A:神经系统
B:消化系统
C:循环系统
D:免疫系统
判断正误。
I like Chinese music. I don't like pop music. Because I think pop music is not quiet. I can play the zither. My sister can play the zither, too . But she's better than me. We can play the erhu. I am better than my sister.
读图,完成下面小题
基因分离定律的实质是( )