I think ___ trains are faster than ___ buses.A ./ ; / B.the;/ C ./;the D.the;a

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I think ___ trains are faster than ___ buses.A ./ ; / B.the;/ C ./;the D.the;a

A 都不是特指 哪一辆比哪一辆快 而是泛指火车比汽车快

A ./ ; /
复数形式,表示类别

答案:无需冠词
类指无需冠词the,特指时候才用。
复数,直接排除a