圆弧插补用圆心指定指令时，在绝对值编程中I、J、K也应是圆心的绝对坐标值。（ ）
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一个主程序中只能有1个子程序。（ ）
A. 对
B. 错
半径补偿指令可以和G00/G01/G02指令联用。（ ）
A. 对
B. 错
Injection lag can be caused by ____.
A. improper timing of the intake valves
B. setting of the pump plunger
C. compressibility of the fuel
D. position of the needle valve
The time between injection and ignition of the fuel is known as ____.
A. turbulence lag
B. after burning ratio
C. pre-ignition lag
D. ignition delay
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