一般港内船速要比海上船速低,其主要原因包括:() ["港内航行阻力增大,为了减小主机扭矩而降低船速;","港内航行阻力增大,为了增大主机扭矩而降低船速;","港内航行阻力减小,为了减小主机扭矩而降低船速;","港内航行阻力减小,为了增大主机扭矩而降低船速。"]
预防传染病要从哪三个方面着手?
按顾客购买行为的特征,将购买行为类型分为() ["习惯型","理智型","保守型","冲动型","从众型"]
顾客的购买动机包括() ["求实","求廉","求美","怀旧","惠顾"]
()是船舶在深水中可以使用的最高船速。 ["港内船速","海上船速","额定船速","经济航速"]
在殡仪服务机构营销殡葬用品时,销售岗位的殡仪服务员应掌握什么技巧?