单项选择题
A.less than 10 percent B.10 to 15 percent C.15 to 20 percent D.25 to 30 percent
A.Class A B.Class 1 C.Class 2 D.Class 3 E.Class 4
A.5 to 10 percent for both 2.4 GHz and 5 GHz B.10 percent for both 2.4 GHz and 5 GHz C.20 percent for 2.4 GHz and 15 to 20 percent for 5 GHz D.20 percent for 2.5 GHz and 10 percent for 5 GHz