周周练11

1．下列词语中加点字的读音有误的一项是( )A．喝．(hâ)彩剜．心(wān)彤．云(tïng) 央浼．(měi)B．塑．(sù)造角隅．(yú)歇憩．(qì) 睨．视(ní)C．讥诮．(qiào) 怂．恿(sǒng)滑稽．(jī) 撮．合(cuō)D．娇嗔．(chēn) 辗轧．(yà)颤．栗(zhàn) 蠕．动(rú)【答案】B(“睨”音为nì。

)2．下列词语中加点的字，读音全部正确的一组是( )A．咬文嚼．字(juã)令人神往．(wǎnɡ)落入下乘．(chãnɡ)一蹴．而就(cù)B．数．见不鲜(shuî) 锱铢必较．(jiǎo)举不胜．举(shēnɡ) 一言难尽．(jìn)C．一字之差．(chā) 轻鸢．剪掠(yuān)清沁．肺腑(qìn) 窸窣．．飘零(xīsū)D．遥思远怅．(chànɡ) 眉眼颦．蹙(pín)垂涎．三尺(yán) 得鱼忘筌．(quán)【答案】C(A项“嚼”读“jiáo”；B项“较”读“jiào”，“胜”读“shâng”；D 项“涎”读“xián”。

)3．下列词语的书写有误的一组是( )A．消耗庇佑朔风碎琼乱玉B．祈祷谗言辖制战战兢兢C．干躁蚱蜢抿嘴呐喊助威D．盘旋皱褶磨蹭撼天动地【答案】C(干躁→干燥。

)4．下列词语中没有错别字的一项是( )A．涵义蕴藉注消酩酊大醉B．含糊烂调疏朗自鸣得意C．因缘圆晕干躁回肠荡气D．啰嗦默契叫嚣深恶痛绝【答案】D(A项“注消”应为“注销”，B项“烂调”应为“滥调”，C项“干躁”应为“干燥”。

)A．围绕林冲的遭遇，课文情节的展开张弛有致、波澜起伏，反映了林冲性格思想的变化过程。

B．中国古代小说有其自身的特点，重故事，重描写，与西方小说和现代某些中国小说重心理刻画不同。

入舵市安恙阳光实验学校周考卷十一 Unit 1 ~ Unit 3(Book 6)本试卷满分120分；答题时间100分钟。

第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

AMoods, say the experts, are emotions that tend to become fixed, in influencing one’s outlook for hours, days or even weeks. That’s great if your mood is a pleasant one, but it will be a problem if you are sad, anxious, angry or simply lonely.Perhaps one of the best ways to deal with such moods is to talk them out: sometimes, though, there is no one to listen. Modern pharmacology (药理学) offers an abundance of antidepressants and anti-anxiety drugs. What many people don’t realize, however, is that scientists have discovered the effectiveness of several non-drug approaches to make you loose from an unwanted mood. These can be just as useful as drugs, and have the added benefit of being nonpoisonous. So next time you feel out of sorts, don’t head for the drug store-try the following approach. Of all the mood-altering self-help techniques, aerobic (有氧健身的) exercise seems to be the most efficient cure for a bad mood. “If you could keep the exercise, you’d be in high spirits,” says Kathryn Lance, author of Running for Health and Beauty. There is obviously a link between physical activity and mood changes.Researchers have explained biochemical and various other changes that make exercise compare favorable to drugs as a mood-raiser. Physical exertion (努力) such as housework, however, does little, probably because it is not intensive enough, and people usually do it unwillingly. The key is aerobic exercise-running, cycling, walk, swimming or other repetitive and sustained a session three to five times a week.1. he problem of talking bad moods out is that _____.A. it proves to be ineffectiveB. sometimes there is noaudienceC. it reveals people’s privacyD. it proves to be a badnonpoisonous2. The underlined word “ antidepressants” in Paragraph 2 Probably means____.A. a drug that relieves depressB. a drug that makespeople sadC. a drug that gives people better sleepD. a drug that isnonpoisonous3. What does the author prefer as a mood-raiser?A. Modern drugs.B. Talking them out.C. Aerobic exercise.D.housework..4. The minimum (最少) length of aerobic exercise a week is ______ according to the passage.A.15 minutesB. 60 minutesC. 100 minutesD. 160 minutes 1．B 细节理解题。

第十一周阅读训练月日用时：得分：卷面书写：【诗歌鉴赏】（6分）得分：阅读下面的古诗，完成1——2题送道标上人归南岳 (唐)刘长卿悠然倚孤棹，却忆卧中林。

江草将归远，湘山独往深。

白云留不住，渌水去无心。

衡岳千峰乱，禅房何处寻。

1. 下列对这首诗的赏析，不正确的一项是（）（3分）A. 上人即高僧；棹为划船工具，代指船；南岳衡山，为五岳之一。

B. 首联写道标上人飘然远游之中怀想林中高卧。

暗示他即将归去。

C. 颔联点出道标上人归去之地，江岸青草如作者的离愁伴他远行。

D. 本诗前四句描写景物，后四句感时抒怀，描写与抒情紧密关联。

2. 诗的最后两句有何含意？请简要分析。

（3分）【文言文阅读】（12分）得分：阅读下面的文言文，完成3——6题石奢者，楚昭王相也。

坚直廉正，无所阿避。

行县①，道有杀人者，相追之，乃其父也。

纵其父而还自系焉。

使人言之王曰：“杀人者，臣之父也。

夫以父立政②，不孝也；废法纵罪，非忠也；臣罪当死。

”王曰：“追而不及，不当伏罪，子其治事矣③。

”石奢曰：“不私其父，非孝子也；不奉主法，非忠臣也。

王赦其罪，上惠④也；伏诛而死，臣职也。

”遂不受令，自刎而死。

李离者，晋文公之理也。

过听⑤杀人，自拘当死。

文公曰：“官有贵贱，罚有轻重。

下吏有过，非子之罪也。

”李离曰：“臣居⑥官为长，不与吏让位⑦；受禄为多，不与下分利。

今过听杀人，傅⑧其罪下吏，非所闻也。

”辞不受令。

文公曰：“子则自以为有罪，寡人亦有罪耶？”李离曰：“理有法，失刑则刑，失死则死。

公以臣能听微决疑⑨，故使为理。

今过听杀人，罪当死。

”遂不受令，伏剑而死。

（《史记·循吏列传》【注解】①行县：出行属县。

②以父立政：以惩治父亲来树立政绩。

③子其治事矣：你还是去治理国事吧，④惠：恩惠.⑤听：偏听，偏信。

⑤居官：担当的官职。

⑦不与吏让位：不曾把官位让给下属。

⑧傅：推诿。

④听微决疑：听察细微隐情，决断疑难案件。

3. 下列各组句子中，加点词语解释正确的一项是（）（2分）A. 纵．其父而还自系焉（纵：越过）B. 不私．其父，非孝子也（私：偏袒）C. 过．听杀人，自拘当死（过：经过）D. 辞．不受令（辞：言辞）4. 下列选项中加点文言虚词的意思和用法与例句相同的一项是（）（3分）例句：纵其父而．还自系焉A. 相委而．去B. 人不知而．不愠C. 面山而．居D. 生于忧患而．死于安乐也5. 用现代汉语翻译文中画横线的句子。

一、语言文字运用（19分）1．下列词语中加点的字，每对读音都不相同的一组是（3分）A．奶酪．/烙．饼笑靥．/液．化气角．逐/咬文嚼．字B．桎梏．/痼．疾圈．养/入场券．飙．车/彪．炳青史C．沏．茶/蹊．跷整饬．/白炽．灯船舷．/扣人心弦．D．盗跖．/拓．本泊．车/舶．来品朔．风/媒妁．之言2．下列各组词语中加点的字的读音，全部与所给注音相同．．的一组是（3分）A.辍．(chuî)学搭讪．(shàn) 横．(hâng)财间不容发．(fā)B.坎坷．（kě）咋．(zà)舌颀．(qí)长蒙．(mãng)头盖脸C.炮．(páo)烙同侪．(chái) 哂． (shěn) 笑戎马倥偬．(zǒng)D.恸．(tîng)哭框．(kuāng)架铁箍．(gū) 舐．(shì)犊情深3．下列词语中，没有错别字的一组是（3分）A．决窍晤谈功亏一溃立身处世B．惊蛰涵养胸无城府光风济月C．挤兑揶揄靡靡之音峨冠博带D．珐琅狼籍崭露头脚惠质兰心4．下列各句中，没有语病的一句是（3分）A．我国需要从法规上对保护海洋和海岸带生态环境予以规范，并借鉴发达国家的经验，有效防止海洋石油污染事件不再发生，保护、治理好海洋生态环境。

B．优秀的科普图书，不仅能够培养孩子们对科学的兴趣，传递科学思想和科学精神，而且能够让孩子们掌握知识，扩大孩子们的知识面。

C．21世纪的海洋产业前景不可限量，江苏省盐城市沿海资源丰富、生态独特，应该致力于建成国家级海洋生物产业生产、研发和服务基地。

D．全国第一个“价格诚信城市”创建仪式昨天在张家港举行，作为江苏省首个试点城市，张家港有望在未来三年内建成全国首个价格诚信城市。

5．下列各句没有语病的一项是（3分）A. 8月15日，日本在东京举行庄重仪式纪念二战投降67周年，与此同时，围绕领士纠纷出现的紧张气氛和对日本战时行为的仇恨情绪在邻国再度高涨。

1．下列词语中加点字的读音有误的一项是( )A．喝．(hâ)彩剜．心(wān)彤．云(tïng) 央浼．(měi)B．塑．(sù)造角隅．(yú)歇憩．(qì) 睨．视(ní)C．讥诮．(qiào) 怂．恿(sǒng)滑稽．(jī) 撮．合(cuō)D．娇嗔．(chēn) 辗轧．(yà)颤．栗(zhàn) 蠕．动(rú)2．下列词语中加点的字，读音全部正确的一组是( )A．咬文嚼．字(juã)令人神往．(wǎnɡ)落入下乘．(c hãnɡ) 一蹴．而就(cù)B．数．见不鲜(shuî) 锱铢必较．(jiǎo)举不胜．举(shēnɡ) 一言难尽．(jìn)C．一字之差．(chā) 轻鸢．剪掠(yuān)清沁．肺腑(qìn) 窸窣．．飘零(xīsū)D．遥思远怅．(chànɡ)眉眼颦．蹙(pín)垂涎．三尺(yán) 得鱼忘筌．(quán)3．下列词语的书写有误的一组是( )A．消耗庇佑朔风碎琼乱玉 B．祈祷谗言辖制战战兢兢C．干躁蚱蜢抿嘴呐喊助威 D．盘旋皱褶磨蹭撼天动地4．下列词语中没有错别字的一项是( )A．涵义蕴藉注消酩酊大醉 B．含糊烂调疏朗自鸣得意C．因缘圆晕干躁回肠荡气 D．啰嗦默契叫嚣深恶痛绝5．下列各句中，有语病的一项是( )A．围绕林冲的遭遇，课文情节的展开张弛有致、波澜起伏，反映了林冲性格思想的变化过程。

B．中国古代小说有其自身的特点，重故事，重描写，与西方小说和现代某些中国小说重心理刻画不同。

C．从性格、行为上讲，别里科夫封闭、怀旧、胆小、多疑，但他又无时无刻极力维护现行的社会秩序。

D．《边城》以翠翠的爱情悲剧为线索，淋漓尽致地表现了湘西地方的人性美和风情美。

6．下列各句中，加点的成语使用恰当的一句是( )A．现在，成为“作家”当个“文化人”又成了那些歌星、影星们新的追求，然而他们所出的书，内容粗浅，文法不通，实在让人不忍卒读．．．．。

小学一年级下学期苏教版周周练习题及答案（1-11周）第一周一、根据要求填空。

1.在○里填“＞”“＜”或“＝”。

14-8 ○7 11-7 ○ 3 8+6 ○1517-9 ○9 17-8 ○8 12-7 ○ 62.填数墙。

二、选择题。

3.用5、14、9三个数可以组成（）道加减法算式。

A.4B.3C.2三、计算。

4.看谁算得又对又快。

10-8= 16-8= 11-7= 12-8=17-8= 10-7= 14-8= 11-8=13-8= 15-7= 14-7= 17-7=16-7= 12-7= 13-7= 18-8=5.击鼓传花。

四、解决问题。

6.停车场原来停了15辆车，开走了（）辆，还剩（）辆。

7.妈妈买红扣子18个，白扣子9个,黑扣子4个。

(1)红扣子比白扣子多多少个?(个)(2)黑扣子比白扣子少多少个?(个)8.我们一共收了16个胡萝卜,分给朋友9个,还剩多少个?9.一队小朋友从左往右依次报数，明明报的是8，红红报的是14。

明明和红红之间一共有多少个小朋友？参考答案一、1. ＜＞＜＜＞＜2. 3 1 5 1 9 9 6 0 0二、3. A三、4. 2 8 4 4 9 3 6 3 5 8 7 10 9 5 6 105. 4 11 3 10 15 7 17 9四、6. 8 7 15-8=77. （1）18 - 9 = 9(个) 答：红扣子比白扣子多9个。

（2）9 - 4 = 5(个) 答：黑扣子比白扣子少5个。

8.16 - 9 = 7(个) 答：还剩7个。

9.14-8-1=5（个）答：明明和红红之间一共有5个小朋友。

第二周一、根据要求填空。

1.算一算，填一填。

2.在○里填“＞”“＜”或“＝”。

11-2○9 6○13-4 11○9-2 14○12-318○19-5 9○12-4 14-7○6 11-4○83.先将长方形涂成红色，正方形涂成绿色，圆涂成黄色，然后数一数，再填一填。

长方形有( )个，正方形有( )个，圆有( )个。

周周练11一、选择题1．下面语段中加点字的读音完全正确的一项是（）每次要在小鸟身上系．上锡环以便辨识，就要伤许多脑筋。

每次我把小鸟从巢．里取出，总不免被成年的大鸟撞．见，不一会儿，我的身边就飞满了吵嚷．愤怒的大鸟。

A．xì cháo zhuàng rangB．jì jiāo chuàng rǎngC．jì cháo zhuàng rangD．xì jiāo chuàng rāng【答案】C“系”不要读成“xì”。

“巢”：鸟窝。

读“cháo”。

“撞”：冲打，碰击。

读“zhuàng”。

故选C。

2．下列各句中加点词语书写完全正确的一项是（）A．它躺在露台板上晒太阳，态度很安祥．．，嘴里好象还在吃着什么。

B．它只是毫无生意地、懒惰．．地躺着。

．．地、郁闷C．它马上变得活泼而神彩奕奕．．．．起来，并且对我恋恋不舍。

D．可可伸开了翅膀迟疑了一会儿，然后潋翼．．俯冲而下，只一下就停在我伸出的手臂．．上了。

【答案】BA.安祥——安详。

C.神彩奕奕——神采奕奕。

D.潋翼——敛翼。

故选B。

3．下列语句中，没有．．语病的一项是（）A．良好的语文素养是学生学好其他课程的基础，也是学生全面发展和终身发展的基础。

B．能不能战胜自己思想上的弱点，是一个人在事业上成功的关键。

C．在学习中，我们应注意培养自己观察问题、解决问题和分析问题的能力。

D．有关部门最近发出通知，要求各地在国庆期间严防安全不出现问题。

【答案】AB.两面对一面，把“不能”去掉。

C.语序不当，观察问题、分析问题和解决问题的能力。

D.滥用否定词，把“不”字去掉。

故选A。

4．下面说话最得体的一项是（）A．“老师，”王东站起来，“这道题我还不懂，再给我讲一遍！”B．小姚说：“李老师昨天病了，住在医院里。

我们应该关怀关怀他，下午就去看看他。

第11周合理分组一、知识要点小朋友，给你几个数，要求你在加减运算的基础上，把所给的几个数进行合理分组，填入已列好的算式中，使算式成立。

“合理分组，巧填算式”是一种有趣的数学问题。

小朋友们要善于观察、分析所给的数，找出其中的规律，在此基础上，大胆地进行尝试。

二、精讲精练【例题1】把1、2、3、4这四个数分别填入□（每个数只能用一次），使等式成立。

□＋□＝□＋□【思路导航】仔细观察题目要求“□＋□＝□＋□”，左边两个数的和与右边两个数的和相等。

那么就要将1、2、3、4分成两组，使这两组数的和相等。

由此可看出1、4分为一组，2、3分为一组，两组的和都是5。

这样□里的数就可以填出来了。

小朋友，动手试一试吧！可以这样填：1＋4＝2＋3；也可以这样填：3＋2＝4＋1。

【温馨提示】认真观察所给的数，找出它们的特点，再将它们合理分组，使这两组数的和相等。

填写的方法可有多种，如题目无要求，只需填一种即可。

练习1：1.把2、3、4、5这四个数分别填入下面的□里，使等式成立。

□＋□＝□＋□2＋5＝3＋42.把2、4、6、8这四个数分别填入下面的□里，使等式成立。

□＋□＝□＋□2＋8＝4＋63.把3、5、7、1这四个数分别填入下面的□里，使等式成立。

□＋□＝□＋□3＋5＝7＋199□－□＝□－□【思路导航】把所给的四个数分成两组，使分得的两组数中的两数之差相等，从而组成等式。

（1）把3、4、5、6这四个数分成这样的两组：第一组：4、3 第二组：6、5每组数中两数之差为1，可组成这样的等式：4－3＝6－5。

（2）还可以把这四个数分成这样的两组：第一组：5、3 第二组：6、4每组数中两数之差为2，可组成这样的等式：5－3＝6－2。

【温馨提示】认真观察所给的数，找出它们的特点，再将它们合理分组，使这两组数的差相等。

填写的方法可有多种，如题目无要求，只需填一种即可。

练习2：1.把5、6、7、8这四个数分别填入□（每个数只能用一次），使等式成立。

高考真题周周练（11）阅读理解AThe oldest and most common source (来源) of renewable energy known to man, biomass is one of the most important forms of energy production in the United State s and elsewhere. Since such a wide variety of biomass materi als is everywhere — from trees and grasses to agricultural and city-life wastes — biomass promises to play a continuing role in providing power and h eat for millions of people around the world.According to the Union of ConcernedScientists (UCS), biomass is a kind of renewable energy sour ce that produces no carbon dioxide (二氧化碳), because the energy it contains comes from the sun. Whe n plant matter isburned, it gives off the sun's energy. In this way, biomass ser ves as a sort of natural battery (电池) for storing the sun's energy. As long as biomass is produc ed continuously — with only as much grown as is used — the “battery” lasts forever.According to the Energy Information Administration, biomas s has been one of the leading renewable energysources in the for several years running through 2007, maki ng up between 0.5 and 0.9 percent of the nation's total electri city supply. In 2008 — although the numbers aren't all in yet — wind power probably took over first place because of the ra pid development of wind farms across the country.Producing power from biomass helps reduce some 11 milli on tons of carbon dioxide each year. Some homeowners also try to make their own heat by using biomass materials. Such practice may save homeowner's money, but it also produces a lot of pollution. So, the best way is to encourage power plan ts to use it.21. Why is biomass considered as “a sort of natural battery”?A. It burns merely plant matter.B. It keeps producing electric ity.C. It stores the energy from the sun.D. It produces zero carb on dioxide.22. We learn from the text that in 2008 ______.A. wind power would be the leader of renewable energyB. there was a rapid growth of electricity productionC. biomass might become the main energy sourceD. 0.5~0.9% of power supply came from biomass23. Why does the author encourage power plants to use biom ass?A. To prevent the waste of energy.B. To increase produc tion safety.C. To reduce pollution.D. To save money.24. Where does the text probably come from?A. A research plan.B. A science magazine.C. A book review.D. A business report.BSome people will do just about anything to save money. An d I am one of them. Take my family's last vacation. It was my six-year-old son's winter break from school, and we were heading home from after a weeklong trip. The flight was overbooked, and Delta, the airl ine, offered us $400 per person in credits to give up our seats and leave the next day. I had meetings in , so I had to get bac k. But that didn't mean my husband and my son couldn't stay.I took my nine-month-old and took off for home.The next day, my husband and son were offered more cred its to take an even later flight. Yes, I encouraged — okay, ord ered — them to wait it out at the airport, to "earn" more DeltaDollars. Our total take: $1,600. Not bad, huh?Now some people may think I'm a bad mother and not such a great wife either. But as a big-time bargain hunter, I know the value of a dollar. And these d ays, a good deal is something few of us can afford to pass up. I've made a living looking for the best deals and exposing (揭露) the worst tricks. I have been the consumer reporter of NB C's Todayshow for over a decade. I have written a couple of books incl uding one titled Tricks of the Trade: A Consumer Survival Guide. And I really do what I believ e in.I tell you this because there is no shame in getting your mo ney's worth. I'm also tightfisted when it comes to shoes, cloth es for my children, and expensive restaurants. But I wouldn't hesitate to spend on a good haircut. It keeps its shape longer, and it's the first thing people notice. And I will also spend ona classic piece of furniture. Quality lasts.25. Why did Delta give the author's family credits?A. Their flight had been delayed.B. They had early bookin gs.C.They took a later flight. D. Their flight had been cancelle d.26. What can we learn about the author?A. She is very strict with her children.B. She seldom makes a compromise.C. She rarely misses a good deal.D. She is interested in cheap products.27. What does the author do?A. She's a teacher.B. She's a housewife.C. She's a media person.D. She's a businesswoman.28. What does the author want to tell us?A. How to expose bad tricks.B. How to reserve airline sea ts.C. How to spend money wisely.D. How to make a busines s deal.完形填空Joe Simpson and Simon Yates were the first people to clim b the West Face of the Siula Grande in the Andes mountains. They reached the top 41 , but on their way back conditionswere very 42 . Joe fell and broke his leg. They both knew th at if Simon 43 alone, he would probably get back 44 . Bu t Simon decided to risk his 45 and try to lower Joe down th e mountain on a rope (绳).As they 46 down, the weather got worse. Then another 47 occurred. They couldn't see or hear each other and, 48 , Simon lowered his friend over the edge of a precipice (峭壁). It was 49 for Joe to climb back or for Simon to pull him up. Joe's 50 was pulling Simon slowly towards the precipic e. 51 , after more than an hour in the dark and the icy cold, Simon had to 52 . In tears, he cut the rope. Joe 53 into a huge crevasse (裂缝) in the ice below. He had no food or water and he was in te rrible pain. He couldn't walk, but he 54 to get out of the crev asse and started to 55 towards their camp, nearly ten kilom eters 56 .Simon had 57 the camp at the foot of the mountain. He thought that Joe must be 58 , but h e didn't want to leave 59 . Three days later, in the middle of the night, he heard Joe's voice. He couldn't 60 it. Joe was t here, a few meters from their tent, still alive.41. A. hurriedly B. carefullyC. successfullyD. early42. A. difficult B. similar C. special D. norma l43. A. climbed B. worked C. rested D. conti nued44. A. unwillingly B. safelyC. slowlyD. regretfully45. A. fortune B. time C. health D. life46. A. lay B. settled C. went D. looked47. A. damage B. storm C. changeD. trouble48. A. by mistake B. by chance C. by choiceD. by luck49. A. unnecessary B. practical C. importantD. impossible50. A. height B. weight C. strengthD. equipment51. A. Finally B. Patiently C. Surely D. Quic kly52. A. stand back B.take a rest C. make a decision D. hold on53. A. jumped B. fell C. escaped D. backed54. A. managedB. plannedC. waitedD. hoped55. A. run B. skate C. move D. march56. A. around B. away C. above D. along57. A. headed for B. traveled toC. left forD. returned to58. A. dead B. hurt C. weakD. late59. A. secretly B. tiredly C. immediatelyD. anxiously60. A. find B. believe C. make D. accept单词拼写1. Lisa, I didn't ______ (认出) you -- you've had your hair cut!2. I usually just have a ______ (三明治) for lunch.3. Mr. White announced that he would go to in ______ (二月).4. The story was first written in English and later ______ (翻译) into Chinese.5. The village children like to go ______ (游泳) in the nearby river.6. One of our ______ (邻居) kept a very beautiful garden.7. The English teac her gives the class a ______ (听写) almost every day.8. David turned and walked off in the ______ (相反) direction.9. I suggest that we have ______ (定期) meetings.10. Rose rushed ______ (向楼下) to answer the door.翻译1. 我习惯睡前听点轻音乐。

八年级数学上册周周练及答案全册一、简介八年级数学上册周周练及答案全册是为八年级学生编写的一套数学学习辅助材料。

本文档旨在为学生提供全册周周练习题及其答案，帮助学生巩固和提升数学知识和解题能力。

二、周周练习题第一周练习题1.求下列式子的值：a)$4 + 7 \\times 2 =$b)$\\frac{3}{4} \\times 2 + \\frac{2}{5} =$c)$\\frac{1}{3} + \\frac{1}{4} - \\frac{1}{6} =$2.简化下列代数表达式：a)x+2x+3x=b)2(x+x)−3x=c)$(2a + 3b) \\cdot 4 =$3.解下列方程：a)2x+5=15b)$\\frac{x}{4} = 6$c)3x+2=5x−3第二周练习题1.计算下列式子的值：a)$\\frac{3}{5} \\times \\frac{4}{9} +\\frac{2}{3} \\times \\frac{1}{2} =$b)$(\\frac{1}{2})^3 \\times (\\frac{1}{2})^{-2}=$c)$\\sqrt{16} + \\sqrt{25} =$2.求下列代数式的值：a)3x−2，当x=4时b)2x2+x−1，当x=−3时c)x3−3x2+2x，当x=1时3.解下列方程组：\\end{cases}$b)$\\begin{cases} 3x - 2y = 1 \\\\ x + y = 4\\end{cases}$c)$\\begin{cases} 2x - y = 3 \\\\ 3x + 4y = 8\\end{cases}$第三周练习题1.计算下列式子的值：a)$(\\frac{5}{8})^2 \\div (\\frac{7}{10})^3 =$b)$\\frac{3}{5} \\div (\\frac{2}{3} +\\frac{1}{4}) =$c)$\\sqrt{36} - \\sqrt{49} =$2.求下列代数式的值：a)2x2−3xx+5，当x=2,x=3时b)$\\frac{(a-b)^2}{a^2 - ab + b^2}$，当x=3,x=1时c)3x3+2x2−x，当x=−1时3.解下列方程组：\\end{cases}$b)$\\begin{cases} 2x - 3y = 1 \\\\ 4x + y = 5\\end{cases}$c)$\\begin{cases} x + 2y = -3 \\\\ 3x + 4y = 2\\end{cases}$三、答案第一周练习题答案1.求下列式子的值：a)$4 + 7 \\times 2 = 4 + 14 = 18$b)$\\frac{3}{4} \\times 2 + \\frac{2}{5} =\\frac{6}{4} + \\frac{2}{5} = \\frac{12}{8} +\\frac{2}{5} = \\frac{15}{10} + \\frac{4}{10} =\\frac{19}{10} = 1.9$c)$\\frac{1}{3} + \\frac{1}{4} - \\frac{1}{6} =\\frac{2}{6} + \\frac{3}{12} - \\frac{2}{12} =\\frac{4}{12} + \\frac{3}{12} - \\frac{2}{12} =\\frac{5}{12}$2.简化下列代数表达式：a)x+2x+3x=6xb)2(x+x)−3x=2x+2x−3x=2x−xc)$(2a + 3b) \\cdot 4 = 8a + 12b$3.解下列方程：a)2x+5=15解得x=5b)$\\frac{x}{4} = 6$解得x=24c)3x+2=5x−3解得 $x = \\frac{5}{2}$第二周练习题答案1.计算下列式子的值：a)$\\frac{3}{5} \\times \\frac{4}{9} +\\frac{2}{3} \\times \\frac{1}{2} = \\frac{12}{45} +\\frac{2}{6} = \\frac{12}{45} + \\frac{15}{45} =\\frac{27}{45} = \\frac{3}{5}$b)$(\\frac{1}{2})^3 \\times (\\frac{1}{2})^{-2}= \\frac{1}{8} \\times \\frac{1}{(\\frac{1}{2})^2} =\\frac{1}{8} \\times 4 = \\frac{4}{8} = \\frac{1}{2}$c)$\\sqrt{16} + \\sqrt{25} = 4 + 5 = 9$2.求下列代数式的值：a)3x−2，当x=4时解得 $3 \\times 4 - 2 = 12 - 2 = 10$b)2x2+x−1，当x=−3时解得 $2 \\times (-3)^2 + (-3) - 1 = 2 \\times 9 -3 - 1 = 18 - 3 - 1 = 14$c)x3−3x2+2x，当x=1时解得 $1^3 - 3 \\times 1^2 + 2 \\times 1 = 1 - 3 + 2 = 0$3.解下列方程组：a)$\\begin{cases} 2x + 3y = 7 \\\\ 4x - 5y = -2\\end{cases}$解得 $x = \\frac{19}{17}$, $y = \\frac{1}{17}$b)$\\begin{cases} 3x - 2y = 1 \\\\ x + y = 4\\end{cases}$解得 $x = \\frac{9}{5}$, $y = \\frac{11}{5}$c)$\\begin{cases} 2x - y = 3 \\\\ 3x + 4y = 8\\end{cases}$解得 $x = \\frac{20}{17}$, $y =\\frac{31}{17}$第三周练习题答案1.计算下列式子的值：a)$(\\frac{5}{8})^2 \\div (\\frac{7}{10})^3 =\\frac{25}{64} \\div \\frac{343}{1000} =\\frac{25}{64} \\times \\frac{1000}{343} =\\frac{25000}{21952}$b)$\\frac{3}{5} \\div (\\frac{2}{3} +\\frac{1}{4}) = \\frac{3}{5} \\div \\frac{8}{12} =\\frac{3}{5} \\times \\frac{12}{8} = \\frac{9}{10}$c)$\\sqrt{36} - \\sqrt{49} = 6 - 7 = -1$2.求下列代数式的值：a)2x2−3xx+5，当x=2,x=3时解得2(2)2−3(2)(3)+5=8−18+5=−5b)$\\frac{(a-b)^2}{a^2 - ab + b^2}$，当x=3,x=1时解得 $\\frac{(3-1)^2}{3^2 - 3(3)(1) + (1)^2} = \\frac{2^2}{9 - 9 + 1} = \\frac{4}{1} = 4$c)3x3+2x2−x，当x=−1时解得3(−1)3+2(−1)2−(−1)=−3+2+1= 03.解下列方程组：a)$\\begin{cases} 3x + 2y = 4 \\\\ 5x - 3y = 7\\end{cases}$解得 $x = \\frac{23}{19}$, $y = \\frac{2}{19}$b)$\\begin{cases} 2x - 3y = 1 \\\\ 4x + y = 5\\end{cases}$解得 $x = \\frac{17}{11}$, $y = \\frac{9}{11}$c)$\\begin{cases} x + 2y = -3 \\\\ 3x + 4y = 2\\end{cases}$解得 $x = -\\frac{14}{5}$, $y = \\frac{11}{5}$四、总结本文档提供了八年级数学上册周周练习题及其答案，涵盖了多个知识点和题型，并且给出了详细的解题步骤和答案，帮助学生巩固和提升数学知识和解题能力。