【单选题】【消耗次数：1】
为了改变进入液压执行元件的流量，可采用变量液压泵来供油，也可采用定量泵和流量控制阀，以改变通过流量阀流量的方法。该说法（ ）
①
正确
②
错误
参考答案：
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相关题目
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单向流量控制阀的作用是
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防止怠速时混合气被吸入曲轴箱内
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防止高速时混合气被吸入曲轴箱内
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防止怠速时机油被吸入气缸
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防止怠速时曲轴箱内气体吸入气缸冲淡混合气
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