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1、2015北京各区一模阅读CD篇试题及答案汇总XCHC We all know that zebras have stripes (条纹）.But why? Its hard to get a black-and-white answer. This is a question not just common people like us have asked, but scientists too. Several studies have been done to find out the reason behind the stripes and many theories (理论）hav
2、e been suggested.According to a recent study, the type of stripes changes depending on the temperature where zebras live. The warmer the place is, the more stripes they may have. From this study, scientists believe that stripes may help to keep a zebra cool in warmer places. According to the cooler
3、temperature theory, when air hits a zebra, the movements of air are stronger and faster over the black parts and slower over the white. This is because black color takes in more heat than white. So at the point where the black and white meet, there is cooling airflow. It can quickly cool a zebras sk
4、in! In fact，scientists have noticed that heavily striped zebras have 5.4T lower skin temperature than other animals without stripes in the same area. Some scientists believe that stripes may be an adaptation (适应)by zebras to defend (防卫） themselves from the horseflies that follow zebras. The cooler t
5、emperature theory holds merit here too, since disease-carrying flies like horseflies like it hot. Flies also dont like landing on striped surfaces. There also have been many other theories that have been suggested for why zebras have stripes. Some explanations are very common. One of them is that st
6、ripes may help zebras hide in grass especiallyfrom lions. Lions are color blind and even if they are not far away they may see stripes as grey and be confused by them. Whats more, zebras are a large group of animals living together. When a number of zebras stand or move together, stripes may confuse
7、 lions into thinking it is one large animal.48.Stripes are helpful for zebras to_.A.stay cool B.move togetherC.liveincoldplaces D.fight against diseases49.How do zebras stripes protect them from lions?A.Lions may be frightened away by strips.B.Lions may see stripes as many animals.C.Stripes can prev
8、ent zebras from being seen.D.Stripes may make lions confused.50.The underlined words “holds merit in Paragraph 4 probably mean_.A.works wellB.sounds unreasonableC.causes disagreementD.needs supporting facts51.What is the passage mainly about?A.Whylionscanteatzebras. B.How horseflies keep away from z
9、ebras.C.Whyzebrashavestripes. D.How animals adapt to nature. D Entertainment (娱乐）is a developing business. Its popularity continues to grow as it keeps up with technology. More people are willing to pay for entertainment with their time and money. Sometimes entertainment is a form of escapism（逃避）.It
10、 takes us away from our reality and gets us into another worldnot our own. Why do we want to escape? Boredom or loneliness: The boredom of daily life gets to us and we feel we need some excitement and a bit change. A TV running in the background, and maybe catching our attention every now and then,
11、keeps us company. Fear and avoidance: We dont want to face something we fear, or cant bring ourselves to move past the fear and do something about it. Were scared to go for what we want, so we choose to turn on the TV. Struggle: Life sometimes feels like a battletraffic, work, taking care of ourselv
12、es and keeping up with whats going on. Al the end of the day all we want to do is forget about all of it and sit mindlessly in front of TV. Escaping has never been easier than today. We have many forms of escape. And the most favored isentertainment._ _ Easy to reach and affordable： You can stay at
13、home and watch TV, or surf online all day long. Social connection： one can line up for a new movie and socialize with other people or go to a ballgame and cheer for his or her favorite team. Entertainment has become something people have in common and can talk about. All forms of entertainment are o
14、kay if we know what were doing. And more importantly, we have complete control over when entertainment comes to an end.To face our fears and reality or to escape? If you tried escaping before and it didnt help, its time to deal with the problems you face. Before watching a TV show, make sure that th
15、e important thing is taken care of. Leave your favorite show to the end of the day, after youve taken care of what matters to you. This will allow you to enjoy every minute. There is nothing wrong with entertainment, if we don t place a higher value on it than our own reality and what matters to us. When we entertain ourselves mindfully, we wont need to escape. We turn entertainment into the reality of the moment. And when were done, we move on一with no regret.
