要这么计算光程那我们接下来该讨论相差了:)
开个玩笑哈
•
哈哈哈,我还没有用费马原理来唬人呢:)
-xialibaren-
♂
(0 bytes)
()
11/08/2012 postreply
11:43:25
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy