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千斤顶久置后，使用前应重新标定。( )
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当采用钢绞线作预应力钢筋时，混凝土强度等级不宜低于C30。( )
两根直径分别为φ14mm和φ16mm的Ⅰ级钢筋，承受相同的拉力作用，则两杆所受的内力相同。( )
当柱子各边纵向钢筋多于三根时，应设置复合箍筋。 ( 、
In an English village not far from London, Oliver and twenty other poor children lived in an orphan’s home. They had their meals in a large stone hall. The boys we re always hungry, because the master gave them only one small plate of soup. The master and his two assistants stood with solemn faces near the table and watched the frightened children. Sometimes Oliver felt so sad and frightened that he want ed to run away. However, the master never gave him a chance of escape. Later, 0liver did leave the home which he had hated. The master of the Orphan’s home was very kind to the children.
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