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A、Toimprovetransportationinthecountryside.
B、Tomovetroopsquicklyfromplacetoplace.
C、Toenablepeopletotravelatahigherspeed.
D、Tospeedupthetransportationofgoods.
发布时间：2025-11-14 21:33:55
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答案：To move troops quickly from place to place.
