ya ... right answer is ! U8 b0 i+ C5 q$ i2 G
a)$60-$55=賺左$5
- d# P' d2 [! L8 S5 [3 b$ @* Ftvb now,tvbnow,bttvbos.tvboxnow.com- c S" o- w1 N* m
b)$60-$62=花多左$2
/ [) u+ ]! M9 d1 y0 b7 utvb now,tvbnow,bttvb
% s4 } {/ H* f2 Ltvb now,tvbnow,bttvbc)$68-$62=賺左$6os.tvboxnow.com5 C0 `/ x- [* }
6 ]2 T& B/ a! ytvb now,tvbnow,bttvb所以:$5-$2+$6=$9 |