工程经济分析一般步骤是()=1\*GB3①确定目标;=2\*GB3②穷举方案;=3\*GB3③寻找关键要素;=4\*GB3④决策;=5\*GB3⑤评价方案
=1\*GB3①=3\*GB3③=2\*GB3②=5\*GB3⑤=4\*GB3④
=2\*GB3②=1\*GB3①=3\*GB3③=4\*GB3④=5\*GB3⑤
=1\*GB3①=3\*GB3③=2\*GB3②=4\*GB3④=5\*GB3⑤
=2\*GB3②=1\*GB3①=3\*GB3③=5\*GB3⑤=4\*GB3④
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