大剂量的降钙素能在15分钟内引起血钙降低，其原因是（      ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25950' and id < 2180160 and id<>'2180160' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25950' and id > 2180160 and id<>'2180160' order by id asc limit 5