A．northernB．westernC．easternD．southern

England occupies the ______ portion of the U.KA．northernB．easternC．southernD．western

基因诊断常用方法有A.RFLPB.PCRC.Southern印迹法D.Western印迹法

用来鉴定RNA的技术是A Northern印迹杂交 B亲和层析 C Southern印迹杂交 D

用来鉴定DNA的技术是A Northern印迹杂交 B亲和层析 C Southern印迹杂交 D

用来鉴定RNA的技术是（　　）A.Northern印迹杂交B.亲和层析C.Southern印迹杂交

用来鉴定蛋白质的技术是（　　）A.Northern印迹杂交B.亲和层析C.Southern印迹杂交