單項選擇題
A.站臺B.枕木C.道心D.軌面
A.160B.180C.200D.170
A.160B.140C.120D.100
A.100B.110C.120D.90
A.4B.5C.7D.6
A.11B.9C.10D.8
A.1B.1.5C.2D.3
A.4.9B.4.2C.3.6D.2.4
A.60B.50C.40D.80