道床病害防治手段有哪些?
参考答案:
改善道床质量、整治基床病害,恢复基床的密实度和排水顺畅、避免作业中对原有路基的破坏、综合整治接头病害、减小道床污染。
A.(A) When you just have a raise in salary.
B.(B) When you have found a better job.
C.(C) When you are the only one to leave.
D.(D) When you are asked to resign.
(1)收割 (2)施肥 (3)买种子 (4)出售 (5)播种
A.3—2—5—1--4
B.5—3—2—1—4
C.3—5—2—1—4
D.4—3—5—1—2