如果仪器设备的工作电压不详，能否使用？（ )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30404' and id < 2457946 and id<>'2457946' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30404' and id > 2457946 and id<>'2457946' order by id asc limit 5