—Could you tell me how to get to the town hall?

—________. Maybe you could ask the policeman over there.

A．A piece of cake

B．That depends

C．I don't care

D．I don't know for sure

下列有关细胞生命历程的叙述，正确的是[ ]

A．细胞凋亡对于维持多细胞生物体内部环境的稳定有重要作用

B．生物体内，分化的细胞无法继续增殖

C．有丝分裂过程中，细胞不会发生可遗传的变异

D．减数分裂过程中，细胞中的遗传物质平均分配至子细胞