I don't think the charge for overhauling （大修）the equipment is excessive in to its size.A

网友回答

A. correspondence
B. equation
(答案→)C. proportion
D. dimension
解析：in proportion to是固定搭配, 意为“与......成比例, 与.......相称”。反义语：out of proportion不成比例,不相称。本题称。
本题译文：我认为该设备的大修费并不过分, 是与它的大小相称的。