皮皮学，免费搜题
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【多选题】
下列各项中，属于施工企业工程成本的成本项目的有（ ）。A.
人工费
B.
材料费
C.
期间费
D.
机械使用费
E.
间接费用
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【多选题】以下关于公共卫生间、浴室通风的描述,正确的有:
A.
公共卫生间和浴室应设机械排风系统
B.
排风量应大于补风量，保证卫生间或浴室相对于其他区域维持一定负压
C.
公共浴室必须设置气窗
D.
机械排风量按换气次数确定。
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