[问答题] 简述隐藏新棘虫的主要特征。

什么叫"界域语"，它在人际交往中有哪些要求？ 有毒品对人体的危害有哪些？ （）may be defined as a departure without justification and under no necessity from the proper and usual course of an agreed voyage，whereby the character and the incidents of such voyage are altered. ["Deviation","Change","Alteration","Amendment"] 弯曲件圆角半径过大、过小会产生什么影响？ 试阐述城市物流的概念。 简述隐藏新棘虫的主要特征。