放几个数学狗。。。

xiang5796

15帝都二战可耻的失败了。。。。
M50，基本全是JJ上的原题，稍有变形。下面放几个狗狗上没有的，为3战攒RP。。。

AI：“Responsibility for preserving the natural environment ultimately belongs to each individual person, not to government.”
AA：The following appeared as part of an annual report sent to stockholders by Olympic Foods, a processor of frozen foods.
“Over time, the costs of processing go down because as organizations learn how to do things better, they become more efficient. In color film processing, for example, the cost of a 3-by-5-inch print fell from 50 cents for five-day service in 1970 to 20 cents for one-day service in 1984. The same principle applies to the processing of food. And since Olympic Foods will soon celebrate its twenty-fifth birthday, we can expect that our long experience will enable us to minimize costs and thus maximize profits.”（1）

1,(489)^-1*(-1)^489=?
LZ选：-1/489

2,DS:在一个坐标轴上，给了一个线段上一个end point（终点？）的坐标，问能不能求出另外一个end point。
a,告诉你了中点的坐标
b，告诉你了两点的距离
LZ选：A