单项选择题

透射电镜主要用于观察 A.
细胞表面的立体结构 B.
细胞内部的超微结构 C.
活细胞的生长情况 D.
细胞内部的物质转运情况 E.
以上均不是

你可能感兴趣的试题

发现火灾时,单位或个人应该先自救,当自救无效、火越着越大时,再拨打火警电话。

答案：错误

Before it entered the American market, Haier adopted a differentiation strategy and focused on market segmentation. It took its Mini refrigerator, an innovative product, to open its market and rapidly grasp the mind of American consumers, hence achieved victory without fighting. It had creatively applied the winning ideas of Sun Tzu.

答案：错误