锚杆按杆体材料可分为木锚杆、竹锚杆、金属锚杆和（）。
A.机械式锚杆
B.树脂锚杆
C.涨壳式锚杆
D.锥形锚杆
参考答案：B
There are trees and flowers along both sides of the road______ our school.
A．leading to
B．defeated
C．won
D．gained
