Many restaurant menus include the origins of a dish, _______ it is prepared, what the main ingredients are, and which farms the ingredients come from.

A．when

B．how

C．what

D．which

青霉素对下列何种疾病基本无效

A．梅毒

B．非典型性肺炎

C．破伤风

D．猩红热

E．大叶性肺炎