有关两列火车的.两列火车相对开过,一列火车长150米,另一列长200米,150米的火车上的人看200米的火车15秒通过,问,200米的火车上的人看150米的火车多长时间通过?

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• 有关两列火车的.两列火车相对开过,一列火车长150米,另一列长200米,150米的火车上的人看200米的火车15秒通过,问,200米的火车上的人看150米的火车多长时间通过?
• 英语翻译The use of mechanical dictionaries to overcome the barriers of language was first suggested in the 17th century.However,it was not until the 20th century that the first concrete proposals were made,in patents issued independently in 1933 by George Artsrouni,a French-Armenian,and by a Russian,Petr Smirnov- Troyanskii.Artsrouni designed a storage device on paper tape which could be used to find the equivalent of any word in another language; a proto
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