What kind of difficulty do doctors usually have according to the passage?They a

游客2024-07-10  13

问题 What kind of difficulty do doctors usually have according to the passage?
They are usually too busy to ask ______
[br] What’s the problem if too many people live in a small space?
That makes it hard to keep the cities ______.
What kind of difficulty do doctors usually have according m the passage?

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答案 safe and clean

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