬天,在菜窖里放几桶水,是为了利用水的汽化吸热
D.电冰箱使用的制冷物质工作时,在冷冻室要液化,在冷凝器要汽化 11.如图所示,能正确的描述冰的凝固过程的图象是()
12.如图3所示是一个能吹出冷热风的电吹风简化电路图,图中A是吹风机,B是电热丝。下列分析正确的是()
A.只闭合开关S2,电吹风吹出热风
B.只闭合开关S1,电吹风吹出冷风 C.同时闭合开关S1、S2,电吹风吹出冷风
D.同时闭合开关S1、S2,电吹风吹出热风 13.下列有关“电”的说法正确的是()
A.摩擦起电的实质是创造了电荷
B. 电灯中有电流,它的两端一定有电压 C.电路两端有电压就一定有电流
D.运动的电荷一定形成电流 14.如图所示的电路,闭合开关S1和S2后,下列分析正确的是()
A.小灯泡亮,电铃响
B.小灯泡亮、电铃不响; C.小灯泡不亮、电铃响
D.小灯泡不亮、电铃不响
15.某种电脑键盘清洁器有两个开关,开关S1只控制照明用的小灯泡L,开关S2只控制吸尘用的电动机M。在图5所示的四个电路图中,符合上述要求的是()
二、填空题(第17、19、24、25题每空1分,其余每小题2分,共24分)16.我国家庭电路的电压是___________V;对人体的安全电压是不高于________V。
17.向云层投撒干冰是人工增雨、缓解旱情的方法之一。投撒到云层中的干冰
为气体,并从周围
大量的热,使空气中的水蒸气
为小水滴或
为小冰晶,下落而形成雨。
18.如图,把两只手分别放入热水和冷水中。然后,先把左手放入温水中,感觉温水的冷热程度;再把右手放入温水中,感觉温水的冷热程度。先后两次对温水冷热程度的感觉是__________________(选填“左手感觉热些”、“右手感觉热些”或“一样热”)。这一现象表明____________(选填“物体的冷热程度叫温度”、“只凭感觉判断温度是可靠的”或“只凭感觉判断温度是不可靠的”)。
19.如图所示是电冰箱工作原理图。电冰箱工作原理是利用了一种叫氟利昂的物质作为热的“搬运工”,把冰箱冷冻室里的“热” 搬运到冰箱外边。氟利昂是一种既容易___________,又容易____________的物质(填物态变化的名称)。工作时,电动压缩机将氟利昂蒸气压缩并把它压入冰箱的冷凝管里,在这里蒸气变成液体并_________(“吸热,或“放热,),这些热被周围空气带走。冷凝器里的液态氟利昂,经过一段很细的毛细管进入冰箱内冷冻室的管子里,在这里迅速汽化________(“吸热”或“放热”),使冰箱内温度降低,生成的蒸气又被压缩机抽走,压入冷凝器,再液化并把从冰箱内带出来的热放出。氟利昂这样循环流动,冰箱冷冻室里就可以保持相当低的温度。
20.“钻木”能“取火”,说明____________可以改变物体的内能;“烤火”能“取暖”,说明____________可以改变物体的内能.
21.2011年春季以来,长江中下游地区遭遇罕见的旱灾。进入夏季以来,气温的升高加剧了旱情,这是因为气温的升高________(选填“增加”或“减小”)水的蒸发。为了节约用水,果农们利用了滴灌的方法给果树浇水,如图7,把水滴入果树下的土里,这是利用___ _____(选填“增加”或“减小”)水在地面的表面积来减小水的蒸发.22.物理学中把被毛皮摩擦过的橡胶棒所带的电荷称为_____电荷;电荷间的相互作用规律是_______________________。
23.台式电脑使用一段时间后,为保证电脑的稳定性,需要打开主机箱盖除尘,这是因为散热风扇的扇叶在转 动过程中与空气摩擦带上了
,可以
轻小物体,所以灰尘会附着在扇叶上。
24.如图是简化了的电冰箱的电路图。图中M是压缩机的电动机,L是电冰箱内部的照晚灯。当电冰箱接入电路后,关闭了电冰箱的门时,开关S1与S2的状态是S1___ __ S2___
__;当又打开正在工作的电冰箱门时,开关S1与S2的状态是S1___ __ S2___
__。(填“闭合”或“断开”)
25.20kg的柴油完全燃烧释放的热量是
J。(q柴油=3.3×107J/kg)
三、简答题(4分)26.夏天,扇扇子为什么会感到凉快?
四、计算题(每小题7分,共14分)27.木炭的热值为3.4×107J/Kg,完全燃烧多少千克木炭能放出1.7×107J的热量?如果这些热量全部被质量为50Kg、温度为10℃的某种液体吸收,温度升高到90℃。那么,这种液体的比热容是多少?
28.完全燃烧140克的干木柴所放出的热量让质量为5Kg、初温为30℃的水全部吸收,水温会上升多少℃?(干木柴的热值为1.2×107J/Kg,大气压为1标准大气压)
五、实验探究题[第30题(3)第二空、第31题、第33题第三、四空,34题每空各2分,其余每空1分,共28分] 29.请将图所示的测量结果记录在相应的空格中。
(1)温度计的示数_______℃;(2)如图乙所示,体温计的示数是_______℃;
(3)某次测量时两电表示数如图所示,则通过小灯泡的电流为
A,小灯泡两端的电压为
V,30.在探究水的沸腾实验中:
(1)1个标准大气压下酒精的沸点是78℃,煤油的沸点是150℃,完成本实验所用的温度计液泡中的液体可能是
(选填“酒精”或“煤油”);
(2)下表是某组同学的实验记录,他们测得水的沸点是
℃; 时间/min 0 2 4 6 8 10 温度/℃ 90 93 96 99 99 99
(3)请根据上表的数据在图24的坐标中描点画出水的温度 随时间变化图象。(2分)
31.根据图所示的实物电路,在虚方框内画出对应的电路图.
32.将两盏相同的灯L1和L2串联或并联后,直接接在电压为6V的电源上。两灯都发光。请根据下列操作及观察到的现象,判断灯L1、L2的连接方式,并填入表格中。
操作 取下一盏灯 取下一盏灯 将电压表并联接在一盏灯的两端 将电压表并联接在一盏灯的两端
现象 另一盏灯仍能发光 另一盏不发光 电压表示数为3V 电压表示数为6V L1、L2连接方式
33.炎热的夏天来啦!小明家买了一台电风扇。站在电风扇旁,小明觉触凉爽。于是他大胆猜想:是电风扇降低了室内温度。为了验证猜想,他关闭了门窗,选取两支相同的温度计,进行了如下的探究实验。下列步骤中有来完成的部分,请将其补充完整。
这一现象引发了小明的思考,为什么室温没有降低,而吹电风扇却觉得凉爽呢?小明联想到液体蒸发的知识。人体是通过汗液蒸发来调节体温的,人在吹电风扇时,汗液比平时蒸发得更快,所以感到凉爽。
为了证明吹电风扇能加快蒸发吸热的速度,小明又进行了实验,他只增加一种物质,并且首先补充了一个步骤,然后重复前面实验的操作。请你将下表的内容补充完整。
34.在“探究串联电路中各点的电流有什么关系”时,小明设计实验如下.
A点的电流IA B点的电流IB C点的电流Ic 第一次测量 0.3A 0.3A 0.3A 第二次测量 0.2A 0.2A 0.2A 把两个灯泡L1、L2串联起来接到如图所示电路中,分别把图中A、B、C各点断开,把___________接入,测量流过的电流,看看它们之间有什么关系.换上另外两个小灯泡,再次测量三点的________,看看是否还有同样的关系.上表是两次测量的记录数据.
分析和论证:
(1)在拆接电路时,开关S必须处于________状态.
(2)结论:串联电路中各处__________相等.
漳州市浦南中学期中考试卷
九年级物理答案
一、单项选择题(每小题2分,共30分)题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 答案 A B D D A C B C A B A D B C D
二、填空题(第17、19、24、25题每空1分,其余每小题2分,共24分)16.220
17.升华
吸热
凝华
18..⑴右手感觉热些
只凭感觉判断温度是不可靠的 19.汽化(液化)
液化(汽化)
放热
吸热 20.做功
热传递
21.增加,减小
22.负
同种电荷相互排斥,异种电荷相互吸引 23.电荷(静电);吸引
24.闭合 断开
闭合闭合 25.6.6×108J
三、简答题(4分)26.夏天,扇扇子可以加快空气流动(1分),从而加快蒸发(1分),蒸发时吸热(2分)。所以人会感到凉快。
27. 0.5 Kg;4.25×103J/(Kg•℃)
28.Q放=mq=0.14kg×1.2×107J/kg=1.68×106J 根据Q=cmΔt可算出Δt=80℃,但在1标准大气压下,水的沸点是100℃,虽然继续吸热,但温度始终保持100℃不变。所以水升高的温度应为:
Δt=100℃-30℃=70℃ 29.28
36.6 30.(1)煤油
(2)99(3)略 31.如图
32.并联
串联
串联
并联
33.(1)分别放在靠近电风扇和远离电风扇的位置 [增加物质]
水(酒精)
[补充步骤]
将两支温度计的玻璃泡同时蘸取适量的水(酒精)
[分析论证]
靠近电风扇的温度计的示数降低较快(远离近电风扇的温度计的示数降低较慢)
34.电流表 电流
(1)断开 2)电流
(