ÌâÄ¿ÄÚÈÝ

Èçͼ49Ëùʾ£¬Ò»´øµçÁ£×ÓÒÔˮƽËÙ¶Èv0 (v0 < E/B)ÏȺó½øÈë·½Ïò»¥Ïà´¹Ö±µÄÔÈÇ¿µç³¡ºÍÔÈÇ¿´Å³¡ÇøÓò£¬ÒÑÖªµç³¡·½ÏòÊúÖ±ÏòÏ£¬Á½¸öÇøÓòµÄ¿í¶ÈÏàͬÇÒ½ôÁÚÔÚÒ»Æð£¬ÔÚ´øµçÁ£×Ó´©¹ýµç³¡ºÍ´Å³¡µÄ¹ý³ÌÖУ¬£¨ÆäËùÊÜÖØÁ¦ºöÂÔ²»¼Æ£©£¬µç³¡ºÍ´Å³¡¶ÔÁ£×ÓËù×öµÄ¹¦ÎªW1£»Èô°Ñµç³¡ºÍ´Å³¡Õý½»Öصþ£¬Èçͼ50Ëùʾ£¬Á£×ÓÈÔÒÔ³õËÙ¶Èv0´©¹ýÖصþ³¡Çø£¬ÔÚ´øµçÁ£×Ó´©¹ýµç³¡ºÍ´Å³¡µÄ¹ý³ÌÖУ¬µç³¡ºÍ´Å³¡¶ÔÁ£×ÓËù×öµÄ×ܹ¦ÎªW2£¬±È½ÏW1ºÍW2£¬Ôò £¨  £©

 

A£®Ò»¶¨ÊÇW1> W2    B£®Ò»¶¨ÊÇW1£½W2

C£®Ò»¶¨ÊÇW1£¼W2   D£®¿ÉÄÜÊÇW1 < W2£¬Ò²¿ÉÄÜÊÇW1 > W2

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø