Under a certain long-term load, concrete would creep. In the reinforced concrete axial compressive members: A: Creep increases the compressive stress of concrete. B: The compressive stress of concrete and steel bar keeps unchanged. C: Creep decreases the compressive stress of concrete and increases the compressive stress of steel bar. D: Creep increases the compressive stress of concrete and decreases the compressive stress of steel bar.

In the calculation of the bearing capacity of the normal section of a T-shaped reinforced concrete beam, it is assumed that ( ) within the effective width of the compressed flange. A: the compressive stress is uniformly distributed B: the compressive stress is distributed in a parabolic shape C: the compressive stress is distributed in a triangle shape D: the compressive stress is distributed partly uniformly and partly non-uniformly

The larger the size of the cube specimen, the higher the compressive strength.

Concrete is basically a compressive material and has good tensile strength.

Thepistonsupportingbodyismainlysubjectedto（）stress. A: pushing B: centrifugal C: stretch D: compressive

The larger the size of the cube specimen, the higher the compressive strength. A: 正确 B: 错误

In the calculation of the bearing capacity of the normal section of a doubly reinforced concrete rectangular beam, if [img=63x27]1803b9532781df8.png[/img], it indicates that ( ). A: the compressive reinforcements will not yield B: the tensile reinforcements will not yield C: the section is over-sized D: the compressive reinforcements have already yielded when the failure of the beam occurs

For concrete specimen subjected to uniaxial compression, the stress reaches the maximum when the strain reaches the ultimate compressive strain.

The compressive strength of brittle materials is generally （ ） than its tensile strength.。 A: higher B: equal C: lower

Gray cast iron has () A: high compressive strength B: excellent machinability C: good casting characteristic D: all of these