A:y=﹣x
B:y=﹣ 2 (x﹣4)
C:y= 3 (x﹣4)
D:y= 3 (x+4)
成吉思汗的主要功绩是( )
— The summer holiday is on the way. We'll have more freedom.
— . But we should learn to manage ourselves.
有一些长20厘米、宽12厘米、厚6厘米的砖头,要堆成正方体至少需要这样的砖头____块?