ÏðËܱ£Î¹ÜÊDZȽϳ£Óõı£Î²ÄÁÏ£¬Ò»°ãÄãÖ»ÐèÒª²âÁ¿Ò»Ï¹ܵÀʹÓöàÉÙÃ×£¬¹ÜµÀÍâ¾¶£¬¾Í¿ÉÒÔ¹ºÂòÏðËܹÜÁË¡£µ«ÊǺܶàÈ˶¼ÖªµÀ£¬ÏðËÜÒ»°ãÊǰ´m?³ö»õ£¬ÄÇô½ðɳjs1005Ïß·¸ÃÈçºÎ½øÐе¥Î»»»ËãÄØ¡£½ñÌìС±à¾ÍΪ´ó¼ÒÀ´Ïêϸ½éÉÜһϣ¬ÏðËܱ£Î¹ÜÊÇÈçºÎ¼ÆËãÁ¢·½ÊýµÄ¡£
¹«Ê½ÊÇ£º(¦Ð?R?-¦Ð?r?)L?
»¯¼òÊÇ£º(¦Ð?R?-¦Ð?r?)L?=¦Ð?£¨R?-??r?£©ÔËÓÃÖÐѧµÄÒ»¸ö¹«Ê½a?-b?=£¨a+b£©£¨a-b£©
RÖ¸¹ÜµÀ°ë¾¶¼Ó±£Îºñ¶È£¬rÊÇÖ¸¹ÜµÀÍâ¾¶£¬ÆäÖÐR=r+±£Îºñ¶È
2rΪ¹ÜµÀÖ±¾¶d?×îÖÕ»¯¼òΪ£º¦Ð?X£¨d+±£Îºñ¶È£©X±£Îºñ¶ÈXL?×¢£º¦Ð?Ϊ3.14£¬LΪ±£Î¹ܳ¤¶È£¨Ã×£©
×¢Ò⣬µ¥Î»ÒªÍ³Ò»ÎªÃ×£¬µÃ³ö½á¹û²ÅÊÇm?