ÌâÄ¿ÄÚÈÝ
£¨1£©Í¼£¨a£©ËùʾÂÝÐý²â΢Æ÷µÄ¶ÁÊýΪ______ mm£»Í¼£¨b£©ËùʾÓα꿨³ßµÄ¶ÁÊýΪ______ cm£®£¨2£©ÈçͼCʾ£¬Ä³Í¬Ñ§ÓòåÕë·¨²â¶¨Ò»°ëÔ²Ðβ£Á§×©µÄÕÛÉäÂÊ£®ÔÚƽÆ̵İ×Ö½ÉÏ´¹Ö±Ö½Ãæ²å´óÍ·ÕëP1¡¢P2È·¶¨ÈëÉä¹âÏߣ¬²¢ÈÃÈëÉä¹âÏß¹ýÔ²ÐÄO£¬ÔÚ²£Á§×©£¨Í¼ÖÐʵÏß²¿·Ö£©ÁíÒ»²à´¹Ö±Ö½Ãæ²å´óÍ·ÕëP3£¬Ê¹P3µ²×¡P1¡¢P2µÄÏñ£¬Á¬½ÓOP3£®Í¼ÖÐMNΪ·Ö½çÃ棬ÐéÏß°ëÔ²Óë²£Á§×©¶Ô³Æ£¬B¡¢C·Ö±ðÊÇÈëÉä¹âÏß¡¢ÕÛÉä¹âÏßÓëÔ²µÄ½»µã£¬AB¡¢CD¾ù´¹Ö±ÓÚ·¨Ïß²¢·Ö±ð½»·¨ÏßÓÚA¡¢Dµã£®
¢ÙÉèABµÄ³¤¶ÈΪL1£¬AOµÄ³¤¶ÈΪL2£¬CDµÄ³¤¶ÈΪL3£¬DOµÄ³¤¶ÈΪL4£¬Îª½Ï·½±ãµØ±íʾ³ö²£Á§×©µÄÕÛÉäÂÊ£¬ÐèÓÿ̶ȳ߲âÁ¿______£¬Ôò²£Á§×©µÄÕÛÉäÂʿɱíʾΪ______£®
¢Ú¸ÃͬѧÔÚ²å´óÍ·ÕëP3Ç°²»Ð¡ÐĽ«²£Á§×©ÒÔOΪԲÐÄ˳ʱÕëת¹ýһС½Ç¶È£¬Óɴ˲âµÃ²£Á§×©µÄÕÛÉäÂʽ«______ £¨Ìî¡°Æ«´ó¡±¡¢¡°Æ«Ð¡¡±»ò¡°²»±ä¡±£©£®
¡¾´ð°¸¡¿·ÖÎö£º£¨1£©Óα꿨³ß¶ÁÊýµÄ·½·¨ÊÇÖ÷³ß¶ÁÊý¼ÓÉÏÓαê¶ÁÊý£¬²»Ðè¹À¶Á£®ÂÝÐý²â΢Æ÷µÄ¶ÁÊý·½·¨Êǹ̶¨¿Ì¶È¶ÁÊý¼ÓÉϿɶ¯¿Ì¶È¶ÁÊý£¬ÔÚ¶Á¿É¶¯¿Ì¶È¶ÁÊýʱÐè¹À¶Á£®
£¨2£©¢ÙÓòåÕë·¨²â¶¨°ëÔ²Ðβ£Á§×©ÕÛÉäÂʵÄÔÀíÊÇÕÛÉ䶨ÂÉn=£¬¸ù¾Ý¼¸ºÎ֪ʶ¿ÉµÃµ½ÈëÉä½ÇµÄÕýÏÒÓëÔ²µÄ°ë¾¶ÓëABµÄ³¤¶Èl1µÄ¹Øϵ¡¢ÕÛÉä½ÇµÄÕýÏÒÓëÔ²µÄ°ë¾¶ÓëCDµÄ³¤¶Èl1µÄ¹Øϵ£¬¼´¿ÉµÃµ½ÐèÒª²âÁ¿µÄÁ¿£®
¢Ú¸ÃͬѧÔÚ²å´óÍ·ÕëP3Ç°²»Ð¡ÐĽ«²£Á§×©ÒÔOΪԲÐÄ˳ʱÕëת¹ýһС½Ç¶È£¬ÕÛÉä¹âÏß½«Ë³Ê±Õëת¶¯£¬×÷ͼʱÈëÉä½Ç²»±ä£¬ÕÛÉä½Ç¼õС£¬ÔòÖªnµÄ²âÁ¿Öµ±ä´ó£®
½â´ð£º½â£º£¨1£©ÂÝÐý²â΢Æ÷µÄ¹Ì¶¨¿Ì¶È¶ÁÊýΪ3.5mm£¬¿É¶¯¿Ì¶È¶ÁÊýΪ0.01×20.0mm=0.200mm£¬ËùÒÔ×îÖÕ¶ÁÊýΪ3.700mm£®
Óα꿨³ßµÄ¹Ì¶¨¿Ì¶È¶ÁÊýΪ6mm£¬Óαê¶ÁÊýΪ0.1×2mm=0.2mm£¬ËùÒÔ×îÖÕ¶ÁÊýΪ6mm+0.2mm=6.2mm=0.62cm£®
¹Ê±¾Ìâ´ð°¸Îª£º3.700£¬0.62£»
£¨2£©¢Ù¸ù¾Ý¼¸ºÎ֪ʶµÃ£¬ÈëÉä½ÇµÄÕýÏÒsini=£¬ÕÛÉä½ÇµÄÕýÏÒsinr==£¬ÓÖBO=OC£¬ÔòÕÛÉäÂÊΪn==£®¹ÊÐèÒª²âÁ¿µÄÁ¿ÓÐl1 ºÍl3£»
¢Ú¸ÃͬѧÔÚ²å´óÍ·ÕëP3Ç°²»Ð¡ÐĽ«²£Á§×©ÒÔOΪԲÐÄ˳ʱÕëת¹ýһС½Ç¶È£¬ÕÛÉä¹âÏß½«Ë³Ê±Õëת¶¯£¬¶ø×÷ͼʱÈÔÒÔMNΪ±ß½ç£¬ADΪ·¨Ïߣ¬ÔòÈëÉä½Ç²»±ä£¬ÕÛÉä½Ç¼õС£¬ÓÉÕÛÉäÂʹ«Ê½ÂÉn=¿ÉÖª£¬²âµÃ²£Á§×©µÄÕÛÉäÂʽ«Æ«´ó£®
¹Ê´ð°¸Îª£º¢Ùl1 ºÍl3£»n=£»¢ÚÆ«´ó£®
µãÆÀ£º½â¾ö±¾ÌâµÚÒ»ÎʹؼüÕÆÎÕÓα꿨³ßºÍÂÝÐý²â΢Æ÷µÄ¶ÁÊý·½·¨£¬Óα꿨³ß¶ÁÊýµÄ·½·¨ÊÇÖ÷³ß¶ÁÊý¼ÓÉÏÓαê¶ÁÊý£¬²»Ðè¹À¶Á£¬ÂÝÐý²â΢Æ÷µÄ¶ÁÊý·½·¨Êǹ̶¨¿Ì¶È¶ÁÊý¼ÓÉϿɶ¯¿Ì¶È¶ÁÊý£¬ÔÚ¶Á¿É¶¯¿Ì¶È¶ÁÊýʱÐè¹À¶Á£»µÚ¶þÎÊÓòåÕë·¨²â¶¨°ëÔ²Ðβ£Á§×©ÕÛÉäÂÊ£¬Êý¾Ý´¦ÀíµÄ·½·¨Êǵ¥Î»Ô²·¨£¬·ÖÎöÎó²î¹Ø¼ü·ÖÎöÈëÉä½ÇºÍÕÛÉä½Ç²úÉúµÄÎó²î£¬ÓÉʵÑéÔÀíÂÉn=·ÖÎö£®
£¨2£©¢ÙÓòåÕë·¨²â¶¨°ëÔ²Ðβ£Á§×©ÕÛÉäÂʵÄÔÀíÊÇÕÛÉ䶨ÂÉn=£¬¸ù¾Ý¼¸ºÎ֪ʶ¿ÉµÃµ½ÈëÉä½ÇµÄÕýÏÒÓëÔ²µÄ°ë¾¶ÓëABµÄ³¤¶Èl1µÄ¹Øϵ¡¢ÕÛÉä½ÇµÄÕýÏÒÓëÔ²µÄ°ë¾¶ÓëCDµÄ³¤¶Èl1µÄ¹Øϵ£¬¼´¿ÉµÃµ½ÐèÒª²âÁ¿µÄÁ¿£®
¢Ú¸ÃͬѧÔÚ²å´óÍ·ÕëP3Ç°²»Ð¡ÐĽ«²£Á§×©ÒÔOΪԲÐÄ˳ʱÕëת¹ýһС½Ç¶È£¬ÕÛÉä¹âÏß½«Ë³Ê±Õëת¶¯£¬×÷ͼʱÈëÉä½Ç²»±ä£¬ÕÛÉä½Ç¼õС£¬ÔòÖªnµÄ²âÁ¿Öµ±ä´ó£®
½â´ð£º½â£º£¨1£©ÂÝÐý²â΢Æ÷µÄ¹Ì¶¨¿Ì¶È¶ÁÊýΪ3.5mm£¬¿É¶¯¿Ì¶È¶ÁÊýΪ0.01×20.0mm=0.200mm£¬ËùÒÔ×îÖÕ¶ÁÊýΪ3.700mm£®
Óα꿨³ßµÄ¹Ì¶¨¿Ì¶È¶ÁÊýΪ6mm£¬Óαê¶ÁÊýΪ0.1×2mm=0.2mm£¬ËùÒÔ×îÖÕ¶ÁÊýΪ6mm+0.2mm=6.2mm=0.62cm£®
¹Ê±¾Ìâ´ð°¸Îª£º3.700£¬0.62£»
£¨2£©¢Ù¸ù¾Ý¼¸ºÎ֪ʶµÃ£¬ÈëÉä½ÇµÄÕýÏÒsini=£¬ÕÛÉä½ÇµÄÕýÏÒsinr==£¬ÓÖBO=OC£¬ÔòÕÛÉäÂÊΪn==£®¹ÊÐèÒª²âÁ¿µÄÁ¿ÓÐl1 ºÍl3£»
¢Ú¸ÃͬѧÔÚ²å´óÍ·ÕëP3Ç°²»Ð¡ÐĽ«²£Á§×©ÒÔOΪԲÐÄ˳ʱÕëת¹ýһС½Ç¶È£¬ÕÛÉä¹âÏß½«Ë³Ê±Õëת¶¯£¬¶ø×÷ͼʱÈÔÒÔMNΪ±ß½ç£¬ADΪ·¨Ïߣ¬ÔòÈëÉä½Ç²»±ä£¬ÕÛÉä½Ç¼õС£¬ÓÉÕÛÉäÂʹ«Ê½ÂÉn=¿ÉÖª£¬²âµÃ²£Á§×©µÄÕÛÉäÂʽ«Æ«´ó£®
¹Ê´ð°¸Îª£º¢Ùl1 ºÍl3£»n=£»¢ÚÆ«´ó£®
µãÆÀ£º½â¾ö±¾ÌâµÚÒ»ÎʹؼüÕÆÎÕÓα꿨³ßºÍÂÝÐý²â΢Æ÷µÄ¶ÁÊý·½·¨£¬Óα꿨³ß¶ÁÊýµÄ·½·¨ÊÇÖ÷³ß¶ÁÊý¼ÓÉÏÓαê¶ÁÊý£¬²»Ðè¹À¶Á£¬ÂÝÐý²â΢Æ÷µÄ¶ÁÊý·½·¨Êǹ̶¨¿Ì¶È¶ÁÊý¼ÓÉϿɶ¯¿Ì¶È¶ÁÊý£¬ÔÚ¶Á¿É¶¯¿Ì¶È¶ÁÊýʱÐè¹À¶Á£»µÚ¶þÎÊÓòåÕë·¨²â¶¨°ëÔ²Ðβ£Á§×©ÕÛÉäÂÊ£¬Êý¾Ý´¦ÀíµÄ·½·¨Êǵ¥Î»Ô²·¨£¬·ÖÎöÎó²î¹Ø¼ü·ÖÎöÈëÉä½ÇºÍÕÛÉä½Ç²úÉúµÄÎó²î£¬ÓÉʵÑéÔÀíÂÉn=·ÖÎö£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿