[问答题]
Design a circuit in which two diffz k5:jgwc:j6+w duo + av/2y5zsjh+k7e:pxpqerent swg( ksxai9-ak2o;bc tbn n u616itches of the type shown in (Fig. Below) can co9buta xin6 nag(21s-kk ;6b be used to operate the same lightbulb from opposite sides of a room.
