如何写挽联?
有关船舶在旋回中降速的下述说法,不正确的是:() ["船舶旋回中因舵阻力增加而引起降速","船舶旋回中因推进器效率下降而引起降速","瘦削型货轮比肥大型油轮产生更多旋回降速","相对旋回初径越小,则旋回中降速越多"]
循环回流
具有抗结核及超广谱抗菌作用的药物是() ["A.异烟肼","B.利福平","C.PAS-Na","D.乙胺丁醇"]
船舶作大舵角快速转向时,会产生横倾,其横倾的规律是:() ["内倾","外倾","先内倾后外倾","先外倾后内倾"]
怎样去把握不同殡仪服务对象消费心理特征?