小脑扁桃体位置变异较大,可突入枕骨大孔,但不超过以下()
A.1mm
B.2mm
C.3mm
D.4mm
E.5mm
参考答案:C
Because everyone knows, facts speak louder than words.
A.Since
B.That
C.It
D.As
磁粉探伤主要用于焊后焊接接头及道岔钢轨表面及近表面()检查。