超声波的频率范围是多少呢

页面:/news/view-307089/ | 耗时:0.1824 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=307089 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=307089 LIMIT 0,1
select * from tbl_Articles_sphinx where id=307089 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(4968329,4968328,4968327,4968326,4968325,4968324,4968322,4968321,4968320,4961239,4961238,4961237,4961235,4948801,4948800,4948799,4948798,4944290,4944289,4944288,4944287,4944285,4938813,4938812,4938811,4938083,4938082,4929792,4929791,4929790) ORDER BY field (ArticleID,4968329,4968328,4968327,4968326,4968325,4968324,4968322,4968321,4968320,4961239,4961238,4961237,4961235,4948801,4948800,4948799,4948798,4944290,4944289,4944288,4944287,4944285,4938813,4938812,4938811,4938083,4938082,4929792,4929791,4929790)