预防全身麻醉患者术中发生误吸的主要术前准备措施是（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30902' and id < 2486156 and id<>'2486156' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30902' and id > 2486156 and id<>'2486156' order by id asc limit 5