Warning: file_put_contents(): Only 0 of 5016 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 一级黄色录象片,日韩三级久久,国产一级Av片在线观看
A type of conditioning in which the subject must learn to make some response to avoid a noxious or aversive stimulus. 個躰通過學習採取某種反應(yīng)行爲，避開即將到來的打擊過程或厭惡性刺激。 blog.sina.com.cn