题目内容
【题目】 英语课上，同学们正在讨论和朋友之间一件难忘的事情。假如你是李华，请你根据所给提示和要求，用英语写一篇短文，介绍你和朋友之间难忘的事。
提示：
(1)What is the unforgettable thing between you and your friend?
(2)Why is it unforgettable in your life?
要求：
(1)短文须包含所给提示，可适当发挥。
(2)短文中不得出现真实的人名、校名和地名。
(3)词数80个左右(开头已给出，不计入总词数)。
There were many unforgettable things between_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
【答案】There_were_many_unforgettable_things_between my friend and I, but one thing I will never forget.
One day, my friend Li Lei and I went to school together. On our way to school, a boy rode a bike so fast that the bike was out of control. In this situation, Li Lei pushed me away immediately, and then he was knocked down. His left leg was badly hurt , so he had to stay in hospital. After that, I helped him with his study and shared the interesting things happening in our class.
Friends are very important in our life. When we are in danger, they will help us out.
【解析】
略
应用题作业本系列答案【题目】阅读下列材料，结合所学地理知识，回答有关问题。
材料一河流是人类文明的摇篮，为人类社会的发展和进步作出了重要贡献但有时也带给人类灾难。
材料二河流弯曲系数是河流长度与源头到入海口直线距离的比值，是判断河流弯曲程度的指标。
材料三世界部分河流的长度和源头到入海口的直线距离（如表）。
河流 | 尼罗河 | 亚马孙河 | 长江 | 密西西比河 | 叶尼塞河 | 黄河 |
实际长度（km） | 6771 | 6480 | 6397 | 6262 | 4086 | 5464 |
源头到入海口的直线距离（km） | 3762 | 3020 | 2598 | 2614 | 2692 | 2093 |
（1）分析以上材料，表中弯曲程度最大的河流是______。
（2）黄河流城和尼罗河流域都是人类古代文明的发祥地，共同的社会经济原因是______；亚马孙河流域没有出现人类古代文明的自然原因主要是：______。
（3）大江大河往往承担着重要的航运任务，但黄河和叶尼塞河航运业并不发达，黄河航运业不发达的自然原因是______；叶尼塞河航运业不发达的社会经济原因是______。
（4）黄河是中国的“母亲河”。但它自古多忧患。试提出黄河下游水患的防治措施：______。