显微镜下观察小鱼尾鳍的毛细血管时，应该寻找（   ）。

某同学要探究单摆来回摆动一次的时间与什么因素有关，于是他准备了不同质量的小铁球（质量已知）、细绳、刻度尺、铁架台等器材，实验装置如图所示．

2013年暑假,我和同学参加了志愿者服务,受到了表扬,心里美滋滋的;在公共场所,我会约束自己的行为,注意自己的形象;有人当众叫我的绰号,我很恼怒;我在学习上有了很大进步,希望老师表扬我;如果老师让我在大会上发言,我会穿得整整齐齐,并做好充分的准备。

以上五种情景,哪些是自尊的表现?请说明理由。

用方框中所给词的适当形式填空，完成短文。

   Hello!  I’m Jenny. There ____  many festivals at our school. Let me____ you!  This month is October. All the ____  love October. In October, there is a Sports  Festival. We have a basketball game ____ a volleyball game during (在…期间) the festival. In the middle (中旬) of this month, we____  an English speech contest during the English Festival. October 19th is the day for a school trip. We go to Beijing ____  the teachers. On the last day of this month, there is a Music Festival. On that day, we can enjoy beautiful songs, piano music and so on. It is wonderful. Next month, there is ____ Art Festival. Students often display  (展示) ____  pictures on that day. I study and play games____  my school. It gives ____ happiness (快乐). I love my school very much.

上初中了！以下是几位新生对初中新生活的感受，其中比较客观、积极向上的是（        ）。