题目内容
呼吸性粉尘是指粒子直径多大的粉尘
2022-01-04
A.<15um
B.<10um
C.<5um
D.<2.5um
E.<0.1um
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='30566' and id < 2466889 and id<>'2466889' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30566' and id > 2466889 and id<>'2466889' order by id asc limit 5