【题目】课文阅读表达根据课文 Shark attacks 回答以下问题1. How many different types of sharks are there in the ocean?2. Why do many people know that the most dangerous shark is the white shark?3. What are the fierce sharks mentioned in the passage?4.Why have shark attack been increasing ...
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For one thing, boat motors stress these animals out, so when they see a boatload of researchers headed their way, armed with biopsy darts, they're like "oh no, it's time to dip!" — days and many thousands of dollars can be wasted chasing a pod of whales. And the alternative, ...
How Many People Have Substance Use Disorders? How Substance Use Activates the Brain's Reward System How Substance Use Changes Brain Chemistry 11 Criteria of Substance Use Disorder Why Do Substance Use Disorders Affect Some People and Not Others? 6 Types of Substance Use Disorders Behavioral ...
题目 A new rule has been passed that will protect more than 50 of the world's shark species,many of which are endangered.The rule was signed by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES),which manages how people deal in plant...
food. These types of bonds show how intensely whales can feel when it comes to their family and children. Humpback whales also nurture their young and appear to form deep bonds with them, despite larger whales like the humpback being somewhat solitary compared to some of the other toothed ...
A team at the University of Western Australia studied the visual systems of many different species of sharks and what they have found is diversity in eye design that mirrors the ecological and behavioral diversity of the shark species. The team looked at the retinal cells o...
While toxic metals such as arsenic, cadmium or lead are concerning in a variety of sample types, they exist only in the lower trace range in fish, whereas the element mercury is the most problematic heavy metal, primarily as a consequence of contamination in marine ecosystems. ...