The criminal was told he would be__________ punishment if he assisted the police.

A．free against

B．immune from

C．aware of

D．at stake

有关原发性肝癌，哪项说法是不正确的

A．原发性肝癌以肝细胞型最多见
B．原发性肝癌以弥漫型最多见
C．原发性肝癌肝内转移发生最早
D．原发性肝癌种植转移较少见
E．原发性肝癌半数以上患者有肝区疼痛