【单选题】TE 波,即横电波,是指( ) 。 A.无纵向电磁场分量的电磁波 B.凡是磁场矢量既有横向分量又有纵向分量,而电场矢量只有横向分量的波 C.凡其电场矢量除有横向分量外还有纵向分量,而磁场矢量只有横向分量的波 D.凡其电场矢量有纵向分量,而磁场矢量只有横向分量的波
【单选题】患维生素D缺乏性佝偻病的婴儿出现颅骨软化的时间是
【单选题】The performance of a medium length transmission lines depends on which of the following?
A.
Resistance and Capacitance only
B.
Resistance and Inductance only
C.
Inductance and Capacitance only
D.
Resistance, Inductance and Capacitance
【单选题】患儿,1岁。睡眠时哭闹不安、多汗,下肢弯曲呈“O”形腿,诊断为维生素D缺乏性佝偻病。对患儿最佳的护理是
【单选题】The performance of short transmission lines depends on which of the following parameters?
A.
Resistance and Capacitance
B.
Resistance and Inductance
C.
Inductance and Capacitance
D.
Resistance, Inductance and Capacitance
【单选题】患儿1岁,因维生素D摄入不足,导致维生素D缺乏性佝偻病,收治入院。