活塞裙部的结构有何特点?
参考答案:
活塞裙部预先加工成椭圆形状,椭圆的长轴方向与销座垂直,短轴方向沿轴座方向,同时活塞裙部预先加工成上小下大的锥形、梯形或桶形
— How do you find your new classmates?
— Most of them are kind, but _____ is so good to me as Bruce. [ ]
A. none
B. no one
C. every one
D. some one
回弹法测区的选择应符合()
A.在构件边缘选取
B.相邻测区间距在2.0mm之间
C.不宜选在浇筑面上
D.宜选在配筋区