在忽必烈的支持下，元朝廷开创了凑够江浙闽沿海到渤海直沽口岸的海上粮食运输线。
参考答案：对
-----Hi, Nancy, I didn’t know you had come back. So have you graduated from college?
---- Yes. I _____ French for 5 years in Nanjing.
A．have studied
B．studied
C．had studied
D．am studying
根据通货膨胀理论，假如通货膨胀的初始原因是成本推动，如果没有______ 的伴随，将会出现生产萎缩，失业增加，最终引起严重的经济萧条。
A．需求增长
B．需求减少
C．供给增长
D．供给减少
