ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ,ABºÍCDÊÇ×ã¹»³¤µÄƽÐй⻬µ¼¹ì,Æä¼ä¾àΪl,µ¼¹ìƽÃæÓëˮƽÃæµÄ¼Ð½ÇΪ¦È.Õû¸ö×°Öô¦ÔڴŸÐӦǿ¶ÈΪB¡¢·½Ïò´¹Ö±ÓÚµ¼¹ìƽÃæÏòÉϵÄÔÈÇ¿´Å³¡ÖÐ.AC¶ËÁ¬Óеç×èֵΪRµÄµç×è.Èô½«Ò»ÖÊÁ¿ÎªM,´¹Ö±ÓÚµ¼¹ìµÄ½ðÊô°ôEFÔÚ¾àBD¶Ës´¦Óɾ²Ö¹ÊÍ·Å,ÔÚEF°ô»¬ÖÁµ×¶ËÇ°»áÓмÓËÙºÍÔÈËÙÁ½¸öÔ˶¯½×¶Î.½ñÓôóСΪF¡¢·½ÏòÑØбÃæÏòÉϵĺãÁ¦°ÑEF°ô´ÓBDλÖÃÓɾ²Ö¹ÍÆÖÁ¾àBD¶Ës´¦,ͻȻ³·È¥ºãÁ¦F,°ôEF×îºóÓֻص½BD¶Ë.(½ðÊô°ô¡¢µ¼¹ìµÄµç×è¾ù²»¼Æ)Çó:
(1)EF°ôÏ»¬¹ý³ÌÖеÄ×î´óËÙ¶È.
(2)EF°ô×ÔBD¶Ë³ö·¢Óֻص½BD¶ËµÄÕû¸ö¹ý³ÌÖÐ,ÓжàÉÙµçÄÜת»¯³ÉÁËÄÚÄÜ?
(1) (2) Fs-2.
½âÎö
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
ÈçͼËùʾ,abºÍcd·Ö±ðÊÇ·ÅÔÚ±äѹÆ÷Á½²à¹â»¬Ë®Æ½µ¼¹ìÉϵĵ¼Ìå,cdÔÀ´¾²Ö¹,ͨµçµ¼ÏßÓëabÔÚͬһƽÃæÄÚ£¨ £©
A£®abÏòÓÒÔÈËÙÔ˶¯Ê±,cdÒ»¶¨ÏòÓÒÔ˶¯ |
B£®abÏòÓÒÔÈËÙÔ˶¯Ê±,cd²»¿ÉÄÜÔ˶¯ |
C£®abÏòÓÒ¼ÓËÙÔ˶¯Ê±,cdÒ»¶¨ÏòÓÒÔ˶¯ |
D£®abÏòÓÒ¼ÓËÙÔ˶¯Ê±,Ò»¶¨Ïò×óÔ˶¯. |