Besides producing fewer greenhouse gases, a modern turbofan is about 80% quieter...

questão de inglês da banca cespe cebraspe aplicada no concurso anac (2009). confira a resolução completa abaixo:

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Judge the following items about the ideas and the linguistic
structures of the text above.

Besides producing fewer greenhouse gases, a modern turbofan is about 80% quieter than 1960 jets.