“一方水土养一方人．”受自然环境的影响，北方地区和南方地区的人们，在生产方式、生活习惯、文化传统等方面有很大差异．下列叙述与北方地区相符的是（ ）
①农田以旱地为主               
②作物熟制一年一熟或两年三熟
③藕、竹笋是常见食材           
④以种植小麦、大豆为主
⑤民居屋顶坡度较大，墙体较厚．

细菌、真菌等营腐生生活的生物在生态系统中的作用是（　　）

   What's the most important thing for you to have in your life? Somebody mentions hard-work, others suggest knowledge, love and luck.
If you arrange the 26 English letters alphabetically(按字母表的顺序)and use numbers to represent each of them, for example, 1 for a, 2 for b, 3 for c…, you can change an English word into a number. So hard-work becomes 8+1+18+4+23+15+18+11="98," meaning 98 is its mark; knowledge: 11+14+15+23+12+5+4+7+5="96," while love :12+15+22+5="54," and luck : 12+21+3+11="47," a small mark. None of these words can give one a full mark. What about money or prayer(祈祷)? They can’t, either.
   Then what else? Don't be worried. You can always find an answer to a problem in your life, when you change your way of looking at things or doing things, or your attitude. Yes, attitude is the word. See for yourself: attitude:1+20+20+9+20+21+4+5=100，a full mark.
Different attitudes lead to different courses of life. Most times people hope for a better life. It is possible that one will have a change for the better after one has changed one's attitude.
   When you change your manner and become friendly towards others, you'll meet more smiling faces towards you. In the same way, if you take a positive attitude towards failure(失败), you'll find it's also rewarding though it has caused you losses.

如图为不同植物类群的一些代表植物的图片，请据图回答下列问题：

根据句意及汉语提示完成句子。