Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）<br>A:higher speed required<br>B:flywheel-effect<br>C:lower starting temperatures<br>D:higher compression pressures

Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）
A:higher speed required
B:flywheel-effect
C:lower starting temperatures
D:higher compression pressures

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