Play, often seen as _____ activity for kids, is still important in _____ development of teenagers. [ ]

A. the; the

B. an; the

C. an; 不填

D. the; 不填

企业以各种方式筹集所需资金用于生产经营活动的一种战略为()

A.资本积聚战略

B.负债经营战略

C.合资或合作经营战略

D.股份经营战略