12·î¤â½ª¤ï¤ê¤½¤¦¤À¤è¡Á(+_+)¡£º£Ç¯¤â»þ´Ö¤¬¿Ê¤à¤Î¤¬Áᤫ¤Ã¤¿¤è¤¦¤Êµ¤¤¬¤·¤Þ¤¹¡£¤µ¤Æ¡¢¸½¾ì¤Ï²¾ÄùÀÚ¹©»Ü¹©Ãæ¤Ç¹ÝÌðÈĸ·¿L=15.0m¤òÂǤÁ¹þ¤ó¤Ç¤¤¤Þ¤¹¡£º£½µ¤ÇÂǤÁ½ª¤ï¤ëͽÄꡣǯÆâÃæ¤Ë¾²·¡¤ò¾¯¤·»Ü¹©¤·Åß´üµÙ²Ë¤ËÆþ¤ê¤Þ¤¹¡£
¹© »ö ̾¡§ºÇ¾åÀî¾åή¹ÓÅÖ¶¶²¼Éô¹©¹©»ö¹©»ö¾ì½ê¡§»³·Á¸©À¾ÃÖ»ò·´ÇòÂëÄ®Âç..