Which of the following pairs of terms does the author regard as most nearly synonymous？A．S
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Which of the following pairs of terms does the author regard as most nearly synonymous？
A．Solar and extraterrestrial.
B．Photovoltaic devices and solar cells.
C．Crystalline silicon and amorphous materials.
D．Amorphous materials and higher efficiencies.
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正确答案：B
解析：在第一段开头作者提到，The basic problem with the use of solar photovoltaic devices is economics(就使用太阳能光电设备而言，其基本问题是经济问题)。在下文多次用solar cells(太阳能电池)替代photovoltaic devices(光电设备)，因此可以判断photovoltaic devices和solar cells是同义词。