A. DNA is characteristic of a region B. they are beyond doubt of common ancestry C. DNA strand has the ability to identify individuals D. their unique identification can be provided via DNA 参考答案:B 答案解析:单句理解推断题 题干的意思是对第一句中“there are also regions of the DNA strand(也有一些区域具有同样的DNA线索)”的改写,原因就是前面提到的“becaus