A. The amount and flow of traffic influences the construction method of box girder bridges.
B. Bridge-building materials and methods have evolved with traffic and mass transit needs.
C. Steel girder bridges may also be cast in place using falsework supports removed after completion.
我的答案: 无
A. The amount and flow of traffic influences the construction method of box girder bridges.
B. Bridge-building materials and methods have evolved with traffic and mass transit needs.
C. Steel girder bridges may also be cast in place using falsework supports removed after completion.
我的答案: 无