用酒精灯给试管里的液体加热时，发现试管破裂，可能的原因有（）
①用酒精灯的外焰给试管加热 ②加热前试管外壁上的水没有擦干 ③加热时试管底部触及灯芯 ④加热时没有不时的上下移动试管 ⑤没有进行预热，直接集中加热试管里液体的中下部

    The sun comes up in the east and goes down in the west. When the sun rises， It is morning. When the sun sets， it is evening. When the sun is shining， it is day. Morning is the time between sunrise and twelve o'clock， or between sunrise and lunch. At twelve o'clock， the sun is the highest in the sky over our heads. The sun is overhead at noon. The sun shines during（在……期间）the day. The moon and the stars shine during the night. When the sun rises， it is light. It's light during the day. During the night， if the moon is not shining， it is dark. What are the days and nights like in summer? In summer the days are longer and the nights are shorter. What about in winter? In winter， the days are shorter and the nights are longer.

一件工程，甲队每天完成全部工程的 $\frac{1}{10}$ ，乙队每天完成全部工程的 $\frac{1}{15}$ ，两队合作1天能完成全部工程的____，还剩全部工程的____没有完成．(填分数)

①制定地方性行政法规，细化渔业管理的具体内容和措施

②严厉打击涉渔“三无”船舶及其它非法行为，整治禁用渔具和海洋环境污染

③明确党委、渔政、环保、公安等部门的管辖权限，提高各部门的执法效率

④通过公正司法，对执法过程中造成的公民权利的损害进行救济