某无色气体，可能含HCl、CO2、HI中的一种或两种，将其通入氯水中，得到无色透明溶液。加入硝酸酸化的AgNO3溶液，有白色沉淀生成。对于原无色气体推断一定正确的是
| A．一定存在HCl | B．一定存在CO2 |
| C．肯定没有HI | D．不能肯定是否含有HI |
相关试题
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