供应甲状腺的动脉主要有()和(),前者起于()动脉,后者起于()。
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根据神经元突起的数目,可将神经元分为()、()和()三类。
A it's quite different from what they saw on the website advertisement ;
B it's quite same to what they saw on the website advertisement ;
C it's easy to lose personal information
神经系统分为中枢部和周围部,中枢部包括()和(),周围部包括()、()和()。