单选题:人工定额中未包括的,而在一般正常施工情况下又不可避免的一些零星用工属于(  )。

题目内容:
人工定额中未包括的,而在一般正常施工情况下又不可避免的一些零星用工属于(  )。 A.基本用工
B.人工幅度差
C.超运距用工
D.辅助用工
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