题目内容

Metaplasia epithelium distributed in（）

A. ureter
B. trachea
C. intestines
D. bladder

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The esophagus is a substantial organ.（）

The following organs are substantial organs（）

A. liver
B. lungs
C. ovary
D. spleen

The basic unit of organism structure and function is（）

A. cell
B. tissue
C. organ
D. system

（）is a layer of membrane wrapped, containing a variety of acidic hydrolases of vesicular organelles. The main function is digest foreign matter, bacteria, or lost functioning organelles in cells

A. Mitochondrion
B. Ribosome
C. Lysosome
D. Centrosome