我国生活饮用水水质卫生标准规定自来水中的游离性余氯大于

A．0.1mg/L

B．0.05mg/L

C．0.3mg/L

D．0.2mg/L

E．0.5mg/L

You should have a health（）if you work in a restaurant.

A.diploma

B.certificate

C.license

D.passport