《本草经集注》的作者是
A．陶弘景 B．赵学敏 C．李时珍 D．唐慎微 E．苏敬
参考答案：A
Was it ________ the conference of APEC that made Shanghai the focus of the world then?
A．holding
B．to hold
C．held
D．having held
8086/8088与外设进行数据交换时，经常会在( )后进入等待周期。
A．T1 B．T2 C．T3 D．T4
