如限定使用以下的物质,盐：钾盐、钠盐、钡盐；酸：盐酸、硝酸、醋酸、硫酸.那么符合：2H++SO32－=SO2↑+H2O这

定轨道:同步卫星是说和地球自转的角速度相同,而且向心力要指向地球的球心,想象地球是怎么自转的呀.就知道应该在赤道的上空.
定高度:f=Mrω2=GMm/r2→r3=GM/ω2,当ω不变时,则r就不能变化,所以要定高度.

没有限定,不用考虑水解.只要指示剂恰好无色且半分钟内不褪色就行了

答：第一题现在降价幅度45%.
第二题五斤鸡蛋的原价是20元,单价4元/斤

解设原计划X小时完成,零件共有Y个
10X－Y=3
11(X-1)=Y
解得：X＝8
Y＝77

应接不暇是忙不过来,目不暇接是看不过来.

当然可以用名词来限定名词.
教育系统应该是后者即.education system 一般在表示一些机构名称,专业术语,领域划分中都很少出现形容词.

当然可以连用,语法是死的,用法是活的：
I hate when people post their every move on their status
所谓不能连用的情况是：
Their every mom is here.(明显歧义句)
总结：their + every能否出现,取决于其后所修饰的名词（当名词为单数概念时,可连用；反之不行.这是因为every有“每一”的意思,强调单独性）

感恩老师
说起“感谢老师”这个词我就想起《每当我走过老师的窗前》这首歌.“静静的深夜群星在闪耀,老师的房间彻夜明亮,每当我轻轻走过您窗前,明亮的灯光照耀我心房,啊每当想起你您,敬爱的好老师,一阵阵暖流心中激荡……” 没有阳光,就没有万物的生长；没有雨露,就没有百花的芳香；没有父母,就没有我们的生命；但如果没有老师的教诲,就没有我们的进步和成长,所以,我要感谢我的老师们.
老师,我感谢您!您就蜡烛默默的燃烧自己,为我们在茫茫学海里指明道路.老师感谢您,您像小草,朴实无华,默默奉献.老师感谢您,您像太阳,照亮每一颗种子.老师感谢您,您像大地,让每一个希望变成丰硕的果实.老师,我感谢您!你就像辛勤的园丁,细心培育着祖国花朵,使这些花朵茁壮成长.老师我感谢您,您像一把金钥匙,把无知的我们领进知识的宝库.老师,我感谢您,您像春雨, 把点点滴滴的知识撒在我们的心里.老师,我感谢您,您像路灯,照我们勇往直前.老师,我感谢您,您像火光温暖人心,细雨般轻柔的语言,滋润我的心灵
老师,我感谢您!感谢您的辛勤,感谢您的无私,感谢您为我们的付出的一切.

按是否有颜色可分成两类

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,通常是引导词和先行词之间用逗号隔开,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.
限定性定语从句&非限定性定语从句 的区别
1 限定性定语从句:
不能省略,如果省略整个句子意思不完整
非限定性定语从句:
可以省略,如果省略整个句子意思仍然完整
2 限定性定语从句:可以用that 引导
非限定性定语从句:不可以用that 引导
3限定性定语从句:引导词有时可以省略
非限定性定语从句:引导词不可以省略
4限定性定语从句:不用逗号把它和句子的其他部分隔开
非限定性定语从句:用逗号把它和句子的其他部分隔开
5限定性定语从句:只能修饰先行词
非限定性定语从句:可以修饰先行词,也可以修饰整个句子或句子的一部分
这两种定语从句在其功能和形式方面都有明显的区别：
限定性定语从句与主句的关系很紧奏,对其先行词起限定、修饰的作用.如果将其去掉,会影响句子意思的完整性；有时甚至于引起费解、误解.例如：
Rainforests are being cleared for valuable timber and other resources to speed up the economic growth of the nationsin which they are located .
为了加速他们各自所在国家的经济发展,热带雨林作为有价值的原木和其他资源正为人们所砍伐.
Ocean currents affect the climates of the lands near which they flow.
洋流影响其流经的附近地区的气候.
They explained the reason to us why they had hated us before.
他们向我们解释为什么他们不喜欢我们的原因.
非限定性定语从句非限定性定语从句在形式上就与主句很松散,它与主句之间有一个逗点","隔开；它对其先行词没有限定、修饰的作用,只起补充、说明的作用.有时也用它来对全句进行补充、说明.即使将其去掉,也不会影响句子意思.由于上述原因,非限定性定语从句在表达意思方面也有别于限定性定语从句.另外,非限定性定语从句在中文译文里,我们往往将其作为一个分句处理,而不把它作定语翻译.例如：Earlier ,the Babylonians had attempted to map the world ,but they presented it in the form of a flattened disc rather than a sphere ,which was the form adopted by Ptolemy .
（此句中,非限定性定语从句是对先行词a sphere进行补充、说明.）
更早之前,巴比伦人曾试图绘制世界地图,但是他们把它绘制成平盘状而不是托勒密所采用的球体状.
The combination of satellites,which transmit information ,computers ,which store information ,and television ,which displays information ,will change every home into an education and entertainment center .
（此句中,三个非限定性定语从句分别对三个先行词：satellites ,computers和television进行补充、说明.如果去掉这三个非限定性定语从句,那么句子可简化为：The combination of satellites ,computers and television will change every home into an education and entertainment center .）卫星能传输信息,计算机能储存信息,电视能显示信息,把这些手段结合起来可以使每个家庭都成为教育娱乐的中心.
The sun heats the earth ,which makes it possible for plants to grow .（此句中,非限定性定语从句是对全句进行补充、说明,将全句表达的意思看成"一件事情）.太阳给予大地热,这就使植物的生长成为可能.
The old man has a son ,who is in the army .（此句中,非限定性定语从句是对先行词son进行补充、说明.但本句所传达的信息是："这位老人只有一个儿子" .如果将此句改写成限定性定语从句："The old man has a son who is in the army .”那位老人有一个在部队工作的儿子.那么,限定性定语从句就要对先行词son进行限定、修饰.这样一来,句子所传达的信息就变成了："这位老人有一个儿子在部队工作",也就是说可能老人还有其他的儿子在干别的工作）那位老人有一个儿子,他在部队工作."

你是韩喻沁吧,答案是30.6%,我是刘闶諓

△F=△p(S-S0）=mg (S-S0)/S0 =Smg/S0-mg
锅体对锅盖的最大作用力增加量为△F′=△F=Smg/S0 -mg
因为S远大于S0,所以△F′=Smg/S0 最后一步 为什么S 大于S0 就等于Smg/S0

举个例子
限制性定语从句只修饰一个成分
比如：She is the girl who had an argument with me last week.这里的定语从句只修饰girl
可以这么理解 怎么样的girl 上周和我吵了一架的那个女孩
非限制性修饰的是一整个句子
比如：He left for US,which makes me very sad.这里从句修饰整个He left for US这件事情
翻译为他去美国这件事让我很伤心
而且非限制性点语从句都有逗号 放在从句前

Recently, every morning and evening, many people gather to dance in our community square, which does help to keep healthy. What's more, it can not only healthy but also cheap.
However, the long-time dancing and the noise pollution caused by the loudspeaker really bring about unbearable inconveniences. We can’t rest or sleep well. As a result, the students are not only late for school but also sleepy in class, and the workers are easily tired out while working.
Here are some suggestions to solve the problem. They are supposed either to shorten the dancing time and reduce the music noise or to make another choice of dancing places. Only in this way can they have fun and let others enjoy life.

答案：C：y=4.5+0.4x

热力学第二定律应该这样说(Kelvin):不可能从单一热源取出热使之完全变成功,而不发生其他变化.从卡诺原理上说η=1-Tc/Th,Tc达不到绝对零度,热不能全部转化为功——出题的人估计就是冲这儿出发的,揣测一下出题者的想法,答对应该没错,不过鄙视之……

限压阀的出气孔开在锅盖上,因此锅盖的面积就等于S-S0
不是S大于S0,是远远大于,相比较于S,S0非常小,比如S=1000,S0=0.1,这时候S除以S0是10000,10000mg-mg=9999mg,约等于10000mg,所以就不减了,是一种近似的算法,不是精确的算法.

A.控制母线电压为1.1倍额定电压时,灯泡电阻与附加电阻限定的电流应不大于跳、合闸线圈额定电流的10%；
B.控制母线电压为额定电压时,灯泡短路情况下,附加电阻限定的电流应不大于跳、合闸线圈额定电流的20%；
D.控制母线电压为1.1倍额定电压时,电阻短路情况下,灯泡限定的电流应不大于跳、合闸线圈额定电流的10%0
　　答案：A, B, D

an限定词
interesting前置修饰语
story名词
in the earth介词短语作 后置定语,修饰treasures

V的平方=2aS 汽车受到的阻力大小不变所以a不变 速度是两倍 所以 距离两倍

1、Apply for a substantial increase in the number
2、No longer need to submit application reasons,can be directly apply for trial products
3、Except local trial
4、Local trial
Limited Beijing,Shanghai,guangzhou,hangzhou and individual areas of user can apply for trial products,this kind of trial products still need to fill in application reasons to apply for goods,and reserves the right to audit businessman,but applicants is less,usually at about 1000,most don't more than 30000

不光X是无效限定符,Y,Z,B,L,H同样都是
在这里,X,Y,Z,B,L,H都被重复定义了
首先是textbox,后面又被定义成Double,当然会出错

a的模大于b的模 则 向量a＞向量b
错,向量是有方向的,不能比较大小.
向量a=向量b 则 向量a平行于向量b
正确.

选择D,A是酸性溶液,HNO3会将Fe2+氧化,B如果是酸性,会和CO32-反应,如果是碱性,会和NH4+反应,C碳酸氢根离子会和H+反应,D正确.

单数形式

37=9+12+5+11(2,4,6,8)20=3+7+3+7
i:2, v:3,c[2]=3,w[2]=9, f[0]=0, old f[3]=4, new f[3]=9
i:4, v:10,c[4]=7,w[4]=12, f[3]=9, old f[10]=19, new f[10]=21
i:6, v:13,c[6]=3,w[6]=5, f[10]=21, old f[13]=25, new f[13]=26
i:8, v:20,c[8]=7,w[8]=11, f[13]=26, old f[20]=36, new f[20]=37

限制性和非限制性定语从句 1） 定语从句有限制性和非限制性两种.限制性定语从句是先行词不可缺少的部分,去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明,去掉了也不会影响主句的意思,它与主句之间通...

名词,你从他的翻译就能得出啊,two代表两个人,当然是名词了.限定词后面也能接形容词,但是不能单独接形容词,those beautiful flowers 后面接的就是形容词,但是最后还是要为名词服务,the 也是最常见的限定词,用法也一样,不能单独接形容词,否则的话,必定会造成句式的不完整.

填 other
因为前面已有限定词your,故不用冠词。

不定代词：something anything someone anyone 等等 副词：用来修饰动词的词 限定词：表示限定的

who代指passengers的 ,passengers 前后的 句子 都是说它的.限定性和非限定性定语从句的区别：1 限定性的没逗号,非限定的有逗号.2 限定性的从句不可省略,非限定的从句可以省略.使用非限定性定语从句的某些情况：1 先...

舐犊情深（或舐犊深情）
我想没有比这个词语更适合当做标题了!
这个词本身就蕴含着老牛对小牛的爱,也寓意家长对孩子的爱.而文中提到的老牛舔小牛眼睛的画面,也和词语中的动词一样,所以,这是一个完美的标题
这个故事很感人,阅读后令人印象深刻

(1+50%)(1-x)=1+20%
1.5(1-x)=1.2
1-x=4/5
x=1/5=20%
则该药品现需降价20%
(1) 10x1.8+(16-10)x1.8(1+50%)=18+6x2.7=18+16.2=34.2(元),需交电费34.2元
(2) (18+a*1.8*1.5)-2(10+a)=6.5
18+2.7a-20-2a=6.5
0.7a=8.5,a=12.14,10+a=22.14(吨)
他们家上个月用约22.14吨

2,400/600=2/3分钟
1,mas=0.5*m*10*10-0.5*m*1000*1000/9
50a=50-500000/9
a=-100000/9+1

a lot of,lots of,plenty of,a great deal of 后面都接名词,可数不可数名词都可以,表示数量很多.many 和 much也表示很多的意思,前者后接可数名词,后者接不可数名词；a few 好a little 表示不多的意思,前者后接可数名词,后者接不可数名词；few 和little 表示很少,几乎没有,含否定意义,同样是前者接可数名词,后者接不可数名词.

1 the 2 the 3 many 4 a 5 the 6 some 7 their 8 the 9 a 10 such
11 their 12 the 13 some 14 a 15 this 16 some 17 a 18 the 19 some

解题思路：车费应分为两部分，一部分是在4千米内；一部分超过4千米的部分，即（29-5）÷1.5=16（千米）；然后把这两部分加起来即可．

（29-5）÷1.5+4，
=16+4，
=20（千米）；
答：小明家到爷爷奶奶家有20千米．

点评：
本题考点： 整数、小数复合应用题．

考点点评： 解答此题需要分情况探讨，明确题目中所给数量属于哪一种情况，进而解答问题．

解题思路：路程问题常用的等量关系是：速度×时间=路程．本题的等量关系为：30×限定时间=两地距离-3；40×（限定时间-[18/60]）=两地距离．

设限定时间是x小时，物资局仓库离水库y千米．
则

30x＝y−3
40(x−
18
60)＝y，
解得

x＝1.5
y＝48．
答：限定时间是1.5小时，物资局仓库离水库有48千米．

点评：
本题考点： 二元一次方程组的应用．

考点点评： 本题考查路程问题，常用的等量关系是；速度×时间=路程，本题需注意应找到实际走的路程和实际用时．

We are expecting to hear from you.
We are expecting a letter from you.
第一句比较地道.

这种问题不知怎么具体说明 只能找些限制性定语从句的例子你自己体会
定语从句（Attributive Clauses）在句中做定语,修饰一个名词或代词,被修饰的名词,词组或代词即先行词.定语从句通常出现在先行词之后,由关系词（关系代词或关系副词）引出.
关系代词有：who, whom, whose, that, which等.
关系副词有：when, where, why等.
关系代词所代替的先行词是人或物的名词或代词,并在句中充当主语、宾语、定语等成分.关系代词在定语从句中作主语时,从句谓语动词的人称和数要和先行词保持一致.
1）who, whom, that
这些词代替的先行词是人的名词或代词,在从句中所起作用如下：
Is he the man who/that wants to see you?
他就是你想见的人吗?（who/that在从句中作主语）
He is the man whom/ that I saw yesterday.
他就是我昨天见的那个人.（whom/that在从句中作宾语）
2) Whose 用来指人或物,(只用作定语, 若指物,它还可以同of which互换）, 例如：
They rushed over to help the man whose car had broken down. 那人车坏了,大家都跑过去帮忙.
Please pass me the book whose (of which) cover is green. 请递给我那本绿皮的书.
3）which, that
它们所代替的先行词是事物的名词或代词,在从句中可作主语、宾语等,例如：
A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣.（which / that在句中作主语）
The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了.(which / that在句中作宾语）
关系副词可代替的先行词是时间、地点或理由的名词,在从句中作状语.
1）when, where, why
关系副词when, where, why的含义相当于"介词+ which"结构,因此常常和"介词+ which"结构交替使用,例如：
There are occasions when (on which) one must yield. 任何人都有不得不屈服的时候.
Beijing is the place where (in which) I was born. 北京是我的出生地.
Is this the reason why (for which) he refused our offer? 这就是他拒绝我们帮助他的理由吗?
2）that代替关系副词
that可以用于表示时间、地点、方式、理由的名词后取代when, where, why和"介词+ which"引导的定语从句,在口语中that常被省略,例如：
His father died the year (that / when / in which) he was born. 他父亲在他出生那年逝世了.
He is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他四十年前居住过的地方.
·判断关系代词与关系副词
方法一： 用关系代词,还是关系副词完全取决于从句中的谓语动词.及物动词后面无宾语,就必须要求用关系代词；而不及物动词则要求用关系副词.例如：
This is the mountain village where I stayed last year.
I'll never forget the days when I worked together with you.
判断改错（注：先显示题,再显示答案,横线；用不同的颜色表示出.）
（错） This is the mountain village where I visited last year.
（错） I will never forget the days when I spent in the countryside.
（对） This is the mountain village (which) I visited last year.
（对） I'll never forget the days (which) I spent in the countryside.
习惯上总把表地点或时间的名词与关系副词 where, when联系在一起.此两题错在关系词的误用上.
方法二： 准确判断先行词在定语从句中的成分(主、谓、宾、定、状),也能正确选择出关系代词/关系副词.
例1. Is this museum ___ you visited a few days age?
A. where B. that C. on which D. the one
例2. Is this the museum ____ the exhibition was held.
A. where B. that C. on which D. the one
答案：例1 D,例2 A
例1变为肯定句： This museum is ___ you visited a few days ago.
例2变为肯定句： This is the museum ___ the exhibition was held.
在句1中,所缺部分为宾语,而where, that, on which都不能起到宾语的作用,只有the one既做了主句的表语,又可做从句的宾语,可以省略关系代词,所以应选D.
而句2中, 主、谓、宾俱全,从句部分为句子的状语表地点,既可用副词where,又因 in the museum词组,可用介词in + which 引导地点状语.而此题中,介词on 用的不对,所以选A.
关系词的选择依据在从句中所做的成分,先行词在从句中做主、定、宾语时,选择关系代词 (who, whom, that, which, whose)； 先行词在从句中做状语时,应选择关系副词 ( where 地点状语,when 时间状语,why 原因状语) .
1) 定语从句有限制性和非限制性两种.限制性定语从句是先行词不可缺少的部分,去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明,去掉了也不会影响主句的意思,它与主句之间通常用逗号分开,例如：
This is the house which we bought last month. 这是我们上个月买的那幢房子.（限制性）
The house, which we bought last month, is very nice.这幢房子很漂亮,是我们上个月买的.（非限制性）
2) 当先行词是专有名词或物主代词和指示代词所修饰时,其后的定语从句通常是非限制性的,例如：
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了,他曾经是我的老师.
My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园.
This novel, which I have read three times, is very touching. 这本小说很动人,我已经读了三遍.
3) 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数,例如：
He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思,这使我心烦.
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽,这就叫做蒸发.
说明：关系代词that和关系副词why不能引导非限制性定语从句.
1）介词后面的关系词不能省略.
2）that前不能有介词.
3） 某些在从句中充当时间,地点或原因状语的"介词+关系词"结构可以同关系副词when 和where 互换.
This is the house in which I lived two years ago.
This is the house where I lived two years ago.
Do you remember the day on which you joined our club?
Do you remember the day when you joined our club?
由as, which 引导的非限定性定语从句,as和which可代整个主句,相当于and this或and that.As一般放在句首,which在句中.
As we know, smoking is harmful to one's health.
The sun heats the earth, which is very important to us.
典型例题
1）Alice received an invitation from her boss, ___came as a surprise.
A. it B. that C. which D. he
答案C. 此为非限定性从句,不能用 that修饰,而用which.,it 和he 都使后句成为句子,两个独立的句子不能单以逗号连接.况且选he句意不通.
2）The weather turned out to be very good, ___ was more than we could expect.
A. what B. which C. that D. it
答案B.which可代替句子,用于非限定性定语从句,而what不可.That 不能用于非限定性定语从句,it不为连词,使由逗号连接的两个句子并在一起在英语语法上行不通.
3）It rained hard yesterday, ____ prevented me from going to the park..
A. that B. which C. as D. it
答案B.
as 和which在引导非限制性定语从句时,这两个关系代词都指主句所表达的整个意思,且在定语从句中都可以作主语和宾语.但不同之处主要有两点：
(1） as 引导的定语从句可置于句首,而which不可.
(2） as 代表前面的整个主句并在从句中作主语时,从句中的谓语必须是系动词；若为行为动词,则从句中的关系代词只能用which..
在本题中,prevent由于是行为动词,所以正确选项应为B.
As 的用法
例1. the same… as；such…as 中的as 是一种固定结构, 和……一样…….
I have got into the same trouble as he (has).
例2. as可引导非限制性从句,常带有'正如'.
As we know, smoking is harmful to one's health.
As is know, smoking is harmful to one's health.
As是关系代词.例1中的as作know的宾语；例2中,它充当从句的主语,谓语动词know要用被动式.
1)Whoever spits in public will be punished here.
(Whoever 可以用 anyone who 代替)
2)The parents will use what they have to send their son to technical school.
(what 可以用all that代替)
1）what = the thing which；whatever = anything
What you want has been sent here.
Whatever you want makes no difference to me.
2) who= the person that whoever= anyone who
（错）Who breaks the law will be punished.
（错）Whoever robbed the bank is not clear.
（对）Whoever breaks the law will be punished.
（对）Who robbed the bank is not clear.
3) that 和 what
当that引导定语从句时 ,通常用作关系代词,而引导名词性从句时,是个不充当任何成分的连接词.宾语从句和表语从句中的that常可省略.What只能引导名词性从 句, 用作连接代词,作从句的具体成分,且不能省略.
I think (that) you will like the stamps.
What we need is more practice.
1）不用that的情况
a) 在引导非限定性定语从句时.
(错) The tree, that is four hundred years old, is very famous here.
b) 介词后不能用.
We depend on the land from which we get our food.
We depend on the land that/which we get our food from.
2) 只能用that作为定语从句的关系代词的情况
a) 在there be 句型中,只用that,不用which.
b) 在不定代词,如：anything, nothing, the one, all, much, few, any, little等作先行词时,只用that,不用which.
c) 先行词有the only, the very修饰时,只用that.
d) 先行词为序数词、数词、形容词最高级时,只用that..
e) 先行词既有人,又有物时.
举例：
All that is needed is a supply of oil.
所需的只是供油问题.
Finally, the thief handed everything that he had stolen to the police.
那贼最终把偷的全部东西交给了警察.

用双重所有格主要是由于被修饰词有排他性的限定词(determiner)，如冠词、某些不定代词、指示代词、疑问代词、数词等。比如我们不能说 an our old acquaintance，而必须说an old acquaintance of ours(我们的一个老相识);不能说many their books，正确的说法是 many book of theirs(他们的许多书)。所以a girl's shcool不能说成a school of girls'，因为girls's是泛指，不具有特定含义，即不具有排他性。限定词可以与名词的所有格一起放在同一个名词前修饰该名词，但不能跟代词的所有格同时放在名词前面一起使用。

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名次性成分,定语从句分为限定性和非限定性从句两种.
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.

whos指的是whose吧?
Whose pen is it?
The book whose cover is red is dramatic.
Which skirt do you like ,the red one or the blue one?
The book of which cover is red is dramatic.
whichever做疑问句 等同于 which
Whichever suggestion you take can not solve the problem.
What are you doing?
I don't know what he is doing.
whatever做疑问句 等同于what
Whatever he did then,he could not prove his innocence.

每执行一次x=x&(x-1),就相当于把x二进制数从右向左第一个非零数变为零.
所以循环的次数也就是x的二进制数中的非零位数.
9999对应的二进制数是10011100001111,有8个1（不为0）所以循环8次,返回8

从句子的表面上看 限定性和非限定性定语从句的区别就在于能不能各自成句.
因此,你这样理解是对的.
但是需要注意的是 一般限定性定语从句和主句的关系比较密切,而非限定性的定语从句与主句之间的关系则没有那么密切,注意对比一下就好了.

给你找了一篇寓言故事.如下：
The lion and the mouse(狮子与老鼠)
When a lion was asleep,a little mouse began running up and down beside him.This soon wakened the lion.He was very angry,and caught the mouse in his paws.
　　"Forgive me,please." cried the little mouse."I may be able to help you someday." The lion was tickled at these words.
　　He thought,"How could this little mouse help me?" However he lifted up his paws and let him go.
　　A few days later,the lion was caught in a trap.
　　The hunters wanted to take him alive to the king,so they tied him to a tree,and went away to look for a wagon.
　　Just then the little mouse passed by,and saw the sad lion.
　　He went up to him,and soon gnawed away the ropes."Was I not right?" asked the little mouse.
狮子与报恩的老鼠
　　狮子睡着了,有只老鼠在他的周围爬上爬下,很快吵醒了狮子,狮子很生气,一把抓住了老鼠.
　　“饶了我吧,”老鼠请求说,“也许有一天我能帮上你的忙呢.”狮子觉得很好笑,他想：“这只小老鼠怎么能帮上我的忙?”但他还是抬起爪子放他走了.
　　不久,狮子被陷阱困住了.猎人们想将活狮子献给国王,就把他捆在一棵大树上,然后去找马车.
　　这时,老鼠路过这里,看到了绝望中的狮子.他走过去,很快啃断了绳索,说：“我虽小,可是我也能帮上你的忙.”
　　寓意:有些朋友也许平时看似微不足道,但却有可能在我们身处困境的时候提供巨大的帮助.
不知道现在初一的英语水平高低呢,如果嫌这篇太简单可以上 如下网站找：
可可英语网、大耳朵英语网