题干
难忘的初中生活就要结束了。假如你是韩梅, 即将迎来全新的高中生活。为了尽快适应新的环境, 你打算在英语俱乐部的QQ群里留言, 谈一谈自己在高中学习、生活和与人相处等方面可能遇到的问题, 并向大家寻求帮助。
注意: 1.词数：80左右。
2.文中不能出现自己的姓名和所在学校名称。
3.留言开头已给出, 不计入总词数。
Hi, everybody. How's it going? I'll become a senior high school student this September.……
答案(点此获取答案解析）
Hi, everybody. How's it going? I'll become a senior high school student this September. I'm very happy, but I'm worried that I may meet with some difficulties in the new school. Perhaps I can't keep up with my classmates, especially in math. And I'm n
则“△ABC是钝角三角形”的一个必要而不充分条件是 （ ）