在一条路上栽下18棵树（两端各栽一棵），这条路能分成请选择DCBA2G5r7Y8S1G-Y5U'J0C)R6a0N1Q9n1\(h3Q:[,d7t
A．17段0N1Q9n1\(h3Q:[,d7t
B．18段0N1Q9n1\(h3Q:[,d7t
C．19段0N1Q9n1\(h3Q:[,d7t
D．20段0N1Q9n1\(h3Q:[,d7t