大学英语二 1.Mr.Smith declared that he did not want _______ up an

The stared college's daily life take me a deep feels that's so busy.

欧拉方程~
具体解法查下书吧

This I have the greatest impact on people not mom and Dad,also is not the teachers and classmates,but a sweep the street cleaners.He is an old grandpa.His gray haired,bent,have experienced years of wind and frost face engraved with a coarse wrinkles.Once,I pass by from him,inadvertently he sweep clean throw a piece of paper.He immediately turned and picked up:"the kids,to speak of civilization." From then on,I see the rubbish on the road,always bent over to pick up the.I should also like Grandpa,for the benefit of people!

B,B,B,A,C,B,A,B,C,D

先把它们乘开，然后分别对X和Y求二阶导，A＝对X的二阶导，B＝对XY的二阶导，C＝对Y的二阶导，B方－AC小于零有极致，A大于零有极小值，A小于零有极大值，谢谢，一定要采纳喔，用手机回答这个问题真不是很方便的

大学四年临近毕业,同学们都面临就业难这一现实问题.这是普遍的现象,即矛盾的普遍性.然而,由于每位同学的专业、性格特征、理想等方面的不同,因此对工作的选择方向也不同.于是,每位同学在求职过程中遇到的具体困难是不一样的,这就是矛盾的特殊性.
二者的相互关系为：一方面,普遍性寓于特殊性之中,并通过特殊性表现出来,没有特殊性就没有普遍性.个别同学面临的具体难题都包含在普遍困难之中,大家都要共同面临就业难题.另一方面,特殊性也离不开普遍性.不包含普遍性的特殊性也是没有的.矛盾的普遍性和特殊性在不同的场合可以相互转化.在宏观的就业问题之下,微观即具体的问题也是依附宏观层面问题而存在的,二者不可分离.

是自由电荷,因为导体球带电,带的电是自由电荷,不要想太多了.
根据D的高斯定理,求出D就等于自由电荷面密度,那么E知道了,进而P知道了,进而极化电荷面密度也求出来了.

L:Hello!How may I help you?
S:Hi!I’m trying to find a few books,but I’m lost.
L:OK.What books do you need to find?
S:I need to find three English conversation books by Professor Brown.
L:All right.Those books are at the main desk on the third floor.
S:How do I get there?
L:Just take this elevator up two floors.The desk is right outside.
S:Great.Thank you very much!
L:You’re welcome.Good luck!
Barry:Hey Larry~It's great to see you here!
Larry:Oh,hi Barry~What's up with you lately?
Barry:I have been quite busy working around the house.
Larry:Oh yeah?I hope everything's going smoothly.
Barry:Well,actually,could you give me a hand this weekend?
Larry:Is it to do with your house?
Barry:Yes,landscaping my yard.
Larry:That sounds like a big job.
Barry:It might be,it depends on how I decide to do it.
Larry:You don’t know yet?
Barry:I can’t make up my mind.I’m vacillating between desert land-scape with cacti or lush green grass with lots of flowers.What do you think it should be?
Larry:Well,a desert landscape has a lot less maintenance,but nothing beats a nice green lawn.
Barry:Thus my dilemma.What would you do?
Larry:Let me ask you this- how much time will you spend out there.
Barry:With my schedule,probably not much.
Larry:Then I would go with the desert.Keeping up a grass lawn is a lot of work.
Barry:Yea,I think you are right.
Larry:Ok then,I'll see you this weekend.
Woman：Hello,is that the police station?
Police：Yes.
Woman：Is it true you catch burglars（窃贼）?
Police：Yes,that’s right.
Woman：Could you catch one for me?
Police：Pardon?
Woman：I haven’t got any keys and I don’t know how to get into my house
A：Why are all those people running?
B：They are running a race to get a cup.
A：Who will get the cup?
B：The person who wins.
A：Then why are all the others running?
A：I’m fed up with my marriage.
B：Why do you say that?Everyone thinks that you have a wonderful wife.
A：Oh,no.Years ago,when we were poor,we had to do our best to make ends meet.It was a hard time,but we were happier then.
B：Now you are quite rich,aren’t you?
A：Yes,but we are always squabbling（争论）about unimportant things.
B：That sounds like everyday married life to me.
The distinguished old man was being interviewed by a journalist.“ I understand,sir,” said the journalist,“ that you have just celebrated your ninetieth birthday.”
“ That is correct － ninety years of age and I haven't an enemy in the world.”
“ That's wonderful,sir.”
“ Not an enemy in the world.They're all dead!”
“ Well,sir,I hope to have the privilege of interviewing you on your one hundredth birthday.”
“ I don't see why not,young man,” said the eminent personage,“ You look perfectly fit to me!”

投到那个面上,令除开该面后的另一坐标值为0,例如
投到xoy面上,则z=0

按问题顺序：
一、写完作文发卷纸,快速阅读和作文是在一张答题卡上的
二、先做快速阅读然后听力
三、这个时间要你自己掌握了,没有单独预留给你看的时间,所以你只能挤时间看.

这是"*/无穷"的
洛必达法则
一.从第一个圈到第二个圈：分子、分母分别求导.对分母x求导为1,对分子求导为复合函数的求导,得：2(1/x)lnx.
二.然后再用洛毕达法则对(lnx)/x求导.

你英语考试怎么答题就怎么答题,不知道是否竞赛也是考阅读什么的.但就按你高中那一套走,估计也就是单词量的问题了,买一本英语阅读材料,有中文翻译的那种,每天读一篇,然后把不会的单词记下,自己第一次读不能理解的句子对着中文翻译自己理解.做到再读这篇能自己完全翻译出来,如果你能坚持一本阅读材料都这样看完,保准你水平大提高（起码的30篇的,难度适合你的你买大学四级考试阅读理解做也好可能开头会难等多背了单词就好了）

循听力的规律,利用精听和泛听,双管齐下,让自己的耳朵,每天有5个小时泡在英文里,具体如下：
1.泛听就是能够对语流非常熟悉,英语中的常用句型的声音能够非常快速地判断出来,不断地使自己熟悉并进入英语的声音当中去,每天1个小时.
2.精听则是对语流当中的细节非常熟悉,英语当中的不常用单词和不常用句型通过听写,听--复述的方式不断熟悉和加强每天50分钟.这样反复训练到临考前再学个北京新东方的六 级精讲精练班效果肯定好.

Assume that you are Hua Li. Your English friend Jill will come to Guangdong for college in September this year. He wrote to you to advice on how foreigners obtain driver's licence in China.
[writing content] Please outline the following in Chinese, English, wrote back to Jill:
Application requirements
16-70 years old; not less than 150 cm height;

Process
Application---- to get a medical examination at specified hospital--written examination for traffic laws--Two months driving training-- driving test;

Fees
About 4,000 RMB;

Other
If you have a foreign driver's license, you just need to take a written examination. It will cost about 300 RMB.
回信内容：
Dear Jill,
In China, people who wants to apply for driver's license have to reach 2 requirements. They must be between 16 and 70 years old. And their stature can not be under 150 cm. When meet the 2 points, they need to submit their applications and get a medical examination at the specified hospital. People who fit the health standard will take a wrtten examination for traffic laws at first. Then, the eligibles should take 2 months driving training before driving test. People who have passed the driving test will get the driver's license. The fare is about 4,000RMB. But, If you have a overseas license, you only need to take the traffic laws examination. It may cost about 300 RMB.

由于dv/dx=(dv/dt)*(dt/dx),而dv/dt即加速度=d^2x/dt^2,dt/dx=1/v,所以vdv/dx=d^2x/dt^2

我给你的建议首先是耐下心来,最基础的肯定是背单词,就想我们开始学汉语的时候要学写字是一个道理的.每天抽出一点时间来读课文,最好是有人陪你一起,早晨吃晚饭读半个小时~
找一找自己喜欢类型的美剧,找有双语字幕的,看完一边内容,再尝试去听懂,不懂的看一看字字幕,然后查查这个单词,回顾下这个句子,就知道这个单词的用法是什么了.
最重要的还是自己要能耐心,语言这个东西不是说你努力一个月就能见效的,很有可能是需要3-6个月才会初见成效,一旦上道了,进步就会很快了.加油!不要灰心!

蛋白质分为分泌蛋白和组织蛋白.而且高尔基体在植物中与细胞壁合成有关,在动物体中才与分泌蛋白有关.

整个球壳电势为0,包含了这层意思：球壳各处电势相同.按这个意思,你觉得电荷该如何分布呢?显然平均.

偏高了,二氧化碳溶在氢氧化钠溶液中,相当于增加了要滴定的酸的量,这样的话,需要更多的氢氧化钠溶液,最后计算的时候,所用的氢氧化钠溶液的体积那一项是偏高的,算出的酸的浓度就也是偏高的.

1.I was a art student since I was young.Our main subject was art.Frankly,I have never attended science lessons,including the complusory biology and physics lessons before university,none of us had.
2.Jellyfish can be clearly seen swimming at intersection of the Huanghai & Bohai Seas.

.直接背新概念3和4不就OK了.

[v0,v] ∫ dv = [0,t] ∫ 12j dt
v |[v0,v] = 12jt | [0,t]
v-v0=12j(t-0)
v=v0+12jt = 5 i + 12t j

问一下那个商是二加根下四减X方么?

第5行依次与第4,3行交换
第6列依次与5,4,3列交换
D = (-1)*
1 1 1 0 0 0
x1 x2 x3 0 0 0
x1^2 x2^2 x3^2 0 0 0
a1 b2 c1 1 1 1
a2 b2 c2 x1 x2 x3
a3 b3 c3 x1^2 x2^2 x3^2
= [(x2-x1)(x3-x1)(x3-x2)]^2

这有三册了.

我觉得写第二十三课比较好!

Mary regretted a lot that she wasn't able to help her sister and brother finish their college education.

题目让求的是自感还是互感呢?就互感而言,M12-M21没错.当线圈1通过电流I1时,其产生的磁感应强度：B1=uN1*I1/L截面积S1=π*R^2ψ21=N2*B1*S1=uN1*N2*I1*π*R^2/LM21=ψ21/I1=uN1*N2*π*R^2/L同理,有：M12=uN1*N2*π*R^...

Is It The Only Way Out To Go To College
We had a discussion about whether it is the only way out for senior students to go to college．Views vary from person to person.
The majority of us consider it very necessary to go to college．They think it can widen their knowledge and improve their qualities．Only in this way can they find better jobs after graduation．Very few students,that is about ten percent of the students think it no use going university,because the tuition is too high for their family to afford．What’s more,it’s rather hard for college graduates to seek satisfactory jobs．Thirty percent of the students,however,believe “All roads lead to Rome．” Therefore it doesn’t make any difference whether they go to college or not．
In my opinion,we can receive a better education at college so that we can serve our motherland．

1、矿物粉碎
2、磁选法：强磁Fe3O4,弱磁MnO2,无磁SiO2；将三种主成份分开；
3、SiO2：用Na2CO3高温处理制水玻璃
SiO2 + Na2CO3 = Na2SiO3
水浸取就得到水玻璃
4、Fe3O4送冶炼厂直接炼铁：
Fe3O4 + 4CO = 3Fe + 4CO2
5、MnO2用碱处理生产高锰酸钾
2MnO2 + 4KOH + O2 = 2K2MnO4 + 2H2O
2K2MnO4 + 2H2O (电解） = 2KMnO4 + H2 + 2KOH
解决方案不可能是唯一的,仅提供一种.

My English level has downgraded, I used to be good at it, but I have a good basis and my major in university is educational English. I believe I can have a big breakthrough within a short time.
Hope you can give me an opportunity, I will do it with flying colors.
希望可以帮助到你

P(X>d) = 1-P(X= 0.9,
即:1-Φ[(d-3)/2]>=0.9,
得:即:Φ[(d-3)/2]

只有能量是两个能级的差,原子才能够吸收.能量是量子化的,是不连续的.

一般测得β2的值在>2

据说有人证明过 不过我的理解很简单 那就是我们规定的 就好像 称呼我们是人 房子是房子一样 如果我们的祖先给房子取个其他的名称 现在的房子就不是房子

当然有错了,2-乙基错了.
5-甲基3-乙基-3异丙基庚烷.

没有英语环境想进行双向交流恐怕不太可能,除非你参加一些英语口语俱乐部之类的组织,和里面的人进行交流.个人认为,你可以在看英语影片的时候也跟着演员的台词说英语,效果还是不错的,尤其是看一些生活类的英语影片

My dream is go to college.
Please allow me to say a few words.
He told me to finish the task in the morning.

这可太多了,有机中主要有熔点及沸点的测定,重结晶及过滤,蒸馏,水蒸气蒸馏,减压蒸馏,分馏,萃取,以及制备各种化合物,无机比较简单,主要是对物质性质的鉴定,一些鉴别反应,分析中,化学分析部分主要是滴定还有热分析法,仪器分析部分是对一些仪器的操作,如高效液相色谱,气相色谱,红外紫外分光光度计,核磁,大概就这些了.

英语作文我的学校My school is at Haimen Town.It is very big and beautiful.There are forty-three classes in it.When you come to our school,you can see the modern teaching building.
Our teachers work and do practice in it.Behind the building,there are two classroom buildings and a school library.In the library there are thousands and thousands of books.After clayou can borrow the books you want and also you can read them in the reading room at any time.
Beside our classroom,there is a big playground.At about 4:30 p.m.every day,many students play football,basketball and some of them play tennis.All the playground is alive.
Our school is a model school in Jiangsu.I like my school very much.
There is my new school covering an area of 100 mu with a river which runs around the clock.It's so beautiful that you almost forget to do what you are going to.If you walk on further,you will find a big flower bed which is full of all kinds of flowers,
and a tall building filled with hi-tech facilies to make our study easier and more convenient.Along the left bushes stands our canteen,where cooks provide delicious food every day to keep us healthy.If you are lucky,you will see birds which students and teachers raise together,and they always fly in the sky freely.
Ok,that's all.That is my new beautiful school!
My School
This is my school,it is so big and beautiful.School classroom very capacious,also extremely clean,our teacher is very friendly to us.Our school is in stationery shop opposite.Our school learning environment is very good.
We study at school very happy!I love my school!

平时成绩每次做实验会打分,原始记录纸（50）实验报告（10）思考题（40）
一共16次实验,把十五次成绩的70%加上一次考试（从十六个实验里面选择一个）30%就是你的成绩了.一些简单的实验好做后面的实验老师还会检查你到底做出来没,有的人抄别人的数据,注意技巧,容易过,但也确实蛋疼,你是机电学院或者采矿啥的吧.

1、没有关系,同一方向直线与圆两侧相切,那间距就是直径呀.
2、只要保证十字刻线中的竖叉丝与各级牛顿环的中心对齐就可以了,尽量不要选择竖叉丝内切或外切.
3、只保证保证十字刻线调好了,利用竖叉丝就可以搞定.你的方法不太好吧.

是

1/2*9/10+1/3*14/15+1/6*19/20=331/360

也就是四书五经的“五经”.《诗经》、《尚书》、《礼记》、《周易》、《春秋》；简称“诗书礼易春秋”.
希望可以帮助你.

（1）能将过氧化氢氧化为氧气
原因如下：
三价铁与过氧化氢的反应,全反应式为：
4Fe3+ + 2H2O2 ----》 4Fe2+ + 2O2 + 4H+
该反应可以分为两个半反应,分别为：
Fe3+ + e- ---》 Fe2+ 依题意,φ = +0.77
O2 + 2H+ + 2e- ---》 H2O2 依题意,φ = +0.682
另有全反应的自由能量G= - vFφ （F为法拉第常数,v为移动电荷数）
自由能量为负时,反应会自发发生
又,全反应 φ的变化为两个半反应的 φ的差
此题中,该差为正数,全反应自由能量为负,反应自发进行.
（2）⊿G＝－RTlnK= -vFφ
可得K=exp(-⊿G/RT) = exp(vFφ/RT)
全反応式：Fe + 2Fe3+ ----> 3Fe2+ + H2
半反応式分别为：
Fe3+ + e- ----> Fe2+ φ= +0.771
Fe2+ + H2 ----> Fe + 2H+ φ= -0.414
半反应的上式减下式即得到全反应式.
所以该反应全反应的φ为+0.771-（-0.414）= 1.185
另外,反应中有两个三价铁,每个三价铁对应一个电荷移动,所以电荷移动数为2,即v=2
法拉第常数为F= 96.485 kC/mol
所以K= exp(2 * 96.485 kC/mol * 1000/k * 1.185 V/ (8.3145 J/Kmol * 298 K))
另外,1J = 1CV,
上式可以计算得出K=1.2054 * 10^40