以下哪项不属于周围神经系统()
A.前角细胞
B.脊神经根组成的脊神经
C.运动细胞
D.视神经
E.嗅神经
参考答案:B
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Having been married for over 10 years, the couple ____ finally because they quarreled a lot.
A.broke up
B.broke down
C.broke out
D.broke in