第19题: [单项选择]下列哪项在梗阻性黄疸的鉴别中意义不大( ) A. 胆管及胰管扩张程度 B. 胆管及胰管扩张平面 C. 胆管形态及管壁厚度 D. 肝脏大小及密度 E. 有无结石和软组织肿块 参考答案:D
第20题: [单项选择]______ every effort has been made to ensure that the details in this brochure are correct, the company cannot accept responsibility for any late changes. A. Even B. While C. Nevertheless D. Whereas 参考答案:B 答案解析:[解析] 此处while引导让步状语从句,表示“尽管,虽然”。