A.50.00 B.70.70 C.100.00 D.141.42
A.5 B.3 C.2 D.4
A.-24mm B.+24mm C.+30mm D.-30mm
A.示坡线B.集水线C.山谷线D.分水线
A.215°56’30” B.214°56’30” C.215°03’30” D.214°03’30”
