进气提前角
参考答案：从进气门打开到活塞处于上止点时，曲轴转过的角度
Production at the factory was ______ for as long as 10 hours because the electricity supply was cut off.
A．disturbed
B．bothered
C．interrupted
D．unloaded
薏苡仁来源于
A．蓼科
B．豆科
C．禾本科
D．莎草科
E．棕榈科
