Ⅰ.Introduction　　Discourse analysis is connected with “the study of the relationship between the context in which it ......

Abstract　　This paper uses an Additive Neural Network model built with neural networks to analyze the key factors in de......

调查黄石市存在的的野生蔬菜资源，共计101种，隶属57科97属。从植物习性、生境、食疗价值、食用方法等方面，介绍了黄石市民常食的15种......

于2013-2014年，对河西走廊制种玉米田的病害进行了调查采集、分离培养、致病性测定与鉴定，其中病毒病采用观察组织中内含体和电镜观......