It is hoped that you can make some adjustments about the quality of your service         the reactions of the customers.

A．in return for

B．in response to

C．in favor of

D．in charge of

肥达试验是一种（）.

A.定量凝集试验

B.半定量凝集试验

C.定性凝集试验

D.沉淀试验

E.补体结合试验