(1)取显微镜时,一手握[______]______,一手托[______]______. (2)对光时应转动[______]______,让低倍物镜对准通光孔;在显微镜下观察标本时,若光线较暗,要使视眼明亮可调节[______]______ 和[______]______. (3)当调焦转动粗准焦螺旋时,眼睛应从______ 面,注视物镜与玻片的距离并下降镜筒,以免损坏______. (4)观察显微镜时,应用______ 眼注视目镜内,同时另一只眼要______便于同时画图等. (5)将低倍物镜换成高倍物镜观察时,用手拨动______ 即可观察,如果物像不清楚,则调节[______]______. |