一些外源化学物经生物转化其毒性被增强的现象被称为()
A.代谢解毒
B.代谢活化
C.代谢转化
D.代谢增毒
参考答案:B
John, who is seventeen this year, usually eats ____ his father does. No wonder he is growing taller. [ ]
A. twice more than as much as
B. more than twice as much as
C. twice as much as more than
D. twice as more than much as
下述哪种睾丸肿瘤属于非生殖细胞肿瘤()
A.胚胎癌
B.绒毛膜上皮癌
C.恶性畸胎瘤
D.精原细胞肿瘤
E.间质细胞肿瘤