【单选题】The complete stress-strain curve of a material from the beginning of being loaded to the final rupture is shown in the following figure, the deformation process of the material is not _____.
【单选题】As shown in the figure, there is a gap of depth of h/2in the tensile rod with rectangular cross-section. Compared with the complete rod without gap, the maximum stress of the one with gap is.
【简答题】A.It would have a bad effect on the local people. B.The local people do not want to sell any land. C.The government doesn't allow land to be sold. D.There isn't enough money available to buy land.