小李是歌舞团的一位优秀的小提琴手,他的耳音特别灵敏,调弦时又准又快。有一天,一位好朋友请他去为一架音律不准的钢琴调音。虽然小李过去没调过钢琴,但出于热心,小李还是抱着试试看的心情而前往了。小李先用音叉调准了A音,然后象调小提琴弦似的用(?)五度的关系相继调准其他各音。即: Xiao Li is a good violinist song and dance troupe, his ear is particularly sensitive, quasi-fast tuning. One day, a good friend asked him to tune in to a piano that was not allowed to sound. Although Mike did not tune the piano in the past, but out of zeal, Xiao Li still try to go with a try. Mike first used a tuning fork alignment A sound, and then like the violin string like (?) Five degrees have been aligned with each other tone. which is: