用0到9十個數組成一個四位數一個三位數一個兩位數和一個一位數使它們的和為1998請問三位數最小是多少 用0、1、2、3……9十個數位組成一個四位數一個三位數一個兩位數和一個一位數使得這些數加起來為1998 問三位數最小是多少?

用0到9十個數組成一個四位數一個三位數一個兩位數和一個一位數使它們的和為1998請問三位數最小是多少 用0、1、2、3……9十個數位組成一個四位數一個三位數一個兩位數和一個一位數使得這些數加起來為1998 問三位數最小是多少?


最小205
例如:
1736205,48,9
1738205,46,9……
四位數的千位一定是1,等價於用2~9和0組成兩個三位數,一個兩位數,一個一位數,他們和為998,到這裡是對的.
要使三位數最小,前兩位2、0無抗告.
因相加的和=998,此三位數加上一個最大的兩位數、一位數組合(98+7=105),也才僅僅=30X或31X,也就是原四位數去掉首位1後剩下的三位數必須大於600.
易知,當原四位數是16AB形式時,
6AB與剩下的三位數、兩位數、一位數不可能得到998,因照顧十位向百位進位.
考慮17AB、20X時,剩餘3、4、5、6、8、9組成兩個兩位數兩個一位數和98,並使X最小.
如X=3,則兩個兩位數十比特最小只能是4、5,個位4個數和不能進位,無解捨棄.
如X=5,則兩個兩位數十比特最小3、4=7,剩餘個位5+6+8+9 = 28正符合尾數8,進位2.
囙此最小的三位數只可能是205.



某銀行儲蓄卡上的密碼是一種4比特數位號碼,每位上的數位可在0~9這10個數位中選取,某人未記住密碼的最後一比特數位,如果隨意按下密碼的最後一比特數位,則正好按對密碼的概率是()
A. 1104B. 1103C. 1100D. 110


∵每位上的數位可在0~9這10個數位中選取,正確的只有1種情况,∴正好按對密碼的概率是:110.故選D.



6位數的密碼,用0到9的數位密碼去試,一共要多少次才能試出來


1000000的
因為可重複
其實只要999999次就行了
因為最後一次不用試就知了
另外平均數只要500000次就可以的了



一道英文的物理題
When a proton captures an electron,a photon with an
energy of 13.6 eV isemitted.Whatis the frequency of this
photon?Does it lie in,above,or below the visible range?


當一個質子捕獲一個電子時,會發射出一個具有13.6電子伏能量的光子,請問這個光子的頻率是多少?它是否在可見光頻率範圍之內?之上?之下?
E=hv=hc/lambda,E=13.6eV=2.178X10-18 J,h=6.626×10 -34 J·s,=> v=3.288X10 15 Hz,lambda=91.2nm,which is smaller than lower limit of visiblerange.Thefrequency is above visible range



英語翻譯
6、計量檢定收發室求以上六個術語的準確英語翻譯,


1.Metrological verification room 2.Thermal metrological verification room 3.Mechanics metrological verification room 4.Physical and chemical metrological verification room 5.Measurement management off…



英語翻譯


Mechanical Design,Technology of Exchangeability and Measurement,Hydromechanics,Extracurricular Sports Test



英語翻譯
①She smoothed her down with a wet comb,wiped her muddy shoes,and thought about the three months she had known him.
②She was dying to see him again but what if he didn't want to see her?
③Just 20% more produce will mean the difference between sickness and health,between familiesgoing hungry and families providing for themselves.
④The gift you is not something your loved one keeps but a voluntary contribution towards the lives of people who really need it.


1.她用濕木梳理順了頭髮,擦了擦髒鞋子,回憶著認識他以來的這三個月.
2.她迫不及待的想要再見他一面,可他並不想她的話怎麼辦?
3.僅僅把產量提高20%,就意味著疾病與健康,饑餓與自給自足家庭的差別.
4.你送的禮物不是給你所愛的人留念的,而是給那些的確需要的人生活上的幫助.



英語翻譯
你能在今天睜開眼睛,說明你還活著.
既然我們都闖過了“世界末日”這個坎,還有什麼困難或者挫折過不去呢?
所以
1.乘我們還活著,我們要多做一些自己想做的事情.
不要等到生命即將終結,再去後悔那已逝去的人生.
2.珍惜現在擁有的一切,不要浪費時間,做到“少說話,多做事”.
3.為未來設下一個適當的目標,並朝之好好努力.
只要不拋弃自我,沒誰可以主宰你的世界.
只要不放弃追逐,你的末日不會輕易到來.


Today you can see with your own eyes that means you are still alive and well .In the past we have been through“thick and thin”and even the so called“end of the world”.I don't see any other diffic…



英語翻譯
光澤有著悠久的歷史,自西元979年建縣,距今已1031年.


Guangze has a long history of 1031 years,since its establishment in AD 979.



英語翻譯
隨著近年來中泰兩國人民交流日益加深,對泰國文化的研究也逐漸變成了學術熱點.泰國春武裡府的賽牛節作為一個獨特的地方性習俗,其來源、現狀,以及對當地社會的影響,從另一個側面反映了泰國文化.通過對賽牛節比賽現場進行實地考察,採訪當地居民,以及親身體驗其中一些項目,並且結合原版泰文資料進行研究,筆者發現,賽牛節來源於人們的農業生活,與泰國根深蒂固的佛教信仰息息相關,對當地農業、商業、旅遊業的發展以及社會風氣導向產生了重要的影響.同時,賽牛節還反映當地人的精神寄託,詮釋了泰國社會中行善積德、知恩圖報的佛教思想,賦予了牛在泰國社會的深刻文化內涵.牛有恩於人,人們也通過節日的形式報答牛的恩德,牛在泰國人民心目中有著不可替代的重要地位.


In recent years,the people of China and Thailand exchanges and deepening,the study of Thailand culture has gradually become an academic focus. Thailand Chonburi Fu tournament cattle festival as a unique local customs,its origin,current situation,as well as the influence to the local society,reflected from the other side of the Thailand culture. The ox match game site visits,interviews with local residents,as well as the experience of some of these projects,and the combination of the original Thai data research,author discovery,match cattle Festival originates from people's life with the Thailand agriculture,ingrained Buddhist beliefs are closely related,to the local agricultural,commercial,tourism and society climate orientation has produced important influence. At the same time,match bovine section also reflect local people's spiritual sustenance,interpretation of the Thailand society of good works,gratitude Buddhist thought,give cattle in Thailand society's profound cultural connotation. Niu Youen in person,people also through festival form repay kindness cattle,cattle in Thailand people's mind has the irreplaceable important position.