Ｄ同学一直是师生瞩目的“焦点”：高中三年的前五个学期里，学业水平一直是很有“规律”的波动，这次考试攀升到前几名，下次考试一定跌落到二十名开外；在教师面前表现得非常温驯，又是不断地问问题，又是频繁地答问题，又是那么地善解人意，与人为善，背地里却能做出整晚泡? D students have always been the focus of teachers and students. In the first five semesters of high school three years, the academic level has always been very “regular” fluctuations. This examination climbed to the top few, and the next test must fall to two. Ten people went outside and showed themselves very docilely before the teachers. They constantly asked questions and answered questions frequently. They were so considerate of the people and good for the people. But they were able to make bubbles all night long.