美国内战前与俄国1861年改革前经济发展面临的共同障碍是 [ ]
A、资金不足
B、企业设备落后
C、缺乏技术人才
D、缺乏自由的雇佣劳动力
答案：D
If she that Mary would come to see her, she would never have gone to the party.
A．had known
B．knew
C．knows
D．would know
建设创新型国家，关键在( )。
A．人才
B．技术
C．对外开放
D．体制创新
