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【C1】______ snakes, lizards, and crocodiles, turtles belong to the class of animals called reptiles. The earliest fossils recogni
【C1】______ snakes, lizards, and crocodiles, turtles belong to the class of animals called reptiles. The earliest fossils recogni
admin
2010-01-15
49
问题
【C1】______ snakes, lizards, and crocodiles, turtles belong to the class of animals called reptiles. The earliest fossils recognized【C2】______ turtles are about 200 million years old and【C3】______ the time when dinosaurs roamed the Earth. Turtles have changed little in appearance【C4】______ that time.
About 250【C5】______ of turtle are found throughout the temperate and tropical regions of the world, including the major seas.【C6】______ other reptiles, whose populations are【C7】______ largely to the tropics, turtles are most abundant in southeastern North America and southeastern Asia. They live in lakes, ponds, salt marshes, rivers, forests, and even deserts. The size of turtles【C8】______ Bog or mud turtles grow 【C9】______ about 4 inches long. The sea-roving leatherback turtle, however, may be more than 6.5 feet【C10】______ length and weigh more than 1, 100 pounds. Alligator snappers of the southeastern United States reach weights of more than 110 pounds. They are among the largest freshwater turtles. Land-dwelling species are often called tortoises. In the United States some【C11】______ turtles are called terrapins.
Turtles have protective shells. The【C12】______ arched part is called the carapace; the【C13】______ bottom part is the plastron. Some species, such as the box turtle, can【C14】______ the head, legs, and tail and tightly close the hinged front and back halves of the plastron for【C15】______ The snapping turtle,【C16】______ , has a small plastron that does not cover its underside. Powerful jaws and claws are the snapping turtle’s best defense【C17】______ enemies. Sea turtles also are【C18】______ to retreat completely inside their shells. Side-necked turtles have necks that are too【C19】______ to tuck into their shells.【C20】______ , the neck folds sideways along the inner edge.
【C16】
选项
A、consequently
B、nevertheless
C、however
D、while
答案
C
解析
本题也需要通过上下文判断。四个选项中,consequently表示因果关系,nevertheless意思是“尽管如此,不过”,表示对前者的否定。While可以做连词,表示两者的对比。这三个选项均不合题意。只有however意思为“然而”,表示转折,为符合题意的正确选择。
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0
专业英语四级
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