根据罗马斗兽场的规定，受伤斗士的生死由以下哪一位决定：（）
A、斗兽场主人
B、斗兽场观众
C、斗士自己
D、该地行政长官
参考答案：B
慢粒白血病最常见治疗药物是（）
A.羟基脲
B.环磷酰胺
C.6-MP
D.MTX
E.氮芥
Harry started a 6-mile hike with a full 10-cup canteen of water and finished the hike in 2 hours with 1 cup of water remaining in the canteen. If the canteen leaked at the rate of 1 cup per hour and Harry drank 3 cups of water during the last mile, how many cups did he drink per mil during the first 5 miles of the hike ？（）
A.A
B.B
C.C
D.D
E.E
