题目

According to Dr. John Swaddle, a professor at the Institute for Integrative Conservation at William & amp; Mary hundreds of millions of birds die every year from window collisions (碰撞).However, if you put decals (贴花纸) or colorful stickers outside of your windows, the birds are more likely to see the barrier and therefore avoid it. Remember: never inside your window; always outside of your window."Double-glazed (双层的) windows reflect a lot of light, especially when you view them from a slight angle, as a flying bird would do,"Swaddle told Salon. He is the corresponding author of a recent study which tries to figure out how this basic reality of physics impacts on a bird's experience as it flies near a standard window. For their experiment, researchers had birds perform repeated and controlled flight trials near windows with film (薄膜) products, BirdShades film and Haverkamp film, respectively."In our collision avoidance trials, BirdShades increased window avoidance by 47% and the Haverkamp increased avoidance by 39%. But neither product was effective when the films were applied to the internal surface of windows," the authors concluded.When breaking down the problem of avoiding window collisions from a bird's point of view, Swaddle explained, "The light and reflected imagery from the external surface of the glass is sufficient toobscure a film or decal that is stuck to the inner surface from being seen clearly."If you want to protect birds from easily avoidable deaths without buying window film products, there are other solutions. Swaddle recommended "pleasing fritted glass that could be used in new construction and which is also bird-friendly". Besides, he notes that screens can be helpful as well, not only by limiting reflectiveness but by providing birds with a cushion if they make impact. It is also possible to use everyday household objects to signal to birds that there are barriers—netting, bits of string, colorful stickers, and paint. These can all be used to this effect. （1） What can we do to reduce bird window collisions? A . Decorating the inside of windows with decals. B . Applying stickers to the outside of windows. C . Selecting windows with two layers of glass. D . Keeping windows closed at night. （2） What are the researchers trying to figure out in their experiments? A . The effective ways to avoid collisions. B . The eco-friendly glass and films designed for birds. C . The relationship between light bounce and bird window collisions. D . The responses of birds when they suddenly hitting the shiny windows. （3） Which of the following can replace the underlined word "obscure" in Paragraph 5? A . Apply. B . Shade. C . Preserve. D . Discover. （4） What could we learn from the last paragraph? A . Solutions to prevent birds from hitting windows. B . Methods to lower the cost of windows. C . Eco-friendly glass materials. D . Bird-attracting objects. 答案： B C B A

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