齿轮泵在工作过程中有吸油腔和压油腔，这两个油腔就是（） ["A.油缸","B.油箱","C.密封的工作容积","D.都不是"]
市场观念的一种类别，指以消费需求为中心开展市场营销活动的观念，也称作（）。 ["生产者导向观念","消费者导向观念","管理者导向观念","销售者导向观念"]
A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the（）. ["areas where special materials are used","hazardous areas","location of emergency repair equipment","type and strength of materials used"]
生产者利用广告或人员推销，强力把产品销售出去，至于消费者是否满意或售后服务的问题，则完全不理会，此为（）观念。 ["A.生产","B.产品","C.推销","D.市场营销"]
代理银行办理集中支付业务时，遵循（）的原则。 ["先清算后支付","先支付后清算","定期支付","定期清算"]
变压器在哪些情况下应紧急停运？
