目的了解MRSA的耐药性及分子流行病学特点。方法采用纸片扩散法检测住院患者分离的160株MRSA的耐药性；采用随机引物（AP）-PCR法对其中......

In this paper,we study the existence unipueness and stability of the periodic solutionsfor fourth-order nonlinear nonhom......