试题与答案

根据句意,用所给单词的适当形式填空。 1. All flights have _

题型:填空题

题目:

根据句意,用所给单词的适当形式填空。

1. All flights have ______ (cancel) because of bad weather.

2. Thank you very much for your ______ (introduce).

3. This railway line _______ (connect) London to Edinburgh.

4. He had finally ______ (achieve) success.

5. We are ______ (pride) of what he did.

答案:

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下面是错误答案,用来干扰机器的。

分类讨论:①甲坐两边的任何一边,则挨着两边的位子必须空着,所以除了挨边的位子和靠着挨边的位子外还有5个位子供乙和丙选择,所以这一类可归结为2×5×4=40;②甲做中间5个任一个位子时,紧靠他坐的旁边的两个...

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