·ÖÎö £¨i£©ÒÔÁ½¸ö»îÈûºÍ¸ËÕûÌåΪÑо¿¶ÔÏ󣬸ù¾ÝƽºâÌõ¼þÁз½³Ì¼´¿ÉÇó½â´ËʱAÖÐÆøÌåµÄѹǿ£®
£¨ii£©´ò¿ª·§ÃÅKºó£¬ÈÔÒÔÁ½¸ö»îÈûΪÑо¿¶ÔÏ󣬸ù¾ÝƽºâÌõ¼þÇó³ö·§ÃÅ´ò¿ªºó·â±ÕÆøÌåµÄѹǿ£¬ÔÙÓɲ£Òâ¶ú¶¨ÂÉÇó³öÁ½²¿·ÖÆøÌåµÄ³¤¶È£¬Óɼ¸ºÎ¹Øϵ¼´¿ÉÇó½â»îÈûA¡¢BÒƶ¯µÄ¾àÀ룻
½â´ð ½â£º£¨i£©ÒÔÁ½¸ö»îÈûºÍ¸ËÕûÌåΪÑо¿¶ÔÏó£¬Éè³õʼʱ¿ÌѹǿΪP£¬Ôò
$p{S}_{A}^{\;}={p}_{0}^{\;}£¨{S}_{A}^{\;}-{S}_{B}^{\;}£©$
½âµÃ $p=\frac{3}{4}{p}_{0}^{\;}$
£¨ii£©´ò¿ª·§ÃÅKºó£¬ÈÔÒÔÁ½¸ö»îÈûΪÑо¿¶ÔÏó£¬ÉèѹǿΪPAB£¬Ôò
${p}_{AB}^{\;}£¨{S}_{A}^{\;}-{S}_{B}^{\;}£©={p}_{0}^{\;}£¨{S}_{A}^{\;}-{S}_{B}^{\;}£©$
½âµÃ ${p}_{AB}^{\;}={p}_{0}^{\;}$
ÓÉÆø̬·½³Ì¿ÉµÃ
$p{S}_{A}^{\;}a={p}_{AB}^{\;}£¨{S}_{A}^{\;}{l}_{A}^{\;}+{S}_{B}^{\;}{l}_{B}^{\;}£©$
ÇÒ ${l}_{A}^{\;}+{l}_{B}^{\;}=a+b$
½âµÃ ${l}_{A}^{\;}=10cm$
¼´»îÈûA¡¢BÏò×óÒƶ¯£¬Òƶ¯ÁË20cm
´ð£º£¨i£©´ËʱAÖÐÆøÌåµÄѹǿΪ$\frac{3}{4}{p}_{0}^{\;}$£»
£¨ii£©´ò¿ª·§ÃÅKºó£¬»îÈûA¡¢BÏò×óÒƶ¯£¬Òƶ¯20m
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÊÇÑ¡ÔñÇ¡µ±Ñо¿¶ÔÏóÓÉƽºâÌõ¼þÇó½âÆøÌåµÄѹǿ£¬Í¬Ê±¿¼²éÁËÆøÌåʵÑ鶨ÂÉ£¬¹Ø¼üÊÇ״̬²ÎÁ¿µÄÈ·¶¨£¬×¢Ò⼸ºÎ¹ØϵµÄÓ¦Óã®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | ʹÁ½ÖʵãµÄÖÊÁ¿¸÷¼õСһ°ë£¬¾àÀë²»±ä | |
B£® | ʹÆäÖÐÒ»¸öÖʵãµÄÖÊÁ¿¼õСµ½ÔÀ´µÄ$\frac{1}{4}$£®¾àÀë¼õСØÙÔÀ´µÄ$\frac{1}{2}$ | |
C£® | ʹÁ½Öʵã¼äµÄ¾àÀëÔöΪÔÀ´µÄ4±¶£¬ÖÊÁ¿²»±ä | |
D£® | ʹÁ½Öʵã¼äµÄ¾àÀëºÍÖÊÁ¿¶¼¼õΪÔÀ´µÄ$\frac{1}{4}$ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | Æû³µËùÊܵĺÏÍâÁ¦×ö¹¦²»ÎªÁã | |
B£® | Æû³µÔÚÔ˶¯¹ý³ÌÖÐËùÊܺÏÍâÁ¦ÎªÁã | |
C£® | Ç£ÒýÁ¦¶ÔÆû³µ×öµÄ¹¦µÈÓÚÆû³µ¿Ë·þ×èÁ¦×öµÄ¹¦ | |
D£® | ÓÉÓÚ³µËÙ²»±ä£¬ËùÒÔÆû³µ´ÓAµ½B¹ý³ÌÖлúеÄܲ»±ä |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
A£® | AµãµÄËٶȿÉÄÜ´óÓÚ7.9km/s | |
B£® | CµãµÄËÙ¶ÈÒ»¶¨Ð¡ÓÚ7.9km/s | |
C£® | ÎÀÐÇÔÚAµãʱÒýÁ¦µÄ¹¦ÂÊ×î´ó | |
D£® | ÎÀÐÇÓÉCµãÔ˶¯µ½Aµã£¬ÍòÓÐÒýÁ¦µÄƽ¾ù¹¦ÂÊ´óÓÚÎÀÐÇÓÉBÔ˶¯µ½DÍòÓÐÒýÁ¦µÄƽ¾ù¹¦ÂÊ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | ÖØÁ¦¶ÔÈË×ö¸º¹¦ | B£® | Ö§³ÖÁ¦¶ÔÈË×öÕý¹¦ | ||
C£® | Á¦¶ÔÈË×öÕý¹¦ | D£® | ºÏÍâÁ¦¶ÔÈË×ö¹¦ÎªÁã |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com