单选题：33. According to Paragraph 4, smart windowsare the windows t

题目内容：

33. According to Paragraph 4, smart windowsare the windows that A．are coated.
B．are glazed.
C．have several layers.
D．can change color.

参考答案：

答案解析：

30. In a binary plant, the heat of the geothermalwater can b

30. In a binary plant, the heat of the geothermalwater can be converted into____

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11. Weare aware of the potential problems.A．global B．possible C．ongoing D．centr

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分类：理工类题型：单选题