【单选题】单击“格式刷”按钮 可以进行( )操作。
【单选题】单击“格式刷” 按钮 可以进行____操作。
【判断题】无论是正外部性还是负外部性,两者都破坏了市场应有的效率,降低了社会总效用,扭曲了成本-效益原则,对市场经济的正常运行都是不利的。
【判断题】无论是正外部性还是负外部性,两者都破坏了市场应有的效率,降低了社会总效用,扭曲了成本-效益原则,对市场经济的正常运行都是不利的。
【单选题】What worried the child most was _____________ to visit his mother in the hospital. [ ]
【单选题】What worried the child most was ____to visit his mother in the hospital .
D.
having not been allowed
【单选题】What upset the child was______ to visit his mother in the hospital.