The biggest whale is _____ blue whale, which grows to be about 29 meters long-the height

of _____ 9-story building. [ ]

A. the; the

B. a; a

C. the; a

D. a; the

对自身抗体进行进一步的抗原特异性区分时，可选择的检测法有（）

A.ELISA

B.Western Blot

C.对流免疫电泳

D.免疫双向扩散法

E.RIA