—I'm afraid these flowers won't be able to live through the winter.

—But I think otherwise. You see， measures　　　　to take good care of them.

A．have taken

B．had been taken

C．will take

D．are being taken

甲胎蛋白是下列哪一种肿瘤的最灵敏、最特异的指标

A．胃癌

B．肝癌

C．卵巢癌

D．直肠癌

E．甲状腺肿瘤