真心求教一道量子力学题这是一个习题书上的但我看不懂,a a+是谐振子的升降算符有(expλa+a)a(exp-λa+a)

物理,即为悟理,就是要去感悟道理.
应勤思考,多提问.

望采纳

但那里没有你的身影
“快来人呐……快来救救我的孩子……”一个个子不高的中年男人怀里抱着一个十几岁的男孩
我也告诉你,昨天是你,明天是你们
他给父母及亲人心中烙下了一个深深的痛
啊·“你都这么大人了,还不懂得让着表妹,还惹她哭

1.这首歌唱的真是太好了,既柔和又大气,（强烈）地震撼着人真心.
2.这首歌唱的真是太好了,既柔和又大气,（深深）地震撼着人真心.

People in our country have no special sense for this,I really appreciate your deeds.

把这段话格子打起来,就是竖着6条线,横着3条线`

热带季风气候,热带雨林气候

又走了许多年
那个拥有深邃而坚强具备优等思想的你
这些年,每当落叶泛黄的时候,我还是会想起你
我们坐在那黄昏的院落
啊·才是我们不变的初衷

I'm really looking forward to our holiday.

I think （about,关于） talking to your mum.
我考虑跟你妈妈谈谈.
think about doing,考虑做某事.

右边 先算10-8=2
再算60-2=58

证明： 因为AE=BD
角EAB=DBC=60度
AB边公共
所以三角形EAB全等于三角形DBC
所以角ABE=角DCB
又因为角ABE加角EBC=60度
所以角EBC+角DCB=60度
所以在三角形中BFC中 角BFC=180-60=120度
所以角DFB=180度-120度=60度

A:SiO2
B:C
C:HNO3
D:Si
E:CO
F:NO2
G:CO2
H:H2O
I:NO
J:N2
这就是全部结果

got就相当于 系动词,并非表示过去式
比如：i got to go我得走了
原句的翻译应该是,我听说你去纽约了（乘飞机,take off是起飞的意思）

是语法呢?
in 是副词,意思是大概是（颜色）进入(眼睛）,see in colors－>颜色进入（眼睛）,整句的意思是－－
猫能分清颜色吗
附故事一则：
For a long time people assumed that cats could see only gray tones.In the meantime we have learned that they can distinguish between some colors:for example,red and green or yellow and blue.Colors do not play a major role in a cat's life.A cat's eye orients itself to light and dark.It acts like a camera.In bright sunshine the pupils contract; at dusk they expand and catch even the tiniest glimpse of light.In this way your cat sees about six times better than you do .Cats can also "hear" with their eyes.Cats' eyes have nerve cells that transmit to the brain sounds that the ears no longer perceive.That's how even blind cats can catch flies.

Something happens on Thursday,the day I did not come in and join efforts to bid farewell to you ..sorry ..
I do not speak English so I did not say much ..but I am afraid of pronunciation are not allowed to ...and you really become good friends ..
You are now back to Germany,and we are all good miss you,and good hope you can play here more than two weeks.
You go back to Germany,do not forget us ..we will always be friends ..
I wish you happy foreve

True to me a few people,I really care about how many people.

Sitting by the stage,she is telling the grieve and growth that she has been through this year.Although having met so many obstacles and hardships,but looking back,all the hardwork and pain had paid off,this also reminds me of all that I've been through and gained throughout this year,coming this far,begining with myself to the company of 20 today.I can see the improvement it has brought to us and the reason that we peresist.These youths are willing to pay the price of their youthful years,just because it discovered our hidden potential and that it coincide with our dream,its worth giving our everything for it.In the days that yet to come,we will perservere,despite whatever that comes.we will leave a impact and influence more youths.
累死了 .

《书虫》或牛津双解的名著阅读,500个单词
书虫《远大前程》In this summer holidays,I read a book called < Great Expectations>,it was written by Charles Dickens,one of the most famous English writers.He wrote lots of wonderful novels.This book is one of his compositions.
People always like to compare with their friends.It is a big foible of all the people.If other people have a lot of money,we also want to be rich.If all the people around us are poor ,we never mind that we are very poor,too.we will not ashamed because of our folly.This is a social problem.
If we never possess anything,we will not mind we lost some thing.Since we don’t want to be very rich ,we will not feel despond because poor.
The protagonist of this novel is Pip (Handel).His parents died when he was a baby.His sister had brought him up ‘by hand’.His sister married to Joe Gargery,the village blacksmith.They didn’t have much money,and Pip never went to school to study.But he was often very happy .Because all of his friends are like him.It isn’t very unfortunate to them,this is their lives.But by a chance,Pip helped a convict; he gave much food to him.Then he met Miss Havisham,a very strange old woman and she was very rich.
Four years later,Miss Havisham wants Pip to be removed from his home and educated as a gentleman who expects inherit a fortune when he grow up.
After hearing that .Pip started to despise his poor friends.He even feel ashamed because he live with the poor man .Pip’s ‘great expectations’ destroyed his life.
This novel told us that we cannot compare with others .Don’t feel envy at the others money.And if one day you be very rich ,please don’t despise your poor friends.

恩,做错题目以后要分析错误的地方,对做题方法要加以巩固,当你把所有的错题再合上书且不看答案的情况下都能做出来且没有思路上的错误的情况下,你的物理成绩应该会有提高的.刚开始的时候,可能很痛苦,不看书和答案的情况下,有些可能要很久才能做出来,但一定要坚持.在实在做不出来的情况下才去看答案,但是看了以后要弄懂思路,且该题要重新从头到尾做一遍.这很重要!

project operation
At the same time of commercial operation,team needs to complete without project,such as brand design, product
display, business plan and sales plan, etc. Each team has the same time to
prepare and show judges the results. Each wheel project show is a small
competition, winning teams get a bonus, the award gold medal into the profit and
loss statement for the next round of capital operation. Project operation can
develop creative thinking and leadership skills, team cooperation ability,
speaking ability and business English skills.

分外：
他今天显得分外兴奋.（超过平常）
你少管分外之事.（本分以外）
天真：
小铭是个天真、可爱的孩子.（单纯）
你这个人看事情太天真了!（头脑简单）

假如不是你的东西,即使一丁点儿也不应占有.何况如果不用真心换真心,思念就只能像水中月、镜中花,都只能留在向往中了!

C

There are two of me in the world. One pretends to be happy, the other is really sad.

af(u)+bf(1/u)=c/u
用1/u代换u
af(1/u)+bf(u)=cu
联立两式,消去f(1/u)
a²f(u)-b²f(u)=ac/u-bcu
(a²-b²)f(u)=ac/u+bcu
f(u)=(ac-bcu²)/u(a²-b²)

管鲍之交
管鲍分金
鲍子遗风
生我者父母,知我者鲍叔

有甲走5/11可知,甲乙速度比为5：6；
若甲速度4.5,则乙为5.4
可知距离为5.4x5=27

Tan Jia,I have feeling with you,and I will always do if it can touch you.Trust me,it is the 1st time in my life to be brazen-faced for love,I swear to God!

I very want to have some foreign friends,my English is not good,I hope you can be patient and make friends with me

可变电阻R与阻值为2欧的定值电阻串联后,接到内阻为3欧的电池两端构成闭合电路,当可变电阻阻值R=_1____欧时,电源的输出的功率最大,当R=__5___欧时,可变电阻得到的功率最大.
电源的输出的功率 P1
P1=I^2(R+R0)=E^2(R+R0)/(R+R0+r)^2=E^2(R+R0)/[(R+R0)-r))^2+4(R+R0)r)]
当R+R0=r R=1欧
可变电阻得到的功率P2
P2=I^2R=E^2R/(R+R0+r)^2=E^2R/[R-(R+r))^2+4R(R0+r)]当R=R0+r R=5欧

亲爱的 wang,
除文件之外,我今天在报价上派遣了你,请恐怕最好引述下列的文件,当我有想要一些其他类型的产品的一位新的客户之时:
1) 女人圆领汗衫短袖,100% 棉花互锁,200 g
2) 女人圆领汗衫短袖、 95% 棉花、 5% 弹性蛋白,200 g
3) 女人 polo 衫短袖,100% 棉花互锁,220 g
4) 女人 polo 衫短袖、 95% 棉花、 5% 弹性蛋白,220 g
类型注意
谢谢你的回应.
亲切地答复下列的疑问- 相同于梳头发的棉花是资讯 (纯粹的棉花)?如果不,什么是他们的不同?
在此际内请小心地读下列的指导,因此我们能确定以便我们将会得到最正确的价格.
1) 技术上的文件将会被送二分开的邮件.与这邮件去文件 nr 一,和与第二个邮件另一个文件.
2) 每个文件有少数多页,表现图形申请的多元化- expl 第 1 页表演 2 次以来,第 3 页表演 3 次.在每个边图形上是些微地不同的,因为客户仍然没有选择最后的地面区划.
3) 图形申请的类型是刺绣品片.片应该是一个质量一.请提供数据多少缝线刺绣品应该是为了要是一个质量一.
4) 请为 1000,2000,3000,4000 和 5000个个人计算机引述价格,因为客户表示扩大的 qty 的可能性.
5) 是必需的是,你告知我棉花的类型.(因为 expl 是它,半梳头发,否则棉花梳头发或者一些别的哪一个也许在较好的质量中)
对于所有的较进一步的疑问,请不犹豫连络我.
类型注意
文件 nr 2
类型注意
文件 nr 2
类型注意

不欢迎，因为他们对外人的要求很高，而且还嘱咐说如果来晚了，山洞就封了。

F=AB'C'+A'B'+A'D+C+BD (绿色的5项)


=B'+C+D (红色的3项)



你画的图是：

1.下式减上式得到k1=-3,带入第一个式子得到b=9
2.mx²【平方】是什么意思mx²还是mx²再平方?

No one can replace you in my heart.I only love you!I hope you can understand that I am serious.

质粒也是双链首先,你说的基因双酶切之后,是有两个切口,但应该是两个粘性末端,（当然了,这只是个说法问题）.质料是双链环状,一个切口之后,也是有两个末端,那这两个末端就可以与基因上的末端连接了.另外,在真正的实难...

（542B） == 数字依次减去111 （653-111 == 542）,字母按ABCDEF倒排 （FEDEA）

去百度查查,都有的.

用Could you do sth句型
或者Would like to do sth...
委婉语气.征求别人认可

正比例函数是形如：y=kx,其中k≠0 ,x的指数为1,不含常数项.
∵对于（1）y=-2x+2中：k=-2,但是它还有常数项2
∴（1）不是正比例函数；
∵对于（2）：y=x平方中：x的指数为2,不是1
∴（2）不是正比例函数.

There are two real me in the world.One is glutton,another is the one who desire to be slender.

“如此青春”的英语翻译应该是 so youthful 而不是 so the youth.
“青春”在这里是形容词,而 the youth 是名词,youthful 才是形容词.

VB程序设计时“:“表示在一行上书写多个语句时中间的分隔.
;(注意必须是英文的分号,而不是你所打的中文标点.)表示在print语句中输出多个数据时紧凑输出.

k,b决定函数图像的位置：
y=kx时,y与x成正比例：
当k>0时,直线必通过第一、三象限,y随x的增大而增大；
当k0,b>0,这时此函数的图象经过第一、二、三象限；
当 k>0,

(1)原极限=(x-1)[x^(n-1)+x^(n-2)+.+x^2+x+1]/(x-1)=n(x趋于1) (2)原极限=(x^2-1)/(x^2-x)=(x+1)/x=2(x趋于1)

OP=(x,y),与OP垂直的向量(a,b)满足ax+by=0,所以a:b=(-y):x,所以向量(a,b)可取作k(-y,x),k是任意实数.
讨论n的奇偶性,函数的单调性、对称性,其图形与y=x^2,y=x^3类似.

答案如下：
1 How does
2.It's by watching
3.how to
4.It's to understand
5.improve

您好,这是您在做实验吗?方便的话发一下您做实验的一些照片看看,看你的实际情况到底是怎么样的