成本是信息系统生命周期内各阶段的所有投入之和，按照成本性态分类，可以分为固定成本、变动成本和混合成本。其中（ ）属于固定成本，（ ）属于变动成本。
问题1选项
A.固定资产折旧费
B.直接材料费
C.产品包装费
D.开发奖金
问题2选项
A.员工培训费
B.房屋租金
C.技术开发经费
D.外包费用
正确答案及解析
正确答案
解析
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