本实验采用明暗箱被动回避反应和穿梭箱条件性回避反应测定，探讨了铅对大鼠学习与记忆的损害作用。
The impairment of learning and memory of lead exposed rats was evaluated by examining the passive avoidance response and conditioned avoidance response.
实验结果显示，对照组和假CPB组大鼠仅分别实验3.25次和3.72次，电击回避反应即达到学会标准。
The results showed: contrast group and sham CPB group were only tested for 3.25 times and 3.72 times respectively to learn avoiding electric shocks;
实验结果显示，对照组和假CPB组大鼠仅分别实验3.25次和3.72次，电击回避反应即达到学会标准。
The results showed: contrast group and sham CPB group were only tested for 3.25 times and 3.72 times respectively to learn avoiding electric shocks;
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