There was a collision (冲突) in the waters off the Diaoyu Islands, _____ have been Chinese territory (领土)

since ancient times. [ ]

A. what

B. where

C. that

D. which

高钠血症常见于（）

A.尿崩症

B.醛固酮增多症

C.肾上腺皮质功能减退症

D.营养不良

E.肺结核