x=x+x=x*x=x-x/x只能填1到8,且每個數只能用一次

x=x+x=x*x=x-x/x只能填1到8,且每個數只能用一次


此題無解,因為第一個數要可以=兩數的積,而且每個數位都只能使用一次,所以第一個數只能是6或者8因為後面有x-x/x
所以第一個數位不為8那只能是6了
6=2*3
6=1+5
還剩下4 7 8三個數無法滿足x-x/x=6
所以無解



用三個0和三個9組成六位數、、、
1、一個也不讀出來,這個數是().
2、只讀一個0,這個數是().
3、讀出兩個0,這個數是().
4、組成的六位數中,最大的是(),最小的是().


1、一個也不讀出來,這個數是(999000或909900).
2、只讀一個0,這個數是(909009或909090或990009或990090或990900).
3、讀出兩個0,這個數是(900909).
4、組成的六位數中,最大的是(999000),最小的是(900099).



從0~9,這十個數位以7位數排列共有多少種變化.


數位不重複:9x9x8x7x6x5x4,總共7個位數,第一位若取0則無意義,所以第一個數位有9種取法;第二比特因前面取了一個數位,但這時可以取0,所以仍有9種;後面依次類推.
數位可重複:此時最大數為9999999,0-9已經包含了構成自然數的全部因數;而題意限制為7位數,所以實際此時就有9999999-1000000(此為7位數最小)種變化,即8999999種



幾句中文翻譯成英語.高中水准的
1.我的兄弟和我在許多方面都不同(differ)
2.她渴望有一份工作(anxious)
3.他寧願租一輛車也不願買一輛屬於自己的(prefer的用法)
4.聽說他會來,但是他還沒露面(turn up)
5.你答應過幫助的,現在不可食言(back out)
6.你的意思沒有真正被理解(get across)
7.他的學識令我吃驚(amaze)
8.我格守我說過的話(stand by)
9.箱子太重了,我提不起來(so.that)
10.在擁擠的地方,沒有車位可用(available)
11.我們的汽油用完了(run out of或run out)
12.這沙發在夜裡可以當床用(function as.)
13.你們國家過耶誕節嗎?(observe)
14.你的英語方面沒什麼進步(make little progress)
15.幫他沒用,他自己都放弃了.(It is no use doing sth)


1.I differ from my brother in many ways.
2.She is anxious for a job.
3.He would rather rent a car than buy one for himself.
4.It is said that he will come,but he hasn't turned up yet.
5.You promised to help me,and you can't back out your words.
6.Your meanings didn't get across.
7.His knowledge surprised me.
8.I stand by what I said.
9.The suitcase is so heavy that I can't carry it up.
10.Parking lots are not available at crowded places.
11.Our gas has run out.
We have run out of our gas.
12.This sofa can function as a bed at night.
13.Do you have/observe Christmas Day in your country?
14.You made little progress in your English.
15.It is no use helping him while he gives up himself.
不明白的再問喲,請及時採納,多謝!



要一篇高中的英語自我介紹!要有中文翻譯的哦!


Dear Teachers and students,Hello,my name is _______,I am ____now,I just graduated from ________.I'm very excited to meet and work with new classmates and teachers that we will have for the next few y…



英語翻譯
我是高一的,學的是人教版的英語求幫反映一下6條中文括弧內的是提示詞1.他决定去山谷.由於他的態度很堅決,想往常一樣,我們只好讓步.(valley,attitude,determined,as usual,give in)2.我們朝山谷緩慢而行,在寺廟下看見一個洞穴.(pace,temple,beneath,cave)3.我們彎下腰,進入洞穴,發現了很多東西,如一小包毛織品,一個枕頭,甚至一張保險單(insurance ticket).(bend,parcel,wool,pillow)4.洞裏還有火焰,水在沸騰呢.(flame,boil)5.曾有人預測在午夜洞穴裏的風景相當不錯.(forecast,at midnight,view)6.看來這些見解是可靠的.(view,reliable)


個人見解,有錯勿怪. 1.He decided go to thevalley.Ashis attitude was strong as usual,we had to give in. 2.We paced to the valley slowly,and saw the temple beneath there is a cave. 3.Bending into the cave,we have found manythings,such as a parcel of wool,a pillow,and even an insurance ticket. 4.There also have some flame and boiling water in the cave. 5.Once someone had forecast that the view in the cave must be beautiful at night. 6.It seems that these view are reliable.



英語造句高中水准要有中文翻譯
(1)has a good effect on(2)be proud of(3)be self-confident(4)under the pressure(5)share sth with sb


reducing the number of cars has a good effect on global warming.减少汽車的使用量對溫室效應有好的影響
i am proud of what you have done.
我為你所做的事而自豪
he is self-confident when he give a speech.
他很自信當他在做演講時.
he is afraid to do it because he is under the pressure from parents.
他不幹去做著件事因為他有來自父母的巨大壓力
i want to share my felling with you about this movie.
我想和你分享關於這部電影的我的感想



英語翻譯
1Jimson被認為是該公司最有才華的職員之一(regard…as,gifted)2在大廳的前面座落著孫逸仙博士的青銅塑像(倒裝)


第二句應該是:In front of the hall stands the bronze statue ofDr.SunYixian



問一物理力學題!
放置在水平面上的物體受到斜向右下方的壓力F的作用後,仍靜止在水平面上,則該物體所受的壓力和地面給他的靜摩擦力的合力的方向是?
請提供解題思路


首先,F斜向右下,說明F在豎直向下的方向上有分力,而物體在豎直方向是靜止的,即:支持力的大小等於重力加上F的豎直分力,所以支持力大於重力.支持力與重力的合力豎直朝上.
其次,因為靜止,所以重力、支持力、壓力、摩擦力的向量和為0.
最後,既然其中兩個合力豎直朝上,那為了做到向量和為0,剩下兩個力的合力只有豎直朝下,大小與重力跟支持力的合力相等.



.三根重G的木杆對稱地擺成正四面體,長a,直徑忽略,摩擦力足够大,(1)求杆頂端受力大小及方向;(2)若有重G的人坐在某杆中點,杆不動,求此時杆頂端受力


分別設這三個杆為A,B,C杆,我們將這三個杆分為兩部分,A為一個整體,B,C為一個整體來分析.由下圖,我們將杆頂端的受力分為x方向分力Fx ;,和y方向分力Fy.其中x方向是沿A杆水准投影的方向,y方向是豎直向上的方向.
以下解答以及力圖全部見圖: