A:甲。乙两山的相对高度为2 479米
B:C,D是山谷,E,F是山脊
C:G是陡崖,A是鞍部
D:C,D和E,F都是山谷
关于胎儿获得营养物质的途径,下列正确的是( )
People often think the grass is always greener on _________ side of the fence (篱笆).