专四
Sharks find their quarries by good sense of
[A]water waves made by quarries．
[B]smell and electrical magnetic Dower．
[C]light．
[D]blood．
细节题。文中提到“a shark has an extremely good sense of smell…Sharks also sense electrical and magnetic power linked to nerves and muscles of living animals',"由此可知鲨鱼靠嗅觉和电磁力量寻找猎物，因此[B]为答案。
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