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参考答案：
参考解析：
刷刷题刷刷变学霸
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】剖面线12L表示该部件中心在：（）.
A.
距离机身结构对称中心线右边12英寸的位置
B.
距离机身结构水平基准面右边12英寸的位置
C.
距离机身结构对称中心线左边12英寸的位置
D.
距离机身结构水平基准面左边12英寸的位置