A-A+
A clearly visible beneath of RT-flex engines is their operation at all ship speedsThis is
问题详情
A clearly visible beneath of RT-flex engines is their operation at all ship speedsThis is achieved by the superior combustion performance.
A.shockless
B.smokeless
C.no vibration
D.noiseless
请帮忙给出正确答案和分析,谢谢!