—All the villagers _____the fight against the big flood, _____young and old, men and women.

— It’s really very brave of them to do so.

A．joined; including

B．joined in; included

C．joined in; including

D．joined; included

单管多层分质分压注聚合物管柱技术中井下工作筒的长度（）普通偏心管柱。

A、大于

B、小于

C、大于等于

D、小于等于