数字万用表测量电阻方法：按下电源开关，将笔插入COM插孔，笔插入“Ω”字样的插孔，将量程开关拨至合适的档位,将两表笔，检测万用表本身是否接触良好,显示数值为正常

A. rbine.and a high–pressure turbine.
B. A fan. a low–pressure compressor low–pressure turbine,and a high–pressure turbine.
C. A fan. a low–pressure compressor and a low–pressure turbine.
D. A low–pressure compressor and a low–pressure turbine

A fan. a low–pressure compressor high–pressure compressor, a low–pressure turbine and a high–pressure turbine.
B. A low–pressure compressor high–pressure compressor. a low–pressure turbine and a high–pressure turbine.
C. A high–pressure compressor. a low–pressure turbine and a high–pressure
D. A high–pressure compressor and a high–pressure turbine