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What is the main idea of the passage? [br] Different from most fishes, shark’s b
What is the main idea of the passage? [br] Different from most fishes, shark’s b
游客
2023-07-18
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管理
问题
What is the main idea of the passage? [br] Different from most fishes, shark’s body is not upheld by ______.
选项
A、fiber
B、bones
C、cartilage
D、skeleton
答案
C
解析
本题问“与大多数的鱼类不同,鲨鱼的身体不是由什么支撑”。文中第二段提到“Unlike bony fish,sharks have no bones;their skeleton is made of cartilage (软骨),which is a tough,fibrous(纤维性质的)substance,not nearly as hard as bone.”也就是说,与多骨鱼类不同,鲨鱼没有骨头,它们的骨骼是由坚韧、纤维性质的软骨构成,不像骨头那样硬。故[C]“骨头”正确。[A]“纤维”指的是鲨鱼软骨的性质。 [B]“软骨”和[D]“骨泉”由第二段可知,鲨鱼的身体是由软骨构成的骨架支撑的。
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