解放军文职招聘考试电脑的巨大作用和学会电脑的益处-解放军文职人员招聘-军队文职考试-红师教育
发布时间：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(侵犯隐私), fraud(欺诈), 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。细节题。根据第 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 为正确答案。2. A。细节题。根据第 3 段 Invasion of privacy, fraud, and computer-related mistakes are just a few shocking examples 可知电脑是不能避免错误的，故 A 为正确答案。3. A。细节题。根据最后一段 The choice is yours, and through a knowledge of computer systems will you be able to avoid the dangers 可知 A 才是所需要的条件。
军队文职岗位能力数量关系：利润问题
利润问题一直是数量关系当中相对简单的一类题型，一般只需要通过方程或者只是简单地计算就可以解决这一类问题。那么对于一些特殊限定条件的利润问题，我们应该如何去解决呢?下面就和专家看一下以下几种题型。一、固定利润问题例题：某电脑销售商销售某品牌的台式机和笔记本电脑。台式机和笔记本电脑的进价分别为每台2000元和3500元，销售价分别为每台3000元和4800元。已知该销售商恰好花费80000元购进了一批该品牌的台式机和笔记本电脑(每种均不少于5台)，则其最大利润是多少元?拿到这样一道题，大多数学生会理所当然的认为，要想有最大利润，就需要让单件利润更高的电脑购买台数更多，所以从单件利润来说，台式机是1000元/台，笔记本电脑是1300元/台，所以比较来看应该多买笔记本电脑。但是题目当中明确规定成本是一定的，笔记本电脑虽然单件利润更高，但单件成本也更高，所以在总成本一定的情况下购买的台数就会相应减少，所以并不一定能达到最高利润，所以这类成本固定的利润问题，想要达到利润最高，需要用到的是利润=成本利润率这个公式，成本固定，利润率越高，利润越大。所以这道题目我们要选择的不是单个利润多的，而是选择利润率高的，而台式机的利润率是(3000-2000)2000=50%，笔记本电脑的利润率则是(4800-3500)350050%，所以应该多买台式机。得出这个结论之后我们再去根据总成本是80000元列方程，得到2000x+3500y=80000，约分得到4x+7y=160，两个未知数一个独立方程，判断是不定方程，未知项系数4与常数项160之间有公约数4，所以利用整除法解决，判定7y能被4整除，进而得到y能被4整除，结合题目当中的x,y5，而y取之又要尽可能小，得出y=8，带回原方程得到x=26，最后计算总利润是261000+81300=36400元。二、数量固定如果上边的题目改为购买的总台数为40台，求解最大利润，那么在数量固定的情况下，我们需要选择的就只是单件利润更高的一类了，因为总利润=数量单件利润，在数量相同的情况下，单件利润越高，总利润就越高。所以更改之后的题目解法就应该是台式机5台(题干信息每种均不少于5台)，利润为51000=5000，笔记本电脑35台，利润为351300=45500，总利润为5000+45500=50500元。通过这两个例题，希望大家对利润问题的解题思路有一定的了解，中公教育祝大家考试顺利。
