下载APP
举一反三
【单选题】In the last two hundred years there have been great changes in the method of production of goods. This is now also true of the building industry; for mechanization has been introduced. System building...
A.
the latter uses ready-made internal features
B.
panels are cast in a level position
C.
the former is used to build walls and floors while the latter to construct bathrooms or bedrooms
D.
the former is more expensive than the latter
【单选题】被连接件受横向外力作用，若采用一组普通螺栓连接时，则靠（ ）来传递外力。
A.
被连接件结合面间的摩擦力
B.
螺栓的拉伸和挤压
C.
螺栓的剪切和挤压
D.
螺栓的剪切和被连接件的挤压