不属于成像技术参数的是（）
A.摄影设备
B.标称焦点
C.管电压
D.总滤过
E.体位设计
参考答案：E
I hear they’ve promoted Tom, but he didn’t mention _____ when we talked on the phone.
A．to promote
B．having been promoted
C．having promoted
D．to be promoted
选用设备润滑油时应注意哪些方面？
