[名词解释] 细胞凋亡

何谓血沉?试述引起血沉加快的常见原因。 肺肾综合征的X线表现为() ["A．多发结节状","B．小叶斑片状","C．大片融合状","D．纤维条索状","E．多发空洞状"] 血压 弥漫性肺间质纤维化常见于下列哪些疾病() ["A．肺类风湿病","B．系统性红斑狼疮","C．皮肌炎","D．系统性硬皮病","E．风湿性肺炎"] 隐性黄疸 细胞凋亡