蒸发指的是将（）物质的稀溶液加热沸腾，使部分溶剂汽化，以提高溶液的浓度的单元操作。
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CRH380A统型动车组设有多少个相对独立的动力单元？
FCA和FAS一样，都可以由进口方办理货物的出口手续。
A. 正确
B. 错误
A:Oh. But why didn't he just own up and tell someone? B:（）
A. So be careful with our job
B. He was too scared that he would be fired, I suppose
C. You should have told him that earlier
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