如图,AB∥CD,∠1=58°,FG平分∠EFD,则∠FGB的度数等于( )
A:122°
B:151°
C:116°
D:97°
3SiO2(s)+6C(s)+2N2(g) ⇌高温 Si3N4(s)+6CO(g)
读南亚地形图和相关地图,回答下列问题.