单选题Continuous surging of turbocharger can be caused by（） ①crash stop of engine ②increased back pressure after T-Ch ③fouled or damaged turbine nozzle ringAall are correctB②and③are correctCnone of the above is correctD①only is correct
单选题
Continuous surging of turbocharger can be caused by（） ①crash stop of engine ②increased back pressure after T-Ch ③fouled or damaged turbine nozzle ring
A
all are correct
B
②and③are correct
C
none of the above is correct
D
①only is correct
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