ÌâÄ¿ÄÚÈÝ

Á½ÁкᲨÑØ×ÅͬһÌõÉþ£¨ÉþÑØx·½Ïò·ÅÖã©ÏàÏò´«²¥£¬Õñ·ù¶¼ÊÇ20cm£®ÊµÏß²¨µÄƵÂÊΪ3.25Hz£¬ÑØxÖáÕý·½Ïò´«²¥£»ÐéÏß²¨ÑØxÖḺ·½Ïò´«²¥£®Ä³Ê±¿ÌÁ½Áв¨ÏàÓö£¬ÈçͼËùʾ£®ÔòÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ(  )

 

A£®Á½Áв¨ÔÚÏàÓöÇøÓò·¢Éú¸ÉÉæÏÖÏó

B£®Í¼Ê¾Ê±¿ÌƽºâλÖÃx=3mµÄÖʵãλÓÚy=£­20cm´¦

C£®´Óͼʾʱ¿ÌÆðÔÙ¹ý0.25s£¬Æ½ºâλÖÃx=4.25mµÄÖʵ㽫λÓÚy=£­40cm´¦

D£®´Óͼʾʱ¿ÌÆðÔÙ¹ý0.25s£¬Æ½ºâλÖÃx=4.25mµÄÖʵ㽫λÓÚy=40cm´¦

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø