下列操作不能用于检验的是 A．气体使湿润的酚酞试纸变红

下列操作不能用于检验的是

A．气体使湿润的酚酞试纸变红 B．气体能使湿润的红色石蕊试纸变蓝

C．气体与浓H₂SO₄靠近 D．气体与浓盐酸产生白烟

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下列操作不能用于检验的是 A．气体使湿润的酚酞试纸变红

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