Reinforced Cement Concrete is made by __________ , in order to create __________ in concrete.

A plain concrete usually has a ___ amount of cement compared to lean concrete. A: higher B: lower C: neither A or B D:

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.

Which of the following is not the reason why concrete needs reinforcement? A: Reinforcement has good tensile resistance, while concrete has good compressive resistance. B: Reinforcement has good compressive resistance as concrete. C: Engineers prefer ductile failure to brittle failure of the members. D: Reinforcement and concrete can work together to increase the bearing capacity of the members.

What is the function of the concrete cover? A: To protect rebar from corrosion. B: To improve the bearing capacity of the member. C: To improve the cohesion force between rebar and concrete. D: To improve the fire resistance of the member

请在下面几个相同含义的句子中，选择出你认为是formal expression的句子： A: There isn’t very much research on the use of oil palm shell as coarse aggregate in the production of concrete B: Little research has been conducted on the use of oil palm shell s coarse aggregate in the production of concrete. C: There isn't plenty of research on the use of oil palm shell as coarse aggregate in the production of concrete. D: There is only a little research on the use of oil palm shell as coarse aggregate in the production of concrete.

It is sometimes easier to illustrate an abstract concept by ( ) with something concrete.

Which of the following is the mostly used type of concrete pavement? A: Jointed plain concrete pavement (JPCP) B: Jointed reinforced concrete pavement (JRCP) C: Continuously reinforced concrete pavement (CRCP) D: Prestressed Concrete Pavements (PCP)

The specific meaning of the terms "reinforced concrete and prestressed concrete" are ______ .

concrete