某人患急性哮喘，皮下给予肾上腺素。肾 上腺素是通过如下何种受体发挥舒张支气 管平滑肌作用的

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30800' and id < 2480609 and id<>'2480609' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30800' and id > 2480609 and id<>'2480609' order by id asc limit 5