【判断题】因为构件是变形固体,在研究构件的平衡时,应按变形后的尺寸计算。
【判断题】叠加定理只能计算电压和电流,对功率不能进行叠加。
【判断题】叠加定理只能对电流和电压进行叠加,而不能对功率叠加 。
【单选题】Mr. Ford loved his son, but he was afraid that the boy ’ s interest in machines would make him with a farmer ’ s life.
【单选题】指出下列哪个 不属 确定药物剂量的依据 ( )