ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾֱ½Ç×ø±êϵxOy£¬P(a£¬£b)ΪµÚËÄÏóÏÞÄÚµÄÒ»µã£¬Ò»ÖÊÁ¿Îªm¡¢µçºÉÁ¿ÎªqµÄ¸ºµçºÉ(ÖØÁ¦²»¼Æ)´ÓÔµãOÒÔ³õËÙ¶Èv0ÑØyÖáÕý·½ÏòÉäÈë¡£µÚÒ»´ÎÔÚÕû¸ö×ø±êϵÄÚ¼Ó´¹Ö±ÓÚÖ½ÃæÏòÀïµÄÔÈÇ¿´Å³¡£¬¸ÃµçºÉÇ¡ºÃÄÜͨ¹ýPµã£»µÚ¶þ´Î±£³Öy>0ÇøÓò´Å³¡²»±ä£¬¶ø½«y<0ÇøÓò´Å³¡¸ÄΪÑØxÖá·½ÏòµÄÔÈÇ¿µç³¡£¬¸ÃµçºÉÈÔͨ¹ýPµã¡£Ôò( )
A.ÔÈÇ¿´Å³¡µÄ´Å¸ÐӦǿ¶ÈB£½
B.ÔÈÇ¿´Å³¡µÄ´Å¸ÐӦǿ¶ÈB£½
C.µçºÉ´ÓOÔ˶¯µ½P£¬µÚ¶þ´ÎËùÓÃʱ¼äÒ»¶¨¶ÌЩ
D.µçºÉͨ¹ýPµãʱµÄËٶȣ¬µÚ¶þ´ÎÓëxÖḺ·½ÏòµÄ¼Ð½ÇÒ»¶¨Ð¡Ð©
¡¾´ð°¸¡¿AC
¡¾½âÎö¡¿
AB£®µÚÒ»´ÎÔÚÕû¸ö×ø±êϵÄÚ¼Ó´¹Ö±ÓÚÖ½ÃæÏòÀïµÄÔÈÇ¿´Å³¡£¬¸ÃµçºÉÇ¡ºÃÄÜͨ¹ýPµã£»Á£×Ó×öÔÈËÙÔ²ÖÜÔ˶¯£¬Óɼ¸ºÎ¹ØϵµÃ
(a£R)2£«b2£½R2
½âµÃ
ÓɵÃÔÈÇ¿´Å³¡µÄ´Å¸ÐӦǿ¶È
Ñ¡ÏîAÕýÈ·£¬B´íÎó£»
C£®µÚ¶þ´Î±£³Öy>0ÇøÓò´Å³¡²»±ä£¬¶ø½«y<0ÇøÓò´Å³¡¸ÄΪÑØxÖá·½ÏòµÄÔÈÇ¿µç³¡£¬¸ÃµçºÉÈÔͨ¹ýPµã£¬Á£×ÓÏÈ×öÔÈËÙÔ²ÖÜÔ˶¯£¬ºó×öÀàƽÅ×Ô˶¯£¬Ô˶¯Ê±¼ä
µÚÒ»´ÎÁ£×Ó×öÔÈËÙÔ²ÖÜÔ˶¯£¬Ô˶¯Ê±¼ä
»¡³¤QP´óÓÚb£¬ËùÒÔt1>t2£¬¼´µÚ¶þ´ÎËùÓÃʱ¼äÒ»¶¨¶ÌЩ£¬Ñ¡ÏîCÕýÈ·£»
D£®µçºÉͨ¹ýPµãʱµÄËٶȣ¬µÚÒ»´ÎÓëxÖḺ·½ÏòµÄ¼Ð½ÇΪ¦Á£¬ÔòÓÐ
µÚ¶þ´ÎÓëxÖḺ·½ÏòµÄ¼Ð½Ç¦È£¬ÔòÓÐ
ËùÒÔÓУ¬µçºÉͨ¹ýPµãʱµÄËٶȣ¬µÚ¶þ´ÎÓëxÖḺ·½ÏòµÄ¼Ð½ÇÒ»¶¨´óЩ£¬Ñ¡ÏîD´íÎó£®
¹ÊÑ¡AC¡£
¡¾ÌâÄ¿¡¿ÎªÁ˽ÚÄܺͻ·±££¬Ò»Ð©¹«¹²³¡ËùʹÓùâ¿Ø¿ª¹Ø¿ØÖÆÕÕÃ÷ϵͳ¡£¹â¿Ø¿ª¹ØµÄͨ¶Ï¿Éͨ¹ý¹âÃôµç×èÀ´¿ØÖÆ£¬¹âÃôµç×èÊÇ×èÖµËæ׏âµÄÕնȱ仯¶ø±ä»¯µÄÔª¼þ£¨ÕնȿÉÒÔ·´Ó³¹âµÄÇ¿Èõ£¬¹âԽǿ£¬ÕÕ¶ÈÔ½´ó£¬Õնȵĵ¥Î»Îªlx£©¡£Ä³¹âÃôµç×èÔÚ²»Í¬ÕÕ¶ÈϵÄ×èÖµÈçÏÂ±í£º
Õնȣ¨lx£© | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 | 1.2 |
µç×裨£© | 75 | 40 | 28 | 23 | 20 | 18 |
£¨1£©Çë¸ù¾Ý±íÖÐÊý¾ÝÔÚͼһËùʾµÄ×ø±êϵÖÐÃè»æ³ö¹âÃôµç×èµÄ×èÖµËæÕնȱ仯µÄÇúÏߣ¬²¢ËµÃ÷×èÖµËæÕնȱ仯µÄÌصã_________¡£
£¨2£©Èçͼ¶þËùʾ£¬µ±1¡¢2Á½¶ËËù¼ÓµçѹÉÏÉýÖÁ2 Vʱ£¬¿ØÖÆ¿ª¹Ø×Ô¶¯Æô¶¯ÕÕÃ÷ϵͳ¡£ÇëÀûÓÃÏÂÁÐÆ÷²Ä°´ÒªÇóÉè¼ÆÒ»¸ö¼òµ¥µç·£º¸ø1¡¢2Á½¶ËÌṩµçѹ£¬ÒªÇóÌìÉ«½¥°µÕնȽµµÍÖÁ1.0 lxʱÆô¶¯ÕÕÃ÷ϵͳ£¬ÔÚÐéÏß¿òÄÚÍê³Éµç·ÔÀíͼ___________¡££¨²»¿¼ÂÇ¿ØÖÆ¿ª¹Ø¶ÔËùÉè¼Æµç·µÄÓ°Ï죩
ÌṩµÄÆ÷²ÄÈçÏ£º
¹âÃôµç×裨·ûºÅ£¬×èÖµ¼ûÉÏ±í£©£»
Ö±Á÷µçÔ´E£¨µç¶¯ÊÆ3 V£¬ÄÚ×è²»¼Æ£©£»
¶¨Öµµç×裬£¬£¨ÏÞÑ¡ÆäÖÐÖ®Ò»²¢ÔÚͼÖбê³ö£©£»
¿ª¹ØS¼°µ¼ÏßÈô¸É¡£