单词	选项单控制
释义	选项单控制menu control
随便看	ratio of quick asset to current liability ratio of ranges ratio of reduction ratio of refraction ratio of reinforcement ratio of revolution ratio of revolution difference ratio of revolutions ratio of rise ratio of rotating speed difference ratio of runoff ratio of segregation ratio of similitude ratio of slenderness ratio of slope ratio of specific hear ratio of specific heat ratio of specific heat capacity ratio of specific heats ratio of stroke to diameter ratio of surplus to net worth ratio of the circumference of a circle to its diameter ratio of tip-section chord to root-section chord ratio of trade account payable to purchase ratio of transformation