ThefirstcolorTVwasconstructedin1928,butitwasnotuntil193...
问题详情:ThefirstcolorTVwasconstructedin1928,butitwasnotuntil1938___________thefirstprogramwasbroadcast. A.when B.which C.that D.befo...
问题详情:ThefirstcolorTVwasconstructedin1928,butitwasnotuntil1938___________thefirstprogramwasbroadcast. A.when B.which C.that D.befo...