神经纤维断裂后远侧段发生的一系列变化()
A.神经元变性
B.沃勒变性
C.轴突变性
D.节段性脱髓鞘
E.神经断裂
参考答案:B
同步发电机的纵差保护是反映()。
A、转子一点接地;
B、定子绕组及引出线相间故障;
C、转子两点接地
A check line is().
A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge