任何一个层次上的投资主体均有( )类决策。
A.5B.4C.3D.2
参考答案:C
An oligopoly is characterized by all of the following EXCEPT:()
A. large economies of scale.
B. significant barriers to entry.
C. a large number of sellers.
被狂犬咬伤后最正确的处理措施是()
A.注射狂犬病毒免疫血清+抗病毒药物
B.注射大剂量丙种球蛋白+抗病毒药物
C.清创+抗生素
D.清创+接种疫苗+注射狂犬病毒免疫血清
E.清创+注射狂犬病毒免疫血清