题目内容
根据句意用括号中所给的单词的适当形式填空。
The abacus is one of the first ________ machine which is fast and accurate.(calculate)
答案:calculating
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题目内容
根据句意用括号中所给的单词的适当形式填空。
The abacus is one of the first ________ machine which is fast and accurate.(calculate)