[问答题] 简述伞形棘衣虫的主要特征。

（）is the price paid to a Shipowner for the transportation of goods or merchandise by seafrom one specific port to another． ["Freight","Freight rate","Hire","Lighterage"] 提高冲裁件质量的几种冲压工艺方法？ 肝糖原分解 （）is the offense against navigational rules and will make the ship unseaworthy with the Shipowner responsible for all the consequences. ["Overloading","Overtaking","Overboarding","Overlining"] 会见客人时应如何安排座位？ 简述伞形棘衣虫的主要特征。