[名词解释] 必需脂肪酸

膳食纤维 肺静脉高压诊断的重要指征是() ["A．间隔线出现","B．上肺静脉扩张","C．胸腔少量积液","D．钙化灶","E．含铁血黄素沉着"] 维生素 纵隔肿瘤定位诊断最佳方法是() ["A．胸部正侧位片","B．体层","C．血管造影","D．支气管造影","E．CT"] 低盐膳食低渣膳食 ["A．心力衰竭","B．脑栓塞","C．贫血","D．糖尿病","E．肠炎下列膳食适合哪些疾病"] 必需脂肪酸