提升装置的卷筒、天轮、主导轮、导向轮的最小直径与钢丝绳中最粗钢丝的最大直径之比,凿井期间升降物料的绞车或悬挂水泵、吊盘用的提升装置不小于
A
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Whataretheparagraphqualities?
ThelongestriverinCanadais________.
Theboycomplained_______apaininhisstomach.
Duringthe1990smanyAustralianscalledfortheirnationtobecomearepublicwith________.
Tounderstandthesentence,youshouldanalyzeitsparts________.
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