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1、广东省中山市卓雅外国语学校2020-2021学年高二英语下学期第一次段考试题广东省中山市卓雅外国语学校2020-2021学年高二英语下学期第一次段考试题年级：姓名：广东省中山市卓雅外国语学校2020-2021学年高二英语下学期第一次段考试题本卷共5页，满分120，考试用时120分钟。注意事项：1答题前填写好自己的姓名、班级、考号等信息2请将答案正确填写或填涂在答题卡上一、 阅读（共两节，满分50分）第一节 （共15题；每小题2.5分，满分37.5分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。A Caves (洞穴) have a primary appeal they h
2、old the secrets to our past and are mysterious in and of themselves. Mammoth CaveKentucky, USAThe longest cave system in the world lies beneath the Green River Valley in Kentucky and while over 400 miles of passageways have been mapped, it has yet to be fully discovered. The complex limestone labyri
3、nth (石灰岩迷宫) was discovered by humans 4,000 years ago. Blue GrottoCapri, ItalyOnce used as the personal swimming hole for the Roman Emperor Tiberius, this extremely bright sea cave is almost 200 feet long and 82 feet wide. Its unique glow comes from the light entering the small opening to the outside
4、. Avshalom Cave Nature ReserveBeit Shemesh, IsraelAlso known as the Soreq Cave Nature Reserve, Avshalom is considered to be the Rosetta Stone of climate history in the Eastern Mediterranean through the packed stalactites (钟乳石) found in the cave, some of which are over 13 feet long, and are as old as
5、 300,000 years. Cave of the CrystalsNaica, MexicoThis unique cave system in Mexico contains some of the largest natural crystals ever foundthe longest of which is 39 feet long and 13 feet thick. However, it is rarely explored due to logistical difficulties: it is extremely hot due to its location ab
6、ove a volcanic vent, and the huge crystals block also block the passage.1Where does the longest cave lie in?AKentucky, USABCapri, Italy.CBeit Shemesh, Israel.DNaica, Mexico.2Avshalom is famous as .Athe most beautiful cave.Bthe Soreq Cave Nature Reserve.Cthe Emperors swimming hole.Dover 400 miles of
7、passageways.3Which cave includes the largest natural crystals?ACave of the Crystals.BBlue Grotto.CMammoth Cave.DAvshalom Cave Nature Reserve.B Plastic remains one of the most-used materials for making many of the things we use in our everyday lives. Things made of plastic can be very strong and last
8、 a long time. They also do well in extreme heat and cold. Plastic is also much lighter than metal and can be easily formed into different shapes. This makes the material perfect for the uses across many different industriesBut the widespread use of plastics is causing major problems for the environm
9、ent. Plastic materials are causing serious damage to the worlds oceans.Plastics can take hundreds of years to break down on their own. Very few kinds are highly recyclable. This is because of the way plastics are formed. Even when recycling is possible, the process is costly and can use a lot of ene
10、rgy.But a team of researchers working at the U.S. Department of Energy say they have created a kind of plastic that could lead to products that are 100 percent recyclable.The researchers say the new material is a plastic polymer(聚合物)called polydiketoenamine, or PDK. The team reports that the materia
11、l can be broken down in parts at the molecular(分子的) level. It can then be built up again to form plastics of different shapes, colors and more. The researchers say this process can be repeated over and over again -without the plastic material losing any performance or quality.“Most plastics were nev
12、er made to be recycled,” lead researcher Peter Christensen said. “But we have discovered a new way to make plastics that takes recycling into consideration from a molecular point of view. Then we would be able to remove plastics from the oceans. Its going to be a really exciting time.”4Whats the pur
13、pose of the first paragraph?ATo show the advantages of plasticBTo explore the future of plasticCTo prove we cant live without plasticDTo introduce different plastic products5What makes it difficult to break down plastics?AWhat they are used forBHow they are formed.CThe deep oceanDThe high cost6What
14、can we learn about PDK?AIt can be used repeatedly.BIt can hardly be broken down.CIt is a colorful plastic polymer.DIt is used in some countries now.7What is the best title for the text?APlastic and industry.BPollution and environment.CPlastic: a most-used material.DPDK: a new recyclable plastic.C So
15、me scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings.The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.Decibels (分贝)measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes p
