Water is the oldest form of transport.
The original sailing vessels were replaced by steamboats in the early
1800s and by diesel power in the 1920s. A distinction is generally made between
deepwater and navigable inland water transport. Domestic commerce centers on
tile Great Lakes, canals, and navigable rivers. In 1975 water transport accounted for 22.6 percent of total intercity tonnage. Its relative share of intercity tonnage was 31.3 percent in 1947 and 31.7 percent in 1958. Tonnage declined to 27.9 percent in 1965 but increased by 1970 to 28.4 percent. This short-term increase did not stabilize. Market share dropped by 5.8 percent by 1975. Forecasted market share by 1985 is 18.4 percent of total intercity tonnage. The water transport share of revenue has been less than 2 percent of intercity freight revenue since 1955. The exact miles of impro A. Steamboats are the original sailing vessels. B. Steam power followed diesel power. C. Deepwater and navigable inland water transport are equivalents. D. There is domestic commerce in the Atlantic Ocean. 更多"Water is the oldest form of transpo"的相关试题: [单项选择]
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