题目

一定物质的量的Cl2与NaOH溶液反应，所得产物中含NaClO和NaClO3的物质的量之比为3:5，则参加反应的Cl2与NaOH的物质的量之比为（       ）   A.8：11        B.3：5      C.1：2      D.9：4                                                                                                                                                   5. The newspaper (报道) the price of food went up last month.