【文章內(nèi)容簡介】 it is a sign of tim”也就是說，這是時間的標志，”可知，劃線詞的意思是“標志，象征”。故選C。 （3）考查推理判斷。根據(jù)第三段中的“This is notable because panies such as Apple are reportedly developing AR glasses to assist — or perhaps even replace — smartphones.”這一點值得注意，因為據(jù)報道，蘋果(Apple)等公司正在開發(fā)增強現(xiàn)實眼鏡，以幫助——甚至取代——智能手機?！?可知，我們可以從文中推斷，科技公司將面臨智能手機可能被取代的事實。故選D。 （4）考查推理判斷。根據(jù)最后一段中的“But don39。t get too excited. There39。s still a lot of work to be done in the meantime, including various trials to make sure the radios play nicely with hardware and infrastructure construction so 5G isn39。t concentrated only in big cities.”但是不要太激動。與此同時，仍有很多工作要做，包括各種試驗，以確保收音機能很好地配合硬件和基礎(chǔ)設(shè)施建設(shè)，這樣5G就不會只集中在大城市?！笨芍髡呓酉聛砜赡軙嬖V我們“如何全面擴大5G覆蓋?！惫蔬xA。 【點評】本題考點涉及段落大意，詞義猜測和推理判斷三個題型的考查，是一篇科普類閱讀，要求考生根據(jù)上下文的邏輯關(guān)系，進行分析，推理，概括和歸納，從而選出正確答案。4．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(xiàn)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(xiàn)的。一場巨大的流星雨導致了在海中搜索的開始?？茖W家更喜歡在海洋中尋找流星是因為他們可能會發(fā)現(xiàn)更大的巖石顆粒。 （1）考查細節(jié)理解。根據(jù)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(jù)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(jù)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(xiàn)更大的巖石顆粒。故選B。 （4）考查推理判斷。根據(jù)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(jù)上下文進行邏輯推理，從而選出正確答案。5．犇犇閱讀理解 Hacking isn39。t just for puters and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant39。s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world. Photosynthesis（光合作用）is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant39。s genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent. Specifically, scientists hacked the plant39。s protective system. Normally, this system is activated when a plant gets too much sunlight, said scientist Krishna Niyogi, coauthor of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow. Stephen Long is the lead author of the study. He pared a plant39。s protective system to lightadjusting glasses. When a p