中国古代政府明确规定重农抑商政策开始于（）
A.商朝时期
B.西周时期
C.战国时期
D.西汉时期
参考答案：C
某工程双代号网络计划如下图所示，其关键线路有（）条。
A．1
B．2
C．3
D．4
His suggestion was that we early tomorrow moming. [ ]
A. are to leave
B. leave
C. were to leave
D. would leave
