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2021年高考数学第一轮复习 课后练习册子及其答案和详细解析

2021年高考数学第一轮复习 课后练习册子及其答案和详细解析
高考Байду номын сангаас复习课程--2021 年高 考数学第一轮总复习
强化练习题
目录
第 1 讲 集合与简易逻辑...........................................................................................................................- 1 第 2 讲 函数及其性质经典精讲 ...............................................................................................................- 2 第 3 讲 函数及其性质 2019 高考真题赏析 .............................................................................................- 3 第 4 讲 函数及其性质 2018 高考真题赏析 .............................................................................................- 4 第 5 讲 平面向量.......................................................................................................................................- 5 第 6 讲 三角函数与三角恒等变换经典精讲 ............................................................

高三语文新课标一轮复习课时作业8 Word版含解析.doc

高三语文新课标一轮复习课时作业8 Word版含解析.doc

课时作业八(时间:30分钟满分:30分)1.下面一段文字中画线的词语,有的必须删去,有的不能删去。

请把它们找出来,将序号写在相应的横线上。

为了①丰富农村文化生活,日前,市黄梅戏剧团将②派出由二十名青年演员组成的③演出队伍,奔赴大别山区进行④慰问演出。

演员们深入田间地头、乡村街道,敬老院、和⑤学校,为观众奉献了一个个精彩的⑥节目。

通过⑦演出拉近了青年演员与群众的距离,也使演员自己得到了很好的锻炼。

必须删去的:____________________________________________________ 不能删去的:____________________________________________________ 答案②⑤⑦①③2.下面是一位记者对接受采访的某著名作家之子说的一段开场白,其中有四处不得体,请找出来加以修改。

大家知道家父是一位著名的作家,作品广为流传,在文坛小有名气。

我在上中学时就读过他的不少作品,至今还能背诵其中的段落。

您是他老人家的犬子,能在百忙之中有幸接受我的采访,我对此表示感谢。

修改:①________改为________②________改为________③________改为________④________改为________解析“家父”是谦辞,对人称自己的父亲。

称对方的父亲应用敬辞“令尊”。

“小有名气”一般用于自谦,这里应用“很有名气”来表达敬仰之情。

“犬子”是谦辞,对人称自己的儿子,这里应改为“爱子”。

“有幸”是敬辞,用于表示自己很幸运,不能用于对方。

答案①“家父”改为“令尊”②“小有名气”改为“很有名气”③“犬子”改为“爱子”④“有幸”改为“抽空”3.下列句子画线部分表达得体的一项是()A.“抱歉打扰您了!我想跟您垂询一下如何解压,尽快消除心理阴影的问题。

”——记者小王采访心理学家张教授。

B.银行营业厅服务员对张小明说:“你想干什么?”——张小明来到银行营业厅,正选择要到哪个窗口办业务。

人教版高考语文一轮总复习课后习题 课后自主规范练案33 词语(包括熟语)

人教版高考语文一轮总复习课后习题 课后自主规范练案33 词语(包括熟语)

练案三十三词语(包括熟语)一、对点练1.依次填入下列横线处的词语,最恰当的一项是( )(1)真正的光明,绝不是永远没有黑暗的时候,只是永远不被黑暗罢了;真正的英雄,绝不是永远没有卑下的情操,只是永远不被卑下的情操操纵罢了。

(2)入夜,月色溶溶,水面,我们或坐在树下促膝畅谈,或坐在船上叩舷高歌,或立于小石桥上对月凝思。

(3)有一种人,他们敦厚老实,按书本办事,工作审慎认真。

乍看没什么可挑剔之处,还挺值得我们嘉许学习呢!A.掩蔽寥廓品行B.掩蔽辽阔品性C.掩饰寥廓品性D.掩饰辽阔品行2.依次填入下列横线处的词语,最恰当的一项是( )(1)中华民族历来英雄豪杰辈出、仁人志士云涌,他们以其英雄行为、英雄品格、英雄壮举,促进并激励我们团结一致、艰苦奋斗。

厚植于五千年中华文化的英模精神,是中华文化的特殊表现形式,是社会主义文化和红色文化的硬核,为各民族人民所接受、喜爱、。

(2)能力在掌握和运用知识的过程中形成,而具备一定的能力又能够使知识。

(3)泡水车由于存在种种危害,因此被二手车市场认定为事故车。

目前各二手车商都在积极应对,培训评估师,加大力度,诚信经营,避免泡水车进入二手车市场。

A.传诵增殖甄别B.传颂增值甄别C.传颂增殖鉴别D.传诵增值鉴别3.依次填入下列横线处的词语,最恰当的一项是( )(1)“法”是中国古代散文理论中一个重要的,反映出散文这一文体从确立其独立地位到实现成熟的文体形态的过程。

(2)仿品是陶瓷发展史中的一种特殊产品,即后代有意前代的作品,也叫仿古瓷。

高仿瓷作为目前收藏市场上的新宠,正受到越来越多的收藏者的关注。

(3)第一次庭审时,原告律师向法庭所作的,揭露了三年来原告在这起家庭暴力案件中遭受虐待的真相。

A.范畴仿照申诉B.范围仿造申诉C.范围仿照申述D.范畴仿造申述4.依次填入下面文段横线处的词语,最恰当的一项是( )春联是仅在春节这一特定时节张贴的对联,而对联还有其他种类,如婚联、寿联、挽联,以及为园林建筑的楹联等。

高考化学一轮总复习钠及其重要化合物课时训练题有答案

高考化学一轮总复习钠及其重要化合物课时训练题有答案

适用精选文件资料分享高考化学一轮总复习钠及其重要化合物课时训练题(有答案)第二章金属元素及其化合物第一节钠及其重要化合物23455-15-266-16-26-36-478答案题号 1一、单项选择题 1 .(2012?北京高考 ) 以下用品的有效成分及用途对应错误的是()ABCD用品有效成分 NaCl Na2CO3 Al(OH)3 Ca(ClO)2 用途做调味品做发酵粉做抗酸药做消毒剂 2.(2012? 北京高考 ) 以下解说实验现象的反应方程式正确的选项是 () A .切开的金属 Na裸露在空气中,光明表面逐渐变暗: 2Na+O2===Na2O2 .B向 AgCl 悬浊液中滴加 Na2S溶液,白色积淀变为黑色: 2AgCl+S2-===Ag2S↓+ 2Cl - C.Na2O2在湿润的空气中搁置一段时间,变为白色粘稠物 2Na2O2+2CO2===2Na2CO3+O2 D.向 NaHCO3溶液中加入过分的澄清石灰水,出现白色积淀:2HCO-3+Ca2++ 2OH-===CaCO3↓+ CO2-3+2H2O 3.已知钠能与水、乙醇等含有羟基 ( ―OH)的化合物反应,将钠投入以下溶液中,反应的激烈程度由强到弱的是() ①水②NaOH溶液③0.1 mol/L盐酸④0.1 mol/L FeCl3溶液⑤乙醇A.④③②①⑤B.④③①②⑤ C.③④①②⑤ D.①③④②⑤ 4 .(2012?广东月考)只用胶头滴管和试管经过两试剂的互滴,不可以区其余以下溶液( 浓度均为 0.1 mol/L)() A .NaAlO2和稀盐酸 B .NaHCO3和 Ca(OH)2C.NaOH和 Al2(SO4)3 D.HCl 和 Na2CO35.(2011?郑州质检 ) 等物质的量的 N2、O2、CO2混杂气体经过 Na2O2后,体积变为原体积的89( 同温同压 ) ,这时混杂气体中 N2、O2、CO2的物质的量之比为 ( ) A.3 41 B .3 32 C .6 73 D .6 9 0 5 题变式 5 -1.200 ℃时, 11.6 g CO2和 H2O的混杂物气体与足量的 Na2O2反应,反应后固体增添了g,则原混杂物的均匀摩尔质量是多少( ) A.5.8 B.11.6 C.23.2 D.46.4 5-2. 在必然条件下,使 CO和 O2的混杂气体 26 g 充分反应,所得混杂物在常温下跟足量的 Na2O2固体反应,结果固体质量增添14 g ,则原混杂气体中O2和 CO的质量之比是 () A .9 4 B .1 1C.7 6 D .6 7 6 .在必然温度下,向饱和的烧碱溶液中加入必然量的 Na2O2,充分反应后,恢复到本来的温度,以下说法中正确的选项是( ) A.溶液的 pH不变,有 H2放出 B .溶液的 pH增大,有 O2放出C.溶液中 c(Na+) 增大,有 O2放出 D.溶液中 Na+数量减少,有 O2放出6 题变式 6 -1. 将 Na2O2放入盛有以下溶液的小烧杯中,既有气体,又有积淀产生的是 ( ) ①MgSO4溶液②NaCl 溶液③Na2SO4溶液④饱和澄清石灰水⑤C a(HCO3)2溶液 A .①②③④⑤ B .①④C.①④⑤ D.③④⑤ 6 -2. 取 a g 某物质在 O2中完满燃烧,将生成物与足量 Na2O2固体完满反应,反应后,固体质量恰好也增添了 a g,以下物质不可以满足上述结果的是() A .H2 B.CO C.C6H12O6 D.C12H22O11 6-3. 必然量的 NaOH稀溶液 ( 含酚酞 ) 中分别加入足量的以下物质,一段时间后,红色必然消逝的是() ①H2O2 ②HCl③SO2 ④Cl2⑤NaHCO3.A① B.②⑤ C.②③④⑤ D.①②③④6-4. 将 0.01 mol 以下物质分别加入100 mL蒸馏水中,恢复至室温,所得溶液中阴离子浓度的大小序次是( 溶液体积变化忽视不计)()①Na2O2 ②Na2O ③Na2CO3 ④NaCl A.①>②>③>④ B .①>②>④>③ C.①=②>③>④ D.①=②=③=④二、双项选择题7 .(2011?上海高考 ) 过氧化钠可作为氧气的本源。

高三语文第一轮复习的练习和答案

高三语文第一轮复习的练习和答案

高三语文第一轮复习的练习和答案高三语文第一轮复习的练习和答案一、语言基础知识1.下列各句中加点词语的使用,全都正确的一项是( )①张海迪在两会上指出,《慈善法》审议通过后,既能让人们认识到捐赠的意义,又能使全国上下出现[激浊扬清]的清明景象。

②每个时代都有不同的思维与潮流,这一代人过惯了太平盛世的舒适日子,要求他们效法先民[焚膏继晷]、废寝忘食的干劲,既苛求,也不切实际。

③对张伯苓这样一个政治上有些糊涂又有些声望的人,周恩来并没有把我们的政治态度和思想认识强加于他,让他接受,而是逐渐地[循循善诱],启发自觉。

④“女当家”在选房一事上大都会眼观六路、耳听八方,即便销售顾问再如何地[巧舌如簧],她们仍会坚守自己的选房法则。

⑤晋文公为表达对介子推的哀思,下令禁火寒食,自此,[习以为常],有了寒食一节。

⑥在这个城市疏离大自然、对农作物极其陌生的年代,重过谷日节,感受农业的重要、粮食的意义,对于[四体不勤、五谷不分]的当代人来说,特别是对孩子来说,还是很有价值的。

a.①②④b.③⑤⑥c.②④⑥d.①③⑤答案 c解析①句“激浊扬清”:冲去污水,让清水上来,比喻抨击坏人坏事,褒扬好人好事。

该词只能充当谓语,不能充当定语,用在此处也不合语境,故错。

②句“焚膏继晷”:点燃灯烛来接替日光照明,形容夜以继日地用功读书或努力工作。

用在此处正确。

③句“循循善诱”:指善于有步骤地引导别人学习。

这与前面的“逐渐地”在语意上重复。

④句“巧舌如簧”:舌头灵巧得就像乐器里的簧片一样,形容能说会道,善于狡辩。

⑤句“习以为常”:常做某种事情或常见某种现象,成了习惯,就觉得很平常了。

此处可改为“相沿成俗”。

⑥句“四体不勤,五谷不分”:形容脱离生产劳动,缺乏生产知识。

用在此处正确。

2.下列各句中,没有语病的一句是( )a.即使在“说谎成风”的时期,人对自己也不会讲假话,何况在今天,我不怕大家嘲笑,我要说:我怀念包弟,我想向它表示道歉。

b.谢娜是近年来深受观众喜爱的电视节目主持人,她幽默风趣,亲和力很强,拥有广泛的支持者,有很高的收视率。

13年江苏高考数学一轮复习教案课时训练答案第一章第4课时 (1)

13年江苏高考数学一轮复习教案课时训练答案第一章第4课时 (1)

§1.4 集合与常用逻辑用语的综合应用1.在解题过程中,加深对集合之间的关系与集合运算等概念的理解.2.正确理解命题及其关系、逻辑联结词与量词等概念,进一步认识集合语言与逻辑语言之间的关系.3.在集合运算过程中,要借助数轴、直角坐标系、V enn 图等将有关集合直观地表示出来,注意集合与方程、函数、不等式、三角函数、几何等知识的密切联系与综合运用.[难点正本 疑点清源]1.集合中的“交”、“并”、“补”与逻辑联结词“且”、“或”、“非”有共同之处,在解题时,可以进行相互转化.2.集合运算可以考虑数形结合、借助数轴、V enn 图.1.集合A ={x |1+x 2<5x -3,x ∈Z }的子集的个数是_________________________________.2.命题“若m >0,则方程x 2+x -m =0有实根”的逆否命题为____________________.3.设集合A ={3,2a +1},集合B ={a ,b },若A ∩B ={2},则a =________,b =________.4.“a >0且b >0”是“b a +a b≥2”成立的____________条件. 5.已知集合P 是平面直角坐标系xOy 中的点集,若∀C (a ,b )∈P ,∃r >0,使{(x ,y )|(x -a )2+(y -b )2<r }⊆P ,则称P 为“开集”.给出下列三个集合:①{(x ,y )|x -y >0};②{(x ,y )|x ≥0};③{(x ,y )|x 2+y 2≤1},其中是开集的是________.(填写序号)题型一 集合问题例1 已知集合A ={x |y = 1-2x +1x +1},B ={x |[x -(a +1)][x -(a +4)]<0},分别根据下列条件,求实数a 的取值范围.(1)A ∩B =A ; (2)A ∩B ≠∅.探究提高 在将A ,B 具体化后,宜结合图形(本例为数轴)分析集合间的关系;对题(2)还可以进行反面思考:若A ∩B =∅,则a +1≥0或a +4≤-1,即a ≥-1或a ≤-5,从而得到A ∩B ≠∅时,a 的取值范围是(-5,-1).已知集合A ={x |x 2+4x =0},B ={x |x 2+2(a +1)x +a 2-1=0},当A ∪B =B时,求实数a 的取值组成的集合P .题型二 充分条件、必要条件问题例2 已知p :x 2-4x -32≤0;q :[x -(1-m )][x -(1+m )]≤0 (m >0).若“非p ”是“非q ”成立的必要但不充分条件,求m 的取值范围.探究提高 求得P ,Q 后,也可得到“非p ”:P 0=(-∞,-4)∪(8,+∞),“非q ”:Q 0=(-∞,1-m )∪(1+m ,+∞).于是由“非p ”是“非q ”成立的必要但不充分条件,知Q 0P 0.已知数列{a n }满足a n +a n +1=2n +1 (n ∈N *),求证:数列{a n }为等差数列的充要条件是a 1=1.题型三 有关逻辑联结词的问题例3 已知a >12且a ≠1,条件p :函数f (x )=log (2a -1)x 在其定义域上是减函数,条件q :函数g (x )=x +|x -a |-2的定义域为R .如果“p 或q ”为真,试求a 的取值范围.探究提高 (1)首先求出p 真、q 真的条件,即a 的范围.(2)由“p 或q ”为真,判断出p 、q 的真假.已知a >0,命题p :方程a 2x 2+ax -2=0在[-1,1]上有解;命题q :只有一个实数x 满足不等式x 2+2ax +2a ≤0.若命题“p 或q ”是假命题,求a 的取值范围.2.对命题否定不当致误试题:(14分)已知p :|3x -4|>2,q :1x 2-x -2>0,r :(x -a )·(x -a -1)<0. (1)綈p 是綈q 的什么条件?(2)若綈r 是綈p 的必要非充分条件,求实数a 的取值范围.学生解答展示审题视角 (1)可以求出p 、q 的不等式的解集,再对p 、q 否定,即求出它们对应不等式的解集的补集,也可以直接对不等式否定,但注意对分式不等式否定时,注意分母为零的情况.(2)綈r 是綈p 的必要非充分条件等价于綈p ⇒綈r 且綈rD ⇒/綈p .规范解答解 (1)p :|3x -4|>2,∴3x -4>2或3x -4<-2,∴x >2或x <23,∴綈p :23≤x ≤2. [2分] q :1x 2-x -2>0,即x 2-x -2>0, 令x 2-x -2=0,得x 1=-1,x 2=2.∴x 2-x -2>0的解集为{x |x <-1或x >2}. [4分] ∴綈q :{x |-1≤x ≤2},∴綈p 是綈q 的充分不必要条件. [6分](2)r :(x -a )(x -a -1)<0,∴a <x <a +1.∴綈r :x ≤a 或x ≥a +1.∵綈r 是綈p 的必要非充分条件. [8分] ∴綈p ⇒綈r 且綈rD ⇒/綈p , [10分]∴2≤a 或a +1≤23,∴a ≥2或a ≤-13. [12分] ∴a 的取值范围是⎩⎨⎧⎭⎬⎫a |a ≥2或a ≤-13. [14分] 批阅笔记 (1)对q :1x 2-x -2>0的否定应为:1x 2-x -2≤0或x 2-x -2=0.为避免出错,可以先求q :1x 2-x -2>0的解集,再否定. (2)在由綈p ⇒綈r 时,应特别注意分析是否能取等号.这是考生比较易出错的地方.要特 别注意验证等号能否成立.方法与技巧1.有的“p 或q ”与“p 且q ”形式的复合命题语句中,字面上未出现“或”与“且”字,此时应从语句的陈述中搞清含义,从而分清是“p 或q ”还是“p 且q ”形式.一般地,若两个命题属于同时都要满足的为“且”,属于并列的为“或”.2.逻辑联结词中,较难理解含义的是“或”,应从以下两个方面来理解概念:(1)逻辑联结词中的“或”与集合中的“或”含义的一致性.(2)结合实例,剖析生活中的“或”与逻辑联结词中的“或”之间的区别.生活中的“或”一般指“或此或彼只必具其一,但不可兼而有之”,而逻辑联结词中的“或”具有“或此或彼或兼有”三种情形.失误与防范1.p ∨q 为真命题,只需p 、q 有一个为真即可,p ∧q 为真命题,必须p 、q 同时为真.2.p 或q 的否定为:非p 且非q ;p 且q 的否定为:非p 或非q .3.对一个命题进行否定时,要注意命题所含的量词,是否省略了量词,否定时将存在量词变为全称量词,将全称量词变为存在量词,同时也要否定命题的结论.课时规范训练(时间:60分钟)A 组 专项基础训练题组一、填空题1.已知集合P ={y |y =x 2+4x +6,x ∈R },M ={y |y =2x +2x,x >0},则P ∩M =________. 2.已知集合A ={x |2x ≥2},B =(a ,+∞),当A ⊇B 时,实数a 的取值范围是[c ,+∞),则c =________.3.命题“∃x ∈R ,e x =x -1”的否定是___________________________________________.4.“x 2-4x <0”成立的一个充分而不必要条件是___________________________________.5.已知集合A ={x |a <x ≤a +1},B ={x |x ≥1},全集I =R ,则当A ∩(∁I B )=A 时,实数a 的取值范围是__________.6.命题“对一切非零实数x ,总有x +1x≥2”的否定是__________________________. 7.若a ,b ,c 是常数,则“a >0且b 2-4ac <0”是“对任意x ∈R ,有ax 2+bx +c >0”的____________条件.二、解答题8.已知命题p :存在一个实数x ,使ax 2+ax +1<0.当a ∈A 时,非p 为真命题,求集合A .B 组 专项能力提升题组一、填空题1.已知集合A =⎩⎨⎧⎭⎬⎫x |⎝⎛⎭⎫12x >14,B ={x |log 2(x -1)<2},则A ∩B =________. 2.已知集合A ={x |x 2-x ≤0,x ∈R },设函数f (x )=2-x +a (x ∈A )的值域为B ,若B ⊆A ,则实数a 的取值范围是____________.3.定义AD B =⎩⎨⎧⎭⎬⎫z |z =xy +x y ,x ∈A ,y ∈B .设集合A ={0,2},B ={1,2},C ={1},则集合(AD B )D C 的所有元素之和为________.4.已知命题P :∀b ∈[0,+∞),f (x )=x 2+bx +c 在[0,+∞)上为增函数;命题Q :∃x 0∈Z ,使log 2x 0≥0.给出下列结论:①綈P ∨綈Q 为真;②綈P ∧綈Q 为真;③P ∨綈Q 为真;④P ∧綈Q 为真.其中正确的为________.(填写序号)5.已知全集U =R ,集合A ={x |x 2-3x +2≤0},若B ∪(∁U A )=R ,B ∩(∁U A )={x |0<x <1或2<x <3},则集合B =________.6.命题“∀x ∈R ,tan(-x )=tan x ”的否定是______________________.二、解答题7.设有两个命题:①“关于x 的不等式x 2+(a -1)x +a 2>0的解集是R ”;②“函数f (x )=(2a 2+a +1)x 是R 上的减函数”.若命题①和②中至少有一个是真命题,求实数a 的取值范围.8.已知函数f(x)=x2+|x-a|,证明:函数f(x)是偶函数的充要条件是a=0.答案基础自测1.4 2.若x 2+x -m =0没有实根,则m ≤03.0 2 4.充分不必要 5.①题型分类·深度剖析例1 解 由1-2x +1x +1≥0,得-x x +1≥0,即x x +1≤0, 解得-1<x ≤0,故A =(-1,0],B =(a +1,a +4).(1)A ∩B =A ,即A ⊆B ,故⎩⎪⎨⎪⎧a +1≤-1,a +4>0,得-4<a ≤-2,故a 的取值范围是(-4,-2]. (2)若A ∩B ≠∅,则⎩⎪⎨⎪⎧a +4>-1,a +1<0,得-5<a <-1,故a 的取值范围是(-5,-1).变式训练1 解 由A ∪B =B 知A ⊆B .又A ={-4,0},故此时必有B ={-4,0},即-4,0为方程x 2+2(a +1)x +a 2-1=0的两根, 于是⎩⎪⎨⎪⎧-4+0=-2(a +1),(-4)×0=a 2-1,得a =1. 即P ={1}.例2 解 p :-4≤x ≤8,从而p 为真时x 的取值范围是集合P =[-4,8].同理可得,q 为真时x 的取值范围是集合Q =[1-m,1+m ].因为“非p ”是“非q ”成立的必要但不充分条件,所以“若非q ,则非p ”是真命题,但“若非p ,则非q ”是假命题,即“若p ,则q ”为真,“若q ,则p ”为假,故P Q ,从而⎩⎪⎨⎪⎧1-m ≤-4,1+m ≥8,且不等式组中两个等号不能同时成立,由此解得m ≥7,即m 的取值范围是[7,+∞).变式训练2 证明 (1)必要性 若数列{a n }为等差数列,则a 1,a 2,a 3也成等差数列,∴2a 2=a 1+a 3.又a 2=3-a 1,a 3=5-a 2=2+a 1,从而,2(3-a 1)=a 1+(2+a 1),∴a 1=1.(2)充分性 由a 1=1,得a 2=3-a 1=2.因为(a n +1+a n +2)-(a n +a n +1)=[2(n +1)+1]-(2n +1)=2,即a n +2-a n =2,所以数列{a 2k -1}是首项为1、公差为2的等差数列,数列{a 2k }是首项为2、公差为2的等差数列,从而a 2k -1=1+2(k -1)=2k -1,a 2k =2+2(k -1)=2k ,故a n =n ,进而a n +1-a n =1,∴{a n }为等差数列.故数列{a n }为等差数列的充要条件是a 1=1.例3 解 若p 为真,则0<2a -1<1,得12<a <1. 若q 为真,则x +|x -a |-2≥0对∀x ∈R 恒成立.记f (x )=x +|x -a |-2,则f (x )=⎩⎪⎨⎪⎧2x -a -2, x ≥a ,a -2, x <a ,∴f (x )的最小值为a -2,故q 为真即为a -2≥0,即a ≥2.∵“p 或q ”为真,∴p 真或q 真.∴a 的取值范围为12<a <1或a ≥2. 变式训练3 解 方程a 2x 2+ax -2=0,即(ax +2)(ax -1)=0,∴x =-2a 或x =1a. 不等式x 2+2ax +2a ≤0只有一个实数解,即Δ=(2a )2-8a =0,∵a >0,∴a =2.∵“p 或q ”为假命题,∴“p 假且q 假”, ∴⎩⎨⎧ ⎪⎪⎪⎪-2a >1,⎪⎪⎪⎪1a >1,a ≠2,解得0<a <1,即a 的取值范围是(0,1).课时规范训练A 组 1.[4,+∞) 2.123.∀x ∈R ,e x ≠x -1 4.0<x <1(或其他正确答案) 5.(-∞,0) 6.存在一个非零实数x ,使x +1x<2 7.充分不必要 8.解 非p 为真,即“∀x ∈R ,ax 2+ax +1≥0”为真.若a =0,则1≥0成立,即a =0时非p 为真;若a ≠0,则非p 为真⇔⎩⎪⎨⎪⎧a >0,Δ=a 2-4a ≤0⇔0<a ≤4.综上知,所求集合A =[0,4].B 组1.(1,2) 2.⎣⎡⎦⎤-12,0 3.18 4.③ 5.(0,3) 6.∃x ∈R ,tan(-x )≠tan x7.解 设命题①为假,则(a -1)2-4a 2≥0⇔-1≤a ≤13. 再设命题②为假,则2a 2+a +1≤0或2a 2+a +1≥1⇔a ≤-12或a ≥0. 若①②同时为假,则-1≤a ≤-12或0≤a ≤13. 从而,①②中至少有一个为真时,a 的取值范围是a <-1或-12<a <0或a >13. 8.证明 ①充分性 若a =0,则f (x )=x 2+|x |,所以f (-x )=(-x )2+|-x |=x 2+|x |=f (x ),故f (x )是偶函数.②必要性 若函数f (x )是偶函数,则f (-x )=f (x )对一切实数x 都成立,从而f (-1)=f (1),即1+|-1-a |=1+|1-a |,|1+a |=|1-a |,故(1+a )2=(1-a )2,所以a =0.故函数f (x )是偶函数的充要条件是a =0.。

高考化学一轮复习 课时练5 氧化还原反应(含解析)新人教版

高考化学一轮复习 课时练5 氧化还原反应(含解析)新人教版

学习资料氧化还原反应基础巩固1.(2020北京101中学月考)下列现象或活动过程中不发生氧化还原反应的是()2。

(2020湖南五市十校联考)已知NH4CuSO3与足量的2 mol·L—1硫酸溶液混合微热,产生下列现象:①有红色金属生成;②产生有刺激性气味的气体;③溶液呈现蓝色。

据此判断下列说法错误的是( )A.发生的反应为氧化还原反应B.有刺激性气味的气体可能是氨气C。

NH4CuSO3中铜元素既被氧化又被还原D。

2 mol NH4CuSO3完全反应转移1 mol电子3。

(2020吉林长春东北师范大学附中摸底)如果用16 mL 0.3 mol·L—1亚硫酸钠溶液恰好能将3.2×10-3 mol强氧化剂[RO(OH)2]2+还原到较低价态。

则反应后R的价态为( )A。

0价 B.+1价 C.+2价 D.+3价4。

(2020安徽宿州灵璧中学月考)钯的化合物PdCl2通过化学反应可用来检测有毒气体CO,该反应的反应物与生成物有CO、Pd、H2O、HCl、PdCl2和一种未知物质X。

下列说法错误的是()A.未知物质X为CO2,属于氧化产物B.每转移1 mol e-时,生成2 mol XC。

反应中PdCl2是氧化剂,被还原D。

还原性:CO〉Pd5。

(2020河北衡水中学期中)在酸性条件下,硫铁矿(FeS2)发生催化氧化反应的化学方程式为2FeS2+7O2+2H2O2Fe2++4S O42-+4H+,实现该反应的物质间转化如图所示。

下列分析错误的是()A。

反应Ⅰ的离子方程式为4Fe(NO)2++O2+4H+4Fe3++4NO+2H2OB.反应Ⅱ的氧化剂是Fe3+C.反应Ⅲ是氧化还原反应D。

黄铁矿催化氧化反应中NO是催化剂6.(2020福建厦门湖滨中学期中)工业上用铋酸钠(NaBiO3)检验溶液中的Mn2+,该反应的化学方程式为4MnSO4+10NaBiO3+14H2SO44NaMnO4+5Bi2(SO4)3+3Na2SO4+ ,下列说法不正确的是( )A14B。

新高考语文人教版一轮复习课后练习专题9语言文字运用Ⅰ课后集训

新高考语文人教版一轮复习课后练习专题9语言文字运用Ⅰ课后集训

第四板块专题九课后集训题组一一、阅读下面的文字,完成后面的题。

(11分)瘦西湖其实不瘦,有着七百多亩的宽阔水面,只是腰肢细长,故称瘦西湖。

瘦西湖是扬州城市的灵魂,有了瘦西湖,扬州人就有了骄傲的资本。

因为,瘦西湖实在是美,美得都不知道用什么词去形容和装饰。

碧水上绿树成荫,绿树下芳草萋萋,芳草里鲜花盛开。

还有一座座长虹卧波,一架架水车戏水,一处处亭树斜阳。

烟雨蒙蒙时,若有一叶扁舟划来,那扁舟划开的就是一幅更加迷离的画,载来的就是一个如梦如幻的世外桃源。

船是水的亲戚,①________,却一辈子都没吃够;船赶一辈子的水路,②________。

船的骄傲就是祖祖辈辈都与水为伍,都为水而生。

船也因为这条水有了说不尽的荣华富贵,道不尽的幸福人生。

这里的船承载过多少历史文化名人。

想当年,许多文人墨客,就是一边看船剪开一线水波,一边听风撩过一片白云,茶里煮诗,诗里烹酒,酒里弹弦,弦里和歌,歌里曼舞,留下佳话,唱和古今。

“二十四桥春水绿,兰桡随处傍花行”“故人西辞黄鹤楼,烟花三月下扬州”“二十四桥明月夜,玉人何处教吹箫”……这些诗句里的二十四桥,就是瘦西湖的二十四桥,也就是我说的一座座卧波长虹。

1.下列各句中的省略号,和文中省略号作用相同的一项是(3分)()A.穿长袍的问:“这位是……”“我的兄弟。

”戴礼帽的回答。

B.我觉得好像有万根钢针扎着喉管,失声喊起来:“老班长,你怎么……”C.在广州的花市上,牡丹、吊钟、菊花、山茶、墨兰……鲜花都在这里聚齐了。

D.她轻轻地哼起了《摇篮曲》:“月儿明,风儿静,树叶儿遮窗棂啊……”【答案】C【解析】文中的省略号表示列举的省略。

A.说话中断。

B.语意未尽。

C.列举的省略。

D.引文省略。

2.在文中横线处补写恰当的语句,使整段文字语意完整连贯,内容贴切,逻辑严密,每处不超过10个字。

(4分)①________________________________________________________________②________________________________________________________________【答案】示例:①船吃一辈子的水②(却)一辈子也(都)没有赶完3.文中画波浪线的句子可以改写成:“想当年,许多文人墨客,就是看船、听风、煮茶、吟诗、喝酒、弹弦、唱歌、跳舞,留下佳话,唱和古今。

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参考答案预备课程Units1- 12答案(一)1---5 BCBCC 6---10 ACADB(二)11---15 DBACA16---20 BDCBC 21---25 ACACB26. weekend 27. helpful 28. strong 29. hundred 30. Children/kids31. drawing 32. Mine 33. garden 34. friend 35. woman36. Reading 37. hobbies 38. playing 39.singer 40. twice(三)41. I share a dictionary with him.42. I love reading because I want to learn more about the world.43. The price of each student’s ticket is 5 yuan.44. Both Peter and I like football.45. What are you going to do this afternoon?(四)One possible version 一:I Learned to Help OthersWhen I was a little child, my mother told me that helping others was the happiest thing in the world. She wanted me to learn to help others. So I did as mother told me, helping others made me feel happy. When my friends had some difficulties, I always did everything I could to help them. Sometimes when I was in trouble, they would be very glad to help me, too.I think helping others can be not only good for others but also helpful for myself.Another possible version:I Learned to Play BasketballMy health was poor when I was a little child, the doctor told me to do more sports. He said it was good for my health. My father was very good at playing basketball, so he taught me to play it every day. At first, I couldn’t play well, but I didn’t give up and kept on trying, now I have become a good player on our school team.I am much stronger than before, I really enjoy doing sports, it makes me healthy and happy.7A Unit 1(一)1. Maths 2. music 3. helpful 4. wearing 5. best6. restaurant7. newest8. borrow9. dark 10. understand11.teeth 12. news 13. player 14. Teachers’15. her(二)16. B 17. B 18. B 19. A 20. A 21. B 22. A 23. B 24. C 25. D(三)26. changed 27. e-card 28. reasons 29. possible 30. feelings31. much 32. plan 33. love 34. sorry 35. popular(四)It is reported that China owns the most cell phones in the world. The cell phones play an important part in our daily life. By using it, we can contact people at any time and in any place. We can also send short messages, listen to music and take photos with the cell phones. But they are badfor our health. As a result of using it, people have fewer chances to communicate with each other face to face. Especially for the students, when they use them in class. It is really bad for them.7A Unit 2(一)1. together 2. Maybe/Perhaps 3. using 4. both 5. each6. clever7. practises8. sends9. Thursday 10. price11. decision 12. twelfth 13. lively 14. heavily 15. colourful(二)1~5 BC A DB 6~10 A A DBD 11~15 BCADA(三)1. spends half an hour reading newspapers2. are more than 300 students in the playground.3. goes to Reading Club twice a week.4. you watch the football matches on TV?5. has no time to chat with you(四)1. cost 2. had placed 3. bicycles 4. to show 5. carefully6. advertisement7. in the price of8. included9. honest 10. on(五)Dear Editor,Recently I made a survey about the use of the electronic dictionary. My classmates think that the electronic dictionary is useful, convenient and it can help to save time looking up the words. The parents also think the electronic dictionary is easy to carry and most families can afford it. But my English teacher doesn’t think we should use it,because she/he thinks its explanations for the words are too simple.I suppose the electronic dictionary will make US lazy and we shouldn’t use it.Y ours,Li Ping7A Unit 3(一)1. closed 2. Wednesday 3. again 4. October 5. candles6. teeth7. Rice8. by9. times 10. way11. me 12. better 13. organizing 14. closed 15. speaking(二)1~5 ABDAD 6~10 BBADD(三)1. last Saturday afternoon2. a group of boys3. cooked a meal over an open4. put out the fire and went to sleep5. The stream made its way across the field and then went through right under their tent! (四)Reading makes me happyWhen I was young, my mother used to tell me all kinds of stories before I went to bed every night .The storieswere so interesting that they attracted me a lot. So I began to read books by myself .Little by little, I becameinterested in reading. When I read books, I can enjoy the beautiful sentences. At the same time, I can improve my writing. When I read, I feel very fun. I can learn many things all over the world from reading. Reading can make me relax, it also can enrich my knowledge. I can learn much knowledge and many interesting things.I want to be a writer in the future, so I must study hard and read more books so that my dream can come true. I enjoy reading very much because it can make me happy. Do you like reading?7AUnit 4(一)1. simple 2. brave 3. lifestyle 4. energy 5. lemon6. hungry7. potatoes8. carries9. soup 10. kilos11. sheep 12. walking 13. lying 14. Congratulations 15. less(二)1. It’s important for dancers to be slim.2. We usually have beef and vegetables for lunch.3. Do you like chatting with your friend after lunch?4. How often do you visit you parents?(三)1~5 B C C B B 6~10 A A C A A11~15 A A D C B(四) 1.too much 2. breakfast 3. lots of 4. glass 5. For6. drinks7. likes8. also9. too 10. fat(五)How to keep away from the fluThe flu can spread easily among people. And do you know how to keep away from the flu? Here is my advice:Keep a balanced diet and do more sport. Keep the windows open. Drink plenty of/ enough water. Wash hands often, especially before and after meals. Don’t spit everywhere. Cover your mouth with your hands when you cough. A void going to the crowed places. Remember to keep warm. Don’t stay up late at night and get up early in the morning. Eating more fruit and vegetables is good for your health, too.Last but not least, when you are not feeling well, see the doctor at once.7A第五单元(一)1. minutes 2. invite 3. enough 4. pair 5. match6. centre7. paid8. bookshops9. cheaper 10. collecting11. really 12. shopping 13. more 14. countries 15. swimmer s’(二)1~5 CACCB 6~10 DABAB(三)1. depending on yourself2. Xihua County(县), Henan Province3. 12 years old4. two hour s’ walk6. part time jobs7A 第六单元(一)1. fashion 2. leather 3. modern 4. choose 5. posters6. also7. lazy8. matches9. boring 10.Finally11. wishes 12. comfortable 13. today’s 14. comes 15. buying(二)1~5 D A C A C 6~10 BA ACD(三)1. She wears her hair in a 1980s style.2. Everyone had a good time at the party.3. We need two more doctors.4. Y oung people like watching the fashion show.5. She looked at this pair of shoes for some minutes and then took them.6. Simon looks very smart and modern in white today.7. Mr Wu gave us a talk on computers.(四)As a good learner, we should have good habits and ways in learning. We need to get ready for our lessons before class and always listen carefully in class. After class, we must go over the lessons and finish our homework on time. It’s good to study in groups and help each other. As a student,working hard is important. But don’t forget to d0 sports and keep healthy. We should do more reading in our free time. If we have any problems, we’d better ask others for help. I hope all these will be helpful to us.7BUnit 1(一)1. quiet 2. message 3. favourite 4. different 5.shared6. twentieth7. opposite8. dream/ ideal9. millions 10. beaches11. buildings 12. sitting 13. printers 14. tidy 15. hundred(二)1—5. BCDDC 6—10 DABAD(三)1. first. 2. France 3. bookshelves 4. to show 5. wooden6. lies7. biggest8. looks9. friendly 10. to grow(四)My dream is to become a translator when I grow up.Nowadays, the world is getting smaller and smaller. People from different countries need to exchange ideas. But because they speak different languages, they have problems communicating with each other.I love English very much and I wish I could help people understand each other better by translating for them. What's more, I am outgoing and enjoy meeting people from different parts of the world.To make my dream come true, I'm studying hard, especially in English. I practice speaking English as much as possible. If my dream comes true, I will be able to make a great contribution to our country.7BUnit 2(一) 1. theatre 2. western 3. hospital 4. loaves 5. restaurant6. pollution7. areas8. held9. help 10. None11. speaks 12. sunny 13. western 14. their 15. visit(二)1—5 B B A B D 6—10 D D D B D(三)1. It takes me half an hour to go to school by bus.It takes me half an hour to take a bus to school.2. He did some reading until the midnight last night.3. If so, we will go to the hospital by underground.4. Let’s go to the supermarket, shall we?5. Why not visit our local theatre with us?(四)Great Changes in My HometownI’m really glad to see what’ve happened in my hometown. More and more ring roads have appeared and people’s living conditions have improved a lot. Buildings here are becoming taller and brighter. And there are more kinds of food and clothes to choose from. People can enjoy more sorts of leisure activities. We can not only study in modern schools bus also on the Internet. What’s more, it’s easier and quicker to use telephone or QQ to communicate with others.Thanks to our government, we can live a happy life. From now on, I will work harder to make my hometown more wonderful!7B Unit 3(一)1. failed 2. straight 3. following 4. received 5. monitor6. uniform7. traffic8. stairs9. Suddenly 10. robbers11.surprised 12. fortieth 13. mine 14. first 15. pleasure(二)1—5. C C C D B 6—10 A C D B D(三)1—5 A C D C B 6—10 A D D C B 11—15 A D B A B(四) 1. He looks forwards/ is looking forwards to seeing you again.2. Walk straight on and you will find a path near the river.3. He was surprised to see his lost English book.4. The students stopped talking when the teacher came in.(五)Possible versions:( A )Dear parents,Words fail me when I want to express my thanks to you. Y ou’ve taken good care of me since I was born. When I’m in trouble, you always encourage me and cheer me up. Once I argued with my best friend and was upset. Y ou talked with me the whole night and finally helped me solve the problem. With your help, I’ve become a good student. I’m so thankful for your love that I’ll work harder and try to do better in the future.Best wishes,Y oursZhang Hua( B )Dear Miss Gao,Words fail me when I want to express my thanks to you. Y ou’ve taken good care of my studies since I came to this school. When I’m in trouble, you always encourage me and give me good advice. I still remember that once I failed in an English exam and was upset. Y ou cheered me up and told me some good ways to improve my English. With your help, I’ve made great progress in English. I’m so thankful for your love that I’ll work harder and try to do better in the future.Best wishes,Y oursZhang Hua7B Unit 4(一)1.tongues 2. weighed 3. frightened 4. history 5. elephants6. strange7. unusual8. minutes’9. craze 10. sandwiches11. weight 12. play 13. later 14. following 15. happiness(二)1—5. BDBDA6—10 DCCCB(三)1---5. AADDA 6-- 10.BCAAB 11---15 CBDCA(四)1. Inventions 2. important 3. before 4. printing 5. cities6. drinking7. killed8.winter9. Glasses 10. writing7B Unit 5(一)1. high 2. chance 3. grateful 4. without 5. instead6. matches7. memories8. flew9. blanket 10. searching11. dangerous 12. yourself 13. ability 14. visitors 15. unhappy(二)1—5 CBCA A6—10 BDCCB(三)1—5 DBCAD 6---10 DBCDA11—15 CBADC(四) 1. Twice 2. bright-colored 3. electronic 4. lined 5. Expensive6. books7. personal8. money9. creative 10. chocolates7 B Unit 6(一)1. chase 2. wide 3. empty 4. edge 5. stone6. feathers7. weighs8. brushed9. tricks 10. teeth11. carefully 12. closing 13. sang 14. once 15. playing(二)1—5 C D A D D 6—10 D C C B A(三)1. took 2. into 3. keep 4. water 5. what6. with7. when8. away9. hard 10. tail(四)We are very glad that Zhou Hui has made great progress. But in the past he didn’t listencarefully in class. He also liked to play computer g ames every day. Ge Bin is Zhou Hui’s classmate and friend. He tried his best to make Zhou Hui be interested in his study and help him with his study after school. With his help,Zhou Hui studies very hard and gets on well with his classmates now.8A Unit 1(一)1.sense 2.honest 3.secret 4.generous 5.dangerous6.poor7.nervous8.activities9.uncomfortable 10.height11.busiest 12. taller 13. smiling 14. worse 15. activities(二) 1.D 2.D 3.D 4.B 5.A 6.D 7.B 8.D 9. A 10. C(三)1—5 A C D C A 6---10 B C B C B 11---15 A C B C B(四) 1. Y ou can believe is words because he is very honest.2. Betty is willing to do computer work at night.3. There is nothing else in the bag.4. John is not only my classmate but also my good friend.5. I don’t think diving is as dangerous as swimming.(五)Good morning,I’m really glad to talk to you. I’m Li Hua, 15 years old, from a five-people family. I like swimming and listening to music. In the past three years, I have been studying very hard. I got two prizes in maths competitions and three prizes in English. Going to No.1 Middle School for further study is always my dream for, you see, the school is so beautiful. If I can study here, I will work even harder. I will read as many books as possible, especially English books. My new dream in the new school is to enjoy myself with my new teachers and new friends.That’s all. Thank you very much.8A Unit 2一、1. solve 2. appearance nguages 4.tasty 5.subjects6.square7.less8.hero9.drove 10.admire11. most 12. interesting 13. useless 14. ideal 15. drawing二、1-5 BBDCD 6-10 CDACA三、1--5ABBBD 6—10 DBADC 11---15. BABDA四、1.enough 2.Children 3. diets 4. exercise 5. poor6. dirty7. taught8. found9. cleaned 10.houses五、Technology has made it possible for us to listen to our favourite music wherever we go. One of the advantages of listening to a Walkman is that we can listen to music without disturbing other people. It also keeps us from getting bored on long journeys.However, listening to a Walkman can cause some problems. Sometimes it can be dangerous because we can't hear traffic. What's worse, Walkmans stop communication between people.All in all, although Walkmans are popular among young people, I think we should be careful with them.8A Unit 3一、1. hiking 2. medals 3.beauty 4.cheer 5.traffic6.president7.metal8. leaves9.underground 10.support11.Luckily 12. ourselves 13. winner’s 14. greetings15. moving/movement二、1-5 DBCDB 6-10 A BAAA三、1.Please let me know how to keep healthy as soon as possible.2. I felt sick for most of the trip.3. His parents drive him to school every day.4. His mother taught herself how to sew when she was young.5. It is interesting to see so many places of interest from all over the world.(四)Sports in our school have changed a lot. Now we have more than three P.E classes a week, and we have at least one hour to exercise every day.Students get so excited at these changes. More and more students take part in the ball games, running, and jumping on the playground. Our school life is becoming more wonderful.Doing sports is a good way to relax and keep fit. What’s more. A healthy body can help us study better and live a happier life.8A Unit 4一、1.death 2. mice 3.danger 4.loss 5. governments6.forest7.encourge8.protected9.fur 10. incorrect11. terribly 12. degree 13. excitedly 14. clearly 15. angrily二、1-5 BAABB 6-10 BCBBC三、1. When the farmers cut down all the trees, the giant pandas will have nowhere to live.2. It is difficult for giant pandas to survive in the forests.3. If the elephants are thirsty, they walk till they find a river.4. If I don’t buy them, someone else will buy them.5. In China, the number of tigers is getting smaller and smaller.四、Good morning/afternoon, boys and girls. Welcome to our class. There is a popular reading corner in our class. We have had it for almost three years. We have many different kinds of books. All the books are from us. We like to read them very much. We can read the books after class or in our reading time. If anyone wants to read them at home, they can borrow and take a few of them back at weekends but they must bring them back on Monday morning. I hope some students can donate more and newer books. I also hope that we can exchange books with other classes so that we will be able to read more exciting and good books.8A Unit 5一、1.endangered 2.unhappy 3. wetlands 4. provides 5. litter6.importance7.entrance8. environment9. irregular 10.prevent11. children’s 12. theirs 13. reading 14. widely 15. writers二、1---5 CAA BD 6---10 A DCDC三、1---5 CDCCC 6---10 BBBBB 11---15 DDDDC四、1. nothing, from being 2. Luckily, we didn’t bring the raincoat3. wonder; when you grow up4. It’s too noisy. Turn down5. tells us to speak五、My SisterMy sister is an English teacher in a middle school. She is of mediumbuild with a pair of glasses on her face. She is hard-working and often helps the people in need. She loves and cares about her students. She likes singing and dances well. She is good at ping pong. This year, she will go to Sichuan, as a volunteer, to teach English in a middle school. I love my sister.8A Unit 6一、1.fear 2.trapped 3.wildly 4.lost 5.scream/screaming6.accident7.excuse8.advised9.temperature 10.arrival11. directions 12. clouds 13. soldiers’ 14. foggy 15. wildly二、1---5.C C C B C 6---10 D A D A B三、1. People ran wildly as the pieces of glass and bricks fell down.2. I calmed down and asked myself, "Am I trapped?"3. At first, people saw lightning, then they heard a big noise of thunder.4. The two cars crashed into each other yesterday.5. Many people were in a hurry to remove the snow in the street.6. We can do nothing but wait here.三、week, day, asked, are, happy, to get, Americans, teacher’s, of, but四、略8B Unit 1(一) 1. turn 2. waste 3. reduce 4. interview 5. repair6. over7. primary8. ever9. since 10. describe11. factories 12. lonely 13. unhealthy 14. unpleasant 15. recent(二) 1---5 DADA C 6---10 ACBAD(三) 1---5 CBAAB 6---10 ABACB 1---15 ABDCC(四) 1. fell asleep 2. worried 3. less than 4.carefully 5. to work6. sure7. worse8. some time9. result 10. gave(五) 1. got married to, moved into another flat in the center of2. Has, changed a lot3. government has turned the place into4. used to be late for5. pleasant for people to play chess(六) Changes to my hometownIn the past, my hometown was very small. There were no factories or schools here, and the traffic was very poor. The villagers lived a hard life. Now there have been great changes in this village. Now people live in big houses and many people even have their own cars. Everyone take action to protect the environment. The water in the river is clean and the sky is blue. The new road is wide and smooth. Their life is getting better and better. I wish it will become more and more beautiful.8B Unit 2(一)1. abroad 2. fresh 3.view 4.vistors 5. harmless6. excited7.fifth8. across9. useless 10.safely11.programmes 12. fantastic 13.clapped 14.check 15.symbol(二)1--5 CCBBA6---10 BBDDD(三)1—5 BDCAD 6—10 BDCDA(四)1.hills 2.history 3.plan 4.like 5.spend6. will give7.holidays8.pay the money9.everything 10.so on(五)1. Has; been on for a long timeeless; have kept it3.How long; take; walk4.tasty; can’t stop eat ing5.has kept the dictionary ; since a month ago(六)Beijing is one of the most beautiful cities in China. There are many places of interest there. Visitors from all over the world come to visit Beijing every year. Last year my family went to Beijing for a holiday. We visited one park after another. We also climbed the Great Wall and we were very proud of it. We’ll never forget the happy days in Beijing.8B Unit 3一、1. vocabulary 2. appeared 3. settings 4. clouds 5. icon6. processing7. courses8. stranger9. golden 10. tourists11. channel 12. designer 13. tourist 14. outline15. knowledge二、1---5 BCDAC 6—10 BBBBA三、1---5.DACCD 6---10 BABBD 11---15 BCACA四、1. problems 2. come out 3. interesting 4. However 5. playing6. realized7. try8. a little9. such as 10. successful五、1. was designed by, at the end of last year2. take an online travel, on the Internet3. learn a lot from4. bought me a lot of CD—ROM, but I found none of them interesting5. sounds impossible六、Now many students are learning about the Internet. It’s easy to go online, so a lot of students are using the Internet to read the news and search for information every day. Sending e-mails has become more and more popular. I think the Internet has become one of the most important parts in people’s daily life. But chatting or playing computer games for too long is bad for us. We should not spend too much time on the Internet. We should spend more time on study.8B Unit 4一、1.duties 2. silent 3. introducing 4. hangs 5. event6. phoned7. rising8. hosted9. speakers 10. snowy11.advertise 12. camera 13. support 14.public15.metarial二、1-5 DCCBC 6-10 CCADA三、1.same 2.fruit 3.candy 4. sandwich 5.daily6.delicious7.other8.tasty9. cold 10. popular四、1. held a charity show; successfully2. The audience clapped at the end of3. to discuss the performance of4. thank; because of ; lots of support and help5. must be finished五、There lives an old man next to my house. He has no children and no one looks after him. Last Sunday, my classmates and I went to his home. Some of us helped to wash clothes, cleaned the windows and swept the floor. Some of us read the newspaper to him. After doing these, we played chess with him and went out for a walk together. We felt a little tired that day, but we were glad. Because we helped the old man and he was very happy.8B Unit5(一) 1. international 2. volunteer 3. especially 4. interviewer 5. case6. seriously7. improvement8. training9. helpful 10. treatments 11. agreements12. excitement 13. medical 14. indeed 15. meaningful(二)1-5 BCDBD 6-10 DCDDD 11—12 BC(三)1--5 DABBD 6-10 BCCBA11-15 CDACC(四)1. it was our turn 2. Have you heard of 3. return the map to you4. to see his father was working5. should be written down(五) My DreamHello, my dear classmates! Everyone has his own dream. Me too. Where there is a dream, there is hope. My dream is to become a volunteer doctor in ORBIS in the future. I know ORBIS doctors should work very hard. They treat people with eye problems in poor countries. Sometimes they also train local doctors and teach them new skills and knowledge. They fly a lot and perform operations on the plane. They help many blind people to see again. So I think their work is great. I know if I want to be an ORBIS doctor, I must work hard. I must improve my study because I’m not good at some subjects. I must get a lot of medical knowledge. I will read more to collect information about eye protection so that I can help more people. That’s all. Thank you!8B Unit 6一、1.toothbrush 2. overcoat 3. deaf 4. hill 5. chance6. weekdays7. recorder8. wisely9.aids 10. hiking11. necessary 12. through 13. within 14. washed 15. excellent二、1---5 CCABB 6---10 CCBDC三、1---5 BCDAC 6---10 BCADA11---15 ACCBC四、1. give me some useful2. pay more attention to3. to speak loudly in public places4. come to China for further learning5. teamwork is the most important五、Boys and girls, attention please! I have something important to tell you. We will hold a charity walk next Sunday. The name of the activity is “Walk for Children”. The aim of “Walk for Children” is to raise money for Project Hope. Projec t Hope will provide poor children with food, clothes and a good chance to go to school with the money. We will start at 9 o’clock that morning and we’ll walk from our school to South Hill. Prepare well for it and don’t be late.9A Unit 1一、1. leader 2. silly 3. energetic 4. divided 5. confident6. attention7. patient8. recommend9. easy-going 10. success11. worst 12. differences 13. probably 14. unfair 15. leaders’二、---5 ACCDD 6---10 BADCA三、1. It’s necessary for students to finish the homework on time .2. It’s very kind of you to say like this.3. It’s silly of you not to forgive others for their faults.4. Sometimes he pays attention to details.5. Y ou will succeed if you work hard.1.David is so imaginative that he can come up with many new ideas.四、1---5 BDCDB 6—10 BDADA 11---15 BABCC五、1. signs 2. Meaning 3. energetic 4. happiness 5. business6. dishonest7. possible8. patient9. effort 10. work六、Tom is quite a modest boy, though he is excellent in many ways. He never shows off. He does not look down on other students, instead, he tries his best to help his classmates when they have trouble. He always shares his opinions with others. He is quite easy-going. He gets on well with his classmates. Everybody wants to make friends with himTom is also an able and brave boy. He is never afraid of difficulties. He often speaks in assembly. And when he speaks, he always wins the most applause.9A Unit 2一、1. climate 2. peaceful 3. balance 4. Perhaps/Maybe 5. growth6. realized7. moods8. sadness9. required 10. purity11.feeling 12. growth 13. written 14. useful 15. successfully二、1---5 ABBCD 6---10 DCCBA三、1. in a bad mood 2. a little bit stressed 3. wait there for two hours 4. finish the workon time 5. seems to be a new teacher四、1.with 2. take part in 3. at 4. Each 5. talking6. too7. have a good time8. three9. also 10. life五、1-5 BACDB 6-10 CDCDA11-15 BCACB六、1. Colours 2. objects 3. Happiness 4. Halloween 5. Y ellow6. Grass7. fear8. Loneliness9. clean 10. play七、One possible version:We live in a world full of colour. The world would be a dull place without it. No matter when and where we are, we will find all kinds of colours. Some people like red; some people like blue, white and so on. Otherwise, some like bright colours; some like light colours.I like bright green best because it is the colour of nature. It is also the colour of money. Green can give us energy, as it represents new life and growth. If we feel tired or weak, we can go out for walk in the fields or in the forests. We will feel comfortable, joyful and powerful.9A Unit 3一、1. strict 2. hobbies 3. suffered 4. replied 5. supporting6. whether7. traffic8. teenagers9. achieved 10. pleasure11. truth 12. stressed 13. herself 14. communication 15. suggestions二、1---5 DBBCC 6---10 CCCCD三、1. called 2. shopping 3. after 4. newspapers 5. telling6. started7. celebrate8. parents9. together 10. why四、1-5 BDCBD 6-10 CACCB 11-15 ACCBC五、1. failing 2. down 3. ill 4. someone 5. finishing6. change7. paper8. evening9. straight 10. else六、1.Eating too much is bad2.hand in your work after class3.could get my father’s support.4.top student in our class5.for stress is too much homework七、Dear Amy,I have some problems these days. I am crazy about chatting online and spend a lot of time chatting online. I often go home late. I can’t hand in my homework on time. My parents and my teacher don’t like this. They ask me to give up my hobby. I feel stressed and angry about it. Can you give me some suggestions? I am looking forward to hearing from you soon.Best wishes!Y ours,Simon9A Unit 4一、1. round-up 2.watching 3.Mary’s 4.directed 5.himself6.sadness7.replied8.attending9.yet 10.concert11. endings 12. presentation 13. lovers 14. worst 15. solving 二、1---5 CCDCB 6---10 CCBDA11---14 ABCD三、1. popular 2. for 3. unless 4. excited 5. harder6. father7. bought8. what9. send 10. using四、1---5 DCCA D 6---10 BBABB 11---15 ABABD五、1. peak 2. evenings 3. afternoons 4. usage 5. unknown6. producers7. fashion8. big/rich9. workplace 10. neighbours六、1. I was sleeping from 1 to 4 yesterday afternoon.2. Did you watch the fashion show last week? Y es, I did. What do you think of it? It’s very fashionable.3. Although those actors are all new, they perform very well.4. This book is full of horror, you will be interested in it.5. I didn’t know tigers were in danger until I watched the programmer.七、略9A Unit 5一、1. actresses 2. devotes 3. nominations 4. effect 5. insisted6. mourn7. lead8. effort9.enter 10. well-known。

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