322. PS:X,Y公司的full-time workers 书目一样多,Y公司part-time workers is 3 more than twice that of company X(确定是这么表达的),问Y有多少part-time workers 323. Ps:3^41+3^42+3^43=? 13*3^41 324. (x+2y)^2-(x-2y)^2. 8xy 325. 一个pretzel店,有2种口味。一个是Cheese, 一个是 Pepper. 总共有30个Pizza,他们的比例不可能是?我选的是1:7 326. X^5Y<0?也是半个变体 (1)X(Y^3)<0 (2)XY^2>0 |