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Biotechnology is expected to bring important advances in medical diagnosis and therapy, in solving food problems, in energy savi

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问题     Biotechnology is expected to bring important advances in medical diagnosis and therapy, in solving food problems, in energy saving, in environmentally compatible industrial and agricultural production, and in specially targeted environmental protection projects. Genetically altered microorganisms can break down a wide range of pollutants by being used, for example, in bio-filters and wastewater-treatment facilities, and in the clean-up of polluted sites. Genetically modified organisms can also alleviate environmental burdens by reducing the need for pesticides, fertilizers, and medications.
    Sustainability, as a strategic aim, involves optimizing the interactions between nature, society, and the economy, in accordance with ecological criteria. Political leaders and scientists alike face the challenge of recognizing interrelationships and interactions between ecological, economic and social factors and taking account of these factors when seeking solution strategies. To meet this challenge , decision-makers require interdisciplinary approaches and strategies that cut across political lines. Environmental discussions must become more objective, and this includes, especially, debates about the risks of new technologies, which are often ideologically charged. In light of the complex issues involved in sustainable development, we need clearer standards for orienting and assessing our environmental policies.
    Sustainable development can succeed only if all areas of the political sector, of society, and of science accept the concept and work together to implement it. A common basic understanding of environmental ethics is needed to ensure that protection of the natural foundation of life becomes a major consideration in all political and individual action. A dialogue among representatives of all sectors of society is needed if appropriate environmental policies are to be devised and implemented.
When he says approaches and strategies that cut across political lines, the author means that they______.
选项 A、involve economic issues
B、observe ecological criteria
C、are politically significant
D、overcome political barriers
答案D
解析 前文讲到Political leaders and scientists alike要了解各自之间的相互联系与相互作用，并在制定策略时考虑到这些因素，这样他们就需要cut across political lines，可以推断这里的political lines最有可能的意思是“政治屏障”。
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