A:细胞
B:组织
C:器官
D:系统
如图,△ABC中,∠ABC与∠ACB的平分线交于点O,过点O作MN∥BC,分别交AB,AC于点M,N,若AB=12,AC=18,BC=24,则△AMN的周长为( )
以下能说明细胞具有全能性的实验是( )
Juliette's website
Name
1 Girls
Development
At ten, Juliette drew 2 little girls.
She started the website with the help of her 3.
At first, there were only some simple pictures on the website.
Now, it has message boards, chat rooms, 4 , music and more.
Aim(目的)
To help the girls learn more about cultures,5 and become better.
女性个体形成卵细胞时,有些含X染色体,有些含Y染色体.
泥石流灾害频发地区,其气候特征往往是( )