【正文】 raph 2 refer to? A.The sunset.B.Red light.C.Blue light.D.Water.（4）What can we learn about from the text? A.Storm clouds are made of water droplets and green light.B.Water can reflect red light as well as blue light.C.There are only red and orange lights in the sunsets.D.If you see a green sky, there will be a tornado.【答案】 （1）B（2）C（3）A（4）B 【解析】【分析】本文是一篇說明文，科學家發(fā)現天空呈現綠色并不是產生龍卷風的云層所獨有的，有時它們會導致大量降雨，甚至冰雹，待在室內或許是最好的選擇。 （1）考查主旨大意。通讀全文，根據第一段中的“there39。s a mon piece of celestial （天上的）fortunetelling that green skies mean a tornado is on its way.”和最后一段中的“Still, none of the conditions that can turn skies green are unique to the clouds that produce tornadoes. Sometimes they just lead to lots of rain, and maybe some hail.”可知，本文主要話題是關注綠色的天空是否意味著即將來臨的龍卷風展開的，故選B。 （2）考查細節(jié)理解。根據第二段中的“Daytime skies are blue because blue shorter wavelengths of visible light tend to bounce off （反 射）air molecules better than red longer wavelength light.”可知，白天天空是藍色,因為藍色短的波長的可見光會反射空氣分子比紅色的長波長光。故選C。 （3）考查代詞指代。根據第二段中的“The sunset might look exclusively （獨有的）red and orange, but there39。s still some green and even blue light hidden in there, just far less than the other colors.”可知，選A。 （4）考查推理判斷。根據第三段中的“But for us to notice the remaining green light, it needs to hit something that reflects green light much better than red. That39。s where water es in.”可知，水既能反射藍光，也能反射紅光，故選B。 【點評】本題考點涉及細節(jié)理解，代詞指代，推理判斷和主旨大意四個題型的考查，是一篇科普類閱讀，要求考生在捕捉細節(jié)信息的基礎上，進一步根據上下文的邏輯關系，進行分析，推理，概括和歸納，從而選出正確答案。3．犇犇閱讀理解 Scientists have found what they believe are pieces of a meteor(流星)that fell to the earth last year. The objects were discovered off the coast of the United States in the Pacific Ocean. The crew of the Nautilus, a private research ship, recovered the rock particles(顆粒).The Nautilus is operated by the Ocean Exploration Trust. The group says its aim at present is to examine areas of the ocean that have never been explored before. The search was launched after US government weather stations observed a large meteorite exploding some months ago. The explosion lit up the sky and sent the rock particles to the earth. The meteorite fall was the largest recorded over the United States in at least 20years. The team includes scientists from NASA, the Olympic Coast National Marine Sanctuary and the University of Washington. The scientists examined what they believe were two small meteorite fragments. Further testing is needed before they can confirm that the material came from the explosion. The Nautilus is equipped with two remotely operated vehicles(ROVs), called Hercules and Argus. These robotic submarines help researchers find and collect materials from the seafloor. The fact that the particles landed in the ocean, instead of on land, means larger pieces may have survived and can be studied. For this reason, scientists decided to launch the first intentional search for meteorites from the ocean. Until the latest research, scientists had only accidentally discovered a small number of meteorites from drilling operations. The objects recovered from the bottom of the sea likely came from the recent explosion for two main reasons. First, meteorite particles are basically made of glassy materials that do not tend to last long in seawater. Secondly, they came from what looked like a small hole on the seafloor. Some evidence shows that they came from something that fell.（1）What is the current goal of the crew of the Ocean Exploration Trust? A.To recover the rock particles.B.To observe movements of the universe.C.To study unexplored places of the ocean.D.To examine creatures of the explored ocean.（2）What mainly caused the start of the search in the sea? A.A huge meteor shower.B.Business value of meteors.C.Plenty of natural resources.D.The brainstorm of researchers.（3）Why do the scientists prefer to search for meteors in the ocean? A.They can find meteors more easily.B.They may find bigger rock particles.C.They like to explore strange sea areas.D.They have better submarine equipment.（4）What does the author intend to do in the last paragraph? A.Offer clues for the search.B.Give reasons to support a guess.C.Stress the importance of the event.D.Describe the process of the search.【答案】 （1）C（2）A（3）B（4）B 【解析】【分析】本文是一篇說明文，科學家們發(fā)現了他們認為是去年墜落地球的流星碎片。這些物體是在美國太平洋沿岸發(fā)現的。一場巨大的流星雨導致了在海中搜索的開始。科學家更喜歡在海洋中尋找流星是因為他們可能會發(fā)現更大的巖石顆粒。 （1）考查細節(jié)理解。根據第二段中的“The group says its aim at present is to examine areas of the ocean that have never been explored before.”可知，the Ocean Exploration Trust的船員目前的目標是研究海洋中未被探索的地方。故選C。 （2）考查推理判斷。根據第一段中的“Scientists have found what they believe are pieces of a meteor(流星)that fell to the earth last year.”可知，一場巨大的流星雨導致了在海中搜索的開始。故選A。 （3）考查推理判斷。根據第四段中的“The fact that the particles landed in the ocean, instead of on land, means larger pieces may have survived and can be studied.”可知，科學家更喜歡在海洋中尋找流星是因為他們可能會發(fā)現更大的巖石顆粒。故選B。 （4）考查推理判斷。根據最后一段中的“The objects recovered from the bottom of the sea likely came from the recent explosion for two main reasons.”可知，作者在最后一段是想給出支持猜測的理由。故選B。 【點評】本題考點涉及細節(jié)理解和推理判斷兩個題型的考查，是一篇科普類閱讀，考生需要準確捕捉細節(jié)信息，并根據上下文進行邏輯推理，從而選出正確答案。4．犇犇閱讀理解 Environmental experts warn that our planet is drowning in plastic. The world39。s cities produce 2 billion tons of trash every year. By the year