【单选题】Most people believe that the governmental departments should give ______ service at minimumcost.
【单选题】当截面尺寸、配筋、材料强度等级、 σpeII及σl相同时,对先张法、后张法预应力轴心受拉构件,张拉控制应力σcon( )。
【简答题】常用的轧辊材料有合金锻钢,(),和铸铁。
【单选题】The author ______.
A.
believe that most people are superstitious
B.
believe that very few people are superstitious
C.
believes that there are still some evidences of superstitions in what we say and what we do
【单选题】与《共同纲领》相比,1954年《中华人民共和国宪法》的新特点是
【简答题】型钢轧机轧辊常用的材料有钢轧辊和__________。