※ 引述《minusthree (minus3)》之铭言： : 1. a ,b are non-negative integrate : column A : (a + b)^◇ column B: a + b^◇ : ans : c 不知道◇ 是啥鬼... 不会 = =+ : 2. x= 4y and x≠0 , : column A : the percent of x+y that x present column B: 75% : ans:b 这题我有点问题... column A : 是问说x在x+y里面所占的比率吧? 那应该是 x/(x+y) = 4y/(4y+y) = 4/5 = 80% 应该A比较大吧? 还是我理解有错?? : 3. The volume of a cube is 64 , : column A : the area of the base of the cube column B: 32 : ans:b A: 边长4 面积16 <B : 4. the price of a certain hardback book is 3 times the price of : the paperback edition of the same book. At a sale, the number if : hardback books sold was 5 times the number of paperback editions : sold. If a total of $ 600 was collected from the sale of this book, : how much was collected from the sale of the paperback edition? : a) $ 37.5 b) $ 40.00 c) $66.67 d) $75.00 e) $ 360.0 : ans: e : 我一直算出来 A 不知道是不是我题目意思理解错了 : 希望有高手可以也解释一下题目的意思^^a hardback book的价格 是 paperback edition 的三倍 在一次贩卖中 hardback book卖的量是paperback edition 的五倍 贩卖所得600 问paperback edition共卖了多少钱?? 价格设为 3T, T 量各卖了 5X, X 5X*3T+X*T=600 16XT=600 XT=37.5 我跟你算一样 ^^ : 5. a couple sold their home 5 months before the annual coverage on : their homeowner’s policy expired. If the company’s policy is to : return 1/12 of the yearly premium for each month the policy is not : used and their premium was $168 a year, how much of their payment would : the insurance company return to them? : a) $65 b) $70 c) $75 d) $93 e) $ 98 : ans: c : 我算出来是bㄟ.....T_T 168*(5/12)= 70 我也一样?? : 6. a grocer has 400 pounds of coffee in stock, 20 percent of which : is decaffeinated. If the grocer buys another 100 pounds of coffee : of which 60 percent is decaffeinated,what percent , : by weight , of the grocer’s stock of coffee is decaffeinated? : a) 28% b) 30% c) 32% d)34% e) 40% : ans: d 原先400, 里面80是低卡 後来100, 里面60是低卡 所以 (80+60)/(400+100)= 28% 答案错?? : 7. 一个@,2个 $, 2个 #, 组成一个5位元的密码 : column a: 总排列数 columnb: 30 : ans: c 总排列数=5!/(2*2)=5*3*2*1=30 有两种重复 有错请指正 ^^ : ================================================== : 我问了好多.....|||||先谢谢各位高手帮忙 麻烦大家了 : 倒数几天就要考试了......还是一点自信都没有T_T -- 阿祥：『如果我不变回以前的韦吉祥，我救不了我自己！！』　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Andy,龙在江湖 --

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