[问答题] 简述长棘吻虫病的病原。

战略是一种观念的重要实质在于，它同（）、文化和（）等精神内容一样为企业成员所共享。 开卷落料线由哪几部分构成？各自完成哪些工作？ Where tanks are arranged for either oil or ballast, （） must be fitted in the pipeline. ["a change-over chest","a head tank","a emergency bilge pump","an air cooler"] The dumping of refuse in a lock is permitted（）. ["when approved by the lockmaster","when locking downbound","at no time","during high water only"] 街面治安巡察时在礼仪上应注意哪些？ 简述长棘吻虫病的病原。