A. 发展战略 B. 密集型战略 C. 转向战略 D. 集中化战略
A. 30cal/(kg·,20~40ml/(kg· B. 40cal/(kg·,40~60ml/(kg· C. 50cal/(kg·,60~80ml/(kg· D. 60cal/(kg·,90~100ml/(kg· E. 70cal/(kg·,100~120ml/(kg·