Late in the afternoon, they arrived at ______ small village ______ north of the West Hill.

A．the, the

B．a, \

C．a, the

D．the, \

关于栓塞材料明胶海绵的描述，错误的是（）

A.属基质海绵

B.能被组织吸收

C.用一般的血管造影导管即可快速注射

D.属短期栓塞材料

E.摩擦系数低