.—We’ll eat as soon as the meat is done.

—It has__________to cook for another five minutes.

A．still

B．yet

C．already

D．may

既能影响易水解药物的稳定性，又与药物氧化反应有密切关系的是

A．pH

B．广义的酸碱催化

C．溶剂

D．离子强度

E．空气