费用换算法可分为（）和（）两种。
参考答案：年费法；现值法
The two coal miners, _____ in the mine for as long as three days, were eventually rescued and sent to
hospital immediately.[ ]
A. to trap
B. trapping
C. trapped
D. having trapped
鱼糜制品加工的基本原理是什么？
