简述草坪土壤的特殊性。
参考答案：
1.草坪建成后土壤容易产生板结问题。
2.草坪建成以后，土壤需要长期使用。
3.草坪草为禾本科，须根系较发达，但草坪需要经常修剪，相应的根系短缩，吸收的营养相对减少，则要求土壤中的营养物质充分，因此对草坪的质量要求很高，这样才有利于草坪的恢复。
4.草坪一旦建成，几乎不再进行更换，这就对土壤的要求非常高。
北京阳光中学九年级学生Simon目前学习成绩不理想，他写信给青少年辅导员Sigmund Friend，倾诉困惑，寻求帮助。假设你是Sigmund Friend, 请根据所给的信息，完成一封给Simon的回信，内容要点如下：
1. 书信须包括所有内容要点，要求语句通顺，意思连贯； 2. 建议部分的第4个要点内容须用1～2句话展开合理想象，作适当发挥； 3. 词数80个左右，已给出的句子，不计入总词数。 Dear Simon Thank you for your letter. You say that ________________________________________________ ________________________________________________________________________________ You probably think you will never be a top student. This is not necessarily so, however. Anyone can become a better student if he or she wants to. Here’s how. Plan your time carefully. When you plan your week, you should make a list of things that you have to do. Make good use of your time in class. _________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ Develop a good attitude about tests. _________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ I hope my answers will be valuable to you. Best wishes Sigmund Friend |