[名词解释] 空燃比

脑脓肿形成期增强扫描脓肿壁明显强化具有以下特点，除了 ["A．完整","B．光滑","C．壁薄","D．壁厚","E．均匀"] “富”燃料 化学计量空燃比 脑转移瘤好发于 ["A．大脑皮层","B．小脑皮层","C．大、小脑皮层","D．脑髓质","E．皮髓质交界区"] 一次污染物 空燃比