Have you met ______ form teacher, Miss Steven? She came here only a week ago. [ ]

A. Dan and Betty's

B. Dan's and Betty's

C. Dan and Betty

D. Dan's and Betty

器械灭菌前理想的浸泡溶液是（）。

A．戊二醛

B．合成酚溶液

C．氯制剂

D．75%酒精

E．洗必泰