周围感觉神经存在两类不同直径的神经纤维,一类是____髓鞘的Aδ纤维和____髓鞘C纤维,主要司__________的传递;另一类Aα、Aβ纤维,主要司________传递。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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