My interests include football, bowling and surfing the web________studying my favorite subjects.[ ]

A. instead of  

B. as well as

C. less than  

D. rather than

病原菌检测中，属于清洁级大鼠必须检测项目的是：（）

A.小肠结肠炎耶尔森菌

B.沙门菌

C.假结核耶尔森菌

D.念珠状链杆菌