单选题
Turbine engine tachometers usually measure speed as a percentage of the maximum speed of the turbine(s), unless specifically referred to the propeller.
A
涡轮发动机转速表通常用涡轮最大速度的百分比来测量速度,特别是螺旋桨。
B
涡轮发动机转速表通常用涡轮(或者特指螺旋桨)的最大速度的百分比来测量速度。
C
除非特指涡轮螺旋桨发动机,涡轮发动机转速表通常用涡轮最大转速的百分数来表示发动机转速。
答案解析
正确答案:C
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