PAGE（）。
A.醋酸纤维膜电泳
B.琼脂免疫电泳
C.对流免疫电泳
D.火箭电泳
E.聚丙烯酰胺凝胶电泳
参考答案：E
The conference has been held to discuss the effects of tourism________the wildlife in the area.[ ]
A．in
B．on
C．at
D．with
