题目内容
慢性毒性试验的试验周期是
2021-10-11
A.6个月
B.9个月
C.12个月
D.1〜2年
E.2〜3年
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25431' and id < 2142111 and id<>'2142111' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25431' and id > 2142111 and id<>'2142111' order by id asc limit 5