问题描述：
[单选]
With（）unit the timing of fuel injection of an engine can be regulated automatically．
A．MBT
B．MEG
C．VSG
D．VIT
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答案解析：无
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答案解析：无
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上一篇：With four-stroke engines， it takes four revolutions of the crank shaft to make（）power stroke（s）．
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