ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Èçͼ¼×ËùʾΪÔÚζÈΪ10 ¡æ×óÓҵĻ·¾³Öй¤×÷µÄij×Ô¶¯ºãÎÂÏäÔÀí¼òͼ£¬ÏäÄڵĵç×èR1£½20 k¦¸£¬R2£½10 k¦¸£¬R3£½40 k¦¸£¬RtΪÈÈÃôµç×裬ËüµÄµç×èËæζȱ仯µÄͼÏßÈçͼÒÒËùʾ¡£µ±a¡¢b¶ËµçѹUab£¼0ʱ£¬µçѹ¼ø±ðÆ÷»áÁ¹ØS½Óͨ£¬ºãÎÂÏäÄڵĵçÈÈË¿·¢ÈÈ£¬Ê¹ÏäÄÚζÈÉý¸ß£»µ±Uab£¾0ʱ£¬µçѹ¼ø±ðÆ÷»áÁ¹ØS¶Ï¿ª£¬Í£Ö¹¼ÓÈÈ£¬ºãÎÂÏäÄÚµÄζȺ㶨ÔÚ________¡æ¡£
¡¾´ð°¸¡¿32
¡¾½âÎö¡¿
ÓÉÌâÒâµÃ£ºµ±Uab=0ʱ£¬ºãÎÂÏä±£³ÖÎȶ¨£¬¸ù¾Ý´®²¢Áªµç·µçѹÓëµç×èµÄ¹Øϵ¿ÉÖª£ºR1£ºR2=2£º1 Ö»ÓÐ R3£ºR4ҲΪ2£º1µÄʱºò£¬Uab=0£¬´ËʱµçÇÅƽºâ£®ËùÒÔ¿ÉÖªRtµç×èΪ20k¦¸£¬´ÓͼÒÒ¿ÉÒÔ¿´³ö£¬µç×èΪ20k¦¸Ê±£¬Î¶ÈΪ35ÉãÊ϶ȣ®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿