单项选择题
A.pumped speed；came out
B.pumping rate；overflowed
C.flowing rate；leaked out
D.flowed speed；spilled out
单项选择题 Worn out ring grooves should be （） to standard dimension after being welded.
单项选择题 With VIT unit the timing of fuel injection of an engine can be regulated automatically according to the （）.
单项选择题 With VIT the start of injection may be （） as the engine load is reduced within a certain range.