常用的塑性判断依据是( )。 A: Elongation after fracture and section shrinkage B: Plastic and toughness C: Section shrinkage and plasticity D: Thermal expansion

To avoid cracking of the casting, there should be ____________ for shrinkage during solidification

Israel and Jordan announced that they would sponsor a project to prevent the shrinkage of the Dead Sea during the United Nations World Summit on Sustainable Development earlier this month in Johannesburg, South Africa.

坯体烧结后,在宏观上会出现哪些典型变化:() A: Volume<br/>Shrinkage B: Densification C: Strength<br/>Enhancement D: Toughness<br/>Improvement

The phenomenon of shrinkage and swelling of wood occurs in A: below fiber saturation point. B: above fiber saturation point. C: above or below the fiber saturation point. D: no correlation with fiber saturation point.

The main function of the distributing bars in a reinforced concrete cast-in-place slab including the following aspects except for ( ). A: undertaking the bending moment B: uniformly transfer the load from the slab to the stressed reinforcements C: forming a steel mesh to fix the stressed reinforcements D: resisting the temperature stress and the shrinkage stress