如图,已知Rt△ABC中,∠C=90°,AC=6,BC=8,则tanA的值为( )
学习了凸透镜成像规律后,某同学要探究“凸透镜成实像时,像距与物距的关系”.实验中,应使物距____(选填“小于”、“等于”或“大于”)焦距.该实验至少应收集____组数据.
New year is coming, we should make resolutions________the beginning of the year.
线段AB=10cm,点C是线段AB的黄金分割点,且AC>BC,则AC与AB的关系是( )