39. 汽油噴射引擎當進行燃油壓力測試時，包括下列哪些步驟？
(A)relieve the fuel pressure
(B)disconnect the quick-conn ect fitting and attach the fuel pressure gauge
(C)open the fuel tank filler cap
(D)read the fuel pressure gauge。

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統計： A(30), B(28), C(12), D(26), E(0) #1163474