【单选题】
Can we change the location for the tung-oil()that for the gum rosin?
A、by
B、for
C、into
D、with
A、by
B、for
C、into
D、with
A、the distance between them remains the same B、the distance between them is changing C、the position between them is not changing D、their positions to the earth remain the same
A、changing the angle of the tilting plate B、changing the speed of the pump C、moving the slide block and rotor D、moving the shaft trunnion block