①转动粗准焦螺旋 ②转动细准焦螺旋 ③调节光圈
④转动转换器 ⑤向右上方移动玻片 ⑥向左下方移动玻片.
植物体的组成层次是: ____→组织→ ____→个体。
She reached the top of the hill and stopped _______ on a big rock by the side of the path.