人被老鼠咬后注射疫苗可避免鼠疫，此免疫属（　　）

A．特异性免疫

B．计划免疫

C．非特异性免疫

D．自然免疫

The WTO cannot live up to its name（）it does not include a country that is home to one fifth of mankind.

A.as long as

B.while

C.if 

D.even though