此程序是利用51单片机，控制蜂鸣器接口高低电平，让其发出歌声。-This procedure is the use of 51 single-chip microcomputer to control the buzzer interface high-low, so the issue of voice.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002043s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.116486s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002371s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003262s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002749s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005232s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002039s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003409s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014871s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002211s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 178274 [ RunTime:0.001136s ]
