变移上皮依其所在器官的扩张或缩小,上皮细胞的层数和细胞形状均可发生变化。( )
查看答案
微绒毛和纤毛都是细胞表面的突起,但两者的长度和内部结构是不相同的。( )
A. 对
B. 错
假复层纤毛柱状上皮是由几种形状,大小不同的细胞组成,因而是复层上皮。( )
A. 对
B. 错
Choose the correct purpose for each paragraph from the reading passage.Paragraph B
A. to describe the impact of Muniz's project
B. to describe how Muniz carried out his project
C. to give information about the catadores' jobs
D. to show how catadores feel about their work
E. to explain why Muniz did his project