腹泻病的治疗原则是______、______、______、______。
参考答案:预防和纠正脱水‖继续饮食‖合理用药‖加强护理
His parents were worried that he too much time chatting on line.
A.spent
B.cost
C.paid
D.had
改变非磁性垫片的厚度可调整电磁式继电器的()。
A、释放电压(或电流)
B、吸合电压(或吸合电流)
C、A、B都能
D、A、B都不能