http://ahjyjj.ahedu.gov.cn/show.asp?id=349答案:1-10 CBDAC DBDAA
11-20 CDBCD CADCA
21-30 BDCBA DACBD
31-40 ABCD ABCD ABC ABC ABD ABD ABC AB ACD ABCD
41-50 ABD ABCD ABCD AD AC ABCD BCD AD ABCD ABCD
51-60 ABD ACD ACD AB ABCD BD BC ABCD ACD ACD
61-70 √√√×× ×√√×√
71-80 √√×√√ √√√√√