通信企业业务在营销过程中发生的各项费用是指()。
A.营业费用
B.管理费用
C.业务费用
D.财务费用
参考答案：C
应用角色
A snag or other underwater obstruction may form a（）.
A.V-shaped ripple with the point of the V pointing upstream
B.V-shaped ripple with the point of the V pointing downstream
C.small patch of smooth water on a windy day
D.smoothing out of the vessel's wake
