与5-氟尿嘧啶叙述不相符的是
A．前体药物
B．体内代谢产物具有活性
C．可透过血脑脊液屏障
D．属于嘧啶拮抗物
E．毒性小，无骨髓抑制作用
参考答案：E
收集下肢、盆部及腹腔淋巴的是（）
A.左、右支气管纵隔干
B.肠干
C.左、右颈干
D.左、右腰干
E.左、右锁骨下干
— Would you like to tell me ?
— Sure. Practice makes perfect.
A．how can I study English well
B．why do you learn English well
C．how I can study English well
D．why I learn English well
