初三基础知识天天练
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金属和金属材料一、单选题(共10道,每道10分)1.某市研发出7μm超薄铜箔,该项技术全国领先。
铜能加工成铜箔是利用铜的( )A.导电性B.导热性C.延展性D.抗腐蚀性2.使用下列金属制品时,主要利用金属导热性的是( )A. B.C. D.3.下列金属的用途与性质对应不恰当的是( )A.用铜做电线是由于其导电性良好B.用钨做灯丝是因为其熔点高C.铁制品表面镀铬是由于铬硬且不易氧化D.用金做饰物是因为金的密度大4.下列物质中不属于金属材料的是( )A.铝合金B.不锈钢C.铁D.氧化铜5.下列物质不属于合金的是( )A.青铜B.铝C.钢D.生铁6.下列关于合金的说法正确的是( )A.合金不属于金属材料B.合金一定不含非金属C.合金的硬度一般比各成分金属大D.多数合金的熔点高于组成它的纯金属7.工业上炼铁的原理是利用一氧化碳和氧化铁的反应。
某化学兴趣小组利用下图装置进行实验探究,关于该实验的说法错误的是( )A.实验开始前先通入一氧化碳,再对氧化铁进行加热B.实验开始后,可观察到A中粉末变成黑色,B中澄清石灰水变浑浊C.该实验体现出一氧化碳具有还原性和可燃性D.实验结束后应该先停止通一氧化碳,然后再撤去酒精喷灯8.炼铁高炉中发生了下列反应,其中属于化合反应的是( )①高温下一氧化碳将铁矿石还原为铁②灼热的焦炭和二氧化碳反应③焦炭充分燃烧A.①和②B.①和③C.②和③D.只有③9.下列防止自行车锈蚀的措施中,不合理的是( )A.用已生成的铁锈作保护层B.钢圈、钢丝表面镀防护金属C.链条表面涂抹机油D.车架表面喷涂油漆10.金属资源是不可再生的资源,保护金属资源是我们刻不容缓的职责。
下列有关叙述不正确的是( )A.提高废旧金属的回收利用率B.大力开采矿物以保障金属材料的供用C.在金属制品上刷漆、涂油等防止金属锈蚀D.用特种塑料代替金属制造机器的零部件。
水及其组成一、单选题(共10道,每道10分)1.爱护水资源,我们不仅要节约每一滴水,同时还要防治水体污染。
下列举措不合理的是( )A.工业废水经处理后循环使用B.生活污水净化后再排放C.禁止使用农药和化肥D.禁止在江边倾倒垃圾2.下列关于净化水的方法不正确的是( )A.使浑浊的水变澄清的一种方法是静置沉淀B.可用明矾吸附水中的不溶性杂质C.用过滤的方法得到的水为纯水D.蒸馏、煮沸能够降低水的硬度3.下列关于过滤操作的叙述中,不正确的是( )A.滤纸边缘低于漏斗边缘B.液面边缘低于滤纸边缘C.玻璃棒靠在三层滤纸的一边D.漏斗下端的管口置于烧杯中间4.下列说法正确的是( )A.含有可溶性钙、镁化合物的水是硬水B.软水中一定不含钙、镁化合物C.硬水和软水可用肥皂水来区分D.用肥皂洗衣服,硬水更容易起泡沫5.下列能证明水是由氢和氧两种元素组成的是( )A.水的净化B.水的汽化C.水的蒸馏D.水的电解6.有关电解水实验(如图所示)的叙述,错误的是( )A.试管a中的气体是氢气B.试管a与试管b中产生的气体体积比约为2:1C.该实验证明水由氢气和氧气组成D.电解水属于分解反应7.物质有纯净物和混合物之分,下列物质属于纯净物的是( )A.大理石B.蒸馏水C.清澈的湖水D.新鲜的空气8.下列说法正确的是( )A.化合物属于混合物B.含有氧元素的化合物都是氧化物C.不是所有的氧化物都属于化合物D.单质和化合物都是纯净物9.下列属于氧化物的是( )A.空气B.氧气C.KMnO4D.MgO10.下图是表示气体分子的示意图,图中“●”和“○”分别表示两种不同的原子,其中表示化合物的是( )A. B.C. D.2。
人教版九年级英语一单元基础知识练习题一、根据首字母提示完成单词1.There are several t on the teacher’s desk. Who do they belong to ?2.What about having c with friends in English class?3.Our Chinese teacher is very p with us ,so we all like her.4.Doing lots of listening practice is one of the s of becoming a good learner.5.I can understand the e on his face.6.During the trip , my uncle d a deep hole in the high mountain .7.My English is very poor . I never study g , It’s too boring .8.If you want to improve your pronunciation , you must listen to a tape andr out loud .9.There are two c labs in our school.10.I find it difficult to learn p well. I don’t like this subject. and I don’t like math , either.11.It really improves my speaking s , so I can speak much better now.12.My sister doesn’t know how to i her reading speed.13.They are spending much time r their lessons to prepare for the mid-term examination.14.Do you have a p to practice English with ?15.If you can’t p some of the new words , you can listen to the tape and repeat out loud .16.A good way to train the b is to do some math exercises every day .17.Our parents want us to make friends w .18.My brother is an a boy , he always take part in all kinds of activities .19.Annie’s mom sings well , she is born with the a to sing songs .20.Miss Zhou is a teacher with rich k .二、用括号内所给单词的正确形式填空。
第2模块 第5节[知能演练]一、选择题1.当0<a <1时,函数①y =a |x |与函数②y =log a |x |在区间(-∞,0)上的单调性为( ) A .都是增函数 B .都是减函数C .①是增函数,②是减函数D .①是减函数,②是增函数解析:①②均为偶函数,且0<a <1,x >0时,y =a |x |为减函数,y =log a |x |为减函数,当x <0时,①②均是增函数.答案:A2.函数f (x )=a x +log a x 在区间[1,2]上的最大值与最小值之和为-14,最大值与最小值之积为-38,则a 等于( )A .2B.12 C .2或12D.23解析:a x 与log a x 具有相同的单调性,最大值与最小值在区间的端点处取得,f (1)+f (2)=-14,f (1)·f (2)=-38,解得a =12,选B.答案:B3.已知函数f (x )=lg(x +1),用h (t )替换x ,那么不改变函数f (x )的值域的替换是( ) A .h (t )=t 2 B .h (t )=2t -2 C .h (t )=sin tD .h (t )=1t解析:原函数f (x )=lg(x +1)的值域是R ,用h (t )替换x 后,要使f (x )的值域不变,应使h (t )+1能够取遍所有正数,只有h (t )=2t -2符合题意,故选B.答案:B4.设a >1,若对于任意的x ∈[a,2a ],都有y ∈[a ,a 2]满足方程log a x +log a y =3,这时a 的取值的集合为( )A .{a |1<a ≤2}B .{a |a ≥2}C .{a |2≤a ≤3}D .{2,3}解析:由log a x +log a y =3,得log a (xy )=3,即y =a 3x ,∵a >1且x >0,∴y =a 3x在x ∈[a,2a ]上单调递减,∴y max =f (a )=a 3a =a 2,y min =f (2a )=a 32a =a 22,由题意,得⎩⎪⎨⎪⎧a 22≥a ,a >1得a ≥2.故选B.答案:B 二、填空题5.函数y =log 3(x 2-2x )的单调减区间是________. 解析:令u =x 2-2x ,则y =log 3u .∵y =log 3u 是增函数,u =x 2-2x >0的减区间是 (-∞,0),∴y =log 3(x 2-2x )的减区间是(-∞,0). 答案:(-∞,0)6.已知f (3x )=4x log 23+233,则f (2)+f (4)+f (8)+…+f (28)的值等于________. 解析:令3x =t ,∴x =log 3t , ∴f (t )=4log 23·log 3t +233, 即f (t )=4log 2t +233, ∴f (2)+f (4)+f (8)+…+f (28)=4(log 22+log 24+log 28+…+log 228)+8×233 =4·log 22·22·23…28+8×233 =4·log 2236+1864. =4×36+1864=2008. 答案:2008 三、解答题7.对于正实数a ,函数y =x +a x 在(34,+∞)上为增函数,求函数f (x )=log a (3x 2-4x )的单调递减区间.解:∵y =x +a x 在(34,+∞)上为增函数,∴34<x 1<x 2时y 1<y 2, 即x 1+a x 1-x 2-a x 2=(x 1-x 2)(x 1x 2-a )x 1x 2<0⇒x 1x 2-a >0⇒a <x 1x 2,∴a ≤916恒成立,f (x )=log a (3x 2-4x )的定义域为(-∞,0)∪(43,+∞),而0<a ≤916<1,∴f (x )与g (x )=3x 2-4x 在(-∞,0),(43,+∞)上的单调性相反,∴f (x )的单调递减区间为(43,+∞).8.已知函数f (x )=log 4(4x +1)+kx (k ∈R )是偶函数. (1)求k 的值;(2)设g (x )=log 4(a ·2x -43a ),若函数f (x )与g (x )的图象有且只有一个公共点,求实数a 的取值范围.解:(1)由函数f (x )是偶函数可知:f (x )=f (-x ), ∴log 4(4x +1)+kx =log 4(4-x +1)-kx ,log 44x +14-x +1=-2kx ,即x =-2kx 对一切x ∈R 恒成立, ∴k =-12.(2)函数f (x )与g (x )的图象有且只有一个公共点,即方程log 4(4x +1)-12x =log 4(a ·2x -43a )有且只有一个实根,化简得:方程2x +12x =a ·2x -43a 有且只有一个实根,令t =2x >0,则方程(a -1)t 2-43at -1=0有且只有一个正根,①a =1⇒t =-34,不合题意;②Δ=0⇒a =34或-3,若a =34⇒t =-2,不合题意;若a =-3⇒t =12;③一个正根与一个负根,即-1a -1<0⇒a >1. 综上:实数a 的取值范围是{-3}∪(1,+∞).[高考·模拟·预测]1.若函数y =f (x )是函数y =a x (a >0,且a ≠1)的反函数,其图象经过点(a ,a ),则f (x )=( )A .log 2x B.12x C .log 12xD .x 2解析:由题意f (x )=log a x ,∴a =log a a 12=12,∴f (x )=log 12x .故选C.答案:C2.若不等式x 2-x ≤0的解集为M ,函数f (x )=ln(1-|x |)的定义域为N ,则M ∩N 为( )A .[0,1)B .(0,1)C .[0,1]D .(-1,0]解析:由题意得M =[0,1],N =(-1,1),则M ∩N =[0,1).故选A. 答案:A3.设a =log 3π,b =log 23,c =log 32,则( )A .a >b >cB .a >c >bC .b >a >cD .b >c >a解析:a =log 3π>1,b =log 23=12log 23∈(12,1),c =log 32=12log 32∈(0,12),故有a >b >c .答案:A4.若log 2a <0,(12)b >1,则( )A .a >1,b >0B .a >1,b <0C .0<a <1,b >0D .0<a <1,b <0解析:由log 2a <0⇒0<a <1,由(12)b >1⇒b <0,故选D.答案:D5.已知:f (x )=lg(a x -b x )(a >1>b >0). (1)求f (x )的定义域;(2)判断f (x )在其定义域内的单调性;(3)若f (x )在(1,+∞)内恒为正,试比较a -b 与1的大小. 解:(1)由a x -b x >0, ∴(a b )x >1.∵ab >1,∴x >0, ∴f (x )的定义域为(0,+∞). (2)设x 2>x 1>0,∵a >1>b >0, ∴a x 2>a x 1,b x 1>b x 2,-b x 2>-b x 1, ∴a x 2-b x 2>a x 1-b x 1>0,∴ax 2-bx 2ax 1-bx 1>1,∴f (x 2)-f (x 1)>0,∴f (x )在(0,+∞)内是增函数.(3)当x ∈(1,+∞)时,f (x )>f (1),要使f (x )>0,须f (1)≥0,∴a -b ≥1.[备选精题]6.已知f (x )=log a x ,g (x )=2log a (2x +t -2)(a >0,a ≠1,t ∈R ). (1)当t =4,x ∈[1,2],且F (x )=g (x )-f (x )有最小值2时,求a 的值; (2)当0<a <1,x ∈[1,2]时,有f (x )≥g (x )恒成立,求实数t 的取值范围. 解:(1)当t =4时,F (x )=g (x )-f (x )=log a (2x +2)2x ,x ∈[1,2],令h (x )=(2x +2)2x =4(x +1x+2),x ∈[1,2],设u =x +1x ,x ∈[1,2]作出u (x )的图象可知u (x )=x +1x 在[1,2]上为单调增函数.∴h (x )在[1,2]上是单调增函数, ∴h (x )min =16,h (x )max =18. 当0<a <1时,有F (x )min =log a 18, 令log a 18=2,求得a =32>1(舍去); 当a >1时,有F (x )min =log a 16, 令log a 16=2,求得a =4>1.∴a =4.(2)当0<a <1,x ∈[1,2]时,有f (x )≥g (x )恒成立, 即当0<a <1,x ∈[1,2]时, log a x ≥2log a (2x +t -2)恒成立, 由log a x ≥2log a (2x +t -2)可得 log a x ≥log a (2x +t -2),∴x ≤2x +t -2,∴t ≥-2x +x +2. 设u (x )=-2x +x +2=-2(x )2+x +2 =-2(x -14)2+178,∵x ∈[1,2],∴x ∈[1,2].∴u (x )max =u (1)=1. ∴实数t 的取值范围为t ≥1.。
新目标九年级上册英语Unit3基础知识练习题及答案一、根据句意及汉语提示填写单词。
(10分)1. We've got lots of time. You don't need to ________(仓促).2. Mike's favorite hobby is collecting ________(邮票).3. Lucia is taking a shower in the ________(浴室).4. I'm going to send my pen pal a ________(明信片) as his birthday present.5. Are there any ________(洗手间)in the neighborhood?6. P me, but what’s your job?7. On my way home, I will p by a library and a post office.8. Can you tell me why you like collecting(邮票)?9. John sits(在旁边)David in class.10. —Would you like some(葡萄)?—No, thanks.二、用括号内所给单词的适当形式填空。
(5分)1. ________(who)did you give the book to?2. It's ________(polite)not to say “goodbye” to your teacher when you leave the classroom.3. The ________(speak)gave us a good speech last week.4. We have seven ________(course)this term.5. Can you tell me which ________(direct)your room faces?三、按要求完成下列句子,每空一词。
离子和元素一、单选题(共10道,每道10分)1.下列微粒结构示意图表示阴离子的是( )A. B.C. D.2.如图是部分元素的微粒结构示意图,下列描述正确的是( )A.①③均表示原子结构示意图B.①中的最外层电子数为8,所以它是稀有气体元素C.②中核电荷数x=12D.④若表示的是离子,则它的最外层电子数y=73.关于下列微粒结构示意图说法正确的是( )A.达到相对稳定结构的有②⑤⑥B.②③中核外电子数均为8C.④对应的离子结构示意图核外有10个电子D.⑤表示的微粒符号是Mg2-4.下列离子符号书写正确的是( )A.Cl-1B.Ca2+C.H+1D.SO4-25.下列对分子、原子、离子的认识,不正确的是( )A.分子、原子、离子都在不断地运动B.原子通过得失电子形成离子C.钠原子的质子数大于钠离子的质子数D.分子、原子、离子都可以直接构成物质6.下列有关元素的说法错误的是( )A.物质都是由元素组成的B.同种元素的原子核内中子数相同C.元素分为金属元素和非金属元素D.元素周期表中原子序数等于该元素原子核内的质子数7.铝锂合金中的铝(Al)元素和锂(Li)元素的本质区别是( )A.元素符号不同B.原子质量不同C.原子的质子数不同D.原子的电子数不同8.下列地壳中元素含量按从多到少排序正确的是( )A.O、Si、Fe、AlB.Fe、Al、Si、OC.O、Si、Al、FeD.Al、O、Si、Fe9.下列说法正确的是( )A.NA表示钠元素B.决定元素种类的是最外层电子数C.S表示1个硫元素,还表示硫原子D.在化学变化中元素种类不会发生变化10.硅元素在现代信息技术产业有着广泛的应用,它在元素周期表中的信息如图所示。
下列说法正确的是( )A.硅元素属于金属元素B.硅原子的质子数为14C.地壳中含量最高的元素是硅D.硅元素的相对原子质量是28.09 g。
精品空气成分、物质燃烧一、单选题(共10道,每道10分)1.空气是宝贵的自然资源,空气中体积分数约占21%的是( )A.氮气B.氧气C.二氧化碳D.稀有气体2.下列各组物质中,前者属于混合物,后者属于纯净物的是( )A.冰水混合物、液氮B.稀有气体、食醋C.洁净的空气、蒸馏水D.氢气、矿泉水3.下列关于空气中各组成成分的说法正确的是( )A.稀有气体没有任何使用价值B.氧气能支持燃烧,可以作燃料C.二氧化碳是导致酸雨的主要原因D.氮气可作为生成氮肥的原料4.PM2.5是指空气中直径小于或等于2.5微米的颗粒物,它是造成雾霾天气的“元凶”之一。
下列做法不会增加空气中PM2.5的是( )A.燃煤发电B.燃放烟花爆竹C.焚烧垃圾D.使用太阳能热水器5.对下列实验现象的描述不正确的是( )A.木炭在氧气中燃烧发出白光B.硫在空气里燃烧发出明亮的蓝紫色火焰C.红磷在空气中燃烧产生大量白烟D.细铁丝在氧气中燃烧火星四射6.下列反应属于化合反应的是( )A.硫酸铜+氢氧化钠硫酸钠+氢氧化铜B.碳酸氢钠碳酸钠+二氧化碳+水C.氢气+氯气氯化氢D.碳+氧化铜铜+二氧化碳7.下列反应不属于氧化反应的是( )A.一氧化碳+氧气二氧化碳精品B.碱式碳酸铜氧化铜+二氧化碳+水C.甲烷+氧气二氧化碳+水D.红磷+氧气五氧化二磷8.在下列四个化学变化中,属于图中阴影部分的是( )A.氧化钙+水氢氧化钙B.酒精+氧气二氧化碳+水C.水氢气+氧气D.硫+氧气二氧化硫9.下列关于物质与氧气反应的说法中,正确的是( )A.属于化合反应B.都需要加热C.都发生燃烧现象D.都是氧化反应10.下列变化不属于缓慢氧化的是( )A.动植物呼吸B.食物腐败C.蜡烛燃烧D.粮食酿酒。
English 知识点集练)1.Her parents workers. A. is both B. are all C. both is )2.Her parents in the factory. A. work all B. work both)3.They are twins, them are in the same class. A. All B. Both )4.There are fifty students in our class and them are boys.A. AllB. BothC. All ofD. Both of )5.Thank you for me to come to yourparty.)6.What about to the zoo? A. going A. ask B. asking B. go C. to goD. are bothC. both work C. All ofC. to askD. goesD. all work D. Both ofD. asked)7.Did you finished the story book? A. read B. to read C. reading D. reads )8.She likes English very much. A. learn B. learning C. learns D. learnt )9.He often practices English with foreigners.A. speakB. speakingC. to speakD. speaks )10.She kept me for one hour at the school gate. A. wait B. waiting )1 l.Heprefers to .C. swimming, to skate )12.1 hate noise in class.)13.Do you mind the door? )14.Can you consider )15.The teacher allowedA. singC. waitedD. to wait A. swimming, skating D. swim, skating A. making B. make A. openingB. open B. swimming, skate this work? A. do B. toin class yesterday. B. to sing C. singing D. sings out for the heavy rain.C. makes C. opened C. doinsD. made D. opens D. done)16.You'd betterA. don't goB. not to goC. not goD. won't go )17.You'd better to the school earlier.A. comeB. to comeC. cameD. conies )18.Why isMrWang ? )19.What is Mr Wang )20.What are they )21 .They are a TV play. )22. TheyA. worried A. worried A. talking A. talkingB. worried about B. worried about B. talking aboutB. talking aboutC. worry C. worry C. talk to C. talk toD. worry about D. worry about D. talk about D. talk aboutChinese teacher now.A. talkingB. talks aboutC. are talking to )23.Why did they in class? A. talking )24.He will have to tell us.D. talking aboutB. talking aboutC. talk toD. talkA.something importantB. important somethingC. anything importantD. important anything)25.Do you have to say?A. something elseB. else somethingC. anything elseD. else anything)26.do you say?A. What elseB. What otherC. What somethingD. What other else )27.1 have twobrothers, One is a worker, is a doctor.A. The otherB. otherC. anotherD. the others)28.1 have four brothers, One is a worker, is a doctor, are farmers.A. Another, The othersB. Another, OthersC. The other, The othersD. other, another )29.1have three pens on the desk, One is red, is green, is black, And are Lily'sA. Another, The other, OthersB. The other, The other, OtherC. The other, Another, OthersD. Another, Another, the others)30.he is in the classroom. A. Maybe B. May be C. maybe D. may be )3 l.He at home now.A. MaybeB. May beC. maybeD. may be)32.Why go with me? A. not to B. don't you C. don't D. not you)33.Why come here earlier? A. not B. not to C. don't D. not you)34.1 have money now. A. a little B. a few C. many D. few)35.Do you have money? A. a few B. some C. any D. many)36.Can you lend me money? A. a few B. some C. any D. many)37.We have apples, Let's eat them together.A. a littleB. littleC. fewD. a few)38.After he finished his homework, He went on English with meA. speakB. speakingC. to speakD. spoke )39.They had a rest then they went on. A. workB. workingC. to workD. worked )40.He went the bridge just now. A. pass B. cross C.across D. through)41 .The bird flied the window. A., pass B. cross C. across D. through)42.We went the street to the bookshop to buy some books.A. passB. crossC. acrossD. through)43.Fm very tired I have to stop a rest. A. have B. having C. to have D. had)44.He stopped his work because he was very tired.A. doB. doingC. to doD. did)45.He is an boy. A. 8-years-old B. 8-year-old C. 6-years-old D. 6-year-old )46.This is a race (赛跑).A. 100-metersB. 100-me ter )47.Everyone is here Lin Tao.)48.He went to Beijing Shanghai.)49.Shanghai is bigger than )50. Shanghai is bigger than )51.Which do you like )52. Which do youlikeC. 100 meterD. A. except B. besides A. except B. besides city in China. A. any other city in Japan. A. any other ,apple, pear and orange? A. better pear and orange? A. better what you said.C. to, withA. with 100 meters C. but isC. but is B. other B. other B. bestB. bestD. notD. not C. some C. some C.good C.goodD. any D. any D. well D. well)53.1 agree you, and I agree A. with, to B. with, with C. to, with D. to, to )54.1 don't agreeyour words. A. with B. to C. of)55. the teacher came in, We were talking. A. When )56. The teacher came in, we were talking.A. When )57.Can you speakEnglish? A. )58.He is very. A. happy )59.He lives very. A. happy )60.He feels very. A. happy)6 l.He is a boy. A. happy)62.He is playing very. A. happy )63.The man lives the third floor.quick B. happily B. happily B. happilyB. happily B. happily A. atD.about B. While B. WhileC. So C. SoD. As D. AsB. quicklyC. happier C. happier C. happierC. happier C. happierC. quietD. loudD. more happily D. more happily D. more happily D. more happily D. more happily D.\)64.1 live ____ _this city.A. atB. onC. inD.\ )65 .They live____ that island. A. at B. on C. in D.\ )66.He lives __ ___ there. A. atB. onC. inD.\C. in B. on )67.1 heard A. sing)68.I.often hear Lucy )69.1 saw Johnsomeone when I passed the room.B. singingC. to singD. singsA. singB. singingC. to singD. singswhen I came into the classroom. D. draws)70.1 saw John last Sunday. A. draw B. drawing C. to draw D. draws)71 .It's very nice __ _you. A. of B. to C. for D. at)72.It's very difficult ___ you to work out this problem. A. of B. to C. for )73.1 go to school __ —my bike every day. A. on B. by C. in D. take )74.1 go to school — __ bike every day. A. on B. byC. inD. takeD. atA. drawB. drawingC. to drawD. gone)82.some pens on the desk. A. have B. has C. there is D. there are )83.In the classroom many chairs. A.have B. has C. there is D. there are)84. the classroom many chairs. A. have B. has C. there is D. there are)85.There^^^a meeting tomorrow.A. will haveB. will isC. will beD. is going to have )86.Three years since we met last time.A. have passedB. has passedC. passedD. was passed )87.Two million dollars much money for me. A. is B. are C. was D. were)88.Fifty kilometers ______ a long way. A. is B. are C. was D. were )89.Can you_ __ me your bike? A. lend B L borrow C. lent D. borrowed )90. Can you_ ___ your bike to me? A. lend B. borrow C. lent D. borrowed )9 LI ___ your bike yesterday. A. lend B. borrow C. lent D. borrowed )92.You_____ m e your bike yesterday. A. lendB. borrowC. lentD.borrowed )93.1 often __ _your bike from you.A. lendB. borrowC. lentD.borrowed)94.How longcan I ____ your pen? A. lend B. borrow C. lent D. keep)95.1 have your bike for two days. A. keep B. borrowed C. lent D. kept )96.The old man has for two weeks. A. died B. dead C. be dead D. been dead)97.The shop has since September 2005.A. openedB. was openC. been openD. been opened )98.1 have the dictionary since three months ago. A. buy B. bought C. have D. had )99.The film has for five minutes.A. been onB. startedC. started onD. be on )100.He has the army for two years. A. joined B. join C. been in D. been on)100.How long have you Giumgdong? A. come B. came C. been to D. been in )101.How many times have you Beijing?A. gone toB. been toC. been in)102.—Where is Tom? —He — America.A. has been toB. has gone toC. have been toD. have gone to)103.beautiful flowers they are! A. How B. What C. How a D. What a )104.beautiful the flowers are! A. How B. What C. How a D. What a )105.fine weather it is! A. How B. What C. How a D. What)75.1 go to school a bus every day)76.1 go to school to a bus every day. )77.1 go to school bus every day. )78.1 go to school a car every day. )79.This is book. A. mine )80.The book is. A. mine )81.We all Chinese books. A. haveA. onA. on A. onA. onB. myB. myB. hasB.by B. by B.by B. byC. yours C. yourC. in C. in C. in C. inD. hers D. herD. take D. take D. take D. takeC. there isD. there area )106.important the computer! A. How B. What C. How a D. What an)107. _____ beautiful flower! _________ A. ,HowB. WhatC. HowaD. Wh iat a)108,—Who is over there? —Tom A. is B L has C. did D. does)109.-Who has been to Shanghai?- -Tom__ ・ A. is B. has C.didD.does)1 lO.-Who finished the homework? -I • A. is B. has C.did D. does)111.—Who can sing this song? —L iiy一A.is B. can C.did D. does)112. -Who often plays the piano? - -Jim • A. is B. can C. did D.does)113.He has been there, ______ he? A. isn't B. has n't C.(didn't D. doesn't)114.They are students, they? A. isn't B. hasn't C. didn't D. aren't)115.They have never seen the film,they? A. have B. hasn't C. are D. aren't )116.1 Was born August 2, 1968. A. in B. on C. at D. with)117.He was born August, 1978 A. in B. on C. at D. with)118. He was born August A. in B. on C. at D. with)119.She left her home a cold morning. A. in B. on C. at D. with)120.1 came to Tao Yuan an afternoon of August. A. in B. on C. at D. with)121.She will come back two days. A. in B. on C. for D. after)122.She came back two days. A. in B. on C. for D. after)123.She has been in China two weeks. A. in B. on C. for D. after)124.He back in two days. A. comes B. come C. came D. will come)125.He home after two days. A. comes B. come C. came D. will come)126.The number of the students in our class fifty. A. is B. are C. have D. Has)127.A number of the students on the playground. A. is B. are C. have D. Has)128.He sits Tom and John. A. between B. among C. in D. during)129.He stands the students. A. between B. among C. in D. during)130.1 wrote two stories this vacation. A. between B. among C. in D. during)131.She said that she to Guangzhou.A. would goB. will goC. is going toD. goes to)132.Could you tell me?A. where is the post officeB. where the post office isC. the post office is whereD. where the post office was.)133.1 didn't know A. where is Tom)134.Tom said no news)135.The teacher said the earth A. go B. went C. goes )136.He is good English. )137.He is weak maths.B. where Tom is good news. A. is B. arearound the sun. D. goingA. atB. in A. atB. inC. where was TomD. where Tom wasC. wasD. were C. onC. on)138.Tom does well Chinese. )139. Til go shopping If itA. won't rainB. don't rain D.of D. ofD. ofA. atB. inC. on rain tomorrow.C. doesn't rainD. didn't rainB. interesting, interested D. interesting,A. interestedB.interesting interesting C. interestD. interestsD. in)140.ril tell him about it as soon as he tomorrow.A. come backB. came backC. conies backD. coming back. )141.ril let him know when he back. A. came B. come C. comes coming)142.1 don't know if it tomorrow, if it I won't go out.A. rains, rainsB. rain, rainC. will rain, rainsD. rains, will rain )143.1 don't know when he back, when he back Fll tell him about it.A. comes, coniesB. will come, comesC. comes, will comeD. come, come )144.He said he was doing his homework. A.that B.what C.where D.which)145.He asked he could come in. A. that B. what C. where D. if )146.He asked we should meet. A. that B. what C. where D. which )147.The book is very,so we are all. A. interested, interesting B. C. interested, interested )148.We are in music. A. interestedB. interestingC. interestD. interests()150.Could you do_ _____ for me? A. something B. anything C. any thing D. some thing ()151 .Can I do _______ f or you? A. something B. anything C. any thing D. some thing ()152.There aren't_ ___ a pples on the table. A. someB. anyC. a littleD. little ()153.Are there _______ w ater in the bottle? A. someB. anyC. a fewD. few ()154.His brother was ill, he has to send __a doctor. A. for B. away C. to D. up ()155 The boss sent the worker ____ from the factory.A. forB. awayC. toD. up()156.We sent _________5 man ——made satellites this year.A. forB. awayC. toD. upC. to C. onB. away B. withD. up)157.Please send the sick man the hospital. A. for)158.The bottle is filled milk.A. of( )149.GuangDong has many places of.)159.The bowl is of water. A. fill B. filled C. full D. fulled)16O.The house looks very. A. nice B. well C. beautifully D. badly )161 .The food tastes. A. bad B. badly C. well D. beautifully )162.The coat feels very. A. soft B. softly C. hardlyD. badly)163.The coffee smells. A. nice B. well C. beautifully D. badly)164.Everyone watching TV A. like B. liked C. likes D. liking)165.Here is a letter you. A. to B. for C. with D. give)166.1 want him some books for me. A. to buy B. buy C. buying D. buys)167.The bike is different mine. A. for B. as C. from D. of)168.Best wishes you. A. to B. for C. with D. on)169.He did in our school. A. better B. good C. best D. well )170.1 hope do it for me. A. you to B. you C. him to C. he to)171.She ran faster than me. A. little B. few C. many D. much)172.John runs to catch up with Tom.A. enough fastB. fast enoughC. slow enoughD. enough slow )173.We did very in the test.A. badB. badlyC. goodD. nice)174.What do you mean the word? A. by B. to C. at D. about)175.Will you please late for school again?A. notB. don'tC. don't beD. no be)176.Could you please loudly? A. speak B. spoke C. to speak D. speaking)177.1 like basketball very much. A. play B. playing C. plays D. played)178.rd like basketball this afternoon.A. playB. playingC. to playD. played)179.Miss Li is one of the most popular in out school.A. teacherB. a teacherC. teachersD. teach)18O.The book is as as that one.A. interestingB. most interestingC. more interestingD. interested)181.He teaches maths. A. our B. ours C. us D. we)182.Tony fell his bike last Monday. A. from B. to C. down D. off)183.1 found very difficult to work out the problem.A. itB. thatC. whichD. this)184.The accident last morning.A. happenedB. was happenedC. was happeningD. happen)185.You must knock the door when you come in.A. inB. atC. toD. of)186.The workers didn't have a rest they finished the work.A. whenB. afterC. untilD. or)187.We must speak English as as possible.A. manyB. muchC. quickD. more)188.Have you found your watch? A. yet B. already C. ever D. never)189.Which is the second invention?A. importantB. more importantC. most importantD. importantest)190.Maths more interesting than Chinese. A. is B. are C. were D. was)191.Maths isn't Chinese. A. as interesting as B. so more interesting asC. as interesting soD. so interesting than)192.Betty will Beijing next week.A. arrive atB. getC. reachedD. arrive in)193.1 like having the mooncakes nut. A. have B. in C. with D. on)194.We keep fifty this year. A. sheeps B. sheep C. pig D. cat)195.1 hope everything.A. goes wellB. goes goodC. go wellD. go good)196.Have you the story?A. heardB. heard ofC. heard fromD. heard to( )197.He in the factory since heA. has worked, cameB. worked, came ()198.This is useful book. A. a()199.The book is useful. A. a()200.We will go to England our holiday. here.C. has worked, comeB. anB. anA. forC. theC. theB. onC. inD. worked, comesD.\D.\D. at。
——————————新学期新成绩新目标新方向——————————质量守恒定律一、单选题(共10道,每道10分)1.下列有关质量守恒定律的认识,正确的是( )A.质量守恒定律是指反应物的质量总和等于生成物的质量总和B.质量守恒定律揭示了化学变化中宏观物质之间的质量关系,与微观过程无关C.自然界中的所有变化都遵循质量守恒定律D.通过化学变化,只能改变世界上物质的种类,不能改变物质的总质量2.下列现象不能用质量守恒定律解释的是( )A.蜡烛燃烧逐渐变短,质量减小B.干冰在升华时,吸收周围空气的热量C.铝条燃烧后生成物的质量比铝条的质量大D.纸燃烧变为灰烬,灰烬的质量比纸的质量小3.在化学反应A + B→C + D中,若有12 g A参与反应,生成28 g C和2 g D,则参加反应的B的质量为( )A.8 gB.18 gC.28 gD.30 g4.某化学反应可以用A+B→C+D表示,若反应前有12gA和8gB,反应后生成10gC,A消耗完全,B剩余2g,则生成D的质量为( )A.8 gB.10gC.18gD.20 g5.在化学反应A+B→C+D中,某固体混合物内有A、B、C三种物质各10g,将其充分反应,B 完全消耗,C的质量增加8g,生成了4gD,则参加反应的A和B的质量比为( )A.5:1B.1:5C.6:5D.5:66.已知:生石灰+水→氢氧化钙,若ag生石灰加入bg水中充分反应后,则生成氢氧化钙的质量( )A.等于(a+b)gB.大于(a+b)gC.小于(a+b)gD.不大于(a+b)g7.化学反应前后,一定没有变化的是( )A.物质的种类B.物质的状态C.分子的种类和数目D.原子的种类和数目8.工业用盐亚硝酸钠(NaNO2)有毒,其外观与食盐极为相似,在隔绝空气和强热条件下,亚硝酸钠能分解放出一种红棕色气体,该气体可能是( )A.N2B.COC.NO2D.O29.某有机物在空气中完全燃烧,测得生成物中含有二氧化碳、水蒸气、二氧化硫,下列对该有机物的推断正确的是( )A.一定含有碳、氢、氧元素B.一定含有碳、氢、硫元素C.只含有碳、氢元素D.一定含有碳、氢、氧元素,可能含有硫元素10.关于化学反应C3H8+5O23CO2+4H2O的描述正确的是( )(相对原子质量:H-1,C-12,O-16)A.1个丙烷和5个氧气在点燃条件下,生成3个二氧化碳和4个水B.1g丙烷和5g氧气在点燃条件下,生成3g二氧化碳和4g水C.44个丙烷分子与160个氧分子完全反应,生成132个二氧化碳分子和72个水分子D.44份质量的丙烷与160份质量的氧气完全反应,生成132份质量的二氧化碳和72份质量的水。
1 2014届初三基础天天练 海淀期末 总分41 我们的目标39 四、单项填空(共13分,每小题1分) 22. Tom Hanks is a great actor and we love ________ movies. A. he B. his C. him D. himself 23. Peter is playing volleyball _____ the playground. A. of B. to C. on D. for 24. ______ sweater do you prefer, the yellow or the green one? A. Which B. Whose C. How many D. How much 25. It is snowing! Please put on your coat, ______ you will catch a cold. A. and B. so C. or D. but 26. This term everyone in my class works much _______ than before. A. hard B. harder C. hardest D. the hardest 27. Rosa likes music _______ is quiet and gentle. A. that B. what C. who D. where 28. I‘d like to go ________ for my summer vacation. A. anywhere amazing B. amazing somewhere C. amazing anywhere D. somewhere amazing 29. Next Sunday, I _____ at the library with my classmates. A. study B. am going to study C. have studied D. had studied 30. I ______ Mike since he moved to another town with his family. A. didn‘t see B. don‘t see C. haven‘t seen D. won‘t see 31. Kathy enjoys _______ mountains in autumn. A. climb B. climbs C. to climb D. climbing 32. The doctor asked me not __________ too many candies. It‘s bad for my teeth. A. to eat B. eat C. eating D. eats 33. The first television ________ in America in 1927. A. makes B. made C. is made D. was made 34. — Can you tell me _______ yesterday? — By the time I got outside, the bus had already left. A. why you come late B. why did you come late C. why you came late D. why do you come late 七、阅读短文,根据短文内容,从短文后的五个选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。(共8分,每小题2分) Toys are something that can be used for play. 60 . Playing with toys is often thought to be an enjoyable way of training children for life. Toys and games are important when children are growing up and learning about the world around them. Before 1970, most toys were made of metal and wood. 61 . Toys include balls, plastic cars and dolls. Some people think video games are also toys. 62 . The beginning of the word ―toy‖ is not known. However, it is thought that it was first used in the 14th century. The earliest toys were often made from rocks, sticks or clay(粘土). 63 . In old Rome, children played with dolls made of clay, sticks and yo-yos. In ancient Greece, girls were asked to give up the toys to the gods when they were about fourteen years old. They would offer their dolls in a temple on the day they got married. 2
A. Toys were invented many years ago B. Toys are usually played with by children and pets C. Toys should have names D. But now they are mostly made of plastic (塑料) E. In old Egypt, children played with dolls made of stone and wood 八、阅读短文,根据短文内容回答问题。(共10分,每小题2分) When he was only 14 years old, William Kamkwamba started to dream up a windmill that would produce electricity for his village in Malawi in Africa. What was the trouble? As Malawi was experiencing the worst famine(饥荒) in 50 years, William had to drop out of school because his family could not afford $80 every year. This meant he not only had no money to buy the parts, but also had no formal education to teach him how to put them together. However, he wouldn‘t give up. Strong-willed, he headed to the local library and read its limited (有限的) selection of textbooks, then gathered some waste parts — a bicycle engine, bamboo poles(杆), a tractor fan, rubber belts, a bike chain ring — and brought his dream to life, building a working windmill. It took him five years to perfect the design. And he went on to found the Moving Windmills Project in 2008 to foster(促进) economic development and education projects in the countryside in Malawi. In 2009, William shared his moving story in a book. Now, the story of creativity is being adapted (改编) for young hearts and minds in the beautifully pictured book. William‘s story shines with all the more cheerfulness in the hands of 27-year-old artist Elizabeth Zunon.Her rich and romantic paintings excite the young readers with wonderful abilities. 64. When did William start to dream up a windmill?
65. Why did William have to drop out of school? 66. How long did it take William to perfect his design? 67. What happened in 2009? 68. What kind of boy do you think William is? 九、完成句子(共10分,每小题2分) 69. 让我们制定一个新年计划吧。 __________________think up a New Year‘s plan. 70. 我会尽可能快地给你回信。 I will write back to you ___________________________. 71. 这本书如此有趣,以至于我读了两遍。 The book is ______________________________ I have read it twice. 72. 去年夏天,哥哥花了两周在澳大利亚旅行。 Last summer, my brother _______________________________ in Australia. 73. 我认为家长没必要阻止孩子在写完作业后听音乐放松一下。 _______________________________________ music to relax after they finish homework.