急性胰腺炎术后饮食是
A．禁食不禁饮B．低脂饮食C．禁软食D．低脂、低糖流食E．低糖流食
参考答案：C
Three different lumberjacks can chop W amount of wood in 30 minutes, 45 minutes, and 50 minutes according to their different levels of skill with the axe. How much wood, in terms of W, could the two fastest lumberjacks chop in 2 hours ？（）
A.A
B.B
C.C
D.D
E.E
