某工程由支模板、绑纲筋、浇筑混凝土3个分项工程组成,流水节拍依次为6天、4天和2天,组织成倍节拍流水施工,则其工期为( ) 天。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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