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  3. According to the author, applying biotechnology to industry One advantage of the biofuels is that

According to the author, applying biotechnology to industry One advantage of the biofuels is that

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问题 According to the author, applying biotechnology to industry
One advantage of the biofuels is that
选项 A、they will not pollute the environment.
B、they are degradable by bacteria.
C、they are cheaper than hydrogen fuels.
D、they are suitable for internal-combustion engine.
答案D
解析 本题问生物燃料的一个优点是什么。第四段倒数第一、第二句提到生物燃料适用于在用的汽车内燃机。所以"它们适合内燃机"正确。不污染环境：过于绝对。根据第三段倒数第二句可知，生物燃料对环境还有少许污染。它们能被细菌降解：第三段中"Bioplastics are biodegradable…"说的是生物塑料而不是生物燃料。它们比氢燃料便宜：文章中只说它甚至比氢燃料更干净，至于是否比氢燃料便宜不得而知。
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