An extreme solar cosmic ray event broke out on 2005 January 20.Not only is it the most intensive solar energetic particle (SEP) event,with>100 MeV particles meas
The spatial distribution of plant populations is an important feature of population structure and it determines the population's ecological preferences,biologic
Objective: To compare efficacies and safeties of DICE and CHOP regimens in treating intermediate and high grade non-Hodgkin's lymphoma(NHL), and indicate the st