【单选题】【消耗次数：1】
流量控制阀是通过调节阀口的（ ）来改变通过阀口的流量。
①
通流面积
②
形状
③
温度
④
压力差
参考答案：
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相关题目
【单选题】
单向流量控制阀的作用是
①
防止怠速时混合气被吸入曲轴箱内
②
防止高速时混合气被吸入曲轴箱内
③
防止怠速时机油被吸入气缸
④
防止怠速时曲轴箱内气体吸入气缸冲淡混合气
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