种子仓库在保存种子的时候，应保持空气流通，还应选择的适宜环境条件是（　　）

I don't like fishing. It's not fun. It's ____.

    Waste can be seen everywhere in the school. Some students ask for more food than they can finish and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don't agree with them.

    Waste can bring a lot of problems. Although China is rich in some resources, we are short of others, such as fresh water. It is reported that we will have no coal or oil to use in 100 years. Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.

    In our everyday life, we can do many things to prevent waste from happening. For example, turn off the water taps when we finish washing, turn off the lights when we leave the classroom and try not to order more food than we need. Little by little, everything will be changed. Waste can be stopped one day if we do our best to form the habit of saving.

阅读材料，回答问题

材料一：从接受康有为的学说开始，梁启超的理想便是改革封建王朝，使之变成君主立宪制的资产阶级的国家。1899-1903的激进，与当时的国内政治形势密切相关，由于戊戌变法的失败和清政府的顽固保守，梁启超转而接受的孙中山的激进方案。1905年他的政治态度复归保守，重新鼓吹起改良与立宪。在袁世凯复辟帝制的关键时刻，梁启超却又拒绝诱惑，不怕威胁，坚决维护民主共和。

——摘编自杜先菊《梁启超政治思想的变化》

材料二：孙中山说，欲救亡图存，“革命为唯一法门”。即认为不推翻清王朝，中国决无生存于竞争世界的希望……共和制度是当今世界上最好的制度，中国应当取法乎上，直接建立共和制度，“方才是人类的进步”。还提出，中国可以借鉴外国经验教训，“举政治革命、社会革命毕其功于一役”。

——摘自汤奇学《孙中山的社会进化思述评》

材料三：1938年，***在党的六届六中全会上作的题为《论新阶段》的政治报告中最先提出了“马克思主义中国化”这个命题。他指出：“没有抽象的马克思主义，只有具体的马克思主义。所谓具体的马克思主义，就是通过民族形式的马克思主义，就是把马克思主义应用到中国具体环境的具体斗争中去，而不是抽象地应用它。成为伟大中华民族之一部分而与这个民族血肉相联的共产党员，离开中国特点来谈马克思主义，只是抽象的空洞的马克思主义。”

——摘编自姚中国《论***对马克思主义中国化的历史贡献》

This place_____a school but now it's a library.