A．The books were sent out late.

B．The books were sent to the wrong place.

C．He didn’’t mind helping the woman move.

D．He doesn’’t know the woman’’s new address.

制定节水强制性标准，逐步实行用水产品用水效率（）。

A、标识管理

B、强制管理

C、有效管理

D、统一管理