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The engine tachometer system supplies the engine low pressure rotor (N1) and the engine high pressure rotor (N2) speed signals

A The engine exhaust gas temperature system supplies the engine low pressure rotor (N1) and the engine high pressure rotor (N2) speed signals；

B The engine rotating speed instrument system supplies the engine low pressure rotor (N1) and the engine high pressure rotor (N2) speed signals；

C The engine rotor pressure system supplies the engine low pressure rotor (N1) and the engine high pressure rotor (N2) speed signals；

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正确答案：A （备注：此答案有误）

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