[名词解释] 滑动摩擦力

急性粟粒性肺结核的特征是() ["A．多由肺或肺外干酪样病灶破溃到血管引起","B．常无全身中毒症状","C．常可并发结核性脑膜炎","D．肺内病灶细小如粟粒，均匀分布于两肺野","E．起病急，有全身中毒症状"] 平衡杠杆 滚动摩擦力 转院 肺部空洞性病变，常见于哪些疾病() ["A．肺结核","B．慢性肺脓肿","C．肺癌","D．支气管炎","E．肺气肿"] 滑动摩擦力