脾肿大最常见于的病变是 ["A．炎症","B．寄生虫","C．肿瘤","D．白血病","E．门脉高压"]
不对称合成（asymmetrical synthesis）
脾脏良性肿瘤最为常见的是 ["A．血管瘤","B．纤维瘤","C．血管内皮细胞瘤","D．囊肿","E．错构瘤"]
中年男性，上腹隐痛四月余就诊。CT示胰头肿大，密度尚均匀，肝内外胆管无明显扩张，半年后随访，病灶无明显变化。应首先考虑 ["A．胆总管结石","B．胰头癌","C．胰头炎症","D．胆管炎","E．十二指肠憩室炎"]
下列急性胰腺炎CT检查的表现，错误的是 ["A．胰腺弥漫性肿大","B．胰腺假性囊肿形成","C．胰腺轮廓不清","D．胰内、胰周出现边缘不清的低密度区","E．肾前筋膜增厚"]
表面活性剂（surfactant）
