Objective: to observe the ultrastructure and synaptic number of cerebral regions related to psychological dependence in rats with different morphine dependent time.
目的：观察不同时程吗啡依赖大鼠心理依赖相关脑区超微结构和突触数量的变化。
Objective: to observe the ultrastructure and synaptic number of cerebral regions related to psychological dependence in rats with different morphine dependent time.
目的：观察不同时程吗啡依赖大鼠心理依赖相关脑区超微结构和突触数量的变化。
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