下列药物中成瘾性最小的是
A．美沙酮
B．哌替啶
C．芬太尼
D．可待因
E．镇痛新
参考答案：E
—I didn't find the way to the station.
— ______ I told you about it in detail. [ ]
A. How come?
B. So what?
C. No problem.
D. Who cares?
丢勒的艺术特点？
