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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
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2010-01-15
56
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.
【C17】
选项
A、by
B、from
C、against
D、for
答案
C
解析
本题考查的是名词defense和介词的搭配。defense后加against表示“抵御…”,所以本题的正确答案为选项C,其他三个选项均错。
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0
专业英语四级
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