读下列材料回答问题。
材料一：
我国三个地区的人口密度和人均土地资源情况表
我国简图
中分别填入ABC三地区。（2）根据上题的判读，从可持续发展的角度出发，简析AC两地区发展农业的优势条件和不足条件分别有哪些？
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（3）环境管理就是对损害自然环境质量的人类活动施加影响，实施环境管理的手段有哪些？
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（1）A位于华北平原，B位于东南丘陵，C位于青藏高原
（2）A地区：利耕地面积大，劳动力充足；不利旱涝、风沙、盐碱地、中低产田多。C地区：利草场资源丰富不利生态环境脆弱、热量不足、耕地面积少。
（3）行政手段、法律手段、经济手段、技术手段、宣传教育手段。
阅读下列短文，根据短文中的信息完成文后表格。（每空一词） How to beat sadness! We all have days when we are tired and unhappy. That’s OK. You need days like this, or how would you know you are happy? You’ll enjoy your good days even more when you have a few bad days. Even if sadness is a part of life, let’s try to make it small. Here are a few simple ways to help you feel better when you are feeling sad. 1. Stand up straight and this helps your energy flow. When your energy is flowing freely, you can flow too. 2. Smile! It’s easy to do and have good results. This way cannot only leave you in a good mood but also bring others a good mood. 3. Listen to music. It can be your favourite music. Some kinds of music work better than others, so try and find out what kind of music works the best for you. 4. Take some “me” time. You can find pleasure in reading a book, watching a sunrise or having a hot bath, or something like that. 5. Exercise. Even something as simple as taking a walk will get your blood flowing. It is a great way to clear your mind of anything that makes you sad. These ways will cheer you up when you are unhappy, but don’t just use them when you are sad. Try and practice them every day to make them a habit. You will be surprised to learn that these simple ways will keep your sadness away. But if you are in a deep depression (沮丧), go to see a doctor. How to beat sadness
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