What worried the child most was _____________ to visit his mother in the hospital.[ ]

A. to his being allowed

B. his not being allowed        

C. not his being allowed                  

D. not his allowed

下列哪一种是纤溶系统抑制物？（）

A．α₂巨球蛋白和纤溶酶原激活抑制物PAI

B．α₁-抗膜蛋白酶和纤溶酶原激活抑制物PAI

C．α₂-抗纤溶酶(α₂-A和纤溶酶原激活抑制物PAI

D．C₁-灭活剂和α₂-AP

E．AT-m和α₂-AP