下列哪种不是实现脂质体靶向性的机制
A．血流动力学B．巨噬细胞吞噬C．病变组织通透性D．配体识别E．病变组织对脂质体的亲和性
参考答案：D
No sooner ________ at the airport than she was surrounded by the reporters.
A．had the star arrived
B．the star had arrived
C．has the star arrived
D．the star has arrived
胆囊癌的CT表现分四型，下列哪型是错误的()
A.结节型
B.壁厚型
C.肿块型
D.阻塞型
E.结石型
