Now large numbers of young people in China ________posting voice messages, articles andphotos onto the WeChat (微信) to share with their friends.

A．are used to

B．are used for

C．used to

D．get used for

铣削深度增加，切削层金属（）成倍增加，但（）也成倍增加，切削温度升高（）。

A、变形功和摩擦力；切削宽度；较小

B、变形功；切削刃长度；较大

C、摩擦功；切削宽度；轻小

D、变形功和摩擦力；切削刃长度；较小