The human skin forms ______against the action of physical, chemical, and bacteri

游客2024-01-05  22

问题 The human skin forms ______against the action of physical, chemical, and bacterial agents on the deeper tissues.

选项 A、how protective a barrier is
B、a protective barrier
C、a barrier protects
D、and which a barrier protects

答案 B

解析
转载请注明原文地址:https://tihaiku.com/zcyy/3334747.html
最新回复(0)