9數位組成的六位數有多少種組合,用什麼軟件能把它們全部羅列出來.

9數位組成的六位數有多少種組合,用什麼軟件能把它們全部羅列出來.


最高位是1~9,共9種選擇,其後的五位數每位都有0~9共10種選擇,也就是有9乘10的5次方個組合.要全列出來的話,在excel表格中第一位輸100000(最小6位數)然後往下進行序列填充就可以了,只是數據量相當大,有這必要嗎?



求0至9這十個數位組成的所有三位數的組合,用VB6.0
百位可以是0,如012
求的是組合,不是排列.如012 021 120 102 201 210這6個數只需輸出012就可以了,要像輸寫012一樣```最小的數位在前面,最大的數位在最後
總供的數據個數是120個吧(應當是的),輸出到text1
隨便用什麼方法求,越特別越好,
一樓的我看過了,是可以用,雖說他可能用的是VBnet,但是我想要其它不一樣的方法,(特別的方法),呵呵,再等下,沒人答就給一樓你分了,


是120個.大體上這樣就行:
for a = 0 to 7
for b = a+1 to 8
for c = b+1 to 9
text1.value = text1.value & a & b & c & vbCrlf
next
next
next
其他的什麼表單、按鈕、觸發什麼的自己隨便搞下吧.



6位數銀行密碼0到9數位,可以組成多少組密碼?
我算是1百萬,999999另加6個0,我們組織財務說可以組成上億組,知道到底可以組成多少


你算得是正確的.你們組織財務水准沒你高.
有知識的人給沒有知識的人打工,這句話講的沒錯.



一輛滿載西瓜在水准路面上勻速行駛的汽車,緊急刹車,加速度為a,設中間一質量為M的西瓜,則它受到其他西瓜的作用力大小為多少?
_______
m√a2+g2


其實很簡單的,因為該西瓜在中間,所以它要受到其他西瓜的一個向後的力來提供這個加速度,該力大小為Ma .又因為豎直方向上的合力為零所以它還要受到其他西瓜對他的一個向上的力來平衡重力,該力大小為Mg .把這兩個力求合…



光滑水平面上,足够長的木板質量m1=8kg,由靜止開始在水准拉力F=8N作用下向右運動.如圖所示,當速度達到1.5m/s時,將質量m=2kg的物體輕輕放到木板的右端,已知物體與木板之間的動摩擦因數μ= 0.2.求:
(1)物體放到木板上以後,經多少時間物體與木板相對靜止?在這段時間裏,物體相對於木板滑動的距離多大?
(2)在物體與木板相對靜止後,它們之間還有相互作用的摩擦力嗎?為什麼?如有,摩擦力多大?(g取10m/s2)
我搜到了答案,也明白答案的意思,就是不知道開始物塊為什麼向左運動,而且是一直向左運動,他不是受到向右的摩擦力麼,請幫我描述一下它的運動狀態


就比如上車後開車提速過程,車加速人往後傾斜.假設物塊間無摩擦,M就是一直相對M1向左運動.他們之間有摩擦,M運動方向相對向左,由於有向右的摩擦力,所以M會加速,但由於一開始速度M1》M,所以M會向左運動,當M提速到M1相等時就相對靜止了



一道英語物理題
By how much does the water pressure exceed atmospheric air pressure:
a.)1 m below the surface of a pool(of fresh water)?
by Pa
b.)7 m below the surface?
by Pa
________________________________________
c.)How far below the surface do you have to go,before the total pressure you feel is triple that of atmospheric pressure at sea level(itself about 100000 Pa)*?
m
(*Hopefully from this,you'll gain an appreciation for just how much our normal atmospheric pressure is -- and that us human beings really do live“on the bottom of an ocean of air.”)


a)
p
=ρgh
= 1000*9.8*1
= 9.8*10^3 Pa
b)
p
=ρgh
= 1000*9.8*7
= 6.9*10^4 Pa
c)
p =ρgh
(3-1)*10^5 = 1000*9.8*h
h = 20.4 m



一道物理英文題
The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v =(–5.00×107)t2 +(3.00×105)t,where v is in meters per second and t is inseconds.Theacceleration of the bullet just as it leaves the barrel is zero.
(a)Determine the acceleration and position of the bullet as a function of time when the bullet is in the barrel.
(b)Determine the length of time the bullet is accelerated.
(c)Find the speed at which the bullet leaves the barrel.
(d)What is the length of the barrel?


(a)a=dv/dt=2×(–5.00×107)t+(3.00×105)s=(1/3)×(–5.00×107)t3 +(1/2)×(3.00×105)t2(b)let a=0,then t=0.294393s(c)let t=0.294393,then v=46.3668m/s(d)let t=0.294393,then s=9.10003m…



英語翻譯
a pulsar is a celestial object that emits llight in short burst a pulsar in the crab nebula flashes at a rate of 30 times/s,suppose the light pulses are caused by the rotation of a spherical object that emits light from a pair of diametrically opposed“flashlights”on itsequator.whatis the maximum radius of the pulasae if no part of its surfacecan move faster than the speed of light?


A pulsar is a celestial object that emits light in short burst.脈衝星是一種能够發出光脈衝的天體.A pulsar in the crab nebula flashes at a rate of 30 times/s,suppose the light pulses are caused by the r…



If an electron loses 2.5E-15 J of energy in travelling from the cathode to the screen in a home computer,across what potential difference must it travel?


“電勢”升高,電勢差為:
U=W/q=(2.5E-15)J/(1.6E-19)C=15625V=15.625KV



Lillian(mass 40.0 kg)standing on slippery ice catches her leaping dog(mass 15 kg)moving horizontally at 2.0 m/s.What is the speed of Lilian and her dog after the catch?


李連(重40kg)站在很光滑的冰面上,他的狗以2.0m/s的速度向他滑來,問他接住他的狗後,他們的速度是多少?
將李連和他的狗看作一個系統,在水准方向沒有任何外力作用,應用動量守恆,設接住狗之後,他們的速度為am/s
則15*2=(40+15)a
a=6/11 m/s