定从练习09-3-27

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三年级数学思维训练[1]1

三年级数学思维训练[1]1
50-三年级期末复习与检测4
整数计算综合
还原问题
数阵图初步
竖式问题
几何图形简拼
路程、时间、速度
01-整数计算综合(1)
02-整数计算综合(2)
03-还原问题(1)
04-还原问题(2)
05-数阵图初步(1)
06-数阵图初步(2)
07-竖式问题(1)
08-竖式问题(2)
09-竖式问题(3)
10-竖式问题(4)
37-长度计算1
38-长度计算2
39-长度计算3
40-角度的计算1
41-角度的计算2
42-角度的计算3
43-找位置1
44-找位置2
火柴棍算式与生活趣题
三年级期末复习与检测
45-火柴棍算式与生活趣题1
46-火柴棍算式与生活趣题2
47-三年级期末复习与检测1
48-三年级期末复习与检测2
49-三年级期末复习与检测3
11-几何图形简拼(1)
12-几何图形简拼(2)
13-几何图形简拼(3)
14-几何图形简拼(4)
15-路程、时间、速度(1)
16-路程、时间、速度(2)
17-路程、时间、速度(3)
18-路程、时间、速度(4)
行程中的线段图
简单抽屉原理
基本直线形面积公式
底、高的选取与组合
变倍问题
和差倍中的分组比较
19-行程中的线段图(1)
复杂数阵图
有特殊要求的挑选
捆绑法与插空法
最值问题一
40-多次往返相遇与追与1
41-多次往返相遇与追与2
42-多次往返相遇与追与3
43-多次往返相遇与追与4
44-从洛书到幻方1
45-从洛书到幻方2

二建继续教育课后练习

二建继续教育课后练习

1/关于实际竣工工期的认定,下列()不是正确的。

A.按照协商确定的时间计算B.按照验收合格之日计算C.按照转移占有之日计算D.按照提交竣工报告之日计算答案错误,正确答案是D2-建设工程施工合同无效,且建设工程竣工验收不合格的,下列()说法是正确的。

A.修复后的建设工程竣工验收合格,发包人请求承包人承担修复费用,应予支持。

B.修复后的建设工程竣工验收合格,发包人请求承包人承担修复费用,不予支持。

C.修复后的建设工程竣工验收不合格,承包人请求支付工程价款,应予支持。

D.因建设工程不合格造成的损失,发包人有过错的,不用承担相应的民事责任。

答案错误,正确答案是A3-下列()不是建设施工合同无效的法律后果。

A.恢复原状B.返还财产C.折价补偿D.扣除利润D4-下面()属于无效合同的类型。

A.恶意串通,损害他们合法权益的B.以虚假的意思表示实施的民事法律行为无效的C.违反法律强制性规定的D.违反行政法规强制性规定的E.违背工序良俗的答案错误,正确答案是ABCDE5-没有资质的实际施工人借用有资质的建筑施工企业名义的建设施工合同认定无效。

A.正确B.错误A6-建设工程必须进行招标而未招标或者中标无效的建设施工合同认定有效。

A.正确B.错误B7-承包人应当在合理期限内行使建设工程价款优先受偿权,但最长不得超过()个月,自发包人应当给付建设工程价款之日起算。

A.6B.9C.12D.18答案错误,正确答案是D8-关于建设工程价款优先受偿权的说法,正确的是()。

A.优先受偿权的行使期限为6个月,自工程实际完工之日起算B.抵押权优先于优先受偿权C.优先受偿权的范围包括逾期支付建设工程价款的违约金D.承包人就商品房享有的工程价款优先受偿权不得对抗已支付全部或者大部分购买商品房款项的买受人答案错误,正确答案是D9-()属于工程款优先权的担保债权的范围。

A.利润B.逾期支付建设工程价款的利息C.违约金D.违约损害赔偿金E.签证款答案错误,正确答案是AE10-发包人未按照约定支付价款的,承包人可以催告发包人在合理期限内支付价款。

高考英语(深化复习命题热点提分)专题09 名词性从句-人教版高三全册英语试题

高考英语(深化复习命题热点提分)专题09 名词性从句-人教版高三全册英语试题

专题09 名词性从句1.The best moment for the football star was ________ he scored the winning goal.A. whereB. whenC. howD. why【答案】B【解析】此题考查表语从句连接词。

考查方式为连接词的选择。

句意:对于一个足球明星来说,进球得分的时刻是最好的时刻。

根据题干前半局部中的“moment〞一词推断,后面应该说的是“…的时候〞,所以此题选B。

2.From space, the earth looks blue. This is ________ about seventy-one percent of its surface is covered by water.A.why B.howC.because D.whether【答案】C3. As John Lennon once said,life is_____ happens to you while you are busy making other plans.A. whichB.thatC. whatD. where【答案】C【解析】考查名词性从句用法。

此题主句是一个表语从句,表语从句中缺少主语,故用what来引导。

在名词性从句中,当从句缺少主语、宾语或表语时,一般用关系词what来引导。

句意:正如约翰·列侬曾经说过,当我们正在为生活疲于奔波时,生活已离我们远去。

故C正确。

4.—What a mess! You are always so lazy!—I’m not to blame, mum. I am ________ you have made me.A. howB. whatC. thatD. who【答案】B【解析】考查名词性从句用法。

此题考查的是表语从句,注意动词make后接双宾语,即make sb. sth.故用关系词what来引导。

高考英语语法填空名校好题100篇:专题09 日常生活故事主题(一)基础篇(原卷版)

高考英语语法填空名校好题100篇:专题09  日常生活故事主题(一)基础篇(原卷版)

专题09-日常生活故事主题(一)---基础篇距离高考还有一段时间,不少有经验的老师都会提醒考生,愈是临近高考,能否咬紧牙关、学会自我调节,态度是否主动积极,安排是否科学合理,能不能保持良好的心态、以饱满的情绪迎接挑战,其效果往往大不一样。

以下是本人从事10多年教学经验总结出的以下学习资料,希望可以帮助大家提高答题的正确率,希望对你有所帮助,有志者事竟成!养成良好的答题习惯,是决定高考英语成败的决定性因素之一。

做题前,要认真阅读题目要求、题干和选项,并对答案内容作出合理预测;答题时,切忌跟着感觉走,最好按照题目序号来做,不会的或存在疑问的,要做好标记,要善于发现,找到题目的题眼所在,规范答题,书写工整;答题完毕时,要认真检查,查漏补缺,纠正错误。

总之,在最后的复习阶段,学生们不要加大练习量。

在这个时候,学生要尽快找到适合自己的答题方式,最重要的是以平常心去面对考试。

英语最后的复习要树立信心,考试的时候遇到难题要想“别人也难”,遇到容易的则要想“细心审题”。

越到最后,考生越要回归基础,单词最好再梳理一遍,这样有利于提高阅读理解的效率。

另附高考复习方法和考前30天冲刺复习方法。

Passage 1(2023秋·河南南阳·高三统考期末)阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Ghanim Al-Muftah was born with a rare condition ___1___ (know) as Caudal Regression Syndrome (CRS). The disease causes its patients to be born without the lower half of the body. Naturally, one would expect Ghanim to use ___2___ wheelchair, but he insists on moving around on his hands because he believes that he should make use of everything ___3___ which he is blessed rather than focus on what he doesn’t have.Ghanim ___4___ (encounter) all kinds of challenges in his life, especially extensive medical interventions and surgery. But he has a firm belief ___5___ with faith, commitment and hard work he will be free to accomplish his ambitions.Despite ___6___ (he) disability, Ghanim has overcome extreme difficulties with ___7___(positive) and leadership, and this is what makes him an exceptional character. He is a ___8___ (motivate) speaker, goodwill ambassador and entrepreneur. He is followed by millions all over his social media platforms and ___9___ (show) to the world how life with a disability can be fulfilling and worthwhile. His story has served _____10_____ (amaze) and inspire people across the world. He is a prominent and exemplary individual of today’s youth and an advocate for disabled people across the world.Passage 2(2022秋·四川德阳·高三四川省绵竹中学校考阶段练习)阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

概率统计练习册习题解答(定)

概率统计练习册习题解答(定)

概率统计练习册习题解答(定)习题1-1 样本空间与随机事件A,B,C 为三个事件,则A,B,C 中至少有一个不发 ”这一事件可表示为(D )(A ) ABU AC U BC (B ) AU BUC ( C ) ABC U ABC U ABC ( D )BUC 2)设三个元件的寿命分别为T”T 2,T 3,并联成一个系 ,则只要有一个元件正常工作则系统能正常工作, 件 系统的寿命超过t”可表示为(D )B TT 2T 3t C min T I ,T 2,T 3 t用集合的形式表示下列随机试验的样本空间 机事件A : 1)同时掷三枚骰子,记录三枚骰子的点数之和, 件A 表示 点数之和大于10”。

O2)对目标进行射击,击中后便停止射击,观察射 击的次数;事件A 表示 射击次数不超过5次o3)车工生产精密轴干,其长度的规格限是15±0.3。

现抽查一轴干测量其长度,事件 A 表示测1.选择题(1)设 生AUT i T 2 T 3tTT 2T3t 2. 随( 事 解: =3,4,5, ,18; A = 11,12, ,18解: =簽2,3,- A = ^2,3,4,5量长度与规格的误差不超过0.1。

O3 .设A ,B ,C 为三个事件,用A ,B ,C 的运算关0.3; A= x; x-15 0.1x; x -15 解:系表示下列各事件:(1)A, B, C 都发生:解:ABC;(2)A, B, C都不发生:解:ABC(3)A发生,B与C不发生:解:A§C (或A-B-C);(4)A, B, C中至少有一个发生:解:AuBuC(5)A, B, C中不多于两个发生:解:刁MUJ4.设某工人连续生产了4个零件,人表示他生产的件:(1 ) 只有一个是次品;A( A2A3A4 u A】A? A3A4 u A t A2 A3A4U A!A2A3A4(2)至少有一个次品;A-55uA。

(3)恰好有两个是次品;1.填空题(1)已知AuB, P(A) = 0.4 9 P(B) = 0.6 9贝|| P(A)=_0.6, P(AB)=0.4,P(JU^)=_0.6, P(AB) =_0.2 , P(AB) = 0 9 P(A B)=A P42A3 A4 uA] A2J3 A4 uAj A2A3J4A2 A3A4 u J]J2J3A4<J A}A2A3A4(4)至多有三个不是次品;A, u A2 u A? u A4 0习题1-2机事件的概率及计算第,个零件是正品(i = 1,2,3,4 ), 试用4表示下列各事0.4 o(2)设事件/与B互不相容,P(A) = 0A9 P(B) = 0.3,贝!| P(AB)=0.3 9 P(A\JB)= 0.6 o(3)盒子中有10个球,其中3个红球,接连不放回抽取五次,第一次抽到红球的概率 三次抽到红球的概率 4) 一批产品由45件正品、5件次品组成,现从中 任取3件产品,其中恰有 1件次品的概率为5)某寝室住有6名学生,至少有两个同学的生日 恰好在同一个月的概率为0.3 , 0.3 。

英语语法填空答题技巧

英语语法填空答题技巧

英语语法填空答题技巧语法填空是通过语篇在语境中考察语法知识的运用能力。

我们在解题前应快速浏览短文掌握大意,有把握的空格可以先进行填写。

小编在这里整理了相关资料,希望能帮助到您。

高考英语语法填空答题技巧一、纯空格试题的解题技巧纯空格填空题主要是填冠词、介词、代词、连接词(含从属连词和并列连词)等虚词。

首先,分析句子结构,根据句子所缺成分确定填哪类词。

然后,根据句子意思,确定具体填什么词;或根据两句间的逻辑关系确定具体用哪个连词。

技巧1:在简单句和并列句中,若句子缺主语或宾语,一定是填代词。

例1:I can’t send a message to Kenya whenever I want to, and __1__ gets there almost in a second.技巧2:名词前面,若没有限定词(冠词、形容词性物主代词、不定代词等),很可能是填限定词。

例2:It is said that a short-tempered man in the Song Dynasty was very anxious to help__2__ rice crop grow up quickly.技巧3:名词或代词在句中不作主语、表语或动词的宾语时,其前面,一定是填介词。

例3:…who should have the honour of receiving me __3__ a guest in their house.技巧4: 若两个或几个单词或短语之间没有连词,可能是填连词。

例4:…two w orld-famous artists, Pablo Picasso __4__Cabdido Poitinari, which are worth millions of dollars.技巧5:若两个句子(即两个主谓结构)之间没有连词,也没有分号或句号,一定是填并列连词(连接并列的句子)或从属连词(连接定语从句、名词性从句和状语从句)。

高中数学《对数与对数运算》同步练习9 新人教A版必修1

高中数学《对数与对数运算》同步练习9 新人教A版必修1

2.2 对数函数2.2.1 对数与对数运算1.以下说法不正确的是( )A .0和负数没有对数B .对数值可以是任意实数C .以a(a>0,a≠1)为底1的对数等于0D .以3为底9的对数等于±22.下列指数式与对数式互化不正确的一组是( )A .e 0=1与ln1=0B .8-13=12与log 812=-13C .log 39=2与912=3 D .log 77=1与71=73.有以下四个结论:①lg(lg10)=0;②ln(lne)=0;③若10=lgx ,则x =100;④若e =lnx ,则x =e 2.其中正确的是( )A .①③ B.②④ C.①② D.③④4.计算:(1)lg1+lg10+lg100;(2)lg0.1+lg0.01+lg0.001.课堂巩固1.对数式x =ln2化为指数式是( )A .xe =2B .e x =2C .x 2=eD .2x =e2.下列指数式与对数式互化不正确...的一组是( ) A .100=1与lg1=0B .27-13=13与log 2713=-13C .log 24=2与24=2D .log 55=1与51=53.若log a 7b =c ,则a ,b ,c 之间满足( )A .b 7=a cB .b =a 7cC .b =7a cD .b =c 7a4.(2009河南六市第一次联考,文3)设f(x)=1+log 2x 1-x ,则f(15)+f(45)的值为( ) A .1 B .2 C .3 D .45.给出以下三个命题:①对数的真数是非负数;②若a>0且a≠1,则log a 1=0;③若a>0且a≠1,则log a a =1.其中正确命题的序号是__________.6.log 155=a ,log 3b =2,则b -a =__________. 7.计算:log 2748+log 212-12log 242.1.计算2log 525+3log 264-8log 71的值为…( )A .14B .8C .22D .272.若log 2[log 12(log 2x)]=log 3[log 13(log 3y)]=log 5[log 15(log 5z)]=0,则x 、y 、z 的大小关系是…( )A .z<x<yB .x<y<zC .y<z<xD .z<y<x3.2log a (M -2N)=log a M +log a N ,则M N的值为… ( ) A.14B .4C .1D .4或14.若函数f(x)(x>0)满足f(x y)=f(x)-f(y),f(9)=8,则f(3)等于( ) A .2 B .-2C .1D .45.已知ab>0,下面四个等式中:①lg(ab)=lga +lgb ;②lg a b =lga -lgb ;③12lg(a b )2=lg a b ;④lg(ab)=1log ab 10. 其中正确命题的个数为( )A .0B .1C .2D .36.已知x 2+y 2-4x -2y +5=0,则log x (y x )的值是( )A .1B .0C .xD .y7.已知lga =2.431 0,lgb =1.431 0,则b a等于… ( )A.110B.1100C .10D .1008.已知log a 2=m ,log a 3=n ,则a 2m -n =__________.9.设a ,b 同号,且a 2+2ab -3b 2=0,则log 3(a 2+ab +b 2)-log 3(a 2-ab +b 2)=__________.10.(2008广东北江期末考试,5)设函数f(x)=⎩⎪⎨⎪⎧ 2-x ,log 4x ,x<1,x>1,求满足f(x)=14的x 的值.11.求下列各式中的x 值:(1)log 8x =-23;(2)log x 27=34;(3)x =log 128.12.(1)已知3a =2,用a 表示log 34-log 36;(2)已知log 32=a,3b =5,用a 、b 表示log 330.答案与解析2.2 对数函数2.2.1 对数与对数运算第一课时课前预习1.D 2.C 3.C4.解:(1)原式=0+1+2=3.(2)原式=-1-2-3=-6.课堂巩固1.B 2.C3.B ∵log a 7b =c ,∴7b =a c ,b =a 7c .4.B f(15)+f(45)=1+log 214+1+log 24=2. 5.②③ ①对数的真数为正数,故①错;②∵a 0=1,∴log a 1=0,②对;③∵a 1=a ,∴log a a =1,③对.6.10 ⎩⎪⎨⎪⎧⎭⎪⎬⎪⎫(15)a =5⇒a =-1b =32=9⇒b -a =10. 7.解:原式=12(log 27-log 248)+log 23+2log 22-12(log 27+log 22+log 23)=12log 27-12log 23-12log 216+log 23+2-12log 27-12-12log 23=-12. 课后检测1.C 原式=2×2+3×6-8×0=22.2.A 由log 5[log 15(log 5z)]=0, 可知log 15(log 5z)=1,log 5z =15,可得z =515.同理可得x =212,y =313. ∵(212)10=25=32,(515)10=52=25, ∴(212)10>(515)10.∴x>z. 同理可得y>x.综上可知y>x>z.3.B 由题意,得M>0,N>0,M -2N>0.故M N>2,显然只有B 符合条件. 4.D ∵f(3)=f(93)=f(9)-f(3), ∴f(3)=12f(9)=4. 5.B 若a<0,b<0,则①②不成立;若ab =1,则④不成立.6.B ∵(x-2)2+(y -1)2=0,∴x=2,y =1,y x =1,log x (y x )=log 21=0.7.A 依据a x =N ⇔log a N =x(a>0且a≠1),有a =102.431 0,b =101.431 0,∴b a =101.431 0102.431 0=101.431 0-2.431 0=10-1=110. 8.43∵log a 2=m ,log a 3=n , ∴a m =2,a n =3.∴a 2m -n =a 2m a n =(a m )2a n =223=43. 9.1 ∵a ,b 同号,∴b≠0.将方程a 2+2ab -3b 2=0两边同除以b 2,得(a b )2+2(a b)-3=0, ∴(a b +3)(a b-1)=0. 解得a b =1或a b=-3(舍去). ∴a=b.∴log 3(a 2+ab +b 2)-log 3(a 2-ab +b 2)=log 3(3a 2)-log 3a 2=log 33=1.10.解:当x∈(-∞,1)时,由2-x =14,得x =2,但2∉(-∞,1),舍去;当x∈(1,+∞)时,由log 4x =14,得x =2,2∈(1,+∞).综上所述,x = 2. 11.解:(1)由log 8x =-23,得 x =8-23=(23)-23=2-2=14. (2)由log x 27=34,得x 34=27=33, ∴x 14=3.∴x=34=81. (3)由x =log 128,得(12)x =8=23=(12)-3, ∴x=-3.点评:在解决一些对数问题时,若能将其转化为指数式的形式,运算更方便.解未知数处于指数位置的方程时,可运用指数函数的性质去解;解未知数处于底数位置的方程时,可运用开方(根式运算)的方法求未知数的值.12.解:(1)∵3a =2,∴a=log 32.∴log 34-log 36=log 323=log 32-1=a -1. (2)∵3b =5,∴b=log 35.又∵log 32=a ,∴log 330=12log 3(2×3×5)=12(log 32+log 33+log 35)=12(a +b +1). 点评:指数式与对数式是同一个式子的两种不同表现形式,它们之间的联系体现了数学中的转化思想.转化的依据是a b =N ⇔b =log a N(a>0,且a≠1).第二课时1.已知a =lgx ,则a +3等于( )A .lg(3x)B .lg(x +3)C .lgx 3D .lg(1 000x)2.式子log 89log 23的值为( ) A.23 B.32C .2D .3 3.6413-(-23)0+log 28=________. 4.设集合A ={5,log 2(a +3)},B ={a ,b},若A∩B={2},求A∪B.课堂巩固1.若log 513·log 36·log 6x =2,则x 等于…( ) A .9 B.19C .25 D.1252.已知3a =5b =A ,若1a +1b=2,则A 等于( ) A .15 B.15C .±15D .2253.已知log 89=a ,log 25=b ,则lg3等于( )A.a b -1B.32(b -1)C.3a 2(b +1)D.3(a -1)2b4.下列各式正确的是( )①log 2(8-2)=log 28-log 22=2②log 2(8-2)=log 28log 22=3 ③log 284=log 28-log 24=1 ④log 28log 22=log 28-log 22=2 ⑤log 2[(-2)(-8)]=log 2(-2)+log 2(-8)=-4A .①④⑤B .③④C .③D .全正确5.1.10+3512-0.5-2+lg25+2lg2=________.6.设log b x -log b y =a ,则log b 5x 3-log b 5y 3=__________.7.(2009福建泉州毕业班质检,理11)已知函数f(x)=⎩⎪⎨⎪⎧ log 2x ,x>0,2x ,x≤0,若f(a)=12,则a =__________.8.解方程:lg(x +1)+lg(x -2)=lg4.9.求证:log a x log ab x=1+log a b.10.设M ={0,1},N ={11-a ,lga,2a ,a},问是否存在a 的值,使得M∩N={1}.1.已知log 72=p ,log 75=q ,则lg5用p 、q 表示为…( )A .pq B.q p +qC.1+pq p +qD.pq 1+pq2.(2008深圳高一期末考试,8)已知定义在实数集上的偶函数y =f(x)在区间(0,+∞)上是增函数,那么y 1=f(π3),y 2=f(3x 2+1)和y 3=f(log 214)之间的大小关系为( ) A .y 1<y 3<y 2B .y 1<y 2<y 3C .y 3<y 1<y 2D .y 3<y 2<y 13.若lga ,lgb 是方程2x 2-4x +1=0的两个根,则(lg a b)2的值等于( ) A .2 B.12 C .4 D.144.若log a b =log b a(a≠b),则ab 等于( )A .1B .2 C.14D .4 5.下列给出了x 与10x 的七组近似对应值:假设在上表的各组对应值中,有且仅有一组是错误的,它是第__________组.( )A .二B .四C .五D .七6.lg3+2lg2-1lg1.2=__________. 7.已知lg6=0.778 2,则102.778 2=__________.8.计算:614-(π-1)0-(827)-13+log 318-log 32=__________. 9.2008年5月12日,四川汶川发生里氏8.0级特大地震,给人民的生命财产造成了巨大的损失.里氏地震的等级最早是在1935年由美国加州理工学院的地震学家里特判定的.它与震源中心释放的能量(热能和动能)大小有关.震级M =23lgE -3.2,其中E(焦耳)为以地震波的形式释放出的能量.如果里氏6.0级地震释放的能量相当于1颗美国在二战时投放在广岛的原子弹的能量,那么汶川大地震所释放的能量相当于__________颗广岛原子弹.10.一种放射性物质不断变化为其他物质,每经过一年的剩余质量约是原来的75%,估计约经过多少年,该物质的剩余量是原来的13(结果保留1位有效数字)?(lg2≈0.301 0,lg3≈0.477 1)11.若a 、b 是方程2(lgx)2-lgx 4+1=0的两个实根,求lg(ab)·(log a b +log b a)的值.12.甲、乙两人解关于x 的方程:log 2x +b +c·log x 2=0,甲写错了常数b ,得到解为14和18;乙写错了常数c ,得到解为12和64,求b ,c 都正确的情况下该方程的解.答案与解析第二课时课前预习1.D a +3=lgx +lg1 000=lg(1 000x).2.A 原式=log 29log 28÷log 23 =2log 233÷log 23=23. 3.6 原式=4-1+3=6.4.解:∵A∩B={2},∴2∈A 且2∈B.∴log 2(a +3)=2.∴22=a +3.∴a=1,则b =2.故A ={5,2},B ={1,2}.∴A∪B={1,2,5}.课堂巩固1.D 由换底公式,得-lg3lg5·lg6lg3·lgx lg6=2,lgx =-2lg5,x =5-2=125. 2.B ∵3a =5b =A>0,∴a=log 3A ,b =log 5A.由1a +1b=log A 3+log A 5=log A 15=2,得A 2=15,A =15. 3.C ∵log 89=a ,∴lg9lg8=a.∴log 23=32a. lg3=log 23log 210=log 231+log 25=3a 2÷(1+b)=3a 2(b +1). 4.C5.7 原式=1+23-4+lg100=7.6.3a ∵log b x -log b y =a ,∴log b (x y)=a. ∴log b 5x 3-log b 5y 3=log b (5x 35y 3) =log b (x y )3=3log b (x y)=3a. 7.-1或 2 由log 2x =12,得x =2;由2x =12,得x =-1.均符合题意. 8.解:原方程可化为lg(x +1)(x -2)=lg4,∴(x+1)(x -2)=4.解得x =-2或3.经检验,原方程的根为3.9.证法一:设log a x =p ,log ab x =q ,log a b =r ,则x =a p ,x =(ab)q =a q b q ,b =a r .∴a p =(ab)q =a q(1+r),从而p =q(1+r).∵q≠0,∴p q =1+r ,即log a x log ab x=1+log a b. ∴原式成立.证法二:由换底公式,左边=log a x log ab x =log x ab log x a=log a ab =1+log a b =右边. ∴原式成立.10.解:不存在a 的值使得M∩N={1}成立.若lga =1,则a =10,此时,11-a =1=lga ,这与集合N 中元素的互异性矛盾;若2a =1,则a =0,此时lga 无意义;若a =1,则lga =0,此时M∩N={0,1},与题设不符;若11-a =1,则a =10,lga =1=11-a ,这与集合N 中元素的互异性矛盾. 综上所述,不存在a 的值使得M∩N={1}成立.课后检测1.B lg5=log 75log 72+log 75=q p +q. 2.A f(3x 2+1)≥f(3),f(log 214)=f(-2)=f(2).∵π3<2<3,且函数y =f(x)在区间(0,+∞)上是增函数,∴y 1<y 3<y 2. 3.A 由根与系数的关系可知lga +lgb =2,lgalgb =12. 于是(lg a b)2=(lga -lgb)2 =(lga +lgb)2-4lgalgb =22-4×12=2. 4.A 由lgb lga =lga lgb,得lga =lgb 或lga =-lgb. 解得a =b(舍去),a =1b,即ab =1. 5.A 根据指数式与对数式的互化公式,将已知表格转化为下表:∵lg2+lg5=0.301 03+0.698 97=1,∴第一组、第三组对应值正确.又显然第六组正确,∵lg8=3lg2=3×0.301 03=0.903 09,∴第五组对应值正确.∵lg12=lg2+lg6=0.301 03+0.778 15=1.079 18, ∴第四组、第七组对应值正确.∴只有第二组错误.6.1 原式=lg3+lg4-lg10lg1.2=lg1.2lg1.2=1. 7.600 ∵lg6=0.778 2,∴100.778 2=6.∴102.778 2=102·100.778 2=100×6=600.8.2 原式=52-1-(278)13+log 3182=52-1-32+log 39=log 39=log 332=2. 9.1 000 设里氏8.0级,6.0级地震释放的能量分别为E 2、E 1,则8-6=23(lgE 2-lgE 1),即lg E 2E 1=3. ∴E 2E 1=103=1 000,即汶川大地震所释放的能量相当于1 000颗广岛原子弹. 10.解:设这种放射性物质最初的质量是1,经过x 年后,剩余量是y ,则有y =0.75x .依题意,得13=0.75x ,即x =lg 13lg0.75=-lg3lg3-lg4=lg32lg2-lg3=0.477 12×0.301 0-0.477 1≈3.8. ∴估计约经过4年,该物质的剩余量是原来的13. 11.解:原方程可化为2(lgx)2-4lgx +1=0.设t =lgx ,则方程化为2t 2-4t +1=0,∴t 1+t 2=2,t 1·t 2=12. 又∵a、b 是方程2(lgx)2-lgx 4+1=0的两个实根,∴t 1=lga ,t 2=lgb ,即lga +lgb =2,lga·lgb=12. ∴lg(ab)·(log a b +log b a)=(lga +lgb)·(lgb lga +lga lgb) =(lga +lgb)·(lgb)2+(lga)2lga·lgb=(lga +lgb)·(lga +lgb)2-2lga·lgb lga·lgb=2×22-2×1212=12, 即lg(ab)·(log a b +log b a)=12.12.解:由甲可知⎩⎪⎨⎪⎧ log 214+b +c·log 142=0,log 218+b +c·log 182=0, 即⎩⎪⎨⎪⎧ -2+b -12c =0, ①-3+b -13c =0. ② 由①-②,得1-16c =0,∴c=6. 由乙可知⎩⎪⎨⎪⎧log 212+b +c·log 122=0,log 264+b +c·log 642=0, 即⎩⎪⎨⎪⎧ -1+b -c =0, ③6+b +16c =0. ④由③+④×6,得7b +35=0,∴b=-5.综上,方程为log 2x +6log x 2-5=0,即(log 2x)2-5log 2x +6=0,∴log 2x =2或log 2x =3.∴x=4或x =8,即原方程的解为4或8.点评:解对(指)数方程时,通常先将给定的方程转化为同底数的对(指)数方程的形式.因为真数必须大于零,利用对数的运算法则进行化简的过程易产生增根,所以解对数方程要注意检验.。

定语从句及五种基本句型

定语从句及五种基本句型

定语从句专题一、基本概念:在复合句中,修饰某一名词或代词的从句叫定语从句。

如:Do you know the man who spoke at the meeting just now?That is the house where he lived ten years ago.定语从句所修饰的词叫先行词;定语从句一般用关系代词或关系副词来引导,关系词放在先行词与定语从句之间起连接作用,同时又作从句中的一个成分。

引导定语从句的关系代词有:that, who, whom, whose, which;关系副词有:when, where, why.二、关系词的用法:(一)关系代词的用法:1.作主语用who, which和that, 如:He is the man _______ lives next door.The train ________ has just left is for Shenzhen.2.作宾语用whom, who, which, that, 如:The man _________we have just seen is a famous writer.Where is the book _________ I bought last week?3.作定语用whose, 如:(a) He is the man ________ car was stolen last week.(b) It was a meeting ________ importance I did not realize at that time.注:“whose +名词中心词”这一结构在定语从句中既能作主语(如上a句),又能作宾语(如上b句)。

whose 的先行词常用来指人,但有时也可以用来指具体事物或抽象概念,这时可以与of which 结构互换,词序是:“名词+of which”,如:They came to a house whose back wall had broken down.. (= the back wall of which) He’s written a book the name of which I’ve completely forgotten. (= whose name) 4.作表语只用that ,它既可以指人,也可以指物,但时常省略。

名词性从句专练

名词性从句专练

专项训练:名词性从句练习Ⅰ. 用名词性从句的连接词填空。

1. _______ made me happy is that he has changed his mind.2. —I drove to Zhuhai for the air show last week.—Is that _________ you had a few days off ?3. _______ leaves the room last should remember to turn off the lights.4. I’m too busy to buy you a present, so you can use the money I give you tobuy ______ you like.5. —What is that building?—That’s _______ the garden equipment is stored.6. He made it clear ______ he will not give in.7. It never occurred to me_____ you could succeed in persuading him tochange his mind.8. The reason why he didn’t come was ______he was ill.9. It looks ______ he was sleeping, but he is listening carefully with his eyes closed.10. ______ team will win the match is still unknown, but I think our team will win.11. His success was because of.the fact ________ he had been working hard.12.________ makes mistakes must correct them.13. The reason why I didn't go to Shanghai was ________ I got a new job.14. It worried her a bit ____ her hair was turning grey.15. Henry killed the dog. I'll ask him ________ he did that.16. Have you seen Henry lately My boss wants to know ________ he is getting along.17. It is generally considered unwise to give a child ____ he or she wants.18. He asked me ________ was the matter with me. 19. I am sure ________ he said is true.20. They came to the conclusion ________ not all things can be done by a computer.21. Why the explosion occurred was ________ the laboratory attendant had been careless.22. I don't doubt ________ he'll come.23.----"Why did you go to the wrong class, Mr. Wang "-------"Well, I forget _______ room I was supposed to go to."24. Output is now six times ________ it was before liberation.25._______ surprised me most was ________ such a little boy of seven could play the violin so well.26. We gave him ________ help we could.27. She is pleased with what you have given him and ________ you have told him.28. Excuse me would you please tell me ________ the sports meet is to take place. 29. Do you happen to know ________ size shoes he wears30. Do you know ________ the population of the world is31. Would you go and see ________ is happening outside32. The little boy ate ________ his mother gave him.33. The city is no longer ________ it used to be34.________ we go swimming every day does us a lot of good.35.One of the men held the view ________what the book said was right.36. I have no idea ________ or not he has finished the work.37. Is this ________ we met each other two years ago38. It is thought ________ Bob drives badly.39.We all know the truth that _______ there are air, water and sunlight ,there are living things.40. They discussed ________ they could settle the problem without others'help.41. - May I borrow the ring- You can take _______ you like.42. He said that he was fond of _______ is beautiful.43. Do you know ________ he expects will give us a talk44. It's uncertain ________ the experiment is worth doing.45.________ the boy didn't take medicine made his mother angry.46.____ you don't like him is none of my business.47. You can't imagine ____ excited they were when they received these nice Christmas presents.48.____ we'll go camping tomorrow depends on the weather.49________he really means is ________he disagrees with us.50._________is going to do the job will be decided by the Party committee.51._______we'll finish translating the book depends on the time.52._______the house will be built will be discussed at tomorrow's meeting.53._______he won't go there is clear to all of us.54._______you come or not is up to you.55._______makes mistakes must correct them.56._______team will win the match is a matter of public concern.57.Three days later, word came ________our country had sent up another man-made satellite.58.The problem is ________will go to the meeting.59.It looks _______ it were going to rain.60.That is _______ he likes the place so much.61.That is ______ Lu Xun once lived.62.The fact _______ she had not said anything surprised all of us.63. I'm considering now is the money we need.64. It is well known that _________ a person eats causes changes in the body. 65. The energy is ________ makes the cells able to do their work.66. Jack was soon told ________ he did was not necessary.67. We should think carefully about ________ Mr. Needham said at the meeting.68. ________ you have seen things like these before doesn't matter.69. I asked her in English ________ she was, and she told me ________ she was an actress.70. She took it for granted ________ I'd be back home an hour ago.71. We think it possible ________ the local government will be able to solve the housing problem.72. Now there is a danger ________ the ground may fall in (沉下) under the heavy traffic.73. At that time I had no idea ________ I could hand it to him without being seen.74. Last Sunday he made a promise ________ he was free he would take me to Qingdao.75. I have almost forgotten ________ Mr. Taylor's face is like76. ________ surprised me most was ________she spoke Japanese so well77. ________ really interests Mary is to dance.78. We were greatly amused by ________ you told us.79. These computers are different from ________ we expect80. ________ T om liked to eat was different from ________ you had expected名词从句、定语从句专练1.______ surprised me most was the news ______ our team won.2.This is the only book ______ I want to read.3.The reason ______ I am so late is ______ I didn′t catch the bus.4.The problem ______ .that you thought about has been completely settled.5.The electric toy ______ .I bought for him last month has gone out of order.6.His head soon appeared out of one of the second storeywindows,from______ he could see nothing but tress.7.Every minute ______ is made full use of to study our lessons will do our students good.8.Will it be two months ______ we can get another one?9.After graduation we should go ______ our Party needs us most.10.There is a popular belief among parents ______ schools are no louger interested in handwriting.11.He lent me a lot of maney, without ______ I couldn’t buy the TV set.12.Water power stations are bulit ______ there are big water falls.13.The direction ______ a force acts can be changed. 14.Was it yesterday on ______ you received the letter from her?15.In the end she decided to sell the house ______ windows were almost broken.16.That ______ you lent me wasn’t _____ I wanted.17.On the desk lay a Chinese brush with ______ he had made drawing.18.We′ll never forget the days ______ we spent on the seashore.19.The beautiful church the tower of ______ we see there is very famous.20.The 11th Asian Games, ______ China won 183 gold medals,was held in the autumn of 1990.21.The only thing ______ is wrong with this is ______ a friend of mine said to me the other day.22.Who is the man ______ is talking with John?23.The farmer uses wood to build a house with ______ to store grains.24.I really don′t know ______ it was that I had my pocket picked.25.——Have you heard from Mary recently?——Yes,she said she was thinking ______ she should do next.26.Can you guess ______ that man is ?27.Tom told his aunt that he .had just been asked he was doing during the time when he was in the country.28.The reason ______ she gave for not being present was ______ the heavy snow prevented her coming.29.Air is to us ______ water is to fish.30.The free ticket will be sent to ______ comes first.31.______ is still unknown when the president will make a public speech.32.I don′t know ______ is ______ I was born.33.Many members ______ were present agreed to the plan.34.______ can be seen from his face,he is quite satisfied.定语从句和名词性从句高考题专练1.(09江苏)Because of the financial crisis, days are gone ____local 5-star hotels charged 6,000 yuan for one night.A. ifB. whenC. whichD. since2.(09福建)It’s helpful to put children in a situation they can see themselves differently.A. thatB. whenC. whichD. where3(09山东)Whenever I met her, ______was fairly often, she greeted me with a sweet smile.A. whoB. whichC. whenD. that4.(09陕西)Gun control is a subject _____ Americans have argued for a long time .A of whichB with whichC about whichD into which5. (09全国II)My friend showed me round the town, ______ was very kind of him.A. whichB. thatC. whereD. it6. (09浙江)I have reached a point in my life I am supposed to make decisions of my own.A. whichB. whereC. howD. why7. (09重庆)Life is like a long race _____we compete with others to go beyond ourselves.A. whyB. whatC. thatD. where8.(09北京)–What do you think of teaching, Bob?–I find it fun and challenging. It is a job ___ you are doing something serious but interesting.A. whereB. WhichC. WhenD. that9.(09四川)News came from the school office _______Wang Lin had been admitted to Beijing University.A. whichB. whatC. thatD. where10. (09江苏)Many young people in the West are expected to leave ____could be life' s most important decision -- marriage -- almost entirely up to luck.A. asB. thatC. whichD. what11.(09湖南)She is very dear to us. We have been prepared to do it takes to save her life.A. whicheverB. howeverC. whateverD. whoever12.(09江西)The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.A. whatB. whichC. thatD. though13.(09陕西)The how to book can be of help to wants to do the job.A whoB whomeverC no matter whoD whoever14.(09重庆)We should consider the students’ request ___the school library provide more books on popular science.A. thatB. whenC. whichD. where15.(09北京)At first he hated the new job but decided to give himself a few months to see ___ it got any better.A. whenB. howC. whyD. if16(08山东)_was most important to her, she told me, was her family.A. ItB. ThisC. WhatD. As17(08山东) Occasions are quite rare_I have the time to spend a day with my kids.A. whoB. whichC. whyD. when18. (08福建)_is known to us all is that the 2008 Olympic Games will take place in Beijing.A. ItB. WhatC. AsD. Which19 (08福建) By nine o' clock, all the Olympic torch bearers had reached the top of Mount Qomolangma , ______ appeared a rare rainbow soon.A. of whichB. on whichC. from whichD. above which20. (08安徽)All the neighbors admire this family _____the parents are treating their child like a friend.A. whyB. whereC. whichD. that21. (08浙江)Some children want to challenge themselves by learning a language different from_their parents speak at home.A. whatB. thatC. whichD. one22. (08 天津,) The last time we had great fun was_we were visiting the Water Park. .A. whereB. howC. whenD. why 23. (08江西) Later in this chapter cases will be introduced to readers_consumer complaints have resulted in changes in the law.A. whereB. whenC. whoD. which24. (08北京)I'll give you my friend's home address, ____I can be reached most evenings.A. whichB. whenC. whomD. where25.(08北京) The companies are working together to create____ they hope will be the best means of transport in the 21st century.A. whichB. thatC. whatD. who26. (08上海)As his best friend, I can make accurate guesses about ____ he will do or think.A. whatB. whichC. whomD. that27. (08上海)We went through a period ______communications were very difficult in the rural areas.A. whichB. whoseC. in whichD. with which28.(08重庆)They will fly to Washington,_they plan to stay for two or three days.A. whereB. thereC. whichD. when29. (08四川非延考区) For many cities in the world, there is no room to spread out further,_New York is an example.A. for whichB. in whichC. of whichD. from which30. (07 上海) ______ he referred to in his article was unknown to the general reader.A. ThatB. WhatC. WhetherD. Where31. (07 上海) The traditional view is ______ we sleep because our brain is ―programmed‖ to make us do so.A. whenB. whyC. whetherD. that32. (07 安徽) You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get _____in the future.A. that; whatB. what; /C. which; thatD. /; that33. (07 北京) —Where’s that report?—I brought it to you ____you were in Mr Black’s office yesterday.A. ifB. whenC. becauseD. before34.(07 湖南)Having checked the doors were closed , and _________ all the lights were off, the boy opened the door to his bedroom.A. whyB. thatC. whenD. where35.(07 天津)The seaside here draws a lot of tourists every summer. Warm sunshine and soft sands make ________ it is .A. whatB. whichC. howD. where36.(07 浙江)Why not try your lick downtown, Bob? That’s ______ the best jobs are.A. whereB. whatC. whenD. why37.(07 山东)—Where did you get to know her?—It was on the farm _________ we worked.A.that B.there C.which D.where 38.(07 安徽)Last week, only two people came to look at the house, ______wanted to buy it.A. none of themB. both of themC. none of whomD. neither of whom39.(07 江西)After graduation she reached a point in her career______ she needed to decide what to do.A. thatB. whatC. whichD. where40.(07 全国I)Some pre-school children go to a day care center, _______they learn simple games and songs.A. thenB. thereC. whileD. where41(07 上海)The thought of going back home was ______ kept him happy while he was working abroad.A.that B.all that C all what D.which42.(07 天津)Those successful deaf dancers think that dancing is an activity ________ sight matters more than hearing.A. whenB. whoseC. whichD. where43.(07 重庆)Human facial expressions differ from those of animals in the degree ______ they can be controlled on purpose.A. with whichB. to whichC. of whichD. for which问题单:。

超实用高考英语专题复习:专题 09-定语从句专题练习(含高考真题)

超实用高考英语专题复习:专题 09-定语从句专题练习(含高考真题)

超实用高考英语专题复习:专题09-定语从句专题练习距离高考还有一段时间,不少有经验的老师都会提醒考生,愈是临近高考,能否咬紧牙关、学会自我调节,态度是否主动积极,安排是否科学合理,能不能保持良好的心态、以饱满的情绪迎接挑战,其效果往往大不一样。

以下是本人从事10多年教学经验总结出的以下学习资料,希望可以帮助大家提高答题的正确率,希望对你有所帮助,有志者事竟成!养成良好的答题习惯,是决定高考英语成败的决定性因素之一。

做题前,要认真阅读题目要求、题干和选项,并对答案内容作出合理预测;答题时,切忌跟着感觉走,最好按照题目序号来做,不会的或存在疑问的,要做好标记,要善于发现,找到题目的题眼所在,规范答题,书写工整;答题完毕时,要认真检查,查漏补缺,纠正错误。

总之,在最后的复习阶段,学生们不要加大练习量。

在这个时候,学生要尽快找到适合自己的答题方式,最重要的是以平常心去面对考试。

英语最后的复习要树立信心,考试的时候遇到难题要想“别人也难”,遇到容易的则要想“细心审题”。

越到最后,考生越要回归基础,单词最好再梳理一遍,这样有利于提高阅读理解的效率。

另附高考复习方法和考前30天冲刺复习方法。

定语从句基础专练1用合适的关系词填空1.I still remember the day______we first met。

2.I still remember the day_________I spent with you in the countryside.3.Hangzhou is a city_____________there is a beautiful lake.4. Hangzhou is a city____________I visit most often.5.The reason__________he didn't come to school is_____he was ill6.This is the way__________he studies English.7Let's think of a situation___________this idiom can be used8.I know of a place_________we can swim.9.The boss,________employed many workers from Africa, earned a lot of money10.She was always watching TV,___________.made us angry.11._________ we know, the earth moves around the sun12. The earth moves around the sun,______we know13. Air,_______we breathe everyday, is made up of oxygen, nitrogen and other gases.14. She is going to spend the summer holidays in Qingdao.________she has some relatives.15. In the old days._______I was a little boy. the city had no industry to speak of。

英语定语从句专项练习及答案(三)

英语定语从句专项练习及答案(三)

在复合句中作定语,修饰主句中的某⼀名词或代词的从句,叫做定语从句。

被定语从句所修饰的词叫先⾏词,位于从句之前。

定语从句有关系代词that、which、who、whose、whom和关系副词when 、where、why引导.定语从句的基本结构为:先⾏词 + 关系代/副词 + 句⼦考点1. 关系代词: that, which, who, whom, whose 关系副词: when, where, why.a. that-既可指⼈,也可指物,作主语,不能省略;作宾语,可以省略;不引导⾮限定性定语从句There are lots of things ________ I need to prepare before the trip. (10河北)A. whoB. thatC. whomD. whose(答案: B)b. which-指物,作主语,不能省略;作宾语,可以省略.可引导⾮限定性定语从句。

This is the dictionary ________ Mum gave me for my birthday. (08河北)A. whichB. whatC. whoseD. whom(答案:A)Sorry, we don’t have the coat ________ you need. (09河北)A. whatB. whoC. whomD. which(答案:D)c. who-般指⼈,作主语,不能省略;作宾语,可以省略,(常⽤whom)Jamie is a young cook ________ wants to improve school dinners. (10天津)A. whoB. whoseC. whomD. which(答案:A)d. whose 作定语,表⽰所属关系。

I like the teacher ________ classes are very interesting and creative. (09兰州)A. whichB. whoC. whatD. whose(答案:D)e. when 作时间状语:When =介词 + whichShe will never forget the day when (=on which) she was married.f. where 作地点状语 where = 介词 + whichI want to know the place where (= in which) I was born.g. why 作原因状语, 其先⾏词常常是the reason. why = for whichThat is the reason why(= for which) I’m late.2. 当关系代词在定语从句中作主语时,定语从句的谓语动词形式由先⾏词定。

2024年高考化学总复习专题09氧硫及其化合物和环境保护习思用练习含解析

2024年高考化学总复习专题09氧硫及其化合物和环境保护习思用练习含解析

氧、硫及其化合物和环境爱护考点1 硫单质1. [2024黑龙江齐齐哈尔第八中学高三第一次测试]下列化合物能用相应元素的单质干脆化合生成的是( )①CuS ②FeS ③Al2S3④Fe2S3⑤Cu2S ⑥FeCl2⑦H2S ⑧FeCl3A.②③⑤⑦⑧B.①④⑥⑦C.①②③⑦⑧D.②③⑤⑥⑦⑧2. 下列关于硫及其化合物的说法中正确的是( )A.自然界中存在游离态的硫B.二氧化硫的排放会导致光化学烟雾的产生C.二氧化硫能使滴有酚酞的氢氧化钠溶液褪色,体现了其漂白性D.可用pH试纸测浓硫酸的pH3. [2024成都毕业班摸底考试]如图是硫元素在自然界中的循环示意图,下列有关说法不正确的是( )A.硫元素在自然界中既有游离态又有化合态B.过程⑤可在土壤的缺氧区实现C.硫元素的循环过程中只有硫的还原D.若生物体有机硫的成键方式为,则过程④中S未发生氧化还原反应4. [2024郑州高三1月一模,10]在给定条件下,下列物质间转化均能实现的是( )A.S SO3 H2SO4B.粗硅 SiCl4 SiC.NH3 NO HNO3D.Cu CuS H2S考点2 硫的氢化物和重要的氧化物5. [2024北京理综,10,6分]依据SO2通入不同溶液中的试验现象,所得结论不正确的是( )溶液现象结论A 含HCl、BaCl2的FeCl3溶液产生白色沉淀SO2有还原性B H2S溶液产生黄色沉淀SO2有氧化性C 酸性KMnO4溶液紫色溶液褪色SO2有漂白性D Na2SiO3溶液产生胶状沉淀酸性:H2SO3> H2SiO36. [高考组合改编题]下列说法正确的是( )A.[2024四川理综,1C改编]SO2作纸浆的漂白剂没有发生化学改变B.[2015重庆理综,2D]SO2和SO3混合气体通入Ba(NO3)2溶液可得到BaSO3和BaSO4C.[2015安徽理综,9C]H2、SO2、CO2三种气体都可用浓H2SO4干燥D.[2014重庆理综,2A]用KOH溶液鉴别SO3(g)和SO27.下列有关物质用途的说法不符合事实的是( )A.SO2可用于杀菌、消毒B.氧化铝可用于制耐火坩埚C.浓硫酸可用于干燥SO2D.SiO2可用于制太阳能电池8.如图所示是探讨二氧化硫性质的微型试验装置。

二年级三位数进位退位减法练习题

二年级三位数进位退位减法练习题

二年级三位数进位退位减法练习题322-258=401-189= 53-97=07-39=461-484=14-95=312-79=401-354=363-94= 48-172= 38-241=449-131=292-257=11-356=1-59=62-232=274-46= 72-54=85-53=993-296=457-58= 05-286= 57-388= 02-243=406-249=26-229= 05-216=344-245=307-136=28-169=0-289= 72-175=253-58= 07-189=326-182= 00-258=700-292=500-78=400-348=722-248=141-69= 22-158= 73-184=378-255=486-305=90-246= 71-185=806-37=370-81=1-188= 49-337=35-187=454-266=27-148=07-225= 40-396=448-59= 12-28=416-151=2-173=436-77=0-86=7-569=300-182=463-97= 01-336=6-538= 03-265=675-138=11-259= 12-229= 43-435=303-297=62-176= 77-178=35-289=708-223= 10-154=70-383= 00-325=18+237=42+558=31+348=59-764=97-653=57-792=50-688=23 -294=16+196= 180+625= 170+316=31+294= 196-47=24+324= 148+626=6+208=95-798=847-469=0+278= 71-341=8+682= 99+223= 21-488= 44+399= 6+166=2+333= 121+206= 73-725= 79-789= 03-198=219-0=433+443=2+121=9+381=786-51= 24+542= 128+835= 95-703=5+402= 49-652= 76-611= 98-964=6-54= 74+503= 80-165= 35-23=5+573=3-445=+790= 171-86= 42+458=455+310= 47-680= 138+790= 136+688= 58-87= 09-503= 16+381= 10-288= 41+972= 140-138=+943= 47-38= 70+250= 04+444=3+812= 83+308=6-203=390+552=01+836=05-369=7+983=20+269=21+148=2+744=38+ 893=5+258=43-80=26-255=33-624=28+469=4+581=58+239=3 0-520=39+144=232-200= 47-423=7-91= 88-219= 7+521= 172+946= 58+286= 34+390=3-271= 161+384= 57+213= 09-11=4+986= 79-193= 03-860= 52+375=+568=629-400= 19-10= 71-12=7-255=0+195=3+467=51-168= 32+249= 143+614= 177+523=3+193= 00-422= 116+842= 193+339=+667= 187+361=2-569=627-558=8-418=9+166= 06-355= 192+299=5-516= 87-833= 54-159= 16-563=7+451=2+593=5-493= 31-810= 03+407=2-102= 72+577= 13+371=63+455= 135+364= 19+898=14-510=9+496=44+392=08-293=75-771=83-473=167+745=47+599=57-507=66+445=79-466=37+263=72-213=27+144=3+900=880-661= 75+286= 8+668= 83-596= 79-114= 76-351= 79-511=6-171=2+392= 56-107= 73-481=0+436=4-257= 128+612= 4+796=8+372=4-612=8-200=213+292=+967= 54-321= 42-189= 73-799= 22-62= 75-540= 86-46=9-184= 146+654=5+107=5-329= 21-226= 03+575= 18+362= 54-657= 131+784=9-68=73+659= 24-361= 05-528= 45-467=6-200= 43+119= 74-725= 00-252= 70+547= 20+350= 100+735=1+355= 88-303=3+590= 35+229=5+304= 79+226= 35-414=471-188=81-46=04-742=02-110=5+843=81+567=74-484=21-766=73+597=12-472=26-70=34-515=91+958=70-186=80-636=82-42=24+966=69+725=541+936=8+761=4-273=3+952= 78-301= 31+497= 05-625= 162+224=9-352= 107+758= 17-171= 17-684= 88-211=8+981= 11-363=0+961= 136+913= 1+383=641+883= 02+787=6+688= 60+779= 00+761= 59+687= 133-103= 50+731= 117+372=4+961= 33+827=+288=4+856= 7+406= 09+998= 183+593= 28+737=6-361=974-722= 04-146=6-651= 32-175= 79+955= 11-306= 77+800= 07+859=1+605= 13+212=1-705= 55-411= 160+627=7-143= 80+314= 184+378= 33-227= 37-207= 二年级数学一、口算题。

09级遗传学练习题(2)

09级遗传学练习题(2)

09级遗传学练习题(2)遗传学练习题⼀、名词解释:⼈类基因组计划(HGP)由美国科学家于1985年率先提出,于1990年正式启动的⼀项国际合作项⽬。

该计划旨在对构成⼈类基因组的30亿个碱基对进⾏精确测序,发现所有⼈类基因并搞清其在染⾊体上的位置,最终破译⼈类的全部遗传信息。

同源染⾊体染⾊体组型隐性致死基因共显性复等位基因基因互作 Lyon假说 TDF基因从性遗传不完全连锁基因定位启动⼦(Promoter) 回⽂序列 SD序列互补测验(顺反测验)染⾊体畸变平衡致死品系基因突变⽆义突变⼆、填空题:1、离基因编码的起始区最近的元件是(启动⼦)。

对启动⼦识别起作⽤的是RNA聚合酶的(6)亚基。

2、某⼀植物⼆倍体细胞有10条同源染⾊体,在减数分裂前期Ⅰ可观察到(5)个⼆价体,此时共有(20)条染⾊单体,到中期Ⅱ每⼀细胞可观察到(10)条染⾊单体。

3、⼈类的性别决定属于(XY)型,鸡的性别决定属于(ZW)型,蝗⾍的性别决定属于(XO)型。

4、有⼀杂交:CCDD × ccdd,假设两位点是连锁的,⽽且相距20个图距单位。

F2中基因型(ccdd)所占⽐率为(16%)。

5、中,把两个突变点分别位于两条染⾊体上称为(反)式,若有互补,表明两个突变点位于(不同)顺反⼦中;若没有互补,表明它们位于(同⼀)顺反⼦中。

检验两个突变点是否属于⼀个基因即顺反⼦的实验叫(互补实验)。

6、细胞减数分裂过程中,(前期Ⅰ的偶线期)发⽣同源染⾊体联会,(前期Ⅰ的粗线期)染⾊体间发⽣遗传物质交换;(前期Ⅰ的双线期)发⽣交叉端化现象,这⼀过程⼀直进⾏到(中期Ⅰ),后期Ⅰ(同源)染⾊体分开,⽽染⾊单体分离在(后期Ⅱ)。

7、杂种植株AaBbCc⾃交,如果所有的座位都在常染⾊体上,⽆连锁关系,与⾃交亲本表现型相同的后代⽐例是(27/64)。

8、在AaBbCcDd×AaBbCcDd的杂交中,①每⼀亲本能产⽣(16)种配⼦;②后代的基因型种类有(81)种;③后代的表型种类有(16)种(假定4对基因均为完全显性);④后代中表现A_B_C_D_表型的占(81/256);⑤后代中表现aabbccdd表型的占(1/256)。

一元一次方程应用题10大类型例题精讲+学后练习

一元一次方程应用题10大类型例题精讲+学后练习

一元一次方程应用题10大类型例题精讲+学后练习1.配套问题【例题】某车间有26名工人,每人每天可以生产800个螺钉或1000个螺母,1个螺钉需要配2个螺母,为使每天生产的螺钉和螺母刚好配套.生产螺钉和螺母的工人各为多少人时,才能使生产的铁片恰好配套?【解析】设安排x名工人生产螺钉,则(26﹣x)人生产螺母,由一个螺钉配两个螺母可知,螺母的个数是螺钉个数的2倍。

从而得出等量关系列出方程。

【解答】解:设安排x名工人生产螺钉,则(26﹣x)人生产螺母由题意得1000(26﹣x)=2×800x解得x=10,则26﹣x=16答:生产螺钉的工人为10人,生产螺母的工人为16人。

【学后练习】油桶制造厂的某车间主要负责生产制造油桶用的圆形铁片和长方形铁片,该车间有工人42人,每个工人平均每小时可以生产圆形铁片120片或者长方形铁片80片,一个油桶由两个圆形铁片和一个长方形铁片相配套。

生产圆形铁片和长方形铁片的工人各为多少人时,才能使生产的铁片恰好配套?2. 增长率问题【例题】甲、乙班组工人,按计划本月应共生产680个零件,实际甲组超额20%,乙组超额15%完成了本月任务,因此比原计划多生产118个零件。

问本月原计划每组各生产多少个零件?【解析】设本月原计划甲组生产x个零件,那么乙组生产(680-x)个零件;实际甲组超额20%,实际甲组生产了(1+20%)x;乙组超额15%,实际生产了(1+15%)(680-x);本月共生产680个零件,实际比原计划多生产118个零件,也就是实际生产了798个零件。

从而得出等量关系列出方程。

【解答】解:设本月原计划甲组生产x个零件,则乙组生产(680-x)个零件由题意可得:(1+20%)x+(1+15%)(680-x)=798解得x=320则680-x=360答:本月原计划甲组生产320个零件,则乙组生产360个零件。

【学后练习】已知甲、乙两种商品的原单价和为100元,因市场变化,甲商品降价10%,乙商品提价5%,调价后,甲、乙两种商品的单价和比原单价和提高了2%,求甲、乙两种商品的原单价各是多少元?3. 数字问题【例题】一个两位数,十位数与个位上的数之和为11,如果把十位上的数与个位上的数对调得到比原来的数大63,原来的两位数是多少?【解析】数字问题,千位数字×1000、百位数字×100、十位数字×10、个位数字×1相加后才是所求之数,以此类推,切忌位数数字直接相加。

2023-2024学年四年级语文寒假专项提升专题09古诗文与日积月累【含答案】

2023-2024学年四年级语文寒假专项提升专题09古诗文与日积月累【含答案】

复习要点概述:四年级上册在复习什么是古诗文?学习古诗文需要注意的问题?本册需要掌握哪些古诗文?语文园地中日积月累的主要内容是什么?应该怎样学习等知识点的基础上,又重点学习了理解、把握古诗文意境,体会诗人在诗中所表达的思想感情和所蕴涵的哲理题。

知识结构整合:考试命题焦点:从近年来小考题的命题来看,关于“古诗文与日积月累”的检测,试题类型较为灵活,考查重点侧重于积累、理解、赏析和评价。

主要题型有:①有关古诗文、名句的作者、作品、年代等文学常识的填空、判断、选择和连线题;②默写与补写题;③理解诗句或古文句子的字词和句子的意思;④填写古诗文名句题;⑤体会古诗文所蕴涵的哲理题。

这部分设题范围广泛,题型灵活,试题存有一定的难度,尤其是针对古诗文赏析、评价和体会思想感情这方面的试题,难度很大。

在复习时应加强这方面的训练。

(2023深圳市南山区期末四年级期末专项训练)1.根据古诗文填空。

(1)《夏日绝句》的作者是。

“ ,”这两句诗透发出借怀古以讽今的深刻用意。

(2)《题西林壁》的作者是宋代诗人。

这首诗前两句写了诗人从、不同的角度,处在、、、不同位置观看的感觉。

这首诗中“ ,”两句,说明了“当局者迷”这个道理。

学了这首诗,我得到的启发是。

(3)《精卫填海》出自《》,是中国上古神话传说之一。

本文讲述的是的故事,体现了精卫的品格。

(2023聊城百草园小学四年级期末专项训练)2.回忆古诗文,根据语境填空。

(1)我最近才知道我所居住的村子一年前被评为“中国最美乡村”,我真是“不识庐山真面目,”啊!(2)老师指导大家写作时,常引用诗人苏轼《题西林壁》中的诗句“ ,”。

来强调习作要多角度观察,多方面描写,写出自己独特的感受。

(3)深秋的夜晚多么可爱啊!我站在江边,看到露水像珍珠一样晶莹光亮,弯弯的月亮像弓一样,想起了白居易的诗句“ ,”。

(2023广东省清远市四年级期末专项训练)3.根据情境写诗词警句。

(1)十一月一日,早晨下着小雨,小东穿着昨天穿的单衣准备出门,奶奶看见了连忙对他说:“ ”,多穿一件衣服吧。

2009年报关员考试商品归类强化练习(二)-中大网校

2009年报关员考试商品归类强化练习(二)-中大网校

2009年报关员考试商品归类强化练习(二)总分:200分及格:120分考试时间:120分商品归类题。

请先查出商品编码,再将该编码的8位数字相加求和,然后根据求得的和数在答题卡上将相对应的选项拦数字标号涂黑,十位数字涂黑在上一栏0~9的数字框内,个位数涂在下一栏0~9的数字框内;如相加结果为一位数,十位数将0涂黑。

(每题2分,共200分)(1)人造毛皮制手提包(2)猪肝经精细均化制成的供婴幼儿食用的食品,400克/瓶。

(3)一种铁合金,含硅30%、铬12%、碳2%,其余为铁。

(4)洋葱粉(5)烘焙的花生米,250克/袋(6)钢铁制螺丝刀(7)“金狮”牌皮带,牛皮制。

(8)液体肥皂(9)棉短绒(10)如图所示的塑料鞋:(11)硬脂沥青(12)x射线衍射照相机(13)胡椒粉,50克瓶装。

(14)考勤钟(15)大型草坪用的旋转式自动喷水器(16)电动自行车(17)路由器(18)装有揉面器、烘箱等装置的总重3吨的烘面包车。

(19)对矿砂进行焙烧的炉(非电热)(20)鲸鱼油(21)表层为非洲桃花心木薄板制成的胶合板(表层厚度l毫米,其余各厚l.5毫米)(22)稻壳(23)砂纸,规格20厘米×40厘米。

(24)不锈钢热轧平板卷材,厚度1毫米,宽度500毫米。

(25)电热毯(26)真丝纱线(27)电磁离合器(28)鲜的玫瑰插花(29)测试频率200兆赫兹的通用示波器(30)便携式CD播放机(31)一次性的聚乙烯薄膜制鞋套(32)青鱼,洗净后烹煮、盐腌再熏制后装袋(33)超过100年的项链(天然珍珠制)(34)雪茄烟(35)滑雪板靴,外底由塑料材料制成,鞋面由皮革制成。

(36)手雷(37)活的龙虾(38)银制镶嵌钻石的戒指(39)油画原件(40)赤磷(41)输出功率120马力的汽车柴油发动机用活塞(42)干木耳(43)聚氯乙烯制的硬管,长2米,直径2厘米。

(44)塑料制的发梳(45)煤气热水器(46)电子天平,感量1毫克。

小学奥数---简单数列中的规律专项练习30题(有答案)

小学奥数---简单数列中的规律专项练习30题(有答案)

小学奥数---简单数列中的规律专项练习30题(有答案)1.在数列1×2、2×3、3×4、4×5、…、99×100中,要求找到第6个数是多少。

答案:B。

562.给定数列1、3、5、…、9,要求找到第8组的三个数的和是多少。

答案:213.给定数列3、5、7、X、Y、Z,要求填出X、Y、Z应该是多少,同时找到这个数列的规律。

答案:X=9,Y=11,Z=13,规律为每个数加2.4.根据规律填数或者划出适当的图形。

1) 3,20;5,40;7,80;9,…2) 4,6,10,16,26,42,…3) 16,25,36,49,64,…4) □○△→△□○→○△□→□○△5.给定数列100,81,64,49,36,要求填出下面的两个数是多少。

答案:25,166.按规律在括号里填上适当的数。

1) 1、15、3、13、5、11、7、92) 198、297、396、495、5943) 21、4、18、5、15、6、14、77.根据规律填数。

①30,28,26,24,22,20;②1,3,6,10,15;③15,20,25,30,35,40.8.给定数列1,4,9,16,要求找到下面两个数是多少。

答案:25,369.找规律填后面的数。

1,4,9,16,25,36,49,64,81;2,3,5,8,13,21,34,55,89.10.给定数列:1) 1,4,9,16,25,36,49;2)4565456777要求填出缺少的数。

答案:1) 642)7898889911.给定数列xxxxxxxx,要求填出下一个数是多少。

答案:512.按规律填空。

1) 1,5,9,13,17,21,25,292) 2,4,6,10,16,26,42,…3) 1,3,6,10,15,21,28,…1.缺少一组数字,无法判断规律。

2.缺少两个数字,无法判断规律。

3.数列中每一项都是前一项的两倍再加1,所以下一个数是191.14.数列中第n个数组内的三个数分别是n^2.4n。

第09课《猎人海力布》精品配套练习(基础+阅读)-部编版五年级上册

第09课《猎人海力布》精品配套练习(基础+阅读)-部编版五年级上册
8.词语运用
敬爱 敬重
(1)小白蛇说:“( )的猎人,您是我的救命恩人,我要报答您。”
(2)我非常( )那些为社会做出突出贡献的人。
惦念 纪念 留念
(3)我们每到风景优美的地方都要拍照( )。
(4)端午节,民间有吃粽子、赛龙舟的风俗,传说是为了( )屈原。
9.给带点的字选择恰当的解释(选填序号)。
老:①旧,跟“新”相对。②经常、总是③年纪大 ④经历丰富,经验多。
3.“小白蛇叮嘱海力布( )动物说了什么, ( )不要对别人说。”填上关联词语,应选( )。
A.只要……就……B.如果……就……
C.无论……都……D.即使……也……
4.下列句子中,加点词语使用恰当的一项是( )
A.地下流出洪水,把他们住的 村子淹没了。
B.他想到这里,就安静地对大家说:“今天晚上,这里的大山要崩塌,洪水要淹没大地。你们看,鸟都 飞走了。”
(1)从语段中的两个“!”可以体会到______________。朗读海力布的话时应该用____________(a.气短声促 b.气粗声重 c.气足声硬)的语气。(填序号)
(2)这段话通过描写海力布的___________和_____________表现了海力布_________________品质。
19.对于大家不相信海力布、不肯搬走的原因理解有误的一项是( )
A.海力布平时总说谎话。B.他们舍不得离开世代居住的家园。
C.他们想知道真相。D.搬家不容易。
20.根据画“”的句子,想象海力布会怎么向乡亲们解释?
接着,海力布说:“__________________。”
三、拓展提升
(一)阅读理解。
画龙点睛
过了一会儿,云散天晴,人们被吓得目瞪口呆,一句话都说不出来了。再看看墙上,只剩下了没有被点上眼珠的两条金龙,而另外两条被点上眼珠的金龙早已不知去向。

会计珠算练习题

会计珠算练习题

会计珠算练习题二,乘算11810.5703040一四七十二06×32=289984×703=590547×679=319119×8,045=1523,572÷47=765三二五八三,除算3,655÷85=43五6,887÷71=9六2.9626÷0.58= 七,650÷62=71 八24,016÷304= 九5,075÷203=257,892÷70=全国珠算等级五级考试试题一加减算二,乘算一02×61=489220.156×7.04=1.0982四1×105=3255五47×69=6534六0.4809×0.94=0.45204七1×587=1819八54×31=20274二3×832=4409三九1二,002÷69=.91708×462=327三,除算20÷12= 五七09一三1,176÷56=3,940÷38= 十 6.83÷81=1.02,064÷24= 六八27×2,053=554四.3062÷0.47=65,160÷905= 全国珠算等级五级考试试题一加减算二,乘算二三四分钟,小数题一2×359=15070.618×9.07=1.96×802=7699保留两位小603×14=84428605262九44,992÷703=6十58,879÷607=五94×58=22852六0.1507×0.81=0.12206七9×236=1392八58×42=3183九07×731=15131十3×6,097=506051三,除算一580.04÷96= 二3,572÷47= 三85÷19= 四,655÷85= 五,887÷71=六2.9626÷0.58= 七,650÷62= 八24,016÷304=九5,075÷203= 十57,892÷706=全国珠算等级五级考试试题二,乘算一06×32=2899二1×281=17141 三 0.523×4.05=2.1181四五98×94=5621六0.7504×0.76=0.17030七7×679=3191八73×59=1610九02×168=5073十19×8,045=152855三,除算一245.64÷49=5.01 二23÷71=1三,646÷63=4四78÷14=27五九1,092÷28=390,876÷307=6六6.8936÷0.82=十8.414,872÷901= 七7280,750÷85=9八48,576÷506=96浅谈珠算的练习方法响水职中李桦珠算是从事统计、会计工作必不可少的一门应用技术,只有熟练地掌握了这门技术,有一手过硬的操作本领,才能保证计算的准确,提高工作效率。

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定语从句EX1用适当的关系词(引导词)填空(who, whom, which, that, whose, when, where, why)1.Is there ayone around the factory ____ knows how to operate the computer?2.All the apples ___fell down were eaten by the pigs.3.I, ____ your good friend, will try my best to help you.4.Is oxygen the only gas ____ helps fire burn?5.Those ____have plenty of money will help their friend.6.This is the very train ____ I will travel on.7.The day will come ____ the people all over the world will win liberation.8.In the dark street, there wasn’t a single person _____ she could turn for help.9.Why can’t you realize(understand) the part ____ they have played in our life?10.Lincoln, ______life was once hard, were elected President of America.11.____ has been announced , we shall have our final exam next month.12.China is no longer ____ it was twenty years ago.13.Mr. Herpin is the very one of the foreign experts who ____(speak/ speaks) Chinese.14.In the police station I saw the man from _____ room the thief has stolen the TV set.15.---Robert, is this your?---Yes, it’s just the same Walkman ____ I lost on the playground yesterday.16.I have bought the same dress ____ she is wearing.EX2:Translation1.I want to have a pen friend.In my mind____________________________________(她最好是喜欢旅游的)2.The students _____________________(获得免费高等教育的) must go back to hometown for it for 10 years.3.这个想法可以增进友谊,鼓励节约(economy),得到师生的支持4.你正是在需要时给我帮助的人。

5.我们能做的第一件事就是让我们的校园更美丽。

EX3: 巩固练习1.①The man ______________ she married last year was a soldier.②The man ___ she was married was a soldier.2.①The reason ___ she gave up teaching was her serious illness.②The reason _____ he told me is not true.3.①The day ______ she spent with us was never to be forgotten.②The day ______ she played with us was never to be forgotten.4. ① Is this the factory ____ you visited last week?② Is this factory ______ you visited last week?5. ① The house _________ window faces south is for the doctor.② The house ________ faces south is for the doctor.6. ① She brought forward a plan _______ we couldn’t agree.② She brought forward a plan _______ we couldn’t accept.7. ① The invention ________ she spent 2 years will do well to the world.②The invention _________ took her 2 years will do well to the world.8. ① The English subject, _______ I do well , is important in middle schools.②The English subject , ________ I have mastered well , is important in middle school.9. ①Tom, ________ I went to the concert , is a friend of mine.②Tom, ______ bicycle 1 went to the concert,is a friend of mine.10.①The place _______ you visited during your holidays is where I used to be for years②The place ________ you stayed for 3 years is where an ancient city used to be. 11.①She will fly to Washington, ________ is the capital of the U.S.②She will fly to Washington, ________ she can enjoy herself.12.①The story happened on a day ________ the weather was wet and cold.②The story happened on a day ________ was wet and cold.13.①The sun heats the earth, ________ we all know.②The sun heats the earth, ________ makes it possible to grow crops.14.①Tom, ________ we had expected,got the 1st place in the competition(比赛).②Tom, ________ we had expected to help us,didn’t even show his face .EX4: 改错:1. This is the factory where we visited last week.2. This is the watch for which Tom is looking.3. The person to who you spoke is a student of Grade Two.4. The house in that we live is very small.5. The sun gives off light and warmth, that makes it possible for plants to grow.6. I’v e read all the books which I borrowed from the library.7. This is the best film which I have ever seen.8. My father and Mr. Smith talked about things and persons who they remembered in the country.9. Everything which we saw was of great interest.10. His dog, that was now very old, became ill and died.11. The reason which he didn’t go to school is that he was ill.12. Those who wants to go with me put up your hands.13. The boy, his mother died last year, studies very hard.14. I have two sisters, both of them are doctors.15. We’r e going to visit the school where your brother works there.16. He is the only one of the students who have been invited to the English Evening.17. That is the way which they work.18. Those have questions can ask the teachers for advice.19. Who is the man who has white hairs?20. I will never forget the days which we had a good time together at the sea.21. The girl dressed in red who likes dancing and singing.EX5: 填空1.Do you know the fact________ Susan has gone abroad?2.Do you believe the fact________ Susan has told us?3.Those ________ like the film are all here.4.Those ____ grew in the garden are watered every day.5. The internet bar is a place____ students aren’t allowed to enter.6.Students went to the internet bars ________ were far away from the city.7.It was in the house_________ you are living that your grandpa was born.8.You may be good at metalwork or cookery and look for a job _______ you can improve these skills.9.He’s got himself into a dangerous situation ________ he is likely to lose control over the plane.10..I can think of a case __________ students obviously knew a lot of English words and expressions but couldn’t write a good essay.11.There are cases _______ speech has started late in a child who eventually turn out to be of high IQ.12.In the book, Newton is shown as a gifted scientist who stood at the point in history _______ magic ended and science began.13.At the point in our game ________I’d predicted the score to be about 9 to 1 in my favor, it was instead 7 to 9.14.He is ____man who is ready to help others.15.He is ____ man who helped us yesterday.16.The computer we use today is not the machine _______ it was when first invented.17.Einstein’s most famous theory is _______ we call the theory of Relativity.18. Is this book the one _______you like?Key EX1 1.who 2.that 3.who am 4.that 5.who 6.that 7.when 8.to whom9.that/which 10.for whom 11.It 12.that 13.speaks 14.whose 15.that 16.asEX2 1.she is someone who is interested in travelling2.who received high education for free3.The idea, which is intended to promote friendship and encourage economy, is supported by the teachers and students.4.You are the very person who gives me a hand when necessary.5.The first thing that we can do is (to) make our campus more beautiful.。

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