A _____________ is a group of people who work together, for example, on a ___________.
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If something is _____________, it is usual and not very special.
When you ______________ people, you make sure they have everything they need.
When you ______________ something, you make it.
苔藓虫喜欢在较清洁、富含藻类、溶解氧充分的水体中生活。
A. 对
B. 错