Debit note is an accounting document detailing amounts due to be paid by （）.

A. a creditor

B. an exporter

C. an importer

D. a debtor

复发性口疮，按临床分型，溃疡少于3个，直径<5mm，症状轻，称为（）

A.轻型口疮

B.疱疹性溃疡

C.腺周口疮

D.疱疹性口炎

E.白塞综合征