45.Which of the following descriptions about biofuels is true?
(A) Biofuels can completely replace petroleum soon in the next few decades.
(B) Green chemists hardly have faith in the development of biofuels.
(C) Modern lifestyle depends more on biofuels than on petroleum now.
(D) Biofuels are renewable and produce the least harm to the environment.
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(D)選項是正確的，因為倒數第5行有提到...
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解析： (D) Biofuels ar...
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