配制自密实混凝土,当采用天然砂时,含泥量及泥块含量不宜大于3%。
参考答案:错
证券市场的基本功能之一是为( )决定价格。
A.资产
B.商品
C.资本
D.上市公司
In the stowage of deck cargo, cribbing is().
A.placed on deck to support the cargo
B.separation pieces used to keep cylinders upright and steady
C.shims for stowing balded cargo
D.nets placed across the hatch opening to keep the cargo from falling in the hatch