We don't care if a hunting dog smells _______, but we really don't want him to smell _______.

A．well; well

B．bad; bad

C．well; badly

D．badly; bad

酸蚀症的发生中，哪种酸的危害最大

A．硝酸

B．硫酸

C．盐酸

D．胃酸

E．磷酸