declines相关论文
信仰是农民问题中的大问题。当前，随着农村生活的急剧变化，农民对信仰的追求面临异常复杂的情况。这其中，在一些农村的一部分农民的信......
Recent changes in breeding abundance and distribution of the Common Pochard(Aythya ferina)in its eas
Background:The Common Pochard(Aythya ferina)(hereafter Pochard),a widespread and common freshwater diving duck in the Pa......
