United States.
36. The major problems with
America’s railroad system in the mid 19th century lay in _____.
(A) poor quality rails and unreliable stopping systems
(B) lack of financial support for development
(C) limited railroad lines
(D) lack of a transcontinental railroad
转贴于：CET-4考试_考试大【责编:daiy 纠错】
[1] [2] [3]
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