下列人物中,促使20世纪初的中国社会发生第一次历史巨变的是
A:洪秀全
B:陈独秀
C:孙中山
D:***
—I am very ____ tomorrow's Math test . I am afraid I can't pass this time.
—Cheer up! I'm sure you'll make it.
如图,在△ABC中,∠ABC和∠ACB的平分线交于点F,过点F作EG∥BC分别交AB、AC于点E、G,若BE+CG=18,则线段EG的长为( )