整机连续空负荷运转的时间应符合(),其运转过程不应发生故障和停机现象。
A、2h
B、3h
C、4h
D、5h
参考答案:C
A.The victory over one’s fellow runners.
B.The victory over former winners.
C.The victory of will-power over fatigue.
D.The victory of one’s physical strength.
种子标准化就是实行()和()标准化。