A.23~29℃ B.15~20℃ C.20~25℃ D.25~30℃
A.2,3,7,8--TCDD B.1,2,3,7,8--P5CDD C.1,2,3,4,6,7,8,9--OCDD D.1,2,3,4,7,8--H6CDD
A.30° B.120° C.270° D.360°