American women usually identify their best friends as someone _______ they can talk frequently.
____，帘卷西风，人比黄花瘦。
自然界生物具有繁殖的生命特征，正因为如此，才彰显了多姿多彩、欣欣向荣的生命现象．下面是有关人类及不同动物的生殖发育情况，请分析回答：
