【单选题】当同步发电机外部短路时,当短路电流为 倍发电机额定电流,过流脱扣器瞬时动作跳闸。
【单选题】下列有关人体内环境稳态的叙述,错误的是 [ ]
A.
有3种以上的生理系统参与维持人体内环境的稳态
【判断题】“古庙幽沉,仪容俨雅,枯木寒鸦几夕阳”一句,由自然物象的易衰易变,反衬出古庙之依然不改,世事自有公道,忠臣孝子虽死犹荣。
【单选题】有关人体内环境稳态的叙述,错误的是 [ ]
【判断题】Max is sleeping now.
【单选题】有关人体内环境稳态的叙述,错误的是 [ ]
【单选题】Don't talk with each other. The baby___. A. was sleeping B. is sleepping C. was sleepping D. is sleeping