|
考点·考向·考法 综合练(十五) 限时：30分钟 阅读(2篇)＋短文改错(2篇) Ⅰ.阅读理解 A (2015·湖南省湖中名校联考)Long-time exposure to air pollution can lead to physical changes in the brain and cause trouble in learning and memory, and even anxiety. This is suggested by the results of new research on mice. While other studies have shown the harmful effects of polluted air on the lungs and heart, this is the first to show the negative effect on the brain. The team of Laura Fonken, Randy Nelson, from the Ohio State University, U．S.A., has spread to the brain a previous line of research which found that fine particulate (微粒) matter floating in the air mainly because of air pollution caused by humans, causes swelling in much of the body, and may be related to high blood pressure problems, and some other diseases. In the research Fonken and his colleagues exposed mice to polluted air for six hours each day, five days a week, over a period of 10 months, almost half the average life length of mice. Polluted air contains fine particles created by cars, factories and natural dust. Fine particles of this kind are tiny, about 2.5 micrometers in diameter, or about one-thirtieth the width of a human hair. These particles can go deep into lungs and other organs. | 
