【单选题】【消耗次数：1】
燃油压力调节器的主要功能是使哪两部分压力的差值保持不变
①
燃油分配管和大气环境
②
燃油分配管和进气歧管
③
油泵和环境
④
油泵和进气歧管
参考答案：
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7、进行燃油压力检测时,按正确的工序应该首先( )。
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