第一篇:八年级阅读首字母周周练(七)
八年级阅读周周练
(七)(A)
At one time, making a film was an expensive activity only for a small group of people and film companies.Not only were the tools and machines expensive but the cost of film was also far greater than most people could afford.However, modem technology has c___1___ all that.New technology has really opened up the world of film-making for film fans.Now a camera does not cost m___2___ and most young people are certainly able to pay for it.So all you need is to get one for yourself.With that, you may then start your own film-making.However, film-making is t__3____ work.You probably need many other people to help you.For example, the p___4___ of actors and actresses is very important in your film.Of course, these actors and actresses may be your schoolmates, friends or family members.You don't even need to pay them a cent while they are glad to be part of your job.B____5__, you need to make up a story.Can you write your own one? If you have good imagination, you can create an attractive story e____6____.Many world-famous film makers and producers are also good story-writers.If not, perhaps you need someone else to write it for you.An excellent story is the key to making a s__7____ film.Are you going to be a cameraman yourself? When filming, who is going to take care of the lighting? Who is going to make the furniture, the background and things like that? If you can’t do all these things, you need to think about asking other people to help you.Remember: Film-making is not a one-man business.1.changed 2.much 3.team 4.performance 5.Besides 6.easily 7.successful
(B)
哈佛北大精英创立
A survey has been published which shows that British people don't like their neighbours very much.80% of the people who took part in the survey feel that their neighbours h __1___ pay attention to others’ feelings.25% don't talk lo the people who live next door and 10% don't even know their names.In fact, one million people in Britain would like to m ___93__ because they don't get along well with their neighbours.According to the survey, the b____3___ problem is noise.Many of the complaints about noise came from people who live in flats and old houses.These places often have thin walls which can't s____4___ the noise from next door.The other main problems are disagreements(争吵)about car parking spaces, and old people complaining about the young.Some disagreement last a 1___5___ time.In one case, people who live in the same building haven't talked to each other for fifteen years.Sometimes the disagreements end in violence.In one of the worst cases, a man killed a neighbour because he kept parking in “his space”.Another survey shows that 90% of the neighbours never share a meal, 80% have never had a drink t___6___, and 20% have never even spoken.However, when neighbours become each other's f___7___, they are often ready to offer help, as we can see in many parts of the world.One solution to such problems is to talk about them with a professional organization and if necessary, to sign a written agreement.Now people can get this service in more and more towns.1.hardly 2.move 3.biggest 4.stop 5.long 6.together
7.friends
(C)
“There is no love which is more sincere than the love of food,” said Anglo-Irish writer George Bernard Shaw.Like Bernard Shaw, many writers e___1___ food very much, and they say and write interesting things about it.British poet Owen Meredith(1831-1891)learnt a lot about food when he lived in Paris.He famously said, “We may live without friends, we may live without books, but civilized(文明的)men cannot live
哈佛北大精英创立
without c____2____.American writer Mark Twain also wrote a lot about food.“When you have t___3___ watermelon,” he wrote, “you know what angels eat.”
American cookbook writer Alice May Brock has some simple rules about food from different c ___4___.“ If you want to cook international food, it’s easy,” she wrote.“Put tomatoes on the plate and it’s Italian.Use soy sauce and it’s Chinese.A___5___ wine to the recipe(食谱)and it’s French.Sour cream makes it Russian and lemon makes it Greek.But garlic makes it good!Cheers!”
Tea and coffee are even more i___6____ for some people.There is a Chinese saying, “It is better to go without food for three days, than tea for one.”
American President Abraham Lincoln was often rude about the tea and coffee which was served to him.For example, he was in a Washington restaurant one day, and when the main meal was over, a cup of hot l_____7___ was placed in front of him.He drank a bit and was clearly angry.“Waiter,” he said, “if this is coffee, please bring me some tea;and if this is tea, please bring me some coffee.”
1.enjoy 2.cooks 3.tasted 4.countries
5.Add 6.important 7.liquid
哈佛北大精英创立
第二篇:初二语文周周练七
初二语文周周练七
认真阅读下面的短文,完成文后问题。(答案写在试卷背面)
别忘了,投我一票
同学们:
①春天来了,我也来了。我驾着踌躇满志的春风而来,来竞选学生会主席。②这,便是我给您的第一印象:戴眼镜,很健康!我是高一(3)班班长,大家都认为我感召力与工作能力强。我的简介,您大概看过吧,不知为我喝过彩没有。不过千万别喝彩,因为那只是美好的往事、光辉的历史或说是为了忘却的回忆。我需要的是未来的成绩。
③毕竟,工作锻炼了我,生活造就了我。我觉得自己有勇气、信心与能力。戴尔〃卡耐基曾说:‚不要怕推销自己。只要仍然认为自己有才华,你就应认为自己有资格担任这个或那个职务。‛我认为我准行。以前,有人对我说,你就别当什么干部了,当学生官吃力不讨好,干不好爱招惹风凉话。我承认,这是事实,但我又认为‚走自己的路,让别人去说吧!‛正因为这样,我才说我有勇气去面对现实,有勇气去改变现实。
④我自信,我能胜任学生会主席,我将用旺盛的精力和清晰的头脑,认真出色地工作。假如我落选了,我将带着微笑走向明年,养精蓄锐以待东山再起!当然,‚落选‛就像沙漠里下暴雨,其可能性很小。同学们,此时此刻,您是否看到了我的头上正有一股自信之气在升腾!
⑤我想:既然是竞选,就该谈点任职后的工作计划。我打算搞一些活动,如演讲与朗诵比赛、辩论会、联欢会、球赛等等,并重振文学社。以上仅作为我的‚宏观‛的工作计划,当然,也少不了该做一名实干家。所以,我只要求方案精炼,符合实际,便于实干,这样就会产生良好的效果,就不需那美丽或枯燥的词汇来说明了。让时间与事实考验我吧!
⑥诸位,在以后的岁月里,你会了解我的。支持我吧,让我周身工作的细胞兴奋起来吧!别忘了,投我一票!
1、从文中第②节内容看,作者对于自己的过去十分,但仅简练的一笔带过,没有展开的原因是?
2、文章第④节划线句‚当然‘落选’就像沙漠里下暴雨,其可能性很小‛,这句比喻句的作用是?
3、第⑤节‚宏观‛与‚微观‛这一组相对概念分别具体指什么?
4、读了这篇演讲,想象一下,假如当时你是一名学生代表你会投他一票吗?说说你的理由。
初二语文周周练七
认真阅读下面的短文,完成文后问题。(答案写在试卷背面)
别忘了,投我一票
同学们:
①春天来了,我也来了。我驾着踌躇满志的春风而来,来竞选学生会主席。②这,便是我给您的第一印象:戴眼镜,很健康!我是高一(3)班班长,大家都认为我感召力与工作能力强。我的简介,您大概看过吧,不知为我喝过彩没有。不过千万别喝彩,因为那只是美好的往事、光辉的历史或说是为了忘却的回忆。我需要的是未来的成绩。
③毕竟,工作锻炼了我,生活造就了我。我觉得自己有勇气、信心与能力。戴尔〃卡耐基曾说:‚不要怕推销自己。只要仍然认为自己有才华,你就应认为自己有资格担任这个或那个职务。‛我认为我准行。以前,有人对我说,你就别当什么干部了,当学生官吃力不讨好,干不好爱招惹风凉话。我承认,这是事实,但我又认为‚走自己的路,让别人去说吧!‛正因为这样,我才说我有勇气去面对现实,有勇气去改变现实。
④我自信,我能胜任学生会主席,我将用旺盛的精力和清晰的头脑,认真出色地工作。假如我落选了,我将带着微笑走向明年,养精蓄锐以待东山再起!当然,‚落选‛就像沙漠里下暴雨,其可能性很小。同学们,此时此刻,您是否看到了我的头上正有一股自信之气在升腾!
⑤我想:既然是竞选,就该谈点任职后的工作计划。我打算搞一些活动,如演讲与朗诵比赛、辩论会、联欢会、球赛等等,并重振文学社。以上仅作为我的‚宏观‛的工作计划,当然,也少不了该做一名实干家。所以,我只要求方案精炼,符合实际,便于实干,这样就会产生良好的效果,就不需那美丽或枯燥的词汇来说明了。让时间与事实考验我吧!
⑥诸位,在以后的岁月里,你会了解我的。支持我吧,让我周身工作的细胞兴奋起来吧!别忘了,投我一票!
1、从文中第②节内容看,作者对于自己的过去十分,但仅简练的一笔带过,没有展开的原因是?
2、文章第④节划线句‚当然‘落选’就像沙漠里下暴雨,其可能性很小‛,这句比喻句的作用是?
3、第⑤节‚宏观‛与‚微观‛这一组相对概念分别具体指什么?
4、读了这篇演讲,想象一下,假如当时你是一名学生代表你会投他一票吗?说说你的理由。
第三篇:八年级语文周练九
八年级语文下册周练九
一、基础知识及运用(33分)
1、下列注音有误的一项是()(4分)
A.幼稚(zhì)鲲鹏(kūn)吞噬(shì)媲美(bì)....
B.挑衅(xìn)迷惘(wǎng)滑稽(jī)苔藓(tái)....
C.雾霭(ǎi)迁徙(xǐ)和煦(xù)咫尺(zhǐ)...
D.惩罚(chéng)蓬蒿(hāo)干涸(hé)诺言(nuò)....
2、下列各组词语中加点的字的读音,与所给注音全都相同的一组是()(4分)
A.解 jiě解决押解解释解数 ....
B.宿sù宿舍宿营宿命归宿 ....
C.恶wù厌恶恶心恶习恶劣 ....
D.差chā差错误差出差差距 ....
3、下列字形有误的一项是()(4分)
A.混淆深邃赋予相形见绌
B.考察戈壁清澈沧海桑田
C.郭煌狼藉崩塌混然一体
D.端详焦躁收敛美味佳肴
4、根据诗意默写(21分)
(1)、韩愈《早春呈水部张十八员外》中诗人以细腻的观察力和独特的视角勾勒出春天走近的过程的诗句:。诗中对早春加以赞颂,且极具有哲理的诗句:。
(2)、李商隐《无题》诗中运用比喻修辞,以谐音双关的手法表达对爱情忠贞不渝的诗句:。诗中原为表达思念之情,现常用来表达对具有无私奉献精神的人的赞颂的诗句:。
(3)、李煜《相见欢》词中词人眼望楼外之景,心头笼上凄冷之情的句子:。词中现在经常被人们用来形容心绪烦乱,某事令人难以解决的词句:。词中运用形象的比喻,将难以言状的愁绪描绘出来的名句:。
(4)、王安石《登飞来峰》诗中表现诗人高瞻远瞩的远大政治抱负的诗句:。诗中表现诗人虽然变化遇到挫折,但仍矢志不改的诗句(诗中表现诗人不畏艰难,极具有深刻哲理的诗句):。
(5)、范仲淹《苏幕遮》由眼中实景转为意中虚景,而离情别绪则隐寓其中的诗句是:。用一段‘愁肠’把‘泪’与‘酒’巧妙联系起来,弥漫着苍凉之悲,读起来令人回肠荡气的诗句是:。
二、课内文言阅读(42分)
(一)庆历四年春,滕子京谪守巴陵郡。越明年,政通人和,百废具兴,乃重修岳阳楼,增其旧制,刻唐贤今人诗赋于其上。属予作文在记之。
予观夫巴陵胜状,在洞庭一湖,衔远山,吞长江,浩浩汤汤,横无际涯;朝晖夕阴,气象万千。此则岳阳楼之大观也。前人之述备矣。然则北通巫峡,南极潇湘,迁客骚人,多会于此,览物之情,1
得无异乎?
1.对文中加点的词浯;解释不正确的一项是()(3分)
A.胜状:胜景,好景色。
B.横无际涯:宽阔无边。
C.南极潇湘:潇水和湘水的南边极远。
D.骚人:战国时屈原作(离骚),因此后世称诗人为骚人。
2.‚览物之情,得无异乎‛中的‚之‛意为‚的‛,下面句中加点的‚之‛字不是‚的‛的意
思的一项是()(3分)
A.属予作文以记之B.此则岳阳楼之大观也
C.前人之述备矣D.予尝求古仁人之心
3.对第一段文字的理解和分析,不正确的一项是()(3分)
A.这段文字简要记述了滕子京重修岳阳楼以及作者写作本文的缘由。
B.‚越明年‛的意思是‚到了第二年‛。
C.‚政通人和,百废具兴‛写滕子京虽为‚谪守‛亦政绩显著。
D.‚属予作文以记之‛中的‚予‛即范仲淹的朋友膝子京。
4.对第二段文字的理解和分析,不正确的一项是()(3分)
A.这段文字详细描写了洞庭湖及其周围的景色。
B.‚前人之述备矣‛是对‚岳阳楼之大观‛的小结,简洁不繁。
C.‚然则‛轻轻—转,引出‚迁客骚人‛可能有的不同的情怀。
D.‚览物之情,得无异乎?‛一句反问,引出下文的写景抒情。
5、下列说法不正确的一项是()(3分)
A、选文第①段中‚朝晖夕阴,气象万千‛是洞庭湖千变万化的特点。
B、选文第①段中的‚览物之情,得无异乎‛在结构上所起的作用是引起下文。
C、选文第②、③段除写景之外,还分别抒发了迁客骚人登楼时‚喜‛和‚悲‛的情感。
D、选文写‚暗景‛用语雄浑浓郁,状‚明景‛用词清丽明快。
6、翻译句子(4分)
(1)衔远山,吞长江,浩浩汤汤,横无际涯。
(2)迁客骚人,多会于此,览物之情,得无异乎?
(二)若夫淫雨霏霏,连月不开,阴风怒号,浊浪排空;日星隐曜,山岳潜形;商旅不行,樯
倾楫摧;薄暮冥冥,虎啸猿啼。登斯楼也,则有去国怀乡,忧谗畏讥,满目萧然,感极而悲者矣。至若春和景明,波澜不惊,上下天光,一碧万顷;沙鸥翔集,锦鳞游泳;岸芷汀兰,郁郁青青。而或长烟一空,皓月千里,浮光跃金,静影沉璧,渔歌互答,此乐何极!登斯楼也,则有心旷神怡,宠辱偕忘,把酒临风,其喜洋洋者矣。
嗟夫!予尝求古仁人之心,或异二者之为,何哉?不以物喜,不以己悲;居庙堂之高则忧其民;处江湖之远则忧其君。是进亦忧,退亦忧。然则何时而乐耶?其必曰‚先天下之忧而忧,后天下之乐而乐‛乎。噫!微斯人,吾谁与归?
1.解释下列句子中加点的词。(4分)
(1)至若春和景()明(2)宠辱偕()忘
(3)把()酒临风(4)予尝求()古仁人之心
2.下列句中加点的词理解错误的一项是()(3分)
A.而或长烟一空(或许)B.或异二者之为(的)
C.处江湖之远则忧其君(他的)D.微斯人,吾谁与归(没有)
3.翻译句子(4分)
①不以物喜,不以己悲。
②微斯人,吾谁与归?
4.‚或异二者之为‛中的‚二者‛具体指的是哪两种心情?(4分)
5.‚是进亦忧,退亦忧‛中的‚进‛和‚退‛分别指什么?(4分)
6.最后一段文字的中心意思是什么?(4分)
三、课外阅读(25分)
(一)现代文阅读(13分)
牵着母亲过马路
①周末下午偕妻儿回家,年近花甲的母亲喜不自禁,一定要上街买点好菜招待我们。母亲说:“你们回来,妈给你们煮饭,不是受累,是高兴呀!”我便说:“我陪你去吧!”母亲乐呵呵地说:“好,好,你去,你说买啥,妈就买啥。”
②到菜场需要走一段人行道,再横穿一条马路。正是下班时间,大街上车来车往,川流不息的人群匆匆而行。年龄大了,母亲的双腿显得很不灵便。她提着菜篮,挨着我边走边谈些家长里短,我宽容地耐心地听她诉说。儿女们还能不听?
③穿过马路,就是菜场了。母亲突然停了下来,她把菜篮挎在臂弯,腾出右手,向我伸来…… ④一刹那间,我的心灵震颤起来:这是一个多么熟悉的动作呀!
⑤上小学时,我每天都要穿过一条马路才能到学校。母亲那时在包装厂上班。学校在城东,厂在城西,母亲担心我出事;每天都要送我,一直把我送过公路才折身回去上班。横穿马路时,她总是向我伸出右手,把我的小手握在她掌心,牵着走到公路对面。然后低下身子,一遍遍地叮嘱:“有车来就别过马路”,“过马路要跟着别人一起过”……
⑥20多年过去了,昔日的小手已长成一双男子汉的大手,昔日的泥石公路已改进成混凝土路,昔日年轻的母亲已经皱纹满面,手指枯瘦,但她牵手的动作依然如此娴熟。她一生吃了许多苦,受了许多罪,这些都被她掠头发一样一一掠散,但永远也抹不去爱子的情肠。
⑦我没有把手递过去,而是伸出一只手从她臂弯上取下篮子,提在手上,另一只手轻轻握住她的手,对她说:“小时候,每逢过马路都是你牵我,今天过马路,让我牵你吧!”母亲的眼里闪过惊喜,笑容荡漾开来,像一个老农面对丰收的农田,像一个渔民提着沉甸甸的鱼网……
1、①段中写‚年近花甲的母亲喜不自禁‛,第⑦段中写‚母亲的眼里闪过惊喜‛(2分)。
(1)母亲为什么喜不自禁?(1分)
(2)母亲为什么眼里闪过惊喜?(1分)
2、第4段中‚我的心灵震颤起来‛的原因是什么?(2分)
3、‚我‛周末回家做了些什么?请用简洁的语言分三点概括。(每一点不超过8个字)(3分)
4、第6段叙说许多方面都发生了变化,惟独母亲‚牵手的动作依然如此娴熟‛。这样写采用了什么手法?在表达上有什么作用?(2分)
5、下列叙述,与原文意思不相符合的一项是()(2分)
A、这篇散文的重点是写‚我‛牵着母亲过马路,文中也回忆了小时候母亲牵着‚我‛的小手过马路的情景。
B、文中的母亲,不仅仅是‚我‛的母亲,也是包括读者在内的大家的母亲,同时也是我们伟大祖国的象征。
C、这篇文章以叙事为主,精选了生活中的一个片断,将炽烈的感情寓于字里行间,语言平白如话,质朴无华。
D、文章最后一段连用两个比喻句,生动形象地表现了母亲欣慰、满足和喜悦之情,增强了文章的感染力。
6、这篇散文写得很感人,(1)你认为最使自己感动的内容是什么?(2)你受到了什么启发或教育?(2分)
(1)
(2)
(二)课外文言文阅读(12分)
鲍子难客
齐田氏祖于庭,食客千人中坐。有献鱼、雁者,田氏视之,乃叹曰:‚天之于民厚矣!殖五谷,生鱼鸟,以为之用。‛众客和之。有鲍氏之子,年十二,亦在坐,进曰:‚不如君言。天地万物与我并生,类也。类无贵贱,徒以小大智力而相制,彼此相食,非相为而生。人取可食者食之,岂天本为人生之?且蚊蚋(ruì)囋(zá)肤,虎狼食肉,非天本为蚊蚋生人、虎狼生肉者也!‛
【注释】①田氏:齐国姓田的(贵族)。②祖:古人出远门设宴祭路神叫‚祖‛。③ 殖:种植。④非相为而生:不是为了对方的生存而生存的。⑤蚋:一种吸血的小虫。⑥囋:叮咬。⑦食客:春秋战国时期凭一技之长投靠贵族的人叫‚食客‛。权贵人家为了网罗人才及显示实力,多的有食客三千,少的也有数百。在食客中有的善出谋划策,有的善外交辞令,那些擅长于偷鸡摸狗的有时也能成为食客。食客中凭才能大小区分等级。
1、解释(4分):①众客和之和:②亦在坐亦:
③天地万物与我并生并:④类也类:
2、翻译(4分):①天之于民厚矣②不如君言③徒以小大智力而相制(2分)
3、题目‚鲍子难客‛中的‚难‛,解释为。(2分)
4、本文告诉我们一个什么道理?(2分)
八年级语文下册周练九参考答案
一、基础知识及运用(略)
二、课内文言(略)
三、课外阅读
(一)现代文阅读
牵着母亲过马路
1、(1)看到儿子偕妻儿回家看望自己。(2)觉得儿子懂得了事理。
2、‚我‛看到一个多么熟悉的动作。
3、(1)陪母亲买菜。(2)听母亲诉说。(3)牵母亲过马路。
4、对比手法。突出了母亲爱子的感情之深。
5、B6、(1)母亲牵着‚我‛的小手过马路和‚我‛牵着母亲过马路这两次牵手。(2)要孝敬老人、父母,弘扬中华民族的传统美德。
(二)文言文阅读
鲍子难客译文
齐国姓田的(贵族)出行前在厅堂设宴祭祀路神,(一起吃饭的)幕僚有上千人。宴席上有进献鱼和大雁 的,姓田的看了,于是感叹道:‚老天对民众很宽厚啊!生长五谷,孕育鱼和鸟,用来给我们享用。‛所有食客附和。一位姓鲍的人的儿子,年龄12岁,也在场坐着,进言道:‚不是您说的那样。天地万物和我们人类一同生存,种类不同而已。种类没有什么贵贱之分,只是因为大小、智力不同而互相制约,互相成为食物,并不是为了给谁吃而生存的。人类获取可以吃的东西吃,难道是天为了人们而孕育它们吗?况且蚊虫叮咬(人的)皮肤,虎狼吃肉,难道是为了蚊虫而孕育出人、为了虎狼而孕育有肉的动物了吗?‛注释:1.田氏:齐国姓田的(贵族)。2.祖:古人出远门设宴祭路神叫‚祖‛。3.食客:战国时期投靠在贵族门下有一技之长的人。4.蚋:一种吸血的小虫。5.囋:叮咬。6.非相
为而生:不是为了对方的生存而生存的。7.殖:种植,使......繁衍生长。8.和:附和。
9.类:同类。
习题答案:①附和 ②都③一同 ④相似
2、①老天爷对百姓有恩德啊!② 不像您所说的,或您说的不对③ 仅仅因为力量大小有别、智慧高低不同而互相制约。
3、反驳,责怪对方。文章主旨: 本文告诉我们做人要厚道,不要过于自我,认为世间一切皆为自己而生。
第四篇:第二周首字母训练2篇
Have you ever had a day w__1__ everything seemed to go wrong, and nothing seemed to go right? Not too long ago I was having one of those days.I was disappointed and sad.I told it to my mother, h__2__ for some pity.Instead, she said, “I heard Jamie was having a difficult day too.Why don’t you make her some cookies and we’ll take t__3__ to her this afternoon?”
I didn’t r__4__ want to, but I decided that I didn’t want to go back to my other problems just yet.I made the cookies and put it on a little plate.Then I made a card with a sunflower on it and wrote a small note.That afternoon we c__5__ at my friend’s house.I went to the door and rang the bell.Soon, Jamie came to the door and looked at me in surprise for the u__6__ visit.Before she could say anything, I rushed, “I heard you were having a h__7__ day and decided to bring you something.I hope your day goes better.” The look that came over Jamie’s face was one that I could n__8__ put into words.It was as if a darkened sky was suddenly lit up with the golden rays of the sun;because of that small act, her day was brightened.I got back into the car and for some amazing r__9__, I felt a lot better myself.That day I e__9__ the truth that James Barrie attempted to describe, “Those who bring sunshine to the lives of others cannot keep it from themselves.”
People are not perfect, as a matter of fact, we human beings are far from perfect.Everyone makes m__1__ in their lives.Things happen and most of the time, there usually isn’t much time l__2__ for you to consider what to do with this.E__3__ you are given a lot of time, your judgment can still be wrong.After all, you may not have all the n information to make a right __4__decision.Are you ever trying to make up for a silly choice you’ve made? Anyone is s__5__ to make up for his mistakes.Examine your past life choices, you might see w__6__ you went wrong, or come to realize that you should have taken a different way.You might wonder how you could have done such a thing.There are two important things in deciding w__7__ you can actually make up for your mistakes.The first one is to be honest.Do you really feel bad for your fault? Do you t__8__ know that you should have made a different choice?
If that is the case, the second factor lies in the hands of the person, who needs to f__9__ you.Have a chat with him or her.Tell him or her you’re sorry, go on to explain that you sincerely want to make things right.If you can do that, you might find that the unpleasant experiences tend to disappear.What’s more, mistakes can be valuable by learning from them and passing on advice to others.We are not about to p__10__ each other for our mistakes, and we can’t always make up for past mistakes, but we can learn from them, taking the lessons with us as we journey to a brighter tomorrow.
第五篇:《分式》周周练
《分式》周周练(1)
班级:姓名:1.下列各式中,xy3aax,,,3b2x111121,xy,; 2xy2x2x3
属于分式的个数为()A、5个;B、4个;C、3个;D、2个; 2.人体中成熟的红细胞的平均直径为0.0000077
米,用科学记数法表示为()mmxyy
1B、1m33x22
xabx9b3b
C、D、
ybay6a32a1
12x
11.当x __________时分式有意义。
12x
x1
12.若分式的值为零,则x的值为.
x1x29
13.分式当x _____时分式的值为零。
x3 A、A、7.7105
米;B、77106
米;C、77105
米;D、7.7106
米;
3.将分式x2
xy
中的x、y的值同时扩大2倍,则
扩大后分式的值()A、扩大2倍;B、缩小2倍;C、保持不变;D、无法确定;
4.若把分式xy
2xy
中的x和y都扩大3倍,那么分
式的值()A、扩大3倍B、不变C、缩小3倍D、缩小6倍 5.分式
中,最简分式有()
A、1个; B、2个; C、3个;D、4个 6.已知
ab34,ba
b()
A、43 ;B、1
;C、14;D、13
7.下列约分,结果正确的是()
A.x6xmxx3
;B.m2xnn
C.x2y2xyxy ;D.xy
xy
1
8.解方程
3x2x
2x4时,去分母后得()A.3x4(x2)B.3x4(x2)C.3(2x)x(x2)4D.3x4
9.下列各式正确的是()
axa
1A、bx
b1
B、yxyx2C、nnannmma,a0D、m
ama
10.下列约分正确的是()
若分式x3
x3的值为零,则x;
14.①3a
5xy
10axy,(a0)②a21a24
。15.已知当x=-2时,分式
无意义;x=4时,分式值为0.则a+b=______. 16.若(a2)0
1,则a必须满足的条件是; 17.用科学计数法表示-0.000003974 =; 18.分式
xy2xy,y
xy3x
2,6xy2的最简公分母 为; 19.计算:[-2-3
-8-1
×(-1)-2
] ×(1)2
(22)0
20..观察下列各式:1
11121223121
;13411
34
;,(1)猜想它的规律,把1n(n1)表示出来;解:
n(n1)
(2)用你得到的规律,计算:
12161121
n(n1),并求出当n24时代数式的值;
解: