题目

假设你是李华。昨天你参加了学校组织的演讲比赛，并荣获一等奖。由于你的英语教师高老师对你这次参赛提供了许多帮助，现在你想用英语给他写一封电子邮件，内容包括： l．介绍参赛情况； 2．告知获奖情况； 3．陈述获奖时的感受。 注意：词数120左右。开头和结尾已给出，不计人总词数。 答案：One possible version: Dear Mr. Gao, I am writing to tell you about the English Speech Contest I took part in yesterday. As the only competitor from our class, I had to compete against other 14 excellent participants selected from the whole school. When it was my turn, I got a little bit nervous at first, but soon I calmed down at the thought of your instructions.  Then everything went smooth向水中加入少许食盐，食盐逐渐溶解，水变咸了；将溶液温度升高，再加入等量食盐，食盐还能继续溶解，且溶解速度加快．仅仅通过上述现象，我们无法得出的结论是（　　） A、微观粒子间存在着间隔B、温度升高，固体物质的溶解度一定增大C、微观粒子是不断运动的D、温度升高，粒子的运动速率加快