【单选题】. Going on a trip to a far-away destination _________ be expensive and difficult, but it is very interesting.
【单选题】子曰“《关雎》乐而不淫,哀而不伤。”中的“淫”是指( )。
【单选题】共集电极放大器的输入电阻 ,输出电阻 。
【单选题】与共射单管放大电路相比,射极输出器(共集)电路的特点是 ( )。
【单选题】Which structure does NOT pass through the lesser sciatic foramen?
B.
internal pudendal artery and vein