标题: 12.6 1站770 放狗 [打印本页] 作者: grc0110 时间: 2014-12-7 09:19 标题: 12.6 1站770 放狗 1. 8x - 4y - 5z = 3, x, y z are all positive (but not necessarily integers). What is x?
(1) 4y is integer
(2) 5z is integer
2. 两个数和是s, 差是2,求(读懂这句是关键)which is the greater of the numbers? 这俩数里哪个大?
答案 s/2 + 1
19. 农药染色,说是染了色顾客不愿意,所以用了一种白色的粉末,但是白色的粉末又会不容易和食物 (foodstuff)区分,所以这个厂家打算用一种蓝色的染色剂。问的似乎是为了达到目的(目的有两个1) 顾客满意 and 2) 容易区分无risk )weaken或者assumption,差不多的。我选的是whether the dye will leave a trace of blue in the foodstuff.