题目内容
大鼠致畸试验中,给母鼠染毒的时间为
2021-10-11
A.孕0〜5天
B.孕5〜10天
C.孕6〜15天
D.孕16〜20天
E.孕0〜20天
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25431' and id < 2142135 and id<>'2142135' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25431' and id > 2142135 and id<>'2142135' order by id asc limit 5