—Sure. Eric is also ____ it and we become friends because of that.
A:proud of
B:afraid of
C:interested in
D:serious about
如图,⊙O是△ABC的内切圆,切点分别是D、E、F,已知∠A=100°,∠C=30°,则∠DFE的度数是( )
雾霾天气PM2.5超标,对人体造成危害,PM2.5进入人体的途径为( )