下列生物的性状中,不是相对性状的是
A:豌豆的高茎和矮茎
B:玉米的白粒与黄粒
C:兔的长毛与黑毛
D:人的双眼皮和单眼皮
— Though he got up early, he missed the school bus again.
一 Why was that?
培养自立能力最基本的就是( )