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[主观题]

Which of the following is an economical measure for energy conservation？A．Investing in new

Which of the following is an economical measure for energy conservation？

A．Investing in new forms of facilities.

B．Making more efficient refrigerators.

C．Requiring white roofs for buildings.

D．Toughening fuel economy standards.

提问人：网友lixinglong 发布时间：2022-01-07

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