根据传导速度和后电位差异，将神经纤维分为
A．A类B．B类C．C类D．A、B、C三类E．Ⅰ、Ⅱ、Ⅲ、Ⅵ四类
参考答案：D
Changyu building, _____ a history of more than 700 years, is well-known for its magnificent appearance the quiet and natural surroundings.
A．having; in
B．with; against
C．with; for
D．has; against
船舶碰撞后的损害程度取决于：（）.Ⅰ.两船相对运动速度和碰撞角度Ⅱ.碰撞海域海流速度的大小Ⅲ.碰撞位置和破损的大小Ⅳ.碰撞船舶的吨位大小
A.Ⅰ～Ⅳ
B.Ⅰ、Ⅲ、Ⅳ
C.Ⅱ～Ⅳ
D.Ⅰ、Ⅱ、Ⅳ
