Where does the largest part of revenue come from().

A.Consumers and Salons activities.

B.Skincare products.

C.Make-up.

D.Hair care products.

新造柴油机台架安装或在船上安装或大修后柴油机的安装均需进行（）测量。

A.活塞运动部件校中

B.活塞运动部件装配精度

C.固定件位置精度

D.运转情况