Rose received a letter full of love from her parents on her ______ birthday.
A:sixteen
B:sixteen's
C:sixteenth
D:sixteenths
下图是羊和长颈鹿的自我认识,请运用你所学的知识回答以下问题。
利用电压表与电流表测电阻的方法叫做“伏安法”,如图所示,“伏安法”测电阻R的电路图应该是( )