多项选择题 适应的方向有：A. 消极的适应B. 积极的适应C. 自身的改变D. 环境的改变

单项选择题 What pathological change is found in this figure? A、Healing by the first intention B、Delayed wound healing C、Wound dehiscence D、Keloid formation

单项选择题 In 1982, American scientist John Joseph Hopfield put forward a kind of feedback neural network "Hopfield neural network" in his paper Neural Networks and Physical Systems with Emergent Collective Computational Abilities. （ ）