大學英語四級閲讀《比較題》單選題講解
A rapid means of long-distance transportation became a necessity for the United States as settlement spread over farther westward. The early trains were impractical curiosities,and for a long time the railroad companies met with troublesome mechanical problems. The most serious ones were the construction of rails able to bear the loadand the development of a safe,effective stopping system. Once these were solved?the railroad was established as the best means of land transportation. By I860 there were thousands of miles of railroads crossing the eastern mountain ranges and reaching westward to the Mississippi. There were also regional southern and western lines.
The major problems with Americans 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
講解答案:
本題問的.是19世紀中葉美國鐵路系統存在的問題。作者在第一段第三句中指出,當時最嚴重的技術問題是the construction of rails able to bear the road和the development of a safe,effective stopping system,所以答案為A。這個問題與該句的比較考點相聯繫The most serious ones。
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