—I've heard that another brand of milk powder has been banned.

—It's a shame that some companies lack the sense of social responsibility and______.  [ ]

A. conscience  

B. command  

C. consideration  

D. consequence

出土了目前世界上最早的人工栽培稻标本，有“天下谷源，人间陶本”之称的远古人类遗址是（）

A.城头山遗址

B.高庙遗址

C.玉蟾岩遗址

D.彭头山遗址