材料一：“知之为知之，不知为不知，是知也。”“当仁不让于师。”

“温故而知新，可以为师矣。”

材料二：某中学初一（8）班新学期刚刚开学，班中屡次出现乱扔纸屑、破坏公物的现象。为此班委召开紧急会议，但大家意见不统一而争论了起来：

劳动委员：“一定要严厉惩罚，罚值日，实在不行，一次罚5元”

班长：“还是说服教育吧，一次不行就两次，两次不行就三次，相信他们会改的”。

学习委员：“随他们去吧，扔几张废纸而已，无所谓的事，根本不用管”。

请回答：

有根、茎、叶的分化，但不产生种子的植物类群是苔藓植物．

如图是静止在水平地面上的篮球，请作出这个篮球受力的示意图。

    Recently a really strange thing happened in a middle school in China's Hubei Province. Over 600 students at the school took part in a "caring for an egg like a baby"____(active). in which they were asked to keep an egg close at hand for a month____breaking it.

    "It's hard for parents to bring up their children____many students just ignore it, " said Liu Kang, the school's director. "They should____(teach) to be grateful to their parents,who have given them life but ask for nothing in return ."

    Li Ming is one of the students. His egg didn't break during the month, but he felt____(exhaust). "I now understand what great difficulty my parents have had____（bring）me up. I'll do all I can to make their life easier and____(comfort) when I grow up,”promised the 13-year-old boy.

    ____(luck), about 450 students broke their eggs. Yan Yueming broke his egg after just five days, which made him frustrated. He said,”I can't imagine ____sad my parents would be if there was something wrong with me, their ‘egg'! It is now time I did something____return for their love,”said Yan.

《登岳阳楼》                                 《夏十二登岳阳楼》

杜甫                                              李白

昔闻洞庭水，今上岳阳楼。                     楼观岳阳尽，川迥洞庭开。

吴楚东南坼，乾坤日夜浮。                     雁引愁心去，山衔好月来。

亲朋无一字，老病有孤舟。                    云间连下榻，天上接行杯。

戎马关山北，凭轩涕泗流。                     醉后凉风起，吹人舞袖回。

【注】开元二年（759），李白流放途中遇赦，回舟江陵，南游岳阳而作此诗。夏十二，李白朋友，排行十二。