—He didn’t feel a bit nervous when ____.

—No.He’d had a lot of time _____for it after all.  

A．interviewing;to prepare

B．interviewed;to prepare

C．interviewing;preparing

D．being interviewed;preparing

分析时间预设定为酶促反应的零级反应区内进行测定的方法为

A．一点法

B．二点法

C．三点法

D．二点速率法

E．速率A法