Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.

A．normal; common

B．usual; ordinary

C．common; usual

D．ordinary; normal

国防和军队建设的指导思想是（）。

A.毛 * * 军事思想

B.邓 * * 新时期军队建设思想

C.江 * * 国防和军队建设思想

D.科学发展观