在划分工序时可以采用()或()的原则。
参考答案:工序集中;工序分散
同学们还记得观察“洋葱表皮细胞”时的惊喜吗?如图是显微镜的结构和观察的过程,请你按箭头指示的6个视野顺序,一步步地回忆当时的操作,并将每一步的操作过程补充完整.([]内填写字母)
(1)注视目镜,同时转动[A]______.
(2)放置玻片标本,转动______粗转焦螺旋.
(3)转动[______]______,使图象更清晰.
(4)向______移动玻片标本.
(5)转动转换器,使物镜[______]对准通光孔.
—What did Maria say
— ().
A. Maria said that she likes their uniforms.
B. Maria said that she doesn't like their uniforms.
C. Maria said that she didn't like their uniforms.
D. Maria said that she was like their uniforms.