海量資源,盡在掌握
 量的名稱單位名稱單位符號換算關(guān)系和說明時間分[小]時天,(日)minhd1min=60s1h=60min=3600s1d=24h=86400s[平面]角[角]秒″1″=(π/648000)rad(π為圓周率)[角]分度′°1′=60″=(π/10800)rad1°=60′=(π/180)rad旋轉(zhuǎn)速度轉(zhuǎn)每分r/min1r/min=(1/60)s-1長度海里nmile1 (共 396 字) [閱讀本文] >>