多项选择题
A.photographs
B.floor plans
C.wired network layout
D.blueprints
单项选择题 TheCiscoAironet1140SeriesAccessPointdraws12.95Watthepowersource.However，whenusingalongEthernetcable，thedevicecandrawuptohowmuchadditionalwattage？（）
单项选择题 Whenusingalightningarrestor，connectwhichtypeofgroundwiretoagoodearthground？（）
单项选择题 Byhowmuchisasignal’sstrengthreducedwhenthesignalpassesthroughanobjectthatintroduces3dBofattenuation？（）