The most useful and usual type of trains are steam trains._精华吧

The most useful and usual type of trains are steam trains.

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The most useful and usual type of trains are steam trains.

A.正确

B.错误

正确答案：错误

Tag：中外铁路文化之旅时间：2022-01-14 21:30:17

上一篇：Electric locomotive is powered by electricity mainly in one of two ways: electric traction motors or through a third rail.
下一篇：Freight trains are very efficient, with economy of scale and high energy efficiency.

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