水泥砂浆抹带接口施工,抹带完成后,应立即用平软材料覆盖,( )h后洒水养护。
A.3~6B.2~4C.3~5D.3~4
参考答案:D
He is tearing up what he has written ________and beginning over again. [ ]
A. simply
B. constantly
C. gradually
D. generally
强心苷引起的房室传导阻滞最好选用()
A.异丙肾上腺素
B.氯化钾
C.肾上腺素
D.阿托品
E.苯妥英钠