解放軍文職招聘考試電腦的巨大作用和學(xué)會電腦的益處-解放軍文職人員招聘-軍隊文職考試-紅師教育
發(fā)布時間：2017-06-29 22:29:59Can you remember the first time you learned to ride a bike or drive a car? Learning these skills changed your life forever and opened up new horizons. Learning about computers can be like learning how to ride a bike or drive a car. Once you have invested the time to master the skills, you will never go back to the old days. The new technology is simply too convenient and too powerful.Technological developments through the years have enabled us to do more with less effort. We have continuously looked for better ways of doing things. Each invention and new development has allowed us to extend our capabilities. Today we see one of the most dramatic technologies ever developed the computer. It extends the capabilities of our minds.Computers have saved organizations millions of dollars. Furthermore, these same computer systems have opened up new opportunities that would have gone undiscovered or neglected. The computer may multiply what we can do, and the return on investment is high. The growth of computer usage is surprising. On the other hand, the computer can do serious damage. Invasion of privacy(侵犯隱私), fraud(欺詐), and computer-related mistakes are just a few shocking examples.The computer is like a double-edged sword. It has the ability to cut us free from some activities, but it can also cut deep into profits, personal privacy, and our society in general. How it is used is not a function of technology. It is strictly a function of how people decide to use or misuse this new technology. The choice is yours, and only through a knowledge of computer systems will you be able to avoid the dangers while enjoying the many, many benefits of the computer age.1. The writer thinks learning about computers is like learning how to ride a bike or drive a car because _______.A. it is simple and practicalB. it needs a lot of practiceC. it leads people to new life experiencesD. it takes much time to master the skills2. According to the passage, computers bring people the following benefits except _______.A. avoiding mistakes B. saving moneyC. making money D. opening up opportunities3. According to the writer, the bad effects of computers can be avoided if we _______.A. have sound knowledge of computer systemsB. tell people not to misuse computersC. have strict rules over the use of computersD. make more investments in the technology4. This passage is probably written for _______.A. computers B. computer producersC. computer learners D. computer programmers1. C。細節(jié)題。根據(jù)第 1 段 Learning these skills changed your life forever and opened up new horizons. Learning about computers can be like learning how to rid a bike or drive a car 可知 C 為正確答案。2. A。細節(jié)題。根據(jù)第 3 段 Invasion of privacy, fraud, and computer-related mistakes are just a few shocking examples 可知電腦是不能避免錯誤的，故 A 為正確答案。3. A。細節(jié)題。根據(jù)最后一段 The choice is yours, and through a knowledge of computer systems will you be able to avoid the dangers 可知 A 才是所需要的條件。
軍隊文職崗位能力數(shù)量關(guān)系：利潤問題
利潤問題一直是數(shù)量關(guān)系當(dāng)中相對簡單的一類題型，一般只需要通過方程或者只是簡單地計算就可以解決這一類問題。那么對于一些特殊限定條件的利潤問題，我們應(yīng)該如何去解決呢?下面就和專家看一下以下幾種題型。一、固定利潤問題例題：某電腦銷售商銷售某品牌的臺式機和筆記本電腦。臺式機和筆記本電腦的進價分別為每臺2000元和3500元，銷售價分別為每臺3000元和4800元。已知該銷售商恰好花費80000元購進了一批該品牌的臺式機和筆記本電腦(每種均不少于5臺)，則其最大利潤是多少元?拿到這樣一道題，大多數(shù)學(xué)生會理所當(dāng)然的認為，要想有最大利潤，就需要讓單件利潤更高的電腦購買臺數(shù)更多，所以從單件利潤來說，臺式機是1000元/臺，筆記本電腦是1300元/臺，所以比較來看應(yīng)該多買筆記本電腦。但是題目當(dāng)中明確規(guī)定成本是一定的，筆記本電腦雖然單件利潤更高，但單件成本也更高，所以在總成本一定的情況下購買的臺數(shù)就會相應(yīng)減少，所以并不一定能達到最高利潤，所以這類成本固定的利潤問題，想要達到利潤最高，需要用到的是利潤=成本利潤率這個公式，成本固定，利潤率越高，利潤越大。所以這道題目我們要選擇的不是單個利潤多的，而是選擇利潤率高的，而臺式機的利潤率是(3000-2000)2000=50%，筆記本電腦的利潤率則是(4800-3500)350050%，所以應(yīng)該多買臺式機。得出這個結(jié)論之后我們再去根據(jù)總成本是80000元列方程，得到2000x+3500y=80000，約分得到4x+7y=160，兩個未知數(shù)一個獨立方程，判斷是不定方程，未知項系數(shù)4與常數(shù)項160之間有公約數(shù)4，所以利用整除法解決，判定7y能被4整除，進而得到y(tǒng)能被4整除，結(jié)合題目當(dāng)中的x,y5，而y取之又要盡可能小，得出y=8，帶回原方程得到x=26，最后計算總利潤是261000+81300=36400元。二、數(shù)量固定如果上邊的題目改為購買的總臺數(shù)為40臺，求解最大利潤，那么在數(shù)量固定的情況下，我們需要選擇的就只是單件利潤更高的一類了，因為總利潤=數(shù)量單件利潤，在數(shù)量相同的情況下，單件利潤越高，總利潤就越高。所以更改之后的題目解法就應(yīng)該是臺式機5臺(題干信息每種均不少于5臺)，利潤為51000=5000，筆記本電腦35臺，利潤為351300=45500，總利潤為5000+45500=50500元。通過這兩個例題，希望大家對利潤問題的解題思路有一定的了解，中公教育祝大家考試順利。
