Documentation of a software package is normally produced for two purposes. One is to explain the (1) ofthe 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 internal composition so that the system can be maintained later in its life cycle. Documentation ofthis type is known as ( 3 )
第1题，共3个问题
(单选题)空白（1）处填（）
A:plans
B:cost
C:features
D:schedules
第2题，共3个问题
(单选题)空白（2）处填（）
A:systemdocu mentation
B:userdocu mentation
C:venderdocu mentation
D:productdocu mentation.
第3题，共3个问题
(单选题)空白（3）处填（）
A:system documentation
B:user documentation
C:vender documentation
D:license documentation
那么这样的岗前培训至少需要 （） 周时间才能满足企业的要求。