讲解：中学证明题在△ABC中,E,F分别为AB、BC的中点,G、H分别为AC的三等分点,连接EG并延长,交FH的延长线于

x=0带进去,方程成立,解得m=-1或者3,一元二次方程,二次项系数不为0,-1舍去

一 那些年轻人不愿上课
,因为他们的老师讲解很差
.他们向老师提问题,他也
不回答.
Primero:aquellos jovenes que no quieren estudiar,es porque sus profesores explican muy mal,cuando hacen unas preguntas ,tampoco le contestan.
二；那位先生用铅
笔在纸上写了几个字,把它
交给女公务员.她看了看,
把它地给我.
Segundo:el senor escribio unas cuantas letras en el papel con lapiz, y le dejo a una funcionaria ,ella lo miro y me la dejo.
三,星期天我
们没有课,在家休息,但是
我们也学习,读课文并且做
练习.
Tercero: el domingo no tenemos clase,quedamos en casa para descansar,pero tambien estamos estudiando,leer los textos y hacer los ejercicios.
四李明把书名和书号
写在纸上,将它递给图书管
理员.
Cuarto: LiMing escribio en un papel el numero y el titulo del libro ,y le entrego a un bibliotecario.
五,她的一个叔叔是
理发师,五十四岁,住在上
海,这个星期天来看她.
Quinto :un tio de ella es peluquero, cinquenta y cuatro anos,vive en Shanghai,este domingo vino a verla.

希望能帮助到你.

Abstract: This paper raised several common server, through its installation, configuration and use of explanations, so we can better understand the working principle and the various server role in order to work on in practice to better exert their effects. In today's network server is the key to the realization interaction, its status is undisputed. Of course, only better harmonization between the various servers to effectively ensure the normal use of the network. Therefore, a variety of server management is the key, which also includes installation and configuration process of the correct use of operations and continuously in the latter part of the update, find errors and correct errors. As the network continues to develop, I believe the server technology will to a higher level.
Keywords: server configuration management level

1958=2*979=2*11*89
程序化一点的来说,一个数N,你可以从2开始试验它能否被某一质数整除,直至试验到根号N
如上,先是1958从2开始,可以被2整除,于是1958=2*979
然后979,从2开始,2,3,5,7,11,可以被11整除,于是979=11*89
然后89是一百以内质数这个应该就比较熟了……
或者也可以用2,3,5,7,试到7了没有被整除就结束了.

判断句：文言文中也有用判断词“是”（或“非”）来构造判断句的现象,比如：问今是何世,乃不知有汉,无论魏晋.（《桃花源记》） 非我也,兵也.（《寡人之于国也》） 句中“是”“非”,和现代汉语判断词“是”“非”同义.但是,这种用法不大常见.文言文往往用别的词或结构方式来表示判断.（一）用其他判断词表示判断 例如：此则寡人之罪也.（《勾践灭吴》） 翻译：这是我的罪过啊.句中“则”译为“是”,即相当于现代汉语中的判断词.此外还有：“即”“乃”“皆”“本”“诚”“亦”“素”“非”等等,例句：①今天子有急,此乃臣效命之秋也.②此诚危急存亡之秋也.③梁将即楚将项燕.④臣本布衣.⑤且相如素贱人.⑥鱼,我所欲也,熊掌亦我所欲也.（二）采用“……者,……也”的方式构造判断句 例如：廉颇者,赵之良将也.（《廉颇蔺相如列传》） 译为：廉颇,是赵国的优秀的将领.妻之美我者,私我也.译为：妻子认为我美的原因,是私爱我.句中判断词“是”的意思,是由“……者,……也”结构表示出来的.当然,这个结构不是固定不变的,具体言语中,其结构变化十分灵活.比如：1．用“……,……者也”表判断 莲,花之君子者也.（《爱莲说》） 2．用“……者,……”表判断 四人者,庐陵萧君圭君玉,长乐王回深父,余弟安国平父,安上纯父.（《游褒禅山记》） 3．用“……,……也”表判断 城北徐公,齐国之美丽者也.译为：城北徐公是齐国的美丽的人.（注意,本句句末的“者”是“的人”的意思,不是结构助词.） 项脊轩,旧南阁子也.（《项脊轩志》） 4．用“……,……”表判断 刘备,天下枭雄.（《赤壁之战》）

（1）直接法：从变量x的范围出发,推出y=f（x）的取值范围；
（2）配方法：配方法是求“二次函数类”值域的基本方法,形如F（x）=af^（x）+bf（x）+c的函数的值域问题,均可使用配方法
（3）反函数法：利用函数和它的反函数的定义域与值域的互逆关系,通过反函数的定义域,得到原函数的值域.形如y=cx+d/ax+b（a≠0）的函数均可使用反函数法.此外,这种类型的函数值域也可使用“分离常数法”求解.
（4）换元法：运用代数或三角代换,将所给函数化成值域容易确定的另一函数,从而求得原函数的值域.形如y=ax+b±根号cx+d（a、b、c、d均为常数,且a≠0）的函数常用此法求解.举些例子吧!
（1）y=4-根号3+2x-x^
此题就得用配方法:由3+2x-x^≥0,得-1≤x≤3.
∵y=4-根号-1(x-1)^+4,∴当x=1时,ymin=4-2=2.
当x=-1或3时,ymax=4.
∴函数值域为[2,4]
(2)y=2x+根号1-2x
此题用换元法:
令t=根号1-2x(t≥0),则x=1-t^/2
∵y=-t^+t+1=-(t-1/2)^+5/4,
∵当t=1/2即x=3/8时,ymax=5/4,无最小值.
∴函数值域为(-∞,5/4)
(3)y=1-x/2x+5
用分离常数法
∵y=-1/2+7/2/2x+5,
7/2/2x+5≠0,
∴y≠-1/2

to wear
这个动词不定式既表示目的,又表示将来做某事

网上多的是,用迅雷下就行了,也可以去百度视频上或者土豆网,在线看也行,如果你的网速不错的话.
我一开始还是下的,后来就直接在网上看了.

1)B (2)-6/b（3）1/2（4）b（5）-3,1（6）-1 (7)±1 (8)b (9)c (10)（题这样出也行?要超级计算机才行啊）(11)a=10 b=99=(12)若b=1,则A=1+1+1+……+1（2001个）=2001若b=-1,则A=-1+1-1+1……-1+1-1=-1（奇数=-1,偶数=0)
1)a/|a|=1或-1,b/|b|=1或-1,则自由组合有三种可能2,-2或0
2）2x+b=0,3-y=0,可以推出x=-b/2,y=3,则y/x=-6/b
3)由题意可知ab=1,x+y=0,原式=4（x+y）+1/2(ab)=4*0+1/2*1=1/2
4)要原式没意义则,则1-x=0,所以x=1
5)此题的规律是后面的数是前面的-1/3倍
6）由题意a+b=0,c*d=1,原式=(a+b)-cd=0-1=-1
7）有xy

定语从句是由关系代词和关系副词引导的从句,其作用是作定语修饰主句的某个成分,定语从句分为限定性和非限定性从句两种.状语从句分为时间状语从句,结果状语从句,让步状语从句,原因状语从句,条件状语从句以及行为方式状语从句.名词从句包括主语从句,宾语从句,表语从句和同位语从句及there be句型.
一、 限定性定语从句
1. that即可代表事物也可代表人,which代表事物；它们在从句中作主语或宾语,that在从句中作宾语时常可省略关系词,which在从句中作宾语则不能省略.而且,如果which在从句中作“不及物动词＋介词”的介词的宾语,注意介词不要丢掉,而且介词总是放在关系代词which的前边,但有的则放在它原来的位置
2. which作宾语时,根据先行词与定语从句之间的语义关系,先行词与which之间的介词不能丢
3. 代表物时多用which,但在带有下列词的句子中用that而不用which,这些词包括all, anything, much等,这时的that常被省略
4. who和whom引导的从句用来修饰人,分别作从句中的主语和宾语,whom作宾语时,要注意它可以作动词的宾语也可以作介词的宾语
5. where是关系副词,用来表示地点的定语从句
6. when引导定语从句表示时间
〔注〕值得一提的是,表示时间“time"一词的定语从句只用when引导,有时不用任何关系代词,当然也不用that引导
By the time you arrive in London, we will have stayed there for two weeks.
I still remember the first time I met her.
Each time he goes to besiness trip, he brings a lot of living necessities, such as towers, soap, toothbrush etc.
7. whose是关系代词,修饰名词作定语,相当于所修饰成分的前置所有格
8. 当从句的逻辑主语是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing时,常用there is来引导
二、非限定性定语从句：非限定性定语从句的作用是对所修饰的成分作进一步说明,通常和主句间用逗号隔开,将从句拿掉后其他部分仍可成立
1. which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分
2. 在引导限定性定语从句时,that有时相当于in which, at which, for which或at which
Attitudes towards daydreaming are changing in much the same way that(in which) attitudes towards night dreaming have changed. 人们对白日做梦的态度正在改变,这与人们对夜间做梦的看法的变化有非常相似之处.
I like the music for the very reason that(for which) he dislike it. 我出于某种原因喜欢这种音乐,而他恰恰与我相反.
We arrived the day that(on which) they left. 刚好我们到的那天他们走了.
3. 有时as也可用作关系代词
4. 在非限定性定语从句中,不能用that,而用who, whom代表人,用which代表事物.
一.定语从句及相关术语
1.定语从句：修饰一个名词或代词的从句称为定语从句,一般紧跟在它所修饰的先行词后面.
2.关系词：引导定语从句的关联词成为关系词
关系词有关系代词和关系副词.关系代词有that, which, who, whom, whose, as等；关系副词有where, when, why等.
关系词常有3个作用：1,引导定语从句.2,代替先行词.3,在定语从句中担当一个成分.
二.关系代词引导的定语从句
1.who指人,在从句中做主语
(1) The boys who are playing football are from Class One.
(2) Yesterday I helped an old man who lost his way.
2. whom指人,在定语从句中充当宾语,常可省略.
(1) Mr. Liu is the person (whom) you talked about on the bus.
(2) Mr. Ling is just the boy whom I want to see.
注意：关系代词whom在口语和非正式语体中常用who代替,可省略.
(3) The man who/whom you met just now is my friend.
3. which指物,在定语从句中做主语或者宾语,做宾语时可省略
(1) Football is a game which is liked by most boys.
(2) This is the pen (which) he bought yesterday.
4. that指人时,相当于who或者whom；指物时,相当于which.在宾语从句中做主语或者宾语,做宾语时可省略.
(5) The number of the people that/who come to visit the city each year rises one million.
(6) Where is the man that/whom I saw this morning?
5. whose通常指人,也可指物,在定语从句中做定语
(1) He has a friend whose father is a doctor.
(2) I once lived in a house whose roof has fallen in.
whose指物时,常用以下结构来代替
(3) The classroom whose door is broken will soon be repaired.
(4) The classroom the door of which is broken will soon be repaired.
(5) Do you like the book whose cover is yellow?
(6) Do you like the book the color of which is yellow?
三.介词+关系代词引导的定语从句
关系代词在定语从句中做介词宾语时,从句常由介词+关系代词引导
(1) The school (that/which) he once studied in is very famous.
(2) The school in which he once studied is very famous.
(3) Tomorrow I will bring here a magazine (that/which) you asked for.
(4) Tomorrow I will bring here a magazine for which you asked.
(5) We’ll go to hear the famous singer (whom/that/who) we have often talked about.
(6) We’ll go to hear the famous singer about whom we have often talked.
注意：1. 含有介词的动词短语一般不拆开使用,如：look for, look after, take care of等
(1) This is the watch which/that I am looking for. (T)
(2) This is the watch for which I am looking. (F)
2. 若介词放在关系代词前,关系代词指人时用whom,不可用who或者that；指物时用which,不能用that；关系代词是所有格时用whose
(1) The man with whom you talked is my friend. (T)
(2) The man who/that you talked with is my friend. (F)
(3) The plane in which we flew to Canada is very comfortable. (T)
(4) The plane in that we flew in to Canada is very comfortable. (F)
3. “介词+关系代词”前可有some, any, none, both, all, neither, most, each, few等代词或者数词
(1) He loved his parents deeply, both of whom are very kind to him.
(2) In the basket there are quite many apples, some of which have gone bad.
(3) There are forty students in our class in all, most of whom are from big cities.
四．关系副词引导的定语从句
1. when指时间,在定语从句中做时间状语
(1) I still remember the day when I first came to the school.
(2) The time when we got together finally came.
2. where指地点,在定语从句中做地点状语
(1) Shanghai is the city where I was born.
(2) The house where I lived ten years ago has been pulled down.
3. why指原因,在定语从句中做原因状语
(1) Please tell me the reason why you missed the plane.
(2) I don’t know the reason why he looks unhappy today.
注意：关系副词引导的从句可以由“介词+关系代词”引导的从句替换
(1) The reason why/ for which he refused the invitation is not clear,
(2) From the year when/in which he was going to school he began to know what he wanted when he grew up.
(3) Great changes have taken place in the city in which./where I was born.
五．限制性定语从句和非限制性定语从句
限制性定语从句 非限制性定语从句
形式上 不用逗号和主句隔开 用逗号和主句隔开
意义上 是先行词不可缺少的定语,不能删除 是对先行词的补充说明,删除后意思仍完整
译法上 翻译成先行词的定语,“…的…” 通常翻译成主句的并列句
关系词的使用上 A．做宾语时可省略 B.可用that
C．可用who代替whom A．不可省 B.不用that
C.不用who代替whom
限制性定语从句举例：
(1) The teacher told me that Tom was the only person that I could depend on.
(2) China is a country which has a long history.
非限制性定语从句举例：
(1) His mother, who loves him very much, is strict with him.
(2) China, which was founded in 1949, is becoming more and more powerful.
要注意区分以下几个句子的不同
(1) His brother who is now a doctor always encourages him to go to college.
他那当医生的哥哥常鼓励他要考上大学.（他还有其他的哥哥）
(2) His brother, who is now a doctor, always encourages him to go to college.
他的哥哥是当医生的,常鼓励他要考上大学.（他只有一个哥哥）
难点分析
（一）限制性定语从句只能用that的几种情况
1．当先行词是anything, everything, nothing (something 除外), few, all, none, little, some等代词时,或者是由every, any, all, some, no, little, few, much等修饰时
(1) Have you taken down everything that Mr. Li has said?
(2) There seems to be nothing that seems impossible for him in the world.
(3) All that can be done has been done.
(4) There is little that I can do for you.
注意：当先行词指人时,偶尔也可以用who
(4) Any man that/.who has a sense of duty won’t do such a thing.
2. 当先行词被序数词修饰
(1) The first place that they visited in London was the Big Ben.
3. 当先行词被形容词最高级修饰时
(1) This is the best film that I have seen.
4. 当形容词被the very, the only 修饰时
(1) This is the very dictionary that I want to buy,
(2) After the fire in his house, the old car is the only thing that he owned.
当先行词指人时,偶尔也可以用who
(3) Wang Hua is the only person in our school who will attend the meeting/
5. 当先行词前面有who, which等疑问代词时
(1) Who is the man that is standing there?
(2) Which is the T-shirt that fits me most?
6. 当先行词既有人,也有动物或者物体时
(1) Can you remember the scientist and his theory that we have learned?
（二）关系代词as和which引导的定语从句
as和which引导非限制性定语从句,有相同之处也有不同之处.具体情况是：
1．As和which都可以在定语从句中做主语或者宾语,代表前面整个句子.
(1) He married her, as/which was natural.
(2) He was honest, as/which we can see.
2. as 引导非限制性定语从句,可放在主句之前,或者主句之后,甚至可以切割一个主句；which引导的非限制性定语从句只能放在主句之后.另外,as有“正如……,正像……”的意思
(1) As is known to all, China is a developing country.
(2) He is from the south, as we can see from his accent.
(3) John, as you know, is a famous writer.
(4) He has been to Paris more than several times, which I don’t believe.
注意：当主句和从句存在逻辑上的因果关系时,常用which
(5) Tom was always late for school, which made his teacher angry.
3. 当先行次受such, the same修饰时,常用as
(1) I have never heard such a story as he tells.
(2) He is not such a fool as he looks.
(3) This is the same book as I lost last week.
注意：当先行次由the same修饰时,偶尔也用that引导定语从句,但是和由as所引导的定语从句意思不同
(4) She wore the same dress that she wore at Mary’s wedding. 她穿着她在MARY婚礼上穿过的一条裙子.
(5) She wore the same dress as her young sister wore. 她穿着和她妹妹所穿的一样的裙子.
（三）以the way为先行词的定语从句通常由in which, that引导,而且通常可以省略.
(1) The way in which/ that/./ he answered the question was surprising.
(四) but有时也可以做关系词引导定语从句
(1) There are very few but understand his idea. ( but= who don’t )
(五) 区分定语从句和同位语从句
1．定语从句修饰先行词,它和先行词是修饰关系；同位语从句说明先行词的具体内容,是补充说明的关系
(1) The plane that has just taken off is for London. 定语从句
(2) The fact that he has been dead is clear. 同位于从句
2．定语从句由关系代词或者关系副词引导,关系词在句中充当成分,有时可以省略；同位语从句主要由that引导,在句中一般不做成分；句子也可以由when, where, how, why, whether, what等词引导,充当成分
(1) The news he told me is true.
(2) The news that he has just died is true.
(3) The problem that we are facing now is how we can collect so much money. 定语
(4) The problem how we can collect so much money is difficult to solve.
3. 同位语从句和先行词一般可以用be动词发展成一个完整的句子,而定语从句不可以
(1) The idea that we could ask the teacher for advice is wonderful. 同位语
(2) The idea was that we could ask the teacher for advice.
(3) The fact that the earth moves around the earth is known to all.
(4) The fact is that the earth moves around the earth.

因为of后面是填宾语形式的
whom引导定语从句,修饰2000 workers的.
one of us用us应为这里不需要从句结构,并且us是we的宾格,所以用us不用we.

梨450÷（1+5/6+2/3）
=450÷2.5
=180千克
苹果180×5/6=150千克
橘子180×2/3=120千克

学习顾问,完全解读.其他的我就不知道了

1.sometime:过去或未来的一个时间点 可用于一般过去时与将来时.例如：
You can hand in your homework sometime before Friday.
你可以在周五前某个时候交作业.
some time：一段时间 大多数是完成,将来,跟在for后面
sometimes：有时,等于at times 一般用于一般现在时
some times：几次,表示次数 例如:I have been to the Great Wall some times.
2the加不加是看后面的名词有没有指定,如果前面或后面从句出现了名词那加the,没出现就不要加,例句不对,is100 真心没看懂,studies本来就是动词,is也是,不能同时出现,这是基本语法问题了 应该改成 the number of the students studies hard at our school
3学习被动语态一定要了解动词的基本分类.通常情况下,只有及物动词才有可能变为被动语态,但不是任何一个及物动词都可以变被动语态.表示具体动作概念的动词一般可以变被动语态,而那些表示人的思想情感或生活状态的及物动词很少去变被动语态的.
l
ast have wish let take part in break out happen没有被动语态 改为被动语态需要换其他单词
使役动词和感官动词变被动语态要还原to
例：
My mother made me do the dishes yesterday.
===I was made to do the dishes yesterday.
We saw a man enter the room.
=== A man was seen to enter the room.
My mother let me play computer once a week.变被动语态
l was allowed my mother to play computer once a week

我不知道你说的哪个,要是化学,那就是有机物加成时,氢加在氢多的一侧.

曲面积分有两种，一种是被积函数为标量函数，那么无所谓正反。另一种被积函数为矢量函数，那么就要函数点乘曲面的法向量。
来源:
http://zh.wikipedia.org/wiki/%E6%9B%B2%E9%9D%A2%E7%A7%AF%E5%88%86

应该就是in return for吧,表示以什么作为回报,这里不用of

非谓语就是在一个句子中有一个谓语之后通过对另一个谓语的变形变成非谓语,被动就是done 主动就是doing。

perfect是形容词,也可以是及物动词.
perfection是名词.
形容词通常修饰名词.
例如,She is a perfect wife and mother.
及物动词后通常带宾语.
例如,He went to Italy to perfect his singing voice.
名词的用法我不用说了吧.
perfect的确可以当名词,指语法上完成时,完成式
future [ past,present] perfect
将来[过去,现在]完成时

十全十美,完整无缺
十分精确; 无比熟练
完美的人或物,典型,代表
[pl.]才艺,造诣,优点
完成[善,美],完整性,极度
(花果的)盛开,正熟
bring sth.to perfection
使某物十全十美
come to perfection
达到完美地步
reach [achieve,acquire,attain] perfection
臻于完善
strive for perfection in
力求...高度熟练
perfection of rudeness
粗鲁之极
be at perfection
(果子)正熟,(菜)烹调恰好
He imitates people to perfection.
他模仿别人,惟妙惟肖.
It was the very perfection of beauty.
它是美的结晶.
Beauty is the least of her perfections.
美貌是她优点中最微不足道的.

一、一般现在时（The Indefinite Present Tense）.
一般现在时表示经常性的或习惯性的动作、特征或状态.常见的一般现在时主要有以下三种句式：
1.肯定句式.一般现在时肯定句式主要由动词原形表示,第三人称单数的谓语动词后要加词尾-s或-es.动词be根据主语不同的人称有不同的形式,第一人称单数中动词be用am,第一人称复数、第二人称单数和复数以及第三人称复数中动词be用are的形式,第三人称单数中动词be用is,动词have在主语是第三人称单数中变为has,其余情况均用原形have.如：
She is a worker.
They are worker.
He has a bike.
We have a bike.
I am the king of the world.
2.疑问句式.一般现在时变为疑问句时,一般在句首加助动词do或does的方式构成,第三人称单数时用does,其余情况都用do,主要动词一概不变,用原形；在以have或has为主要动词的句子中,可以直接将动词have或has提前放于句首,也可以在句首加动词do或does构成,have或has一律用原形have.如：
Do you work?
Does he work?
Has she a cake?
Does she have a cake?
其简略回答形式用“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, I do.
No, he does not.
Yes, she has
No, she has not.
3.否定句式.一般现在时的否定句式在动词前加do/does not的形式构成.如：
She does not work.
They do not have a cake.
此外,一般现在时的主要动词在第三人称单数时,要在词尾加-s或-es.其规则如下：以ch sh x s 或o结尾的动词加-es,以y结尾的动词要先把y改写成i后,再加-es；其余情况一般直接加-s即可.
二、现在进行时（The PresentContinuous Tense）.
现在进行时一般用在表示现在或现阶段正在进行或发生的动作,或即将发生的动作,多指按计划或安排要进行的动作和表示反复出现的习惯性动作（如always总是、 continuously不断地等词）.现在进行时一般可以从句中找到时间标志词,如now, these days at the moment等词语,就必须用现在进行时态来表示.其构成形式为主语+be+现在分词+其他.现在进行时态的三种句式简要介绍如下：
1.肯定句式.现在进行时的肯定句式一般由“be+现在分词”构成.同样,be在不同的人称形式下,有不同的表现形式.在主语是第一人称单数中动词be用am,第一人称复数、第二人称单数和复数以及第三人称复数中动词be用are的形式,第三人称单数中动词be用is,如：
They are working on the farm now.
I’m leaving for BeiJing tomorrow.
2.否定句式.现在进行时的否定句式一般由“be+not+现在分词”构成.动词be的用法与在肯定句式情况下是相似的.如：
He is not looking.
3.疑问句式.现在进行时的疑问句式一般把动词be放于句首构成：“be+主语+现在分词+其他?”,动词be在不同人称形式下的用法与在肯定句式情况下是相似.如：
Is he always saying that?
回答时可以用“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, she is.
No, she is not.
同样,动词的现在分词的构成也是有规律的,一般情况在词尾直接加-ing来表示；在以不发音的e结尾的词,要先把e去掉,再加上-ing,如write的现在分词是writing；在以重读闭音节结尾只有一个辅音字母时,应先双写此辅音字母,再加-ing,如begin的现在分词是beginning.
三、一般将来时（The Future indefinite tense）.
一般将来时多用于口语中,常表示要去做的事或可能要发生的事.一般将来时由be going to +动词不定式构成.其用法简单列举如下：
1.肯定句式.一般将来时的肯定句式由“be going to +动词不定式”构成.be在不同的人称形式下,其形式也是不同的：主语是第一人称单数用am、第二人称单数用are,第三人称单数用is,其余情况下均用are.如：
We are going to visit guiyang.
2.否定句式.一般将来时的否定句式由“be not going to +动词不定式”构成.be在不同的人称形式下,变化与在肯定句式下相似.如：
We are not going to stay with him.
3.疑问句式.一般将来时的疑问句式把be放于句首：“be+主语+ going to+其他?”构成,be在不同的人称形式下,变化与在肯定句式下相似.如：
Is he going to talk with her teacher?
其回答形式为“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, he is.
No, he is not.
此外,动词不定式是无规则可循的,需要在学习中多积累才能正确牢记和运用.
四、一般过去时（The past Indefinite tense）.
一般过去时表示过去某时发生的动作或情况.一般过去时用动词过去式表示.动词过去式按其构成形式有规则和不规则变化两种情况.规则动词的过去式一般直接在词尾加-ed,即：动词原形+ ed；无规则变化的需要边学边记.其用法简单列举如下：
1.肯定句式.一般过去时的肯定句式由“主语+动词过去式+其他”构成.Be作为主要动词应用时,在主语是第一人称单数和第三人称单数的情况下,用过去式was；其余人称情况下,用过去式were.如：
She worked here .
She was here .
2.否定句式.一般过去时的否定句式由：“主语+动词过去式+ not+其他”构成.be在不同的人称形式下,变化与在肯定句式下相似.如：
I did not work here .
We were not here.
3.疑问句式.一般过去时的疑问句式把动词be放在句首或在句首加助动词did构成.be在不同的人称形式下,变化与在肯定句式下相似.如：
Did you work here?
Was he here?
其简略回答形式用“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, I did .
No, I did not.
五、过去进行时（The past Continuous tense）.
过去进行时态表示的是过去某个时间正在进行或发生的动作.其构成形式为：“主语+was/were+现在分词”构成.一般情况下,过去进行时态有一些提示性词语,如at this time yesterday , at that time,或由when引导的时间状语从句.过去进行时态用法简单列举如下：
1.肯定句式.过去进行时态的肯定句式一般体现为：“主语+was/were+现在分词+其他”构成.其中凡是在主语是单数人称情况下一律用was,复数人称情况下用were.如：
I was working.
We were working.
2. 否定句式.过去进行时态的否定句式构成形式为“主语+was/were+ not+现在分词+其他”构成.was/were的用法与肯定句式的用法相似.如：
I was not working.
We were not working.
3.疑问句式.过去进行时态的疑问句式只需把was/were提前放在句首即可.其构成形式为“was/were+主语+ not+现在分词+其他?”构成.如；
Was she working?
Were they working?
其简略回答形式用“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, she was .
No, she was not.
其中,过去进行时态的现在分词构成规则与现在进行时态的过去分词是相同的.
六、现在完成时（The Present Perfect tense）.
现在完成时表示一个过去发生而对现在情况有影响的动作和从过去某时继续到现在的动作或状态.其构成形式为“主语+have(has)+过去分词+其他”.现在完成时用法简单列举如下：
1. 肯定句式.现在完成时的肯定句式一般表现为“主语+ have(has)+过去分词+其他”.have(has)的用法为,在主语是第三人称单数的情况下,用has；其余情况用have.如：
He has been to Japan before.
We have written it.
2. 否定句式.现在完成时的否定句式由“主语+ have(has)+ not+过去分词+其他”构成.其中have(has)的用法与肯定句式下的用法相似.如：
They have not written it.
He has not written it.
3.疑问句式.现在完成时的疑问句式只需把助动词have(has)提前放在句首即可.句式为“Have(has)+主语+过去分词+其他?”构成.其中have(has)的用法与肯定句式下的用法相似.如：
Has she written it?
Have you written it?
其简略回答形式用“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, she has .
No, she has not.
此外,现在完成时的过去分词与它的过式相同,不规则的动词的过去分词需要在日常学习中边学边记.值得强调的是,现在完成时与过去式是有既区别又有联系的.一般情况下,当有一个表示到现在为止这段时间的状语,用already, yet, just as yet, ever, never等这类副词作状语,或一件已经发生的事,不考虑它是什么时候发生的,而主要考虑对现在的影响时,多用现在完成时.
七、一般过去将来时（The Simple past future tense）.
一般过去将来时往往表示从过去某时看将要发生的动作或存在的状态和过去习惯性的动作,说明在什么情况下往往如此.一般过去将来时句式由should或would+动词原形构成.总体来说,一般过去将来时主要有以下两种用法：
1.在表示过去某时看来将要发生的动作或存在的状态.其构成形式为“should或would+动词原形”.一般情况下should或would的用法是在主语是第一人称的句式下,常用should；其他人称的情况下常用would.如：
My teacher said there would be an English exam tomorrow.
2. 一般过去将来时在表示习惯性的动作时,其句式为“should或would+动词原形+其他”构成.无论在什么人称情况下,都用would而不用should.如：
Every evening he would talk with his neighbour.
八、过去完成时（The past perfect tense）.
过去完成时是一个相对的时态,表示的是过去的过去,只有在和过去某时或某动作相比较时才用得到它.即过去某时前已发生的动作或存在的情况.过去完成时一般由“had+过去分词”构成.过去完成时在英语学习中应用相对较少,一般不常用.其句型略举如下：
My mother had gone to work when I got up.
九、现在完成进行时（The present perfect Continuous tense）.
现在完成进行时一般表示动作从过去某一时间可是一直延续到现在,现在这个动作可能刚刚终止,也可能仍然在进行着.现在完成进行时用法简单列举如下：
1. 肯定句式.现在完成进行时的肯定句式由“主语+have(has) been +现在分词+其他”构成.其中,主语是第三人称单数时用has；其余情况一律用have.如：
She has been working.
We haven been working.
2. 否定句式.现在完成进行时的否定句式由“主语+have(has)+ not +been +现在分词+其他”构成.其中have(has)的用法与肯定句式下的用法相似.如：
She has no been working.
We haven not been working.
3.疑问句式.现在完成进行时的疑问句式只需把助动词have(has)提前放在句首即可.句式为“Have(has)+主语+ been +现在分词+其他?”构成.其中have(has)的用法与肯定句式下的用法相似.如：
Have you been working ?
Has he been working ?
其简略回答形式用“Yes+主语+动词”或“No+主语+动词+not”.如：
Yes, he has .
No, he has not.
此外,有些不能用在现在完成进行时态的动词,如like, love, know, seen, hear等,这类动词只能用在现在完成时的情况下.
十、将来进行时（The future continuous tense）.
将来进行时一般表示某一时刻或某段时间正在进行的动作,或即将或按计划将要发生的动作.将来进行时一般用法简单列举如下：
1. 肯定句式.将来进行时的肯定句式由“主语+shall(will) be +现在分词+其他”构成.其中shall一般常用在主语是第一人称的句子中；will用在第二人称和第三人称的句子中.如：
We shall be doing .
She will be doing.
2. 否定句式.将来进行时的否定句式由“主语+ shall(will)+ not+ be +现在分词+其他”构成.shall(will) 的用法与肯定句式下的用法相似.如：
I shall not be doing.
You will not be doing.
You can take our lives, but you’ll never take.
3.疑问句式.将来进行时的疑问句式只需把shall(will)放在主语前,也可以加上疑问代词构成.其中shall(will)的用法与肯定句式下的用法相似.如：
What will you be doing at eight tomorrw morning?
值得注意的是,在回答将来进行时的疑问句时,必须根据句子的实际问题作出稍微详细的回答.
十一、将来完成时（The future perfect tense）.
将来完成时主要表示将来某个时间会发生的事情.将来完成时一般由“主语+ shall(will)+ have+过去分词+其他”构成.在主语是第三人称时用will；而其余情况用shall.如：
I shall have finished this paper by supper.
They will have arrived home by now.
十二、将来完成进行时（The future perfect continuous tense）.
将来完成进行时表示将来某时前一直进行的动作.将来完成进行时的主要句型由“主语+ shall(will)+ have+ been+现在分词+其他”构成.其中shall(will)的用法是：在主语为第三人称时用will,其余情况用shall.如：
In another month’s time, he will have been studying here for two years.
十三、过去将来时（The past future tense）.
过去将来时包括一般过去将来时、过去将来进行时、过去将来完成时、过去将来完成时和过去将来完成进行时.简要介绍如下：
1. 一般过去将来时（The past future in definite tense）.
一般过去将来时主要表示从过去某时看将来要发生的事情.其句型构成由“should/would+动词原形”构成.在主语是第一人称时用should；其他情况下用would.如：
I thought you would agree with me.
2. 过去将来进行时(The past future Continuous tense).
过去将来进行时主要表示从过去某时看将来某时正在进行的动作或预计要发生的动作.由“should/would+be+动词现在分词”构成.如：
I thought you would be sleeping.
3. 过去将来完成时（The past future perfect tense）.
过去将来完成时主要表示从过去某时看将来某时会业已完成的动作.由“should/would+ have +动词过去分词”构成.如：
I thought she would have told you about it.
4. 过去将来完成进行时(The past future perfect continuous tense).
过去将来完成进行时表示从过去某时看至未来某时以前会一直在进行的动作.由“should/would+ have been +动词现在分词”构成.如：
He told me that by the end of the year he would have been living there for thirty years.
必须强调的是,过去将来时、过去将来完成时和过去将来完成进行时中should/would的用法与在一般过去将来时的用法是相似的,即主语是第一人称时用should；其他人称的情况下用would.

句子的意思是：所说的大部分有关于Smith一家的（情况）同样适用于johnson一家
你选择A说明你知道这里要填谓语动词
A是are B是is 区别就在于主语是单数还是复数
most of what has been said （所说的大部分情况）是主语,about the Smiths关于Smith一家是修饰
主语是个句子,它的谓语就用单数：is

对,是的,not ''''''' at all,表示一点也不,丝毫也不. My mother doesn;t like watching tv at all. l don't like apples at all. 还有一种是not at all 中间没省略的, 意思是不用谢,相当于you are welcome.

1.主句时态是过去时,所以从句的时态也应该是过去时,选B
2.中间是个which引导的定语从句,注意短语的搭配,types of 所以选D
3.句子后部分是修饰telecision programme的定语.这里是过去分词作定语.排除CD
另外根据句子的意思应该选A（还是基于对to和for这两个介词的基本理解,to更表示往,给,对...；而for更侧重于为,替.请理解.）
4.you have been thinking highly of是个定语从句,修饰主语The employee ,句子还缺少谓语,应该选个谓语动词,故选B
希望我的回答有所帮助

同学,
这道题该选A,因为这是一个祈使句.祈使句是以动词原形开头的.B答案的动词加了S,C答案的动词加了ing,只有A答案的look at 才是动词原形形式.因此要选A.
.加油!

第一个讲的是,一行的元素分别乘以本身这一行元素的代数余子式的和,结果等于行列式的值,乘以其它行元素的代数余子式的和,结果等于0.
第一个讲的是,一列的元素分别乘以本身这一列元素的代数余子式的和,结果等于行列式的值,乘以其它列元素的代数余子式的和,结果等于0.

Structure analysis for dynamic software architecture
The open and dynamic Internet environment greatly urges software entities that are distributed on different locations to coordinate with each other to accomplish a computing task.Software architecture is applied to abstract the software entities to be components and the coordination between them to be connectors and then a model is extracted as the architecture on which the design,analysis and verification are based.Currently,the notion of dynamic software architectures that can modify their architecture and enact modifications during the system execution has become one of the most active research areas.In this paper,we focus on the dynamic evolution of system structure other than coordination mechanisms (e.g.communication protocols).It is widely recognized that some restrictions should be imposed on the system evolution to ensure that the system structure may remain one style or transform within a scope.These conditions,to a large extent,make the system execute under control as expected.

小矩形的面积和的极限

此三代极盛之时大备之制也
这是（夏商周）三代极为昌盛时非常完备的制度
而奔走就事者以后为羞
为兴办学校竭力奔走的人让我们这些后来的人感到羞愧

主语从句.that引导的主语从句可以放在句首.比如：that i am interesting in piano is the secret of my success(我对弹钢琴很感兴趣是我成功的秘诀).that作为引导词来引导主语“i am interesting in piano ”

楼上正解.B集合较A复杂,解也不直观,可先解A得出x=1或2.A∩B={2}这个条件可以知道B中应有2且没有1.代入x=2得a=-1或-3；代入x=1,求出a=-1所以a=-1±√3.所以a=-1和-3都是合适的解.
A∪B=A,说明B属于A.由于A={1,2},①B为空集；②B={1}；③B={2}；④B={1,2}都是合适的情况.后三种可以有上题得出a值；第一种即X² +2（a+1）x+（a²－5）=0无解,解出a

解设较短的直角边为x,较长的为（12-5-x）
则由勾股定理得
x²+（12-5-x）²=5²
x²+49-14x+x²=25
2x²-14x+24=0
x²-7x+12=0
（x-3）（x-4）=0
x1=3 x2=4 （舍去,设的是最短的直角边）
则另一条直角边为：12-5-3=4
面积为：3×4÷2=6

每段长3/5米,用小数表示为0.6米,用整数表示为6分米,每段占全长的1/5,也就是1米的3/5.分析：第一个空：总数量除以总份数等于平均每份数,即3除以5=3/5.
第二三个空略.
第四个空：每段占全长,这里全长是5段,相当于是1段是5段的几分之几,这里和铁丝具体的长度无关,就是300米,平均分成5段,每段还是全长的1/5.
第五个空：每段长是3/5米,3/5米表示3米的1/5,也表示1米的3/5.

对于物体,一般看作质点,摩擦力和拉力虽然平行,也认为是共点力,对于杆三力平行力,就不是共点力.

应该是题目的数据有问题!
物体从50m高空落到地面的时间是√10s
第二个小球落地用时是（√10-1）s
带入公式：S=VT+1/2aT^2
解得 初速度为 （39+2√10）/（√10-1）

如果空格在decisions和whether之间,那就选c
as to是关于的意思,基本上等于on,其实用on最顺
make decision on ***
但是没有,只能用as to

两数差乘以它们的平方和与它们的积的和等于两数的立方差.a^3-b^3=(a-b)(a^2+ab+b^2) 证明如下：（a-b）^3=a^3-3(a^2)b+3a*b^2-b^3 所以a^3-b^3=（a-b）^3-[-3(a^2)b+3a*b^2]=（a-b）(a-b)^2+3ab(a-b)=(a-b)(a^2-2ab+b^2+3ab)= (a-b)(a^2+ab+b^2) 类似地,我们有立方和公式及其推广:(1) a^3+b^3=(a+b)(a^2-ab+b^2)

错
πr²÷r=π

我们可以把这段路分成6段
一开始行驶了1/3也就是行驶了2/6后,离终点,终点是3/6,差24km
所以用3/6-2/6=1/6
这1/6的路程是24km
所以甲乙两地的路程是6*24=144km
所以公式为1/2-1/3=1/6
24*6=144km

银行获取贴息=100000×6%=6000元
甲公司实得余额=100000×（1-6%）=94000元

H3PO4 + OH- PO4^3- + H2O
磷酸是三元酸,一份磷酸能消耗三份碱,但磷酸不是强酸,写离子方程式时不可拆开.

按我的叙述自己画图,注意线段的方向.我作图,你证明.行吗?
在单位园中作两条相互垂直的直径AB和CD相交于圆心O.AB从下到上,CD从右到左.从A点和D点分别作切线交于S,AODS是边长为1的正方形.在AS上取AE=AS/4.在EA的延长线上取EF=EO,在AE的延长线上取EF'=EO.在EF的延长线上取FH=FO,在F'F上取F'H'=F'O.作HTQ与AO平行,交OC的延长线于T,使TQ=AH’.以BQ为直径作圆交OT于N和M,使ON等于TM.以OM的中点L作垂线交单位园于P.则CP即为正十七边形的一边.

The walkie-talkies have been used for such a long time so that some of them can not work normally.One walkie-talkie needs two batteries for charging alternately.
注意下单复数：）

she is foreced to be laughed at
i force her to be laughed at

1/（1*2）+1/（2*3）+1/（3*4）+……+1/(2009*2010)=（1-1/2）+（1/2-1/3）+（1/3-1/4）+……+（1/2009-1/2010）（根据变化规律分解）=1-1/2+1/2-1/3+1/3-1/4+……+1/2009-1/2010（去括弧）=1+1/2-1/2+1/3-1/3+1/4-...

说明：这样的题通常出现在填空题或选择题,所以最好的方法是举例.
若乙数为100,可求甲数为100*（1+255)=125
所以甲数：乙数=125：100=5：4