题目

下列关于氯水的叙述中，正确的是   A．新制的氯水盛放在棕色瓶中，放置于阴凉处B．新制的氯水中含有氯气分子，氯分子可以杀菌、消毒C．光照氯水有气泡逸出，该气体是Cl2     D．氯水放置数天后酸性减弱 答案：A5、——May I speak to John? ——Sorry, he         Japan．But he                  in two days． A．has been to; will come back                  B．has gone to; will be back C．has been in; would come back                D．has gone to; won’t come back