“三农”作为一个概念由经济学家温铁军博士于（）年正式提出，自此渐渐被媒体和官方广泛引用。
A、1996
B、1993
C、1999
参考答案：A
The train _____ she was traveling was five minutes late. [ ]
A. that
B. on that
C. by which
D. on which
有下列程序：
程序最后打印结果是______。
A．aaaa bbbb
B．aaaa bbbb
C．bbbb bbbb
D．bbbb aaaa
