一定量的CuS和Cu2S的混合物投入足量的HNO3中，收集到气体VL（标准状况），向反应后的溶液中(存在Cu2＋和(SO4)2－)加入足量NaOH，产生蓝色沉淀，过滤，洗涤，灼烧，得到CuO12.0g，若上述气体为NO和NO2的混合物，且体积比为1：1，则v可能为( )
| A．9.0L | B．13.5L | C．10.7L | D．16.8L |
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