砺剑·2023相约高考 新高三培优卷(三)3数学试题答案

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第一部分阅读理解（共两节，满分40分）》第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。AWith hundreds of beaches to choose from the islands of Andaman and Nicobar,it can be hard to decide on asummer destination.Here is the best place to visit in Andaman and Nicobar Islands in May.Ross and Smith BeachOffering a long stretch of greenish blue-tinted waters,soft white sands,and plenty of trees for shade,Andaman and Nicobar Islands'most impressive beach is worth a visit,especially if you love to stroll()justafter daybreak.With shallow waters,Ross and Smith Beach offers many underwater activities,among whichspotting fishes is very common.Radhanagar BeachFar-famed for its white sands and clear water,Radhanagar Beach was chosen to be the best beach in Asia byTime magazine in 2004.Thus,it attracts millions of tourists and travelers from all across the world round theyear.If you are someone who loves fun water activities,you must visit this beach.Havelock BeachIt is one of the very popular beaches in Andaman and Nicobar Islands.If you love underwater activities likescuba diving(戴水肺潜水)，you ought to visit this place.There are spots for licensed divers to enjoy and there arenumerous places where training for amateur()divers is provided.This place has a rich coral forest and themost incredible underwater life.If you love underwater snap shooting,this place is a paradise for you.Merk Bay BeachThe surf is appealing,the sand is soft,and the sunsets are beautiful.Merk Bay Beach is filled with fun,soit's not for retiring types.And out of the hundreds of isolated islands,this is the best.If you are a thrill-seeker,this is the best beach to be on.Due to the clear waters,you can easily spot tropic and colorful fishes whileswimming.Many vacationists camp overnight by the beach for fun.1.Which beach was ever considered the best in Asia by a magazine?A.Ross and Smith Beach.B.Radhanagar Beach.C.Havelock Beach.D.Merk Bay Beach.2.What can Havelock Beach offer to travelers?A.Diving training.B.Diving licenses.C.Forest camping.D.Deep-sea fishing.3.What are travelers advised to do by Merk Bay Beach?A.Catch fishes.B.Camp underwater.C.Watch sunsets.D.Create sand sculptures.【语篇导读】本文是一篇应用文。文章主要介绍了位于安达曼和尼科巴群岛的四处沙滩。l.B细节理解题。根据Radhanagar Beach中Radhanagar Beach was chosen to be the best beach in Asia by Timemagazine in2004可知，Radhanagar Beach曾被杂志评为亚洲最好的沙滩。2.A细节理解题。根据Havelock Beach中there are numerous places where training for amateur divers isprovided可知，Havelock Beach可以向游客提供潜水训练。3.C细节理解题。根据Merk Bay Beach中The surf is appealing,the sand is soft,and the sunsets are beautiful,可知，Merk Bay Beach的游客可以在沙滩上欣赏日落。

8.滑坡体滑动方向及滑坡边界内的河流主要流向分别是A.滑向西南，向北流滑坡边界B.滑向东北，向南流一河流3200C.滑向西南，向南流湖泊O古堰塞湖D.滑向东北，向北流○湖相沉积物【答案】C会滑坡掩埋的阶地【解析】由图中滑坡边界、河流、滑坡掩埋的阶地的位置关系，以及滑坡体由高处向低处滑动，可推测滑坡边界范围内西南地势低，滑坡体滑动方向为滑向西南；滑坡体阻断河流形成堰塞湖，堰塞湖位于滑坡体的上游方向，故河流由北向南流。9.经测定，新、老湖相沉积物形成于距今1~3万年前，据此可推测A.滑坡掩埋阶地的时间约为1万年前B.古滑坡的发生时间至少在3万年前C.古堰塞湖存留的时长大约为3万年D.古堰塞湖溃坝的时间约在2万年前【答案】B【解析】由图可知，滑坡掩埋的阶地位于湖相沉积物的下游方向，可推测滑坡掩埋阶地的时间早于湖相沉积物，而新、老湖相沉积物形成于距今1~3万年前，故滑坡掩埋阶地的时间约为1一3万年前；由图中古堰塞湖的位置可知，古滑坡发生在湖相沉积物之前，即3万年前；古堰塞湖的形成时间为3万年前，其上游的湖相沉积物形成于距今1~3万年前，由此无法推测溃坝时间和存留时间。10.下列能示意该河流河床纵剖面变化的是水平距离水平距离ab*堰塞体位置滑坡前河床现代河床水平距离水平距离dA.aB.bC.cD.d【答案】B【解析】滑坡体阻塞河流，在其上游方向形成堰塞湖，导致其上游方向水流受阻，流速减慢，泥沙沉积，河床抬高；同时导致其下方泥沙减少，河床侵蚀大于淤积，河床下降。