某单元中有甲、乙两种物质，甲种物质的临界量和实际量分别为5 t和2.5 t，乙种物质的临界量和实际量分别为2 t和1.5 t，则该单元不属于重大危险源。(...

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问题某单元中有甲、乙两种物质，甲种物质的临界量和实际量分别为5 t和2.5 t，乙种物质的临界量和实际量分别为2 t和1.5 t，则该单元不属于重大危险源。( )

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