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These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
A．would have been unthinkable B．would not be unthinkable
C．would be unthinkable D．would not have been unthinkable
查看习题详情和答案>>These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
A．would have been unthinkable B．would not be unthinkable
C．would be unthinkable D．would not have been unthinkable
查看习题详情和答案>>These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
A．would have been unthinkable B．would not be unthinkable
C．would be unthinkable D．would not have been unthinkable
查看习题详情和答案>>