【已刪除】30.關於固相萃取的操作程序，下列何者正確？①conditioning ②washing ③eluting ④sample loading
(A)②①④③
(B)④①②③
(C)①④②③
(D)④③②①

答案：登入後查看
統計： A(0), B(0), C(1), D(0), E(0) #2624615