How can sharks find their quarries? [br] [originaltext] Scientists say shark

游客2024-09-24  12

问题 How can sharks find their quarries? [br]  
Scientists say sharks have lived in the world’s oceans for millions of years. Scientists say there are more than 350 different kinds of sharks.
    Sharks do not have bones, and a shark has an extremely good sense of smell. It can find small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. Sharks also sense electrical and magnetic power linked to nerves and muscles of living animals. These powerful senses help them find their food. Some sharks will eat just about anything. Many unusual things have been found in the stomachs of some large sharks. They include shoes, dogs, a cow’s foot and metal protective clothing.
    About forty percent of the different kinds of sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies like humans do.
    Scientists are beginning to understand the importance of sharks to humans. Medical researchers want to learn more about the shark’s body defense system against disease. They know that sharks recover quickly from injuries. Sharks appear never to suffer infections, cancer or heart diseases.

选项 A、Bone structure.
B、Smell ability.
C、Birth mode.
D、Recovery ability against disease.

答案 C

解析 题目问的是在哪一点上一些鲨鱼与人类相似,由原文中的…carry their young inside theirbodies like humans do可知答案为[C]。
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