66. B细节理解题。根据最后一段倒数第一、二句“The focus on fitness is as much about science and the future as is about keeping any individual astronaut healthy…NASA is worried about two things :… and, more importantly, how maintain strength and fitness…”可知美国国家宇航局对宇航员主要的担心之一是如何在太空长久地保持健康。故选B项。

　　【名师点睛】科普类历来是高考阅读理解命题的重点文章逻辑性强，条理清楚，主要考查学生对语篇的整体把握和领悟能力以及对特定细节的认读和处理能力。3. 在进行推理判断时，考生一定要以阅读材料所提供的科学事实为依据，同时所得出的结论还应符合基本的科普常识。

　　6.【2015·北京卷】A

　　The Boy Made It!

　　One Sunday, Nicholas, a teenager, went skiing at Sugarloaf Mountain in Maine. In the early afternoon, when he was planning to go home, a fierce snowstorm swept into the area. Unable to see far, he accidentally turned off the path. Before he knew it, Nicholas was lost, all alone! He didn’t have food, water, a phone, or other supplies. He was getting colder by the minute.

　　Nicholas had no idea where he was. He tried not to panic. He thought about all the survival shows he had watched on TV. It was time to put the tips he had learned to use.

　　He decided to stop skiing. There was a better chance of someone finding him if he stayed put. The first thing he did was to find shelter form the freezing wind and snow. If he didn’t, his body temperature would get very low, which could quickly kill him.

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