ÌâÄ¿ÄÚÈÝ

¡¾ÌâÄ¿¡¿Èçͼ£¬Ò»ÀíÏë±äѹÆ÷Ô­¡¢¸±ÏßȦµÄÔÑÊý·Ö±ðΪn¡¢n2Ô­ÏßȦͨ¹ýÒ»ÀíÏëµçÁ÷±íA½ÓÕýÏÒ½»Á÷µçÔ´£¬Ò»¸ö¶þ¼«¹ÜºÍ×èֵΪRµÄ¸ºÔصç×è´®Áªºó½Óµ½¸±ÏßȦµÄÁ½¶Ë£º¼ÙÉè¸Ã¶þ¼«¹ÜµÄÕýÏòµç×èΪÁ㣬·´Ïòµç×èΪÎÞÇî´ó¡£Óý»Á÷µçѹ±í²âµÃa¡¢b¶ËºÍc¡¢d¶ËµÄµçѹ·Ö±ðΪUabºÍUcd£¬Ôò

A. Uab:Ucd=n1:n2

B. Ôö´ó¸ºÔصç×èµÄ×èÖµR£¬µçÁ÷±íµÄ¶ÁÊý±äС

C. ¸ºÔصç×èµÄ×èֵԽС£¬cd¼äµÄµçѹUcdÔ½´ó

D. ½«¶þ¼«¹Ü¶Ì·£¬µçÁ÷±íµÄ¶ÁÊý¼Ó±¶

¡¾´ð°¸¡¿BD

¡¾½âÎö¡¿¼ÙÉ踱ÏßȦÁ½¶ËµçѹµÄÓÐЧֵΪU2£¬¸ù¾ÝÀíÏë±äѹÆ÷µÄµçѹÓëÔÑÊý³ÉÕý±È£¬¼´ÓУºUab£ºU2=n1£ºn2£»¶øÒò¶þ¼«¹ÜµÄµ¥Ïòµ¼µçÐÔ£¬cd¼äµçѹµÄÓÐЧֵ²¢²»µÈÓÚ¸±ÏßȦÁ½¶ËµÄµçѹÓÐЧֵ£¬ËùÒÔUab£ºUcd²»µÈÓÚn1£ºn2£»£¬¹ÊA´íÎ󣻸±ÏßȦÁ½¶ÎµÄµçѹÒÀÀµÓÚÊäÈëµçѹºÍÔÑÊý£¬ËùÒÔ¸±ÏßȦÁ½¶ËµÄµçѹ²»±ä£¬µç×èÔö´ó£¬ÔòµçÁ÷¼õС£¬¸±ÏßȦµÄ¹¦ÂʼõС£¬×îºóʹµÃ ÊäÈ빦ÂʼõС£¬¶øÊäÈëµçѹ²»±ä£¬×îºóʹµÃµçÁ÷¼õС£¬ËùÒÔµçÁ÷±íµÄʾÊý¼õС£¬¹ÊBÕýÈ·£»cd¼äµÄµçѹÓÉÔ­ÏßȦµÄÊäÈëµçѹÒÔ¼°Ô­¡¢¸±ÏßȦµÄÔÑÊý±ÈÓйأ¬Ó븺Ôصç×èÎ޹أ¬ËùÒÔcd¼äµÄµçѹUcd²»»áËæןºÔصç×è±ä»¯£¬¹ÊC´íÎó£»¼ÙÉ踱ÏßȦÁ½¶Ë½»±äµçѹµÄ·åֵΪUm£¬¸±ÏßȦ»Ø·µÄµçÁ÷·åֵΪIm£¬Ôò¶þ¼«¹Ü¶Ì·ǰÓУº¸±ÏßȦÁ½¶ËµçѹµÄÓÐЧֵ £¬ÓɼÆËãµç×èRµÄµçÄܵ㺠£¬ÇóµÃ £®¸±ÏßȦ»Ø·µçÁ÷µÄÓÐЧֵ £¬ÓÉW=I2Rt¼ÆËãµç×èRµÄµçÄܵ㺣¬ÇóµÃ£®Ôò

¶þ¼«¹Ü¶Ì·ºóÓУºcdÁ½¶ËµçѹµÈÓÚ¸±ÏßȦÁ½¶Ëµçѹ£¬¼´ £¬Á÷¾­¶¨Öµµç×èRµÄµçÁ÷£®ÔòP¡äcd=U¡äcdI¡äcd=£®ËùÒÔP¡äcd=2Pcd£®ÓÉÓÚÀíÏë±äѹÆ÷Ô­ÏßȦÉϵŦÂÊÓ븱ÏßȦµÄÏàµÈ£¬¶øÔ­ÏßȦÉϵĵçѹÓÐЧֵ²»±ä£¬ËùÒÔ¶þ¼«¹Ü¶Ì·ºóµÄµçÁ÷±í¶ÁÊýÊǶþ¼«¹Ü¶Ì·ǰµÄ2±¶£®¹ÊDÕýÈ·£®¹ÊÑ¡BD£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø