答案：C
This suitcase is _________ heavy _________ carry.[ ]
A. too, to
B. to, too
C. and, or
胎先露下降程度的标志是
A．以坐骨结节为标志B．以坐骨棘为标志C．以入口平面为标志D．以出口平面为标志E．以中骨盆平面为标志
