答案：B　推理判断题。根据文章最后两段内容可知，男主人所说的“Don't hope, friend... decide！”给了作者极大的震撼和鼓励，让作者明白了“希望”与“决定”之间的不同，决定今后给予家人更多的关爱。故答案选B。

　　科普知识（阅读理解）由 (2017安徽“江南十校”高三联考)US scientists have fixed experimental sensors (传感器) in some cities to map wind patterns and provide possible lifesaving information in a chemical or biological attack.

　　Two test models,in the form of nine-meter high aluminum (铝) towers,are now undergoing testing in New York City,one in Greenwich Village and the other near Times Square.

　　Half a dozen similar sensors have been fixed in and around Washington.

　　Simulations (模仿) of terrorist attacks carried out since the Sep.11,2001 attacks have stressed the importance of finding out as soon as possible those areas that would be most affected by giving out poisonous gas or radioactive material into the air.

　　Now,the only reliable sources of information on wind speeds and direction are major airports,which are generally located too far away from city centers to be of much use.

　　The experimental sensors measure wind strength and direction 10 times per second.The information is downloaded through the Internet to computers that can turn out a detailed wind map,updated every 15 minutes.

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