A. the discovery of fingerprinting by Jeffery B. the practice of fingerprinting in court C. the fingerprinting in the present situation D. the merits and demerits of fingerprinting 参考答案:D 答案解析:文章主旨题。这一题涉及到整篇文章的大体内容,A,B,C三个选项的内容在文中都有涉及,但是文章的主旨并不在于单单说明这几点。我们从后面的文章中可以看到,DNA指纹的发现既有它的好处也有它的坏处,因此,答