2º£ÑóÒòÄã¶ø¸üÀ¶
èªè¤£ºµÚ¶þ¿Î±êÌâʲôÒâ˼£¿
ÓêÑࣺprtetingthesea±£»¤´óº££¨º£Ñ󣩡£
èªè¤£º´óº£ÄÇô´ó£¬ÈËÓÖÄÇôС£¬»¹ÒªÈ˱£»¤£¿
ÓîÐù£ºÈËËäÄÇôС£¬µ«ÍþÁ¦ÎÞÇî¡£
ÓêÑࣺ¾ÍÏñ΢ÉúÎÄÜÈëÇÖÈËÌå¡£
Ã÷Ô£ºÐ¡µÄ²»¿ÉСê´óµÄÒ²Òª±£»¤¡£
ÓîÐù£ºº£ÑóÎÛȾÄÇôÑÏÖØ£¬²»¼Ó±£»¤ÐÔÖÊÑÏÖØ¡£Î£¼°º£ÑóÉúÎΣº¦ÈËÀཡ¿µ¡£
èªè¤£º¿Ú˵ÎÞÆ¾£¬Àý¾ÙÒ»¶þ¡£
ÎÅÐÀ£º°×É«ÎÛȾ£¬»¯Ñ§ÎïÆ·£¬»¹ÓÐÓÍÎÛ¡£
Ã÷Ô£º¸÷ÖÖÅŷżÓÉÏÆäËûÀ¬»ø¡£¶à°ëÀ´×Ô¹¤Å©Òµ·ÏÆúÎï¡£
èªè¤£ºÕÒµ½ÔÒò£¬ÈçºÎÖÎÀí£¿
ÓêÑࣺ¸÷¼¶²¿ÃÅ·Ö¹¤Ð×÷£¬Ñ°ÕÒ·½·¨¼õÉÙÎÛȾ£¬»¹Òª¼Ç¼ÎÛȾµÈ¼¶£¬²é´¦ÎÛÈ¾Ô´Í·ÍÆ¡£
èªè¤£ºÏëµÄ°ì·¨»¹¿ÉÒÔ£¬ÊµÊ©ÆðÀ´²»ÈÝÒס£
2.º£ÑóÒòÄã¶ø¸üÀ¶(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ