● Documentation of a software package is normally produced for two purposes. One
● Documentation of a software package is normally produced for two purposes. One is to explain the __(71)__ of the software and describe how to use them. This is known as __(72)__ because it is designed to be read by the user of the software. The other purpose of documentation is to describe the software，s internal composition so that the system can be maintained later in its life cycle. Documentation of this type is known as __(73)__.
（71）
A．plans
B．cost
C．features
D．schedules
（72）
A．system documentation
B．user documentation
C．vender documentation
D．product documentation
（73）
A．system documentation
B．user documentation
C．vender documentation
D．license documentation
正确答案：C,B,A
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