解:原式=﹣1﹣27+4
=﹣24.
一 Could you tell me you will come back?
— In ten minutes.
能卷舌(基因组成为AA)的父亲与不能卷的舌(基因组成为aa)的母亲将基因传递给子代的过程如图所示.请分析回答:
一个圆柱和一个圆锥底面积比为2:3,体积比为5:6,求高的比.
– How old is your sister?
– She is ________ girl.