在相同条件下，蒸发溶液的传热温度差要（）蒸发纯水的传热温度差。
A、大于
B、小于
C、等于
D、无法判断
参考答案：B
---What did the Englishman say?
---Oh, he asked where ____ .
A．did you come form
B．do you come from
C．you came from
D．you did come from
《诗经》
