【单选题】【消耗次数:1】
液压泵是容易产生气穴现象的主要元件。该说法( )
正确
错误
参考答案:
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①  正确
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【单选题】 液压泵是将( )转换为( )的装置。
①  机械能,液压能
②  液压能,机械能
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①  正确
②  错误
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