The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.<br>A:be affected<br>B:affect<br>C:be effected<br>D:effect

The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.
A:be affected
B:affect
C:be effected
D:effect

出自：海船船员证

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