ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿¿ÆѧÈÕÒæ½ø²½£¬ÈËÃǾ¹ý³¤Æڹ۲⣬ÈËÃÇÔÚÓîÖæÖÐÒѾ·¢ÏÖÁË¡°Ë«ÐÇϵͳ¡±£®¡°Ë«ÐÇϵͳ¡±ÓÉÁ½¿ÅÏà¾à½Ï½üµÄºãÐÇ×é³É£¬Ã¿¸öºãÐǵÄÏ߶ÈԶСÓÚÁ½¸öÐÇÌåÖ®¼äµÄ¾àÀ룬¶øÇÒË«ÐÇϵͳһ°ãÔ¶ÀëÆäËûÌìÌå¡£ÈçͼËùʾ£¬Á½¿ÅÐÇÇò×é³ÉµÄË«ÐÇ£¬ÔÚÏ໥֮¼äµÄÍòÓÐÒýÁ¦×÷ÓÃÏ£¬ÈÆÁ¬ÏßÉϵÄOµã×öÖÜÆÚÏàͬµÄÔÈËÙÔ²ÖÜÔ˶¯£®ÏÖ²âµÃÁ½¿ÅÐÇÖ®¼äµÄ¾àÀëΪL£¬ÖÊÁ¿Ö®±ÈΪm1£ºm2=2£º3£¬ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨ £©
A. m1¡¢m2×öÔ²ÖÜÔ˶¯µÄÏßËÙ¶ÈÖ®±ÈΪ2:3 B. m1¡¢m2×öÔ²ÖÜÔ˶¯µÄ½ÇËÙ¶ÈÖ®±ÈΪ3:2
C. m1×öÔ²ÖÜÔ˶¯µÄ°ë¾¶Îª2L/5 D. m2×öÔ²ÖÜÔ˶¯µÄ°ë¾¶Îª2L/5
¡¾´ð°¸¡¿D
¡¾½âÎö¡¿Ë«ÐÇϵͳ¿¿Ï໥¼äµÄÍòÓÐÒýÁ¦ÌṩÏòÐÄÁ¦£¬½ÇËٶȴóСÏàµÈ£¬ÏòÐÄÁ¦´óСÏàµÈ£¬¹ÊÓУº
m1r1¦Ø2£½m2r2¦Ø2£¬ËùÒÔ£»ÓÖr1+r2=L£¬ËùÒԿɵÃr1£½L£¬r2£½L£¬ÔòBC´íÎó£¬DÕýÈ·£»¾Ýv=r¦Ø¿ÉÖª£¬ £¬¹ÊA´íÎó£»¹ÊÑ¡D£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿