下列哪项为无性生殖和有性生殖的最大区别（ ）
A．是否产生生殖细胞
B．是否需要两性生殖细胞的结合
C．是否由母体直接产生新个体
D．能否繁殖新个体
答案：A
Though he killed a boy, he was________to 20 years' imprisonment instead of death because of his
good attitude and active help in breaking the case. [ ]
A. sentenced
B. reported
C. given
D. attacked
孕期监护包括对 _________ 和 _________ 。
