固体废物按其污染特性可分为()。
A.一般废物
B.工业废物
C.农业废物
D.危险废物
参考答案:A, D
She has been in Tianjin for ten years. Tianjin has become her second _________.
A.family
B.house
C.home
D.room
食管静脉曲张典型的X线表现为()、()和管壁边缘呈锯齿状。