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但就在路小北和肖枫彼此鼓励，逆流而上时，一场意外却悄然而至…5. A tugboat or the last of several tugboats, if equipped with a crew, shall make four consecutive sounds at intervals of not more than 2 minutes at a time, i.e. One long sound followed by three short sounds. When feasible, such sound shall be sounded immediately after the tugboat sounded the sound.九十年代末期，处在改革攻坚阶段的中国煤炭业，在亚洲金融危机的冲击下、煤炭市场供大于求、整个煤炭业面临前所未有的困难和考验，有的煤矿经过改革已经扭亏脱困，有的煤矿则陷入更为艰难的困境之中。地处中国北方的晋阳矿务局三矿，原本是中国煤炭企业高效生产的一面旗帜，在此期间却因为多方原因陷入濒于颓败的绝境。晋煤集团高层领导毅然下决心撤换了没有功劳但有苦劳的原三矿矿长孙忠诚，将曾经在三矿做出成绩的副总赵志坚从党校抽调回来派往三矿，一手提拔赵志坚的集团董事长，党委书记毕世海在赵志坚临行前和赵志坚立下生死状，赵志坚如能在三年内带领三矿走出困境，实现安全生产、扭亏为赢，重整三矿昔日雄风，三年后，他保证拱手将晋煤集团最高领导权交给赵志坚，如果赵志坚在三年内，搞不好三矿，赵志坚便卷铺盖走人……原本是作为一个普通技术员从三矿走出去的赵志坚，今天却临危受命，做为一个大矿矿长身份重返了绝境中的三矿，为了完成领导的重托，为了让三矿近十万名职工家属不再对未来失望，赵志坚到任后、排除来自各方的干扰，摸清三矿陷入困境的诸多原宝儿喜欢鹰，但是他又嫌鹰字太过像禽兽，于是自己改个‘羽字。Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.公元2029年，人类为了寻求更大的生活空间而前往其它星球发展。航天员里欧 (马克华伯格 饰)就是为了要找寻更好的星球，独自一人驾驶航天飞机探索宇宙，却不幸迷失于星际间，坠毁在一个未知星球的沼泽丛林中。CalendarPopup: Allow a calendar selection box to pop up. When the value is true, the input button on the right becomes a drop-down button similar to QComboBox. When the button is clicked, a calendar selection box will appear to select a date on the calendar. This property is not valid for QTimeEdit.