ÌâÄ¿ÄÚÈÝ
Ҫʹ뮺˾۱䣬±ØÐëʹ뮺ËÖ®¼äµÄ¾àÀë½Ó½üµ½£¬Ò²¾ÍÊǽӽüµ½ºËÁ¦Äܹ»·¢Éú×÷Óõķ¶Î§£®ÎïÖÊζȺܸßʱ£¬ë®Ô×Ó½«±äΪµÈÀë×ÓÌ壬µÈÀë×ÓÌåµÄ·Ö×Óƽ¾ù¶¯ÄÜΪ£¬½Ð²£¶ú×ÈÂü³£Êý£¬TΪÈÈÁ¦Ñ§Î¶ȣ®Á½¸ö뮺ËÖ®¼äµÄµçÊÆÄÜ£¬Ê½ÖÐkΪ¾²µçÁ¦³£Á¿£¬rΪµçºÉÖ®¼äµÄ¾àÀ룬Ôò뮺˾۱äµÄζÈÖÁÉÙΪ
A£® | B£® | C£® | D£® |
C
±¾Ì⿼²éÔ×Ӻ˵ĽáºÏÄÜ
ÇáºË¾Û±äÊÇ°ÑÇáºË½áºÏ³ÉÖÊÁ¿½Ï´óµÄºË£¬ÊͷųöºËÄܵķ´Ó¦³Æ¾Û±ä·´Ó¦£¬ÓÖ³ÆΪÈȺ˷´Ó¦£®ËüÐèÒª¼«´óµÄѹǿºÍ¼«¸ßµÄζȣ®ÔÒòÊÇ×Գֵĺ˾۱䷴Ӧ±ØÐëÔÚ¼«¸ßµÄѹÁ¦ºÍζÈϽøÐУ®
Äܹ»Ê¹ë®ºË½Ó½üµ½r0£¬Ò²¾ÍÊÇÄÜÈÃ뮺˴ÓÎÞÇîÔ¶£¨ÆÕͨµÄÆøÌå·Ö×Ó¼ä¾à¼«´ó£¬»ù±¾ÎÞ¿âÂØ×÷Ó㬿ÉÈÏΪÊÇÎÞÇîÔ¶£¬´ËʱµçÊÆÄÜΪ0£©ÒÆÖÁr0£¬ÕâÒ»½×¶Îµç³¡Á¦×ö¸º¹¦£¬Óɶ¯Äܶ¨ÀíÇó½â£®
Äܹ»Ê¹ë®ºË½Ó½üµ½r0£¬Ò²¾ÍÊÇÄÜÈÃ뮺˴ÓÎÞÇîÔ¶£¨ÆÕͨµÄÆøÌå·Ö×Ó¼ä¾à¼«´ó£¬»ù±¾ÎÞ¿âÂ××÷Ó㬿ÉÈÏΪÊÇÎÞÇîÔ¶£¬´ËʱµçÊÆÄÜΪ0£©ÒÆÖÁr0£¬ÕâÒ»½×¶Îµç³¡Á¦×ö¸º¹¦£¬
Óɶ¯Äܶ¨Àí¡÷Ek=Wµç=¡÷Ep£¬
¶ø×îС×îСµ±ë®ºË½Ó½ür0ʱ¶¯ÄÜΪ0£¬¶øÕâÀïµÄÁ½¸ö뮺˶¼Óж¯ÄÜÒò´Ë
2Ek-0=¡÷Ek= T= ¹ÊÑ¡C£®
ÇáºË¾Û±äÊÇ°ÑÇáºË½áºÏ³ÉÖÊÁ¿½Ï´óµÄºË£¬ÊͷųöºËÄܵķ´Ó¦³Æ¾Û±ä·´Ó¦£¬ÓÖ³ÆΪÈȺ˷´Ó¦£®ËüÐèÒª¼«´óµÄѹǿºÍ¼«¸ßµÄζȣ®ÔÒòÊÇ×Գֵĺ˾۱䷴Ӧ±ØÐëÔÚ¼«¸ßµÄѹÁ¦ºÍζÈϽøÐУ®
Äܹ»Ê¹ë®ºË½Ó½üµ½r0£¬Ò²¾ÍÊÇÄÜÈÃ뮺˴ÓÎÞÇîÔ¶£¨ÆÕͨµÄÆøÌå·Ö×Ó¼ä¾à¼«´ó£¬»ù±¾ÎÞ¿âÂØ×÷Ó㬿ÉÈÏΪÊÇÎÞÇîÔ¶£¬´ËʱµçÊÆÄÜΪ0£©ÒÆÖÁr0£¬ÕâÒ»½×¶Îµç³¡Á¦×ö¸º¹¦£¬Óɶ¯Äܶ¨ÀíÇó½â£®
Äܹ»Ê¹ë®ºË½Ó½üµ½r0£¬Ò²¾ÍÊÇÄÜÈÃ뮺˴ÓÎÞÇîÔ¶£¨ÆÕͨµÄÆøÌå·Ö×Ó¼ä¾à¼«´ó£¬»ù±¾ÎÞ¿âÂ××÷Ó㬿ÉÈÏΪÊÇÎÞÇîÔ¶£¬´ËʱµçÊÆÄÜΪ0£©ÒÆÖÁr0£¬ÕâÒ»½×¶Îµç³¡Á¦×ö¸º¹¦£¬
Óɶ¯Äܶ¨Àí¡÷Ek=Wµç=¡÷Ep£¬
¶ø×îС×îСµ±ë®ºË½Ó½ür0ʱ¶¯ÄÜΪ0£¬¶øÕâÀïµÄÁ½¸ö뮺˶¼Óж¯ÄÜÒò´Ë
2Ek-0=¡÷Ek= T= ¹ÊÑ¡C£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿