对于中骨盆平面下列哪项是不恰当的（）
A.前方为耻骨联合下缘
B.为横椭圆形
C.为骨盆最 * * 面
D.两侧为坐骨棘
E.后方为骶骨下端
参考答案：B
Navtex transmitter identification character（）is used to identify the broadcasts which are to be accepted by the receiver and those are to be rejected.
A.B2
B.B1
C.MAR
D.NNN
