【多选题】根据我国《民事诉讼法》的规定,因票据纠纷引起的诉讼,有管辖权的人民法院有( )。
【单选题】Principal White has been working in the school for about 20 years, ________ all his energy to teaching an d researching as well as the running of a healthy school. [ ]
【单选题】某工厂计划生产甲、乙两种产品。生产每套产品所需的设备台时、A、B两种原材料和可获利润以及可利用资源数量如下表所示。则应按()方案来安排计划以使该工厂获利最多。
【单选题】I have been teaching my sister how to use the internet, it’s necessary to learn the skill. ----_____________________.