A:1个
B:2个
C:3个
D:4个
—It's a long story, but you will find that there are few new words in it .—Good! it will be too hard for children.
小亮同学在显微镜下观察一种细胞,他发现这种细胞具有细胞壁、细胞膜、细胞质、细胞核和液泡,这种细胞肯定不是( )