在停止真空除气器工作时,要先停止砂泵运转,再关闭砂泵()蝶阀。
A.排浆口
B.进液口
C.进排液口
D.填料口
参考答案:A
His _____are very ______to us. We all like them.
A.friendly, friendly
B.friends, friendly
C.friend, friendly
D.friendly, friends
股骨大转子高点与骶管裂孔的外1/3与内2/3交界的治疗本病的穴位是:
A.居髎B.环跳C.膝阳关D.昆仑E.委阳