The farm as well as its neighboring hills which we once spent so

much time ______ on a new look as recently as last year. [ ]

A. on has taken

B. has taken

C. on having taken

D. having taken

以下症状与维生素A蓄积中毒无关的是（）。

A.长骨变粗及骨关节疼痛

B.皮肤干燥、皮疹

C.易凝血

D.易激动、疲乏

E.肝脾肿大、黄疸