阿摩線上測驗
20. The discharge ________ in the fuel ejection system could ensure that the residual pressure is maintained in the high-pressure fuel line between injections.
(A)needle valve
(B)check valve
(C)stop valve
(D)safety valve
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統計： A(4), B(11), C(2), D(3), E(0) #4054423
統計： A(4), B(11), C(2), D(3), E(0) #4054423
