Question
11 to 20 are based on this passage
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Question 11
The passage is primarily concerned with
A. the construction of modern steel bridges called box girder bridges
B. box girder bridge construction methods where access to construction is limited
C. how the box girder bridge is related to segmental bridges, such as trestles
D. why the plate girder bridge is considered the ancestor of the box girder bridge
E. the fabrication and construction methods of the box girder bridge
我的答案： 无