Match the words (1-8) with the definitions (A-H). 搭配题 1 ___ tilting train 5 ___ curve radius 2 ___ in excess of 6 ___ continuous welded rail 3 ___ dedicated line 7 ___ maximum 4 ___ existing line 8 ___ rate A a track for exclusive use B a track already being used C a measurement D an upper limit E a train that has a special mechanism for curves F a phrase relating to more than a specified amount G a long section of track without joints H a particular speed