题目

afraid work member become still its Chinese understand or interest Now a growing number of young people are wearing traditional hanfu, or Han Chinese clothing. You may see them eating, shopping, travelling1 ． even working in hanfu. Hanfu 2． popular in part because the government is developing traditional culture. Period dramas have also helped develop the public’s interest in traditional3 ． clothes. What hanfu is like is different since each Han-controlled dynasty had4 ． own style, but the clothes are usually loose, with sleeves（袖子） that hang down to the knees and flowing rob在一个密闭容器中有四种物质发生反应，一段时间后测得反应前后各物质质量如下：ABCD反应前质量/g1210515反应后质量/g3228未测若A与D的相对分子质量之比是3：1，则在反应方程式中A与D的化学计量数比为A. 3：1 B. 2：1 C. 3：2 D. 1：2