他向我询问温泉(the Hot Spring Hotel)的路.我告诉他沿着路往前走,在第

1,硫酸氢钠和亚硫酸氢钠
H++HSO3-===SO2(气)+H2O
2,硫酸氢钠和偏铝酸钠
当NaHSO4适量时：H++AlO2-+H2O===Al(OH)3(沉淀)
当NaHSO4过量时：4H++AlO2-===Al3++2H2O
3,硫酸氢钠和锌
2H++Zn===H2(气)+Zn2+
4,硫酸氢钠和氯化钡
SO42++Ba2+===BaSO4(沉淀)

Dear Jack,
Thank you for your last letter.You asked me how to keep fit in your letter and I have several good suggestions for you.First and foremost,take exercises every day.Jogging in the morning would be a good choice.Second,eat more healthy food like vegetables and fruits and try to avoid meat and junk food though these things taste well.Third,drink a bottle of milk every day,which is a good method to keep healthy.Four,do not waste your time watching TV.Save your time to have more sleep and you need to sleep for at least eight hours.
Best Regards
（署名）

In English class
Mr. White: Hey, Chen Jie. You don't look well. What's wrong with you? Are you sick?
Chen Jie:Yes, Mr. White. I have caght a cold and now have a fever.
Mr. White: Oh, I am sorry to hear that. You should go to the doctor now, drink some water and lie in bed for days. Then you can come to school when you recover.
Chen Jie: Thank you, Mr. White. I will.

When I answer the inquiry of your staff from Beijing Office.

感叹：感慨
议论：讨论
询问：讯问
精确：准确

what是疑问代词 对主语 宾语 也就是对名词性的句子成分进行提问,意思是什么
how是疑问副词,对状语,也就是对副词性的句子成分进行提问；对形容词性的句子成分进行提问,意思是如何 多么
例如第一组句子,
what do you think of ...你认为……怎么样?这个句子中think of 缺少宾语,所以用what提问
How do you like .你喜欢……吗?这个句子 like 有宾语,句子主谓宾齐全 所以少的是状语,所以用how提问
第二组句子也类似.
What's the weather like today?like是介词 像,翻译为 今天天气什么样?
=How is the weather today?how是对句子的表语进行提问,今天天气如何?

Dear Martin,
How time flies! It is almost 3 months since I entered senior high school. I’m happy to tell you something about my school life.
My school is fifty kilometers away from my hometown. Not living with my parents, I have learned how to live on my own. And I’ve made some new friends, from whom I’ve learned a lot. I have made great progress in my English and math. Besides, in my spare time, I often take part in different kinds of after-school activities. For example, every week I go to the English Corner where I communicate with others in English. 
What about your school life? Would you like to share it with me?
Best wishes,
Yours,
Li Hua

1.原子核不一定都是由质子和中子构成的.如氢的同位素(11H)中只有一个质子.
　　2.酸性氧化物不一定都是非金属氧化物.如Mn2O7是HMnO4的酸酐,是金属氧化物.
　　3.非金属氧化物不一定都是酸性氧化物.如CO、NO等都不能与碱反应,是不成盐氧化物.
　　4.金属氧化物不一定都是碱性氧化物.如Mn2O7是酸性氧化物,Al2O3是两性氧化物.
　　5.电离出的阳离子都是氢离子的不一定是酸.如苯酚电离出的阳离子都是氢离子,属酚类,不属于酸.
　　6.由同种元素组成的物质不一定是单质.如金刚石与石墨均由碳元素组成,二者混合所得的物质是混合物；由同种元素组成的纯净物是单质.
　　7.晶体中含有阳离子不一定含有阴离子.如金属晶体中含有金属阳离子和自由电子,而无阴离子.
　　8.有单质参加或生成的化学反应不一定是氧化还原反应.如金刚石→石墨,同素异形体间的转化因反应前后均为单质,元素的化合价没有变化,是非氧化还原反应.
　　9.离子化合物中不一定含有金属离子.如NH4Cl属于离子化合物,其中不含金属离子.
　　10.与水反应生成酸的氧化物不一定是酸酐,与水反应生成碱的氧化物不一定是碱性氧化物.如NO2能与水反应生成酸—硝酸,但不是硝酸的酸酐,硝酸的酸酐是N2O5,Na2O2能与水反应生成碱—NaOH,但它不属于碱性氧化物,是过氧化物.
　　11.pH=7的溶液不一定是中性溶液.只有在常温时水的离子积是1×10-14,此时pH=7的溶液才是中性.
　　12.用pH试纸测溶液的pH时,试纸用蒸馏水湿润,测得溶液的pH不一定有误差.
　　13.分子晶体中不一定含有共价键.如稀有气体在固态时均为分子晶体,不含共价键.
　　14.能使品红溶液褪色的气体不一定是SO2,如Cl2、O3均能使品红溶液褪色.
　　15.金属阳离子被还原不一定得到金属单质.如Fe3+可被还原为Fe2+.
　　16.某元素由化合态变为游离态时,该元素不一定被还原.如2H2O=2H2↑+O2↑,氢元素被还原而氧元素被氧化.
　　17.强氧化物与强还原剂不一定能发生氧化还原反应.如浓硫酸是常见的强氧化剂,氢气是常见的还原剂,但可用浓硫酸干燥氢气,因二者不发生反应.
　　18.放热反应在常温下不一定很容易发生,吸热反应在常温下不一定不能发生.如碳与氧气的反应为放热反应,但须点燃；Ba(OH)2?8H2O与NH4Cl反应为吸热反应,但在常温下很容易发生.
　　19.含金属元素的离子不一定都是阳离子.如AlO2-.
　　20.最外层电子数大于4的元素不一定是非金属元素.如周期表中ⅣA、ⅤA、ⅥA中的金属元素最外层电子数均多于4个.
　　21.不能在强酸性溶液中大量存在的离子,不一定能在强碱性溶液中大量存在.如HCO3-、HS-等离子既不能在强酸性溶液中大量存在,也不能在强碱性溶液中大量存在.
　　22.组成和结构相似的物质,相对分子质量越大,熔沸点不一定越高.一般情况下该结论是正确的,但因H2O、HF、NH3等分子间能形成氢键,熔沸点均比同主族元素的氢化物高.
　　23.只由非金属元素组成的晶体不一定属于分子晶体.如NH4Cl属于离子晶体.
　　24.只含有极性键的分子不一定是极性分子.如CCl4、CO2等都是含有极性键的非极性分子.
　　25.铁与强氧化性酸反应不一定生成三价铁的化合物.铁与浓硫酸、硝酸等反应,若铁过量则生成亚铁离子.
　　26.具有金属光泽并能导电的单质不一定是金属.如石墨、硅都具有金属光泽,它们属于非金属单质.
　　27.失去电子难的原子获得电子的能力不一定强.如稀有气体原子既不易失去电子也不易得到电子.
　　28.浓溶液不一定是饱和溶液,饱和溶液不一定是浓溶液.如KNO3的浓溶液不一定是饱和溶液,因KNO3的溶解度较大；Ca(OH)2的饱和溶液浓度很小,因Ca(OH)2微溶于水.
　　29.强电解溶液的导电能力不一定强.导电性的强弱与溶液中自由离子的浓度大小有关,如果某强电解质溶液的浓度很小,那么它的导电性可以很弱,而某弱电解质虽然电离程度小,但如果离子浓度大时,该溶液的导电能力也可以较强.
　　30.弱电解质被稀释时,离子浓度不一定减小.如冰醋酸在稀释时,H+、CH3COO-浓度先逐渐增大而后减小.
　　31.平衡向正反应方向移动,反应物的转化率不一定增大.
　　32.1mol某气体的体积是22.4L,该气体所处的状态不一定是标准状态.

责问:主要是问某种结果导致的错误来承担责任目的问的!
质问:是主要以怀疑的心态去问找原因
询问:很和蔼的,请求对方答案的

-Hi,Mary.
-HI,Gina.What's up?
-I've got this watch in our classroom.Is it yours?
-No,I do not have a watch.
-Then do you know whose' it is?
-Let me see.Sorry,I don't know.But you can ask someone else to see if anyone knows it.
-OK.Thanks anyway.

The new team is coming.What should we prepare for it?My suggestions are as follow.First,we should buy some pens and notebooks,Second,if you live in school,you should buy some shampoo and shower water and so on.Finally,you should buy a new schoolbag and a pair of new shoes.Wish you have a new begining!

Dear:Zhang Hua
Is the sun warm？The summer holiday is coming,and what is your plan about it?Here I'll tell you mine.You know,my grandmother lives in the country,but I have never seen her since...

John：Hello,Tom!Do you have football?
Tom：Yes,I do.What do you want to do?
I：We want to play football.
John：Can you lend us?
Tom：Yes,I can.

In this summer holiday,I'd like to visit Beijing.You know,the Olympic Games will be held in Beijing soon.I'm really interested in sports such as badminton,running and swimming.Beijing is also famous for its tourist attractions,so I'll visit the Great Wall as well.What about your summer vacation?I hope I'll receive your reply soon.

Dear Mr.XXX,
1 Could you please make adivice on XXX?
2 How do you think about XXX?
3 Can I have your opinion about XXX?
Hope to hear from you soon.Thank you.
I look forward to hearing from you soon.I really appreciate it.
Sincerely,
XXX

我把书上的（疑点）画出来,请教老师.
在座的人面面相觑,大家带着询问和（怀疑）的目光看着他.

先声明一下 自己翻译的哦
Did you inquire the shop assistant of Li Hong supermarket about the price of food last week?
Talking in English with classmates improves my speaking skills.
Life is full of challenge,which we needs to think over one by one.
Don't ever laugh at those who are in trouble,or they will feel like being under more pressure.

what is your vocation?
what business are you in?
what job do you have?
what occupation are you carring on?

How are you?

因为DE平行AB
角EDA=角BAD
因为AD为△ABC的角平分线
则角BAD=角CAD
则角EDA=角CAD
则AE=DE
因为AE:EC=3:2
则DE：EC=3：2
因为DE平行AB
CE：AC=DE：AB
CE*AB=AC*DE
AB:AC=DE:CE=3:2

其实引力是不存在的.或者说引力只是这种现象的一种解释而已.它不同于其他力.
“引力”其实是时空扭曲的表现,举一个二维的例子：一张绷直的橡皮筋网
1.放上两个质量不一,体积相同的球,网扭曲了
2.在1的基础上,让一个球在橡皮筋网上作匀速直线运动,直线与（同一个）球的位置距离越近,轨迹弯区越大
3.在2的基础上,让一个球在橡皮筋网上作匀速直线运动接近两个质量不等的球,直线与两个球的距离相同,经过质量大的球,轨迹弯区大
2跟3说明的现象与引力相似,而且也有质量越大、距离越小,引力越大
物体由于惯性沿直线运动,但在扭曲的空间运动,表现出来就是受到引力影响
事实上,引力扭曲的是四维时空.
还有一个例子：光经过大质量天体时会扭曲,但引力不能作用于光,所以解释就是光沿直线传播,在扭曲的时空中运动,就会扭曲.但光还是沿直线传播

ask sb to do sth

《感 动》
翻书的时候,一片银杏叶悄然滑落.
我弯腰,拾起,惊觉这是初中毕业时同桌送给我的,背面上写着“珍重,朋友!”不记得当时是否有种想哭的冲动,只是现在,枯黄的叶片上早已是滴滴泪痕.想起,这世上还有一种心情叫感动.
很长一段时间,我似乎已经忘了感动的滋味,是我心已冷漠,还是我的心被一些无关紧要的东西充斥得没有了空间?
曾有朋友写给我这样一句话：“我们之所以会擦肩而过,不是因为无缘,而是我们的生活中少了两个字——感动.”的确,我们的心因此不再敏感,我们不再用心收藏起身边的一丝一毫感动,只有当我们错过它,再回首时,才发现原来我们真的失去了很多.
总有人抱怨这世上可感动的事情越来越少.可是,只要我们静下心来想一想,你就会发现,其实感动无时不在,无处不在.
读书累了,父母为我们削个苹果,是感动；口渴了,朋友帮你打回一杯水,是感动；沮丧时,得到一句宽慰的话,是感动；高兴时,有朋友与你一起分享快乐,是感动；平凡的日子,收到一份小小的祝福,哪怕只是一片花瓣,一片树叶,也是感动……
人啊,每天被多少平凡的事情感动着!或许,有时正是由于它们的平凡才让我们视而不见.有这样一句话：“人之所以会感动,是因为他生活在爱之中.”红尘有爱,人间有情,我们又有什么理由要让庸碌蒙住我们的眼睛而无法感受感动的滋味呢?
感动是什么?一千个人有一千种答案.但,无论是谁,都无法对一个毫无感情的人说出感动究竟是什么.因为感动不是用嘴说出来的,而是用心品出来的.
感动,如沁人心脾的甘泉.畅饮甘泉,我们的内心变得澄澈而又明亮.
感动,如熏人欲醉的海风.感受海风,我们的内心变得纯净而又宽敞.
感动,如令人心折的白雪.领略白雪,我们的内心变得安静而又平和.
这个世上已无感动的足迹的时候,那它也就随之成了一个冰封的天地.冷酷,亦无情.
朋友,请把心从泥淖中拔出来吧!请腾出一点小小的空间来承载这足以让我们回味一生的感动吧!
《感动》
心中有个玻璃杯,里面存放着大的、小的；红的、绿的东西.那便是我酸甜苦辣的记录芯片,从中随意取出一小片,插入我记忆的波流中------
幼儿时的我,十分贪玩.学校附近有一条小河,那水特别得清,特别得绿.一到了夏天,河里的鱼啊,虾啊就特别多.尤其是那大龙虾,或微微地浮在水面上,或隐隐地藏在水草中.那大龙虾还非常容易上钩,一上就是两只,三只.看着小伙伴们一脸的神气和喜悦,我也心痒痒了,加入到了这钓虾的队伍.由于我太小,一不小心踩了一个空,掉在了河里.我在水里扑腾着,叫喊着------正巧一位老师路过,他连忙跑下河滩,顾不得脱衣,就冲进了水中,把我拖上了岸.不知是由于落水受了惊,还是年幼无知,我望着浑身湿透的老师,我竟然没有感动------
小学时的我,还是那么地贪玩.白天的不知疲倦,晚上就睡得很沉很沉,早上常常起不来.为了不迟到,我也因此常常在匆忙中忘了带饭盒.一到中午,我的肚子自然就唱起了令人难受的“空城计”,而同学们那津津有味的模样更使我几乎馋涎欲滴.每到此时,班主任老师总会拿出她盒中的一半饭,让我共同分享.奇怪的是,老师总是吃得很少很少,但她总是说自己吃饱了.我也不知道这是为什么.望着老师那母亲般的微笑,我仍然没有感动------
中学时的我,面临着课程的增加,学习负担的加重,没办法只好跟贪玩“拜拜”了.我每天都埋头于书海之中,沉浸于题海之内.老师们也抓的很紧,往往一个前腿进,一个后腿出.我生性好强,为了使自己的成绩不过于十分难堪,我可真算是学而不厌了,问而不倦了.一有空,我就请教老师.有时甚至连老师吃饭时也要逮.老师往往马上放下饭碗,一边檫着额头的汗水,一边耐心地给我解答.或许是学习压力过大,或许是忙于挤时间,面对老师略带倦色的脸,我依然没有感动------
即将参加中考的我,为了挤上重高那座独木桥,学习是更加努力了,简直是废寝忘食.有一次,我竟在英语课上睡着了.令人意外的是老师居然正在我身边,更令人惊奇的是她没有叫醒我.下课后,她只是轻轻地说了一声：“上课睡觉会着凉的,知道吗?”望着微风中拂起的那几缕刘海,我的眼中------
记忆转轮停止转动,我的思绪被拉回现实,脸上有一丝凉凉的咸咸的涩涩的感觉,这是感动?!这就是感动.
其实,生命的快乐,不就在于有人分享吗?
记得泰戈尔的诗集中,有首精美的短诗：如果我占有了天空和满天繁星,如果我占有了世界和无量的财富,我仍有更多的要求.但是我有了她,即使在这个世界上只拥有小小的一隅,我也会心满意足.
泰戈尔用他充满哲理的话,道出了分享带来的快乐.如果无人分享,就算拥有全世界,仍不会满足.而当有人分享时,就算分享的只是一杯香茗,那杯香茗,也会成为一份小小的幸福与快乐.
记得这样一句话：把你的痛苦让朋友分担,痛苦就会减掉一半；把你的快乐和朋友分享.快乐就会变成两份.
但愿,我们每个人都学会分享.因为有了分享,生活中会有更多快乐.
让我们分享成功的喜悦,飞扬的心情,分享一豆烛光的温馨,一段音乐的浪漫,一朵花的美丽,分享生命中的每一次感动……

how about this red jacket?

Where is/are ...
Where is the boy?
Where are the teachers?
Where is your book?
Where are his pens?

解题思路：由题意知，甲、乙不是第一名且乙不是最后一名．乙的限制最多，故先排乙，有3种情况；再排甲，也有3种情况；余下的问题是三个元素在三个位置全排列，根据分步计数原理得到结果．

由题意，甲、乙都不都不是第一名且乙不是最后一名．
乙的限制最多，故先排乙，有3种情况，即第二、三、四名；
再排甲，除乙的名次外有2种情况，故甲也有3种情况；
余下3人有A₃³种排法．
故共有3•3•A₃³=54种不同的情况．

点评：
本题考点： 排列、组合及简单计数问题．

考点点评： 排列、排列数公式及解排列的应用题，在中学代数中较为独特，它研究的对象以及研究问题的方法都和前面掌握的知识不同，内容抽象，解题方法比较灵活，历届高考主要考查排列的应用题．

Dear Peter ,
I’m glad to receive you letter asking for my advice on how to learn Chinese well . Here are a few suggestions .
First , it is important to take a Chinese course , as you’ll be able to learn from the teacher and practice with your classmates . Then it also helps to watch TV and read books , newspapers and magazines in Chinese .
Secondly , it should be a good idea to learn and sing Chinese songs , because by doing so , you’ll learn and remember Chinese more easily . You can also make more Chinese friends . They will help you learn Chinese .
Try and write to me in Chinese next time .
Best wishes .
Yours
Li Hua


1.段落和要点：
文章共4个要点，可分两部分：要点1、2为第一段；要点3、4为第二段。
2.时态：一般现在时
人称：第二人称
3.短语和句型：
take a Chinese course参加中文学习班
it is important to do sth……是重要的
make friends with和……交朋友

Hello, we will arrange the shipment between 15th Aug, to 20th Aug. and notice you after ordering the ship, we have inquired the insurance and freight charge and will notice you as soon as we get the response. Thanks!

Dear Susan: How are you going? Miss you so much! Ok, let me tell you something about the plan of my holiday. I always wanna have a travel in Paris with my parents, now the dream comes true! I i...

The coffee powder is used up,my colleague has gone to fetch it,please wait a moment.

1Pa.s=1000mPa.s=10P=1000cP
故1mPa.s=1cP
但是不同的检测仪器检测出的粘度是有比较大的差距的,所以质量指标里还要写明检测仪器及方法.

i go to school at 8am. then finish school at 12o,clock. i have four classes every morning.in addition,i have anather two lessons between half past two and four in the afternoon.after class,i also have mang activities,such as playing football,playing the guita ,do some reading and so on .my favourite subject are english and music.because i think they are intresting and they can amuse me during the busy study. on the other hand ,maths is very difficulty to learn.as a result,i have no intrest in it.

与人相见说“您好” 问人姓氏说“贵姓” 问人住址说“府上”
仰慕已久说“久仰” 长期未见说“久违” 求人帮忙说“劳驾”
向人询问说“请问” 请人协助说“费心” 请人解答说“请教”
求人办事说“拜托” 麻烦别人说“打扰” 求人方便说“借光”
请改文章说“斧正” 接受好意说“领情” 求人指点说“赐教”
得人帮助说“谢谢” 祝人健康说“保重” 向人祝贺说“恭喜”
老人年龄说“高寿” 身体不适说“欠安” 看望别人说“拜访”
请人接受说“笑纳” 送人照片说“惠存” 欢迎购买说“惠顾”
希望照顾说“关照” 赞人见解说“高见” 归还物品说“奉还”
请人赴约说“赏光” 对方来信说“惠书” 自己住家说“寒舍”
需要考虑说“斟酌” 无法满足说“抱歉” 请人谅解说“包涵”
言行不妥“对不起” 慰问他人说“辛苦” 迎接客人说“欢迎”
宾客来到说“光临” 等候别人说“恭候” 没能迎接说“失迎”
客人入座说“请坐” 陪伴朋友说“奉陪” 临分别时说“再见”
中途先走说“失陪” 请人勿送说“留步” 送人远行说“平安”

you can ask Mr/Ms Wu for further details

1 water-saving proud -- to turn off the tap,don't let the water and air flow
China is the world's 12 deficient water state of freshwater resources,less than the world average per capita water 1 / 4.More than 600 national city half water,one of the 108 city of severe water shortage.Surface water resources scarce due to the excessive exploitation of ground water.60 years ago,Beijing wells in the ground about 5 meters below the water will be able to play,now Beijing 40000 are about 49 meters deep,groundwater resource is close already dried up
The" throwaway" plastic bags not only caused a great waste of resources,but also makes the garbage garbage quantity leap.China's annual volume of plastic waste about 1000000 tons,Beijing city if the average per person per day consumption in a plastic bag,each bag weighs 4 grams,4.4 grams each day will throw away the polyethylene film,only raw materials will throw nearly 40000 yuan.Shopping bags to the repeated use of
Protect the earth is to protect ourselves,work together to protect their homes,to create a better life!

怎么好像每次都是李华.准爸爸妈妈可千万别给宝宝起这个名,太惨了.
Dear Mike,
It's so nice to hear from you again.
Yes, the summer holidays are coming and I am more than excited. I've already got plenty of plans on hand.
I will learn to drive and hopefully get my driver's license in one go. I will attend English training courses. I will also go to visit places of interest in Beijing.
Isn't that wonderful? Have you got your plans as well? Share with me and I am very eager to hear from you soon.
Yours Sincerely,
Li Hua

ò ji

what do you see cat?这句话本身就是病句.
what 一般是名词性提问,意思是“什么”一般指事情,或者事物.
比如：What are you doing now?你现在做什么?
What do you want to do?你想做什么?
What is his name?他的名字叫什么?
What is wrong with you 你咋啦?（你有什么不对劲的吗?）
went 是go的过去式,估计你问的是when （什么时候）
when一般问时间,比如when did you finish your homework?你什么时候写完作业的?
where一般问的是地点,意思是什么地方,哪里
比如：Where do you come from?你来自哪里?（你哪里人啊?）
Where am 我在哪儿?
如果把你上面那句话改为：Where did you see the cat?你在哪儿看到了那只猫?
这样就对了.用What的话,可以问：What did you see?A cat.你看到啥了?一只猫.
用when的话,可以是：When did you see the cat?你什么时候看到那只猫了?

It is not polite to ask other's private questions like age and family information

设五羊初级中学中有x名学生，则
数学爱好者协会中初一学生为
1
40 ×
1
3 x=
1
120 x，初二学生为
1
16 ×
2
7 x=
1
56 x，初三学生为
1
9 ×
1
5 x=
1
45 x，
∵120，56，45的最小公倍数是2520，
∴五羊初级中学中有2520名学生，
∴数学爱好者协会总人数为（
1
120 x+
1
56 x+
1
45 x）÷（1-
1
3 ）=183名．
故数学爱好者协会总人数为183．
故答案为：183．

说:
一字词语：讲 说 喊 叫 呼 吟 读 问 答 训 斥 责 骂 吼 劝 告 评议 话 赞 论 述 夸 辩 叙 颂 曰
二字词语：说话 谈话 讲话 叙述 陈述 复述 申述 说明 声明 讲明 谈论 辩论 议论 讨论 商谈 哈谈 商量 畅谈商讨 话语 呓语 梦话 怪话 黑话 谣言 谰言 恶言 狂言
流言 巧言 忠言 疾言 傻话 胡话 俗话 废话 发言 婉言危言 谎言 直言 预言 诺言 诤言 说理 说服 略说 评说怒斥 驳斥 批驳 辱骂 诅咒
听：
洗耳恭听,侧耳倾听,听而不闻 充而不闻
想：
深思熟虑 胡思乱想 挖空心思 想方设法 冥思苦想 左思右想 若有所思

adjugate, augmented matrix, basic solution, Cayley Hamilton theorem, characteristic equation, characteristic polynomial, column rank, Cramer's rule, determinant, direct sum, eigenspace, eigenvalue, eigenvector, elementary matrices, Fredholm alternative, Gauss Seidel method, Gramm Schmidt process, Hermitian, Hessian matrix, Hilbert space, inner product, Jacobi method, Jordan block, Kroneker delta, Laplace expansion, linear transformation, linearly independent, matrix(inverse, left inverse, lower triangular, non defective, normal, right inverse, self adjoint, symmetric, upper triangular), rank, row operations, scalar product, similar matrices, similarity transformation, skew symmetric, symmetric, tensor product, vector space, Wronskian
你找本线性代数的英文书,后面的索引有的是这些名词.

考察 考查 考核
询问 询查 查问
全部 所有 完全
惊恐 惶恐,恐惧

相对来说,有机化学比无机化学难点,不过只要多用心去学,其实挺好学的,对于理综来说,化学应该属于简单的.

最低费用是110元,最高是138元.
46/6=7.4
14*7+2*6=110元
46/2=23
23*6=138元

72=2*2*2*3*3
显然要使三个女儿年龄不同,有两种情况：
1、小女儿2岁,则二女儿4岁,大女儿9岁,门牌号15；
2、小女儿3岁,则二女儿4岁,大女儿6岁,门牌号13.

Dear Tom,
I'm so happy to receive your letter.I'd like to tell you something about my dream job.I think I will be a teacher in the future.I have been learning English for several years and the importance of English has been acknowledged by nearly everyone.I'm learning very hard so that I can teach little children in primary schools.I really wish my dream can come true.
Also,in order to fulfill my dream,I have a lot to do.Would you give me some advice?Hope to hear from you soon!
yours,***

若是A说的真话,则是B打破的
但此时C说的“不是我打破的”是假,所以是C打破的.矛盾,舍
若是B说的真话,则是D打破的
但此时C说的“不是我打破的”是假,所以是C打破的.矛盾,舍
若是C说的真话,则不是C打破的
但此时D说的“B说谎”是假的,则是D打破的.矛盾,舍
若是D说的真话,则B说谎,则不是D 打破的
此时C说的“不是我打破的”是假,所以是C打破的.
所以D说的是真话,C打破的玻璃

第一题
THE MOST是最高级,..用单数
这是日常现象 不用HAS
在城市里最普遍的从一个地方到另一个地方的交通方式是工交
第2题强调句型 关键是前面强调还是后面
句子可以转化成
they did the experiment in the lab （ ）was taken charge of by Mr.Harris
这里只能用WHICH
而强调句的一大特点是拿去IT WAS ,THAT句子照样通
第三题
HAVING DONE 是对上面这件是事情状态的解释