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单选题
燃用劣质燃油,对喷油设备相应采取下列措施()。
A
喷油提前角适当减速叫,启阀压力适当减小
B
喷油提前角适当增大,启阀压力适当减小
C
喷油提前角适当减小,启阀压力适当增大
D
喷油提前角适当增大,启阀压力造当增大
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