(1)证明:连接AE交OD于点F,
∵AB为直径,
∴AE⊥BE,
∵BE∥OD,
∴AE⊥OD,
∵AD=AO,
∴AE平分∠CAB,
∴OD=2OF,
∵BE=2OF,
∴BE=OD;
(2)分别作弦BE∥OD,AH∥OF,连接AE,BH,AE与BH交于点P,
由(1)得:E为 同类题1 Many countries in the world have reached an ____ to reduce air pollution. (agree)
Many countries in the world have reached an ____ to reduce air pollution. (agree)
说一说其中百分数所表示的意义.
花生仁的出油率是41%.
41%表示____