Most boys __________ guns to dolls  while most girls __________ have dolls than guns.

A．would rather; prefer

B．prefer; would rather

C．would rather; would rather

D．prefer; prefer

恶性肿瘤时伴随肿瘤抗原升高的蛋白质是（）。

A.铁蛋白

B.转铁蛋白

C.糖蛋白

D.脂蛋白

E.载脂蛋白