Hundreds of people had to be _______ because the stadium was so full that it couldn't even admit one drop in.[ ] 

A. looked into   

B. turned away  

C. picked up  

D. sent for

免疫电泳的结果，主要是观察（）。

A.沉淀环的直径

B.沉淀弧的长短

C.沉淀峰的高低

D.形状和位置

E.沉淀弧的方向