68 DS 夏天裡七月的sales比六月多X%,八月的sales比七月多Y%請問八月比六月多%? A. X+Y=10 B. (1+X%)(1+Y%)=一个整数
其中,B里是不是X,Y只能去0?
131、15% of all trees planted in the F and not flowered.40 percent of trees planted in the F are flowered.what is the percent of trees planted in the F? a, 55% b,25% 这题我差点选错,一开始选A 后来改为 B