C220单板类型（）？
A.主控板
B.上联板
C.用户板
D.背板
参考答案：A, B, C, D
Mr. Green asked Lily ________ she had written to her father _______.
A．whether; the day before
B．whether; yesterday
C．that; the day before
D．that; yesterday
下列哪些分项工程是属于细部子分部工程（）。
A.窗帘盒
B.花饰制作与安装
C.细部构造
D.护栏制作与安装
