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. （ ）

单项选择题 无论采用周向磁化还是纵向磁化检查车轴裂纹，都可采用（ ）电源 A、交流 B、直流 C、交流或直流