It was in this house ______ he was born and grew up.

A．that

B．where

C．which

D．when

应用酶联免疫法检测抗破伤风类毒素抗体，加底物显色后，所测定的颜色的光密度值（）

A.同病人血清中特异性抗体的浓度呈正比

B.同固相上结合的抗原呈正比

C.同病人血清中特异性抗体的浓度呈反比

D.同酶标记的抗体浓度呈正比

E.同酶底物的浓度呈正比