填列年末资产负债表中“未分配利润”项目的依据是（ ）

A．“盈余公积”账户余额

B．“本年利润”账户余额

C．“应付利润”账户余额

D．“利润分配——未分配利润”账户余额

Documentation of a software package is normally produced for two purposes.One is to explain the(1)of the software and describe how to use them.This is known as (2)because it is designed to be read by the user of the software.The other purpose of documentation is to describe the software's intemal composition so that thesystem can be maintained later in its life cycle.Documentation of this type is known as(3)

空白（1）为（）

A.plans

B.cost

C.features

D.schedules