The scientists are trying to _     _ a good solution to save people who have got HINI flu

in our country.            [ ]

A.  come out            

B.  come down              

C.  come up with

下列试验中血标本受溶血影响最小的是（）。

A.K⁺测定

B.LD测定

C.血清铁测定

D.Na⁺测定

E.AST测定