题目内容
黏膜表面起抗感染作用的抗体是（ ）
2021-10-08
A.IgM
B.IgA
C.IgG
D.slgA
E.IgD
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25027' and id < 2130953 and id<>'2130953' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25027' and id > 2130953 and id<>'2130953' order by id asc limit 5