下列各项，既属致病因素，又属病理产物的是（）
A.戾气
B.暑邪
C.燥邪
D.痰饮
E.七情
参考答案：D
In your software development project you have to wait for 5 days after ordering a new software and then only you can start integration testing. The 5 days in this case is an example of （）.
A．lead
B．lag
C．delay
D．float
操作电工接手柴油发电机组后，首先要核实哪三条要点？
