—I hope you don’t mind my opening the window.

— _____ . It’s much too hot here.

A．Certainly

B．Of course not

C．All right

D．Never mind

用于定量的测定尿-17羟、17-酮、肾上腺素等标本保存的防腐剂是

A.40％甲醛 

B.甲苯 

C.二甲苯 

D.浓盐酸 

E.4％甲醛