油罐内油液未淹没过(),使油泵无油可吸,应补充储油。
A、底阀
B、油气储存腔
C、齿轮阀
D、进油阀
参考答案:A
已知一组记录为46,74,53,14,26,38,86,65,27,34,给出采用归并排序法进行排序时每一趟的排序结果。
—How was your climbing on Mount Tai?
—I didn't believe I could do it I got to the top. [ ]
A. until
B. unless
C. after
D. when