多选题:对于业主而言,采用单价合同的不足之处是(  )。

题目内容:
对于业主而言,采用单价合同的不足之处是(  )。 A.承担工程量变化的风险
B.不利于工程质量控制
C.不利于投资控制
D.不利于进度控制
E.协调工作量大

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