在横线上填人适当的词汇，便句子完整。

小题1:My father’s          is my uncle. He is very kind.

小题2:Her father’s daughter is her          . They are in the same school.

小题3:His mother’s sister is his        

小题4:My aunt’s daughter is my         

小题5:Linda’s mother’s mother is her       

对黏液毯的描述，正确的是（）。

A.外层为水样层

B.内层为黏蛋白

C.其中含有溶菌酶、干扰素、SIgA等生物活性物质

D.外层为黏蛋白

E.内层为水样层