A:甲图中共有5种核苷酸
B:乙图所示的化合物中不含糖类物质
C:组成丙物质的单糖是脱氧核糖或核糖
D:在人的体细胞内检测到的化合物丁很可能是蔗糖
—I hear that Tom's sister is a teacher here. —Yes, the girl is standing under the tree is his sister.