题目内容

What do the authors mean by quoting Midwestern farmers’ frequent remark “If you don't like the weather, just wait five minutes”?

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Compared with pre-industrial levels, are there any changes around us? What are they?

在锅炉中，与燃料、烟气相关的设备成为炉。

A. 对
B. 错

在锅炉中，与水、蒸汽光管的设备成为炉。

A. 对
B. 错

汽包属于“锅”设备。

A. 对
B. 错