ʴ߾BCľ붼1/2. ƽҲ 1/2.
OֱƽACAB=1BP =(3)/2. AO (3)/3 OP = (3)/6ƽƽͻ 1/2.
OֱƽACAB=1BP =(3)/2. AO (3)/3 OP = (3)/6ƽƽͻ 1/2.
所跟帖: ÈüÀ¥ : ¿ÉÖ¤¡£ 2023-05-22 22:29:33
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