---Why does Tom’s mother ask him to drink milk?

---She says it’s         drink., and it’s good for his          .

A．health; healthy

B．healthy ;healthy

C．health; health

D．healthy; health

右表为小明家中电热水器的部分技术数据。该电热水器正常工作时的功率为__________瓦，电流为__________安。若它单独正常工作2小时，则家中电能表的示数变化__________千瓦·时。