题目

About aspirin:Aspirin is a commonly used drug which can be taken to relieve discomfort caused by numerous medical problems including headaches, toothache, inflammation and infections. It is also suitable to treat colds and flu-like symptoms, and to reduce a high temperature.Who can take aspirin?Adults and children over 16 years of age.Who should not take aspirin?Women who are pregnant, or plan to become pregnant. Aspirin may harm your unborn baby.Women who are breast-feeding. Aspirin can pass into your breast milk and may harm your baby.People who have any problems with the way the liver works只给出下列甲和乙中对应的量，不能求出物质的量的是：（    ）          A                  B                           C               D                          甲    物质的粒子数         某条件下气体的摩尔体积 固体的体积 溶液的物质的量浓度 乙   阿伏加德罗常数 该条件下的气体体积     固体的密度 溶液的体积