Please don’t bother me again. I’ll inform you of the details at a/an    time if you must know.

A．appropriate

B．convenient

C．acceptable

D．accessible

（）就是全部灯光或90％以上灯光直接照射被照的物体

A.间接照明 

B.直接照明 

C.漫射照明 

D.反射照明