当正对着蓝板时,园柱和蓝板的截面是圆。当斜对着蓝板时,园柱和蓝板的截面是椭圆。该椭园要比圆大。
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