... ÁN1A,2A,3D,4B,5A,6B,7D,8A,9D,10C,11C,12A,13C,14B,15A,16B,17D,18C,19B ,20 D ,21 A ,22 B ,23 A ,24 B ,25 C, 26 B ,27 A ,28 D ,29 D,30B,31C,32D,33AB,34 ,35C,36B,37C,38A,39C,40A,41C,42A,43A,44B,45D,46 ,47A,48C,49D,50D,51A,52B,53A,54A,55B,56D,57B,58C,59C,60C ... Ib = 10 -5 W/m 2 , Lb = 80dB; b) P = 0, 126 W.B. a) Ib = 10 -3 W/m 2 , Lb = 70dB; b) P = 1 ,26 W.C.a) Ib = 10 -5 W/m 2 , Lb = 70dB; b) P = 1 ,26 W.D.a) Ib = 10 -3 W/m 2 , Lb = ... đây?A.UAK = . 2 max0 2 emvB. UAK > . 2 max0 2 emv C.AUAK = - .max0 2 emvD. UAK > - . 2 max0 2 emv(cán bộ coi thi không giải thích gì thêm)ĐÁP ÁN1A,2A,3D,4B,5A,6B,7D,8A,9D,10C,11C,12A,13C,14B,15A,16B,17D,18C,19B ,20 D ,21 A ,22 B ,23 A ,24 B ,25 C, 26 B ,27 A ,28 D ,29 D,30B,31C,32D,33AB,34...