By the side of the Bird’s Nest_____, completed in 2008.

A there standing the Water Cube         B does the Water Cube stand

C the Water Cube stands              D stands the Water Cube

.浮选过程使用的浮选剂包含捕集剂、调整剂和（）

A.起泡剂

B.消泡剂

C.乳化剂

D.破乳剂